/* Draw test patterns to help determine correct gamma value for a display. When the intensities of the inner squares nearly match the intensities of their frames (from some distance the borders should disappear) then you've found the right gamma value. You can set Mesa's gamma values (for red, green and blue) with the MESA_GAMMA environment variable. But only on X windows! For example: setenv MESA_GAMMA 1.5 1.6 1.4 Sets the red gamma value to 1.5, green to 1.6 and blue to 1.4. See the main README file for more information. For more info about gamma correction see: http://www.inforamp.net/~poynton/notes/colour_and_gamma/GammaFAQ.html This program is in the public domain Brian Paul 19 Oct 1995 Kai Schuetz 05 Jun 1999 */ /* Conversion to GLUT by Mark J. Kilgard */ #include #include #include #include static void Reshape(int width, int height) { glViewport(0, 0, (GLint) width, (GLint) height); glMatrixMode(GL_PROJECTION); glLoadIdentity(); glOrtho(-1.0, 1.0, -1.0, 1.0, -1.0, 1.0); glMatrixMode(GL_MODELVIEW); glShadeModel(GL_FLAT); } /* ARGSUSED1 */ static void key_esc(unsigned char key, int x, int y) { if(key == 27) exit(0); /* Exit on Escape */ } static GLubyte p25[] = { 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, 0xaa, 0xaa, 0xaa, 0xaa, 0x00, 0x00, 0x00, 0x00, }; static GLubyte p50[] = { 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, 0xaa, 0xaa, 0xaa, 0xaa, 0x55, 0x55, 0x55, 0x55, }; static GLubyte p75[] = { 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, 0xaa, 0xaa, 0xaa, 0xaa, 0xff, 0xff, 0xff, 0xff, }; static GLubyte *stippletab[4] = {NULL, p25, p50, p75}; static void gamma_ramp(GLfloat yoffs, GLfloat r, GLfloat g, GLfloat b) { GLint d; glColor3f(0.0, 0.0, 0.0); /* solid black, no stipple */ glRectf(-1.0, yoffs, -0.6, yoffs + 0.5); for(d = 1; d < 4; d++) { /* increasing density from 25% to 75% */ GLfloat xcoord = (-1.0 + d*0.4); GLfloat t = d * 0.25; glColor3f(r*t, g*t, b*t); /* draw outer rect */ glRectf(xcoord, yoffs, xcoord+0.4, yoffs + 0.5); glColor3f(0.0, 0.0, 0.0); /* "clear" inner rect */ glRectf(xcoord + 0.1, yoffs + 0.125, xcoord + 0.3, yoffs + 0.375); glColor3f(r, g, b); /* draw stippled inner rect */ glEnable(GL_POLYGON_STIPPLE); glPolygonStipple(stippletab[d]); glRectf(xcoord + 0.1, yoffs + 0.125, xcoord + 0.3, yoffs + 0.375); glDisable(GL_POLYGON_STIPPLE); } glColor3f(r, g, b); /* solid color, no stipple */ glRectf(0.6, yoffs, 1.0, yoffs + 0.5); } static void display(void) { gamma_ramp( 0.5, 1.0, 1.0, 1.0); /* white ramp */ gamma_ramp( 0.0, 1.0, 0.0, 0.0); /* red ramp */ gamma_ramp(-0.5, 0.0, 1.0, 0.0); /* green ramp */ gamma_ramp(-1.0, 0.0, 0.0, 1.0); /* blue ramp */ glFlush(); } int main(int argc, char **argv) { glutInit(&argc, argv); glutInitDisplayMode(GLUT_RGB | GLUT_SINGLE); glutInitWindowPosition(50, 50); glutInitWindowSize(500, 400); glutCreateWindow("gamma test patterns"); glutReshapeFunc(Reshape); glutDisplayFunc(display); glutKeyboardFunc(key_esc); glutMainLoop(); return 0; /* ANSI C requires main to return int. */ } href='#n56'>56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 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/*
 * Copyright (c) 2014 Scott Mansell
 * Copyright © 2014 Broadcom
 *
 * Permission is hereby granted, free of charge, to any person obtaining a
 * copy of this software and associated documentation files (the "Software"),
 * to deal in the Software without restriction, including without limitation
 * the rights to use, copy, modify, merge, publish, distribute, sublicense,
 * and/or sell copies of the Software, and to permit persons to whom the
 * Software is furnished to do so, subject to the following conditions:
 *
 * The above copyright notice and this permission notice (including the next
 * paragraph) shall be included in all copies or substantial portions of the
 * Software.
 *
 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
 * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
 * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.  IN NO EVENT SHALL
 * THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
 * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
 * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
 * IN THE SOFTWARE.
 */

#include <inttypes.h>
#include "pipe/p_state.h"
#include "util/u_format.h"
#include "util/u_hash.h"
#include "util/u_math.h"
#include "util/u_memory.h"
#include "util/u_pack_color.h"
#include "util/format_srgb.h"
#include "util/ralloc.h"
#include "util/hash_table.h"
#include "tgsi/tgsi_dump.h"
#include "tgsi/tgsi_info.h"
#include "tgsi/tgsi_lowering.h"
#include "tgsi/tgsi_parse.h"
#include "nir/tgsi_to_nir.h"

#include "vc4_context.h"
#include "vc4_qpu.h"
#include "vc4_qir.h"
#ifdef USE_VC4_SIMULATOR
#include "simpenrose/simpenrose.h"
#endif

struct vc4_key {
        struct vc4_uncompiled_shader *shader_state;
        struct {
                enum pipe_format format;
                unsigned compare_mode:1;
                unsigned compare_func:3;
                unsigned wrap_s:3;
                unsigned wrap_t:3;
                uint8_t swizzle[4];
        } tex[VC4_MAX_TEXTURE_SAMPLERS];
        uint8_t ucp_enables;
};

struct vc4_fs_key {
        struct vc4_key base;
        enum pipe_format color_format;
        bool depth_enabled;
        bool stencil_enabled;
        bool stencil_twoside;
        bool stencil_full_writemasks;
        bool is_points;
        bool is_lines;
        bool alpha_test;
        bool point_coord_upper_left;
        bool light_twoside;
        uint8_t alpha_test_func;
        uint8_t logicop_func;
        uint32_t point_sprite_mask;

        struct pipe_rt_blend_state blend;
};

struct vc4_vs_key {
        struct vc4_key base;

        /**
         * This is a proxy for the array of FS input semantics, which is
         * larger than we would want to put in the key.
         */
        uint64_t compiled_fs_id;

        enum pipe_format attr_formats[8];
        bool is_coord;
        bool per_vertex_point_size;
};

static void
resize_qreg_array(struct vc4_compile *c,
                  struct qreg **regs,
                  uint32_t *size,
                  uint32_t decl_size)
{
        if (*size >= decl_size)
                return;

        uint32_t old_size = *size;
        *size = MAX2(*size * 2, decl_size);
        *regs = reralloc(c, *regs, struct qreg, *size);
        if (!*regs) {
                fprintf(stderr, "Malloc failure\n");
                abort();
        }

        for (uint32_t i = old_size; i < *size; i++)
                (*regs)[i] = c->undef;
}

static struct qreg
indirect_uniform_load(struct vc4_compile *c,
                      struct qreg indirect_offset,
                      unsigned offset)
{
        struct vc4_compiler_ubo_range *range = NULL;
        unsigned i;
        for (i = 0; i < c->num_uniform_ranges; i++) {
                range = &c->ubo_ranges[i];
                if (offset >= range->src_offset &&
                    offset < range->src_offset + range->size) {
                        break;
                }
        }
        /* The driver-location-based offset always has to be within a declared
         * uniform range.
         */
        assert(range);
        if (!range->used) {
                range->used = true;
                range->dst_offset = c->next_ubo_dst_offset;
                c->next_ubo_dst_offset += range->size;
                c->num_ubo_ranges++;
        };

        offset -= range->src_offset;
        /* Translate the user's TGSI register index from the TGSI register
         * base to a byte offset.
         */
        indirect_offset = qir_SHL(c, indirect_offset, qir_uniform_ui(c, 4));

        /* Adjust for where we stored the TGSI register base. */
        indirect_offset = qir_ADD(c, indirect_offset,
                                  qir_uniform_ui(c, (range->dst_offset +
                                                     offset)));
        indirect_offset = qir_MIN(c, indirect_offset,
                                  qir_uniform_ui(c, (range->dst_offset +
                                                     range->size - 4)));

        qir_TEX_DIRECT(c, indirect_offset, qir_uniform(c, QUNIFORM_UBO_ADDR, 0));
        struct qreg r4 = qir_TEX_RESULT(c);
        c->num_texture_samples++;
        return qir_MOV(c, r4);
}

static struct qreg *
ntq_get_dest(struct vc4_compile *c, nir_dest dest)
{
        assert(!dest.is_ssa);
        nir_register *reg = dest.reg.reg;
        struct hash_entry *entry = _mesa_hash_table_search(c->def_ht, reg);
        assert(reg->num_array_elems == 0);
        assert(dest.reg.base_offset == 0);

        struct qreg *qregs = entry->data;
        return qregs;
}

static struct qreg
ntq_get_src(struct vc4_compile *c, nir_src src, int i)
{
        struct hash_entry *entry;
        if (src.is_ssa) {
                entry = _mesa_hash_table_search(c->def_ht, src.ssa);
                assert(i < src.ssa->num_components);
        } else {
                nir_register *reg = src.reg.reg;
                entry = _mesa_hash_table_search(c->def_ht, reg);
                assert(reg->num_array_elems == 0);
                assert(src.reg.base_offset == 0);
                assert(i < reg->num_components);
        }

        struct qreg *qregs = entry->data;
        return qregs[i];
}

static struct qreg
ntq_get_alu_src(struct vc4_compile *c, nir_alu_instr *instr,
                unsigned src)
{
        assert(util_is_power_of_two(instr->dest.write_mask));
        unsigned chan = ffs(instr->dest.write_mask) - 1;
        struct qreg r = ntq_get_src(c, instr->src[src].src,
                                    instr->src[src].swizzle[chan]);

        assert(!instr->src[src].abs);
        assert(!instr->src[src].negate);

        return r;
};

static struct qreg
get_swizzled_channel(struct vc4_compile *c,
                     struct qreg *srcs, int swiz)
{
        switch (swiz) {
        default:
        case UTIL_FORMAT_SWIZZLE_NONE:
                fprintf(stderr, "warning: unknown swizzle\n");
                /* FALLTHROUGH */
        case UTIL_FORMAT_SWIZZLE_0:
                return qir_uniform_f(c, 0.0);
        case UTIL_FORMAT_SWIZZLE_1:
                return qir_uniform_f(c, 1.0);
        case UTIL_FORMAT_SWIZZLE_X:
        case UTIL_FORMAT_SWIZZLE_Y:
        case UTIL_FORMAT_SWIZZLE_Z:
        case UTIL_FORMAT_SWIZZLE_W:
                return srcs[swiz];
        }
}

static inline struct qreg
qir_SAT(struct vc4_compile *c, struct qreg val)
{
        return qir_FMAX(c,
                        qir_FMIN(c, val, qir_uniform_f(c, 1.0)),
                        qir_uniform_f(c, 0.0));
}

static struct qreg
ntq_rcp(struct vc4_compile *c, struct qreg x)
{
        struct qreg r = qir_RCP(c, x);

        /* Apply a Newton-Raphson step to improve the accuracy. */
        r = qir_FMUL(c, r, qir_FSUB(c,
                                    qir_uniform_f(c, 2.0),
                                    qir_FMUL(c, x, r)));

        return r;
}

static struct qreg
ntq_rsq(struct vc4_compile *c, struct qreg x)
{
        struct qreg r = qir_RSQ(c, x);

        /* Apply a Newton-Raphson step to improve the accuracy. */
        r = qir_FMUL(c, r, qir_FSUB(c,
                                    qir_uniform_f(c, 1.5),
                                    qir_FMUL(c,
                                             qir_uniform_f(c, 0.5),
                                             qir_FMUL(c, x,
                                                      qir_FMUL(c, r, r)))));

        return r;
}

static struct qreg
qir_srgb_decode(struct vc4_compile *c, struct qreg srgb)
{
        struct qreg low = qir_FMUL(c, srgb, qir_uniform_f(c, 1.0 / 12.92));
        struct qreg high = qir_POW(c,
                                   qir_FMUL(c,
                                            qir_FADD(c,
                                                     srgb,
                                                     qir_uniform_f(c, 0.055)),
                                            qir_uniform_f(c, 1.0 / 1.055)),
                                   qir_uniform_f(c, 2.4));

        qir_SF(c, qir_FSUB(c, srgb, qir_uniform_f(c, 0.04045)));
        return qir_SEL_X_Y_NS(c, low, high);
}

static struct qreg
qir_srgb_encode(struct vc4_compile *c, struct qreg linear)
{
        struct qreg low = qir_FMUL(c, linear, qir_uniform_f(c, 12.92));
        struct qreg high = qir_FSUB(c,
                                    qir_FMUL(c,
                                             qir_uniform_f(c, 1.055),
                                             qir_POW(c,
                                                     linear,
                                                     qir_uniform_f(c, 0.41666))),
                                    qir_uniform_f(c, 0.055));

        qir_SF(c, qir_FSUB(c, linear, qir_uniform_f(c, 0.0031308)));
        return qir_SEL_X_Y_NS(c, low, high);
}

static struct qreg
ntq_umul(struct vc4_compile *c, struct qreg src0, struct qreg src1)
{
        struct qreg src0_hi = qir_SHR(c, src0,
                                      qir_uniform_ui(c, 24));
        struct qreg src1_hi = qir_SHR(c, src1,
                                      qir_uniform_ui(c, 24));

        struct qreg hilo = qir_MUL24(c, src0_hi, src1);
        struct qreg lohi = qir_MUL24(c, src0, src1_hi);
        struct qreg lolo = qir_MUL24(c, src0, src1);

        return qir_ADD(c, lolo, qir_SHL(c,
                                        qir_ADD(c, hilo, lohi),
                                        qir_uniform_ui(c, 24)));
}

static struct qreg
ntq_idiv(struct vc4_compile *c, struct qreg src0, struct qreg src1)
{
        return qir_FTOI(c, qir_FMUL(c,
                                    qir_ITOF(c, src0),
                                    qir_RCP(c, qir_ITOF(c, src1))));
}

static void
ntq_emit_tex(struct vc4_compile *c, nir_tex_instr *instr)
{
        struct qreg s, t, r, lod, proj, compare;
        bool is_txb = false, is_txl = false, has_proj = false;
        unsigned unit = instr->sampler_index;

        for (unsigned i = 0; i < instr->num_srcs; i++) {
                switch (instr->src[i].src_type) {
                case nir_tex_src_coord:
                        s = ntq_get_src(c, instr->src[i].src, 0);
                        if (instr->sampler_dim != GLSL_SAMPLER_DIM_1D)
                                t = ntq_get_src(c, instr->src[i].src, 1);
                        if (instr->sampler_dim == GLSL_SAMPLER_DIM_CUBE)
                                r = ntq_get_src(c, instr->src[i].src, 2);
                        break;
                case nir_tex_src_bias:
                        lod = ntq_get_src(c, instr->src[i].src, 0);
                        is_txb = true;
                        break;
                case nir_tex_src_lod:
                        lod = ntq_get_src(c, instr->src[i].src, 0);
                        is_txl = true;
                        break;
                case nir_tex_src_comparitor:
                        compare = ntq_get_src(c, instr->src[i].src, 0);
                        break;
                case nir_tex_src_projector:
                        proj = qir_RCP(c, ntq_get_src(c, instr->src[i].src, 0));
                        s = qir_FMUL(c, s, proj);
                        t = qir_FMUL(c, t, proj);
                        has_proj = true;
                        break;
                default:
                        unreachable("unknown texture source");
                }
        }

        struct qreg texture_u[] = {
                qir_uniform(c, QUNIFORM_TEXTURE_CONFIG_P0, unit),
                qir_uniform(c, QUNIFORM_TEXTURE_CONFIG_P1, unit),
                qir_uniform(c, QUNIFORM_CONSTANT, 0),
                qir_uniform(c, QUNIFORM_CONSTANT, 0),
        };
        uint32_t next_texture_u = 0;

        /* There is no native support for GL texture rectangle coordinates, so
         * we have to rescale from ([0, width], [0, height]) to ([0, 1], [0,
         * 1]).
         */
        if (instr->sampler_dim == GLSL_SAMPLER_DIM_RECT) {
                s = qir_FMUL(c, s,
                             qir_uniform(c, QUNIFORM_TEXRECT_SCALE_X, unit));
                t = qir_FMUL(c, t,
                             qir_uniform(c, QUNIFORM_TEXRECT_SCALE_Y, unit));
        }

        if (instr->sampler_dim == GLSL_SAMPLER_DIM_CUBE || is_txl) {
                texture_u[2] = qir_uniform(c, QUNIFORM_TEXTURE_CONFIG_P2,
                                           unit | (is_txl << 16));
        }

        if (instr->sampler_dim == GLSL_SAMPLER_DIM_CUBE) {
                struct qreg ma = qir_FMAXABS(c, qir_FMAXABS(c, s, t), r);
                struct qreg rcp_ma = qir_RCP(c, ma);
                s = qir_FMUL(c, s, rcp_ma);
                t = qir_FMUL(c, t, rcp_ma);
                r = qir_FMUL(c, r, rcp_ma);

                qir_TEX_R(c, r, texture_u[next_texture_u++]);
        } else if (c->key->tex[unit].wrap_s == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
                   c->key->tex[unit].wrap_s == PIPE_TEX_WRAP_CLAMP ||
                   c->key->tex[unit].wrap_t == PIPE_TEX_WRAP_CLAMP_TO_BORDER ||
                   c->key->tex[unit].wrap_t == PIPE_TEX_WRAP_CLAMP) {
                qir_TEX_R(c, qir_uniform(c, QUNIFORM_TEXTURE_BORDER_COLOR, unit),
                          texture_u[next_texture_u++]);
        }

        if (c->key->tex[unit].wrap_s == PIPE_TEX_WRAP_CLAMP) {
                s = qir_SAT(c, s);
        }

        if (c->key->tex[unit].wrap_t == PIPE_TEX_WRAP_CLAMP) {
                t = qir_SAT(c, t);
        }

        qir_TEX_T(c, t, texture_u[next_texture_u++]);

        if (is_txl || is_txb)
                qir_TEX_B(c, lod, texture_u[next_texture_u++]);

        qir_TEX_S(c, s, texture_u[next_texture_u++]);

        c->num_texture_samples++;
        struct qreg r4 = qir_TEX_RESULT(c);

        enum pipe_format format = c->key->tex[unit].format;

        struct qreg unpacked[4];
        if (util_format_is_depth_or_stencil(format)) {
                struct qreg depthf = qir_ITOF(c, qir_SHR(c, r4,
                                                         qir_uniform_ui(c, 8)));
                struct qreg normalized = qir_FMUL(c, depthf,
                                                  qir_uniform_f(c, 1.0f/0xffffff));

                struct qreg depth_output;

                struct qreg one = qir_uniform_f(c, 1.0f);
                if (c->key->tex[unit].compare_mode) {
                        if (has_proj)
                                compare = qir_FMUL(c, compare, proj);

                        switch (c->key->tex[unit].compare_func) {
                        case PIPE_FUNC_NEVER:
                                depth_output = qir_uniform_f(c, 0.0f);
                                break;
                        case PIPE_FUNC_ALWAYS:
                                depth_output = one;
                                break;
                        case PIPE_FUNC_EQUAL:
                                qir_SF(c, qir_FSUB(c, compare, normalized));
                                depth_output = qir_SEL_X_0_ZS(c, one);
                                break;
                        case PIPE_FUNC_NOTEQUAL:
                                qir_SF(c, qir_FSUB(c, compare, normalized));
                                depth_output = qir_SEL_X_0_ZC(c, one);
                                break;
                        case PIPE_FUNC_GREATER:
                                qir_SF(c, qir_FSUB(c, compare, normalized));
                                depth_output = qir_SEL_X_0_NC(c, one);
                                break;
                        case PIPE_FUNC_GEQUAL:
                                qir_SF(c, qir_FSUB(c, normalized, compare));
                                depth_output = qir_SEL_X_0_NS(c, one);
                                break;
                        case PIPE_FUNC_LESS:
                                qir_SF(c, qir_FSUB(c, compare, normalized));
                                depth_output = qir_SEL_X_0_NS(c, one);
                                break;
                        case PIPE_FUNC_LEQUAL:
                                qir_SF(c, qir_FSUB(c, normalized, compare));
                                depth_output = qir_SEL_X_0_NC(c, one);
                                break;
                        }
                } else {
                        depth_output = normalized;
                }

                for (int i = 0; i < 4; i++)
                        unpacked[i] = depth_output;
        } else {
                for (int i = 0; i < 4; i++)
                        unpacked[i] = qir_R4_UNPACK(c, r4, i);
        }

        const uint8_t *format_swiz = vc4_get_format_swizzle(format);
        struct qreg texture_output[4];
        for (int i = 0; i < 4; i++) {
                texture_output[i] = get_swizzled_channel(c, unpacked,
                                                         format_swiz[i]);
        }

        if (util_format_is_srgb(format)) {
                for (int i = 0; i < 3; i++)
                        texture_output[i] = qir_srgb_decode(c,
                                                            texture_output[i]);
        }

        struct qreg *dest = ntq_get_dest(c, instr->dest);
        for (int i = 0; i < 4; i++) {
                dest[i] = get_swizzled_channel(c, texture_output,
                                               c->key->tex[unit].swizzle[i]);
        }
}

/**
 * Computes x - floor(x), which is tricky because our FTOI truncates (rounds
 * to zero).
 */
static struct qreg
ntq_ffract(struct vc4_compile *c, struct qreg src)
{
        struct qreg trunc = qir_ITOF(c, qir_FTOI(c, src));
        struct qreg diff = qir_FSUB(c, src, trunc);
        qir_SF(c, diff);
        return qir_SEL_X_Y_NS(c,
                              qir_FADD(c, diff, qir_uniform_f(c, 1.0)),
                              diff);
}

/**
 * Computes floor(x), which is tricky because our FTOI truncates (rounds to
 * zero).
 */
static struct qreg
ntq_ffloor(struct vc4_compile *c, struct qreg src)
{
        struct qreg trunc = qir_ITOF(c, qir_FTOI(c, src));

        /* This will be < 0 if we truncated and the truncation was of a value
         * that was < 0 in the first place.
         */
        qir_SF(c, qir_FSUB(c, src, trunc));

        return qir_SEL_X_Y_NS(c,
                              qir_FSUB(c, trunc, qir_uniform_f(c, 1.0)),
                              trunc);
}

/**
 * Computes ceil(x), which is tricky because our FTOI truncates (rounds to
 * zero).
 */
static struct qreg
ntq_fceil(struct vc4_compile *c, struct qreg src)
{
        struct qreg trunc = qir_ITOF(c, qir_FTOI(c, src));

        /* This will be < 0 if we truncated and the truncation was of a value
         * that was > 0 in the first place.
         */
        qir_SF(c, qir_FSUB(c, trunc, src));

        return qir_SEL_X_Y_NS(c,
                              qir_FADD(c, trunc, qir_uniform_f(c, 1.0)),
                              trunc);
}

static struct qreg
ntq_fsin(struct vc4_compile *c, struct qreg src)
{
        float coeff[] = {
                -2.0 * M_PI,
                pow(2.0 * M_PI, 3) / (3 * 2 * 1),
                -pow(2.0 * M_PI, 5) / (5 * 4 * 3 * 2 * 1),
                pow(2.0 * M_PI, 7) / (7 * 6 * 5 * 4 * 3 * 2 * 1),
                -pow(2.0 * M_PI, 9) / (9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1),
        };

        struct qreg scaled_x =
                qir_FMUL(c,
                         src,
                         qir_uniform_f(c, 1.0f / (M_PI * 2.0f)));

        struct qreg x = qir_FADD(c,
                                 ntq_ffract(c, scaled_x),
                                 qir_uniform_f(c, -0.5));
        struct qreg x2 = qir_FMUL(c, x, x);
        struct qreg sum = qir_FMUL(c, x, qir_uniform_f(c, coeff[0]));
        for (int i = 1; i < ARRAY_SIZE(coeff); i++) {
                x = qir_FMUL(c, x, x2);
                sum = qir_FADD(c,
                               sum,
                               qir_FMUL(c,
                                        x,
                                        qir_uniform_f(c, coeff[i])));
        }
        return sum;
}

static struct qreg
ntq_fcos(struct vc4_compile *c, struct qreg src)
{
        float coeff[] = {
                -1.0f,
                pow(2.0 * M_PI, 2) / (2 * 1),
                -pow(2.0 * M_PI, 4) / (4 * 3 * 2 * 1),
                pow(2.0 * M_PI, 6) / (6 * 5 * 4 * 3 * 2 * 1),
                -pow(2.0 * M_PI, 8) / (8 * 7 * 6 * 5 * 4 * 3 * 2 * 1),
                pow(2.0 * M_PI, 10) / (10 * 9 * 8 * 7 * 6 * 5 * 4 * 3 * 2 * 1),
        };

        struct qreg scaled_x =
                qir_FMUL(c, src,
                         qir_uniform_f(c, 1.0f / (M_PI * 2.0f)));
        struct qreg x_frac = qir_FADD(c,
                                      ntq_ffract(c, scaled_x),
                                      qir_uniform_f(c, -0.5));

        struct qreg sum = qir_uniform_f(c, coeff[0]);
        struct qreg x2 = qir_FMUL(c, x_frac, x_frac);
        struct qreg x = x2; /* Current x^2, x^4, or x^6 */
        for (int i = 1; i < ARRAY_SIZE(coeff); i++) {
                if (i != 1)
                        x = qir_FMUL(c, x, x2);

                struct qreg mul = qir_FMUL(c,
                                           x,
                                           qir_uniform_f(c, coeff[i]));
                if (i == 0)
                        sum = mul;
                else
                        sum = qir_FADD(c, sum, mul);
        }
        return sum;
}

static struct qreg
ntq_fsign(struct vc4_compile *c, struct qreg src)
{
        qir_SF(c, src);
        return qir_SEL_X_Y_NC(c,
                              qir_SEL_X_0_ZC(c, qir_uniform_f(c, 1.0)),
                              qir_uniform_f(c, -1.0));
}

static struct qreg
get_channel_from_vpm(struct vc4_compile *c,
                     struct qreg *vpm_reads,
                     uint8_t swiz,
                     const struct util_format_description *desc)
{
        const struct util_format_channel_description *chan =
                &desc->channel[swiz];
        struct qreg temp;

        if (swiz > UTIL_FORMAT_SWIZZLE_W)
                return get_swizzled_channel(c, vpm_reads, swiz);
        else if (chan->size == 32 &&
                 chan->type == UTIL_FORMAT_TYPE_FLOAT) {
                return get_swizzled_channel(c, vpm_reads, swiz);
        } else if (chan->size == 32 &&
                   chan->type == UTIL_FORMAT_TYPE_SIGNED) {
                if (chan->normalized) {
                        return qir_FMUL(c,
                                        qir_ITOF(c, vpm_reads[swiz]),
                                        qir_uniform_f(c,
                                                      1.0 / 0x7fffffff));
                } else {
                        return qir_ITOF(c, vpm_reads[swiz]);
                }
        } else if (chan->size == 8 &&
                   (chan->type == UTIL_FORMAT_TYPE_UNSIGNED ||
                    chan->type == UTIL_FORMAT_TYPE_SIGNED)) {
                struct qreg vpm = vpm_reads[0];
                if (chan->type == UTIL_FORMAT_TYPE_SIGNED) {
                        temp = qir_XOR(c, vpm, qir_uniform_ui(c, 0x80808080));
                        if (chan->normalized) {
                                return qir_FSUB(c, qir_FMUL(c,
                                                            qir_UNPACK_8_F(c, temp, swiz),
                                                            qir_uniform_f(c, 2.0)),
                                                qir_uniform_f(c, 1.0));
                        } else {
                                return qir_FADD(c,
                                                qir_ITOF(c,
                                                         qir_UNPACK_8_I(c, temp,
                                                                        swiz)),
                                                qir_uniform_f(c, -128.0));
                        }
                } else {
                        if (chan->normalized) {
                                return qir_UNPACK_8_F(c, vpm, swiz);
                        } else {
                                return qir_ITOF(c, qir_UNPACK_8_I(c, vpm, swiz));
                        }
                }
        } else if (chan->size == 16 &&
                   (chan->type == UTIL_FORMAT_TYPE_UNSIGNED ||
                    chan->type == UTIL_FORMAT_TYPE_SIGNED)) {
                struct qreg vpm = vpm_reads[swiz / 2];

                /* Note that UNPACK_16F eats a half float, not ints, so we use
                 * UNPACK_16_I for all of these.
                 */
                if (chan->type == UTIL_FORMAT_TYPE_SIGNED) {
                        temp = qir_ITOF(c, qir_UNPACK_16_I(c, vpm, swiz % 2));
                        if (chan->normalized) {
                                return qir_FMUL(c, temp,
                                                qir_uniform_f(c, 1/32768.0f));
                        } else {
                                return temp;
                        }
                } else {
                        /* UNPACK_16I sign-extends, so we have to emit ANDs. */
                        temp = vpm;
                        if (swiz == 1 || swiz == 3)
                                temp = qir_UNPACK_16_I(c, temp, 1);
                        temp = qir_AND(c, temp, qir_uniform_ui(c, 0xffff));
                        temp = qir_ITOF(c, temp);

                        if (chan->normalized) {
                                return qir_FMUL(c, temp,
                                                qir_uniform_f(c, 1 / 65535.0));
                        } else {
                                return temp;
                        }
                }
        } else {
                return c->undef;
        }
}

static void
emit_vertex_input(struct vc4_compile *c, int attr)
{
        enum pipe_format format = c->vs_key->attr_formats[attr];
        uint32_t attr_size = util_format_get_blocksize(format);
        struct qreg vpm_reads[4];

        c->vattr_sizes[attr] = align(attr_size, 4);
        for (int i = 0; i < align(attr_size, 4) / 4; i++) {
                struct qreg vpm = { QFILE_VPM, attr * 4 + i };
                vpm_reads[i] = qir_MOV(c, vpm);
                c->num_inputs++;
        }

        bool format_warned = false;
        const struct util_format_description *desc =
                util_format_description(format);

        for (int i = 0; i < 4; i++) {
                uint8_t swiz = desc->swizzle[i];
                struct qreg result = get_channel_from_vpm(c, vpm_reads,
                                                          swiz, desc);

                if (result.file == QFILE_NULL) {
                        if (!format_warned) {
                                fprintf(stderr,
                                        "vtx element %d unsupported type: %s\n",
                                        attr, util_format_name(format));
                                format_warned = true;
                        }
                        result = qir_uniform_f(c, 0.0);
                }
                c->inputs[attr * 4 + i] = result;
        }
}

static void
emit_fragcoord_input(struct vc4_compile *c, int attr)
{
        c->inputs[attr * 4 + 0] = qir_FRAG_X(c);
        c->inputs[attr * 4 + 1] = qir_FRAG_Y(c);
        c->inputs[attr * 4 + 2] =
                qir_FMUL(c,
                         qir_ITOF(c, qir_FRAG_Z(c)),
                         qir_uniform_f(c, 1.0 / 0xffffff));
        c->inputs[attr * 4 + 3] = qir_RCP(c, qir_FRAG_W(c));
}

static void
emit_point_coord_input(struct vc4_compile *c, int attr)
{
        if (c->point_x.file == QFILE_NULL) {
                c->point_x = qir_uniform_f(c, 0.0);
                c->point_y = qir_uniform_f(c, 0.0);
        }

        c->inputs[attr * 4 + 0] = c->point_x;
        if (c->fs_key->point_coord_upper_left) {
                c->inputs[attr * 4 + 1] = qir_FSUB(c,
                                                   qir_uniform_f(c, 1.0),
                                                   c->point_y);
        } else {
                c->inputs[attr * 4 + 1] = c->point_y;
        }
        c->inputs[attr * 4 + 2] = qir_uniform_f(c, 0.0);
        c->inputs[attr * 4 + 3] = qir_uniform_f(c, 1.0);
}

static struct qreg
emit_fragment_varying(struct vc4_compile *c, uint8_t semantic,
                      uint8_t index, uint8_t swizzle)
{
        uint32_t i = c->num_input_semantics++;
        struct qreg vary = {
                QFILE_VARY,
                i
        };

        if (c->num_input_semantics >= c->input_semantics_array_size) {
                c->input_semantics_array_size =
                        MAX2(4, c->input_semantics_array_size * 2);

                c->input_semantics = reralloc(c, c->input_semantics,
                                              struct vc4_varying_semantic,
                                              c->input_semantics_array_size);
        }

        c->input_semantics[i].semantic = semantic;
        c->input_semantics[i].index = index;
        c->input_semantics[i].swizzle = swizzle;

        return qir_VARY_ADD_C(c, qir_FMUL(c, vary, qir_FRAG_W(c)));
}

static void
emit_fragment_input(struct vc4_compile *c, int attr,
                    unsigned semantic_name, unsigned semantic_index)
{
        for (int i = 0; i < 4; i++) {
                c->inputs[attr * 4 + i] =
                        emit_fragment_varying(c,
                                              semantic_name,
                                              semantic_index,
                                              i);
                c->num_inputs++;
        }
}

static void
emit_face_input(struct vc4_compile *c, int attr)
{
        c->inputs[attr * 4 + 0] = qir_FSUB(c,
                                           qir_uniform_f(c, 1.0),
                                           qir_FMUL(c,
                                                    qir_ITOF(c, qir_FRAG_REV_FLAG(c)),
                                                    qir_uniform_f(c, 2.0)));
        c->inputs[attr * 4 + 1] = qir_uniform_f(c, 0.0);
        c->inputs[attr * 4 + 2] = qir_uniform_f(c, 0.0);
        c->inputs[attr * 4 + 3] = qir_uniform_f(c, 1.0);
}

static void
add_output(struct vc4_compile *c,
           uint32_t decl_offset,
           uint8_t semantic_name,
           uint8_t semantic_index,
           uint8_t semantic_swizzle)
{
        uint32_t old_array_size = c->outputs_array_size;
        resize_qreg_array(c, &c->outputs, &c->outputs_array_size,
                          decl_offset + 1);

        if (old_array_size != c->outputs_array_size) {
                c->output_semantics = reralloc(c,
                                               c->output_semantics,
                                               struct vc4_varying_semantic,
                                               c->outputs_array_size);
        }

        c->output_semantics[decl_offset].semantic = semantic_name;
        c->output_semantics[decl_offset].index = semantic_index;
        c->output_semantics[decl_offset].swizzle = semantic_swizzle;
}

static void
declare_uniform_range(struct vc4_compile *c, uint32_t start, uint32_t size)
{
        unsigned array_id = c->num_uniform_ranges++;
        if (array_id >= c->ubo_ranges_array_size) {
                c->ubo_ranges_array_size = MAX2(c->ubo_ranges_array_size * 2,
                                                array_id + 1);
                c->ubo_ranges = reralloc(c, c->ubo_ranges,
                                         struct vc4_compiler_ubo_range,
                                         c->ubo_ranges_array_size);
        }

        c->ubo_ranges[array_id].dst_offset = 0;
        c->ubo_ranges[array_id].src_offset = start;
        c->ubo_ranges[array_id].size = size;
        c->ubo_ranges[array_id].used = false;
}

static void
ntq_emit_alu(struct vc4_compile *c, nir_alu_instr *instr)
{
        /* Vectors are special in that they have non-scalarized writemasks,
         * and just take the first swizzle channel for each argument in order
         * into each writemask channel.
         */
        if (instr->op == nir_op_vec2 ||
            instr->op == nir_op_vec3 ||
            instr->op == nir_op_vec4) {
                struct qreg srcs[4];
                for (int i = 0; i < nir_op_infos[instr->op].num_inputs; i++)
                        srcs[i] = ntq_get_src(c, instr->src[i].src,
                                              instr->src[i].swizzle[0]);
                struct qreg *dest = ntq_get_dest(c, instr->dest.dest);
                for (int i = 0; i < nir_op_infos[instr->op].num_inputs; i++)
                        dest[i] = srcs[i];
                return;
        }

        /* General case: We can just grab the one used channel per src. */
        struct qreg src[nir_op_infos[instr->op].num_inputs];
        for (int i = 0; i < nir_op_infos[instr->op].num_inputs; i++) {
                src[i] = ntq_get_alu_src(c, instr, i);
        }

        /* Pick the channel to store the output in. */
        assert(!instr->dest.saturate);
        struct qreg *dest = ntq_get_dest(c, instr->dest.dest);
        assert(util_is_power_of_two(instr->dest.write_mask));
        dest += ffs(instr->dest.write_mask) - 1;

        switch (instr->op) {
        case nir_op_fmov:
        case nir_op_imov:
                *dest = qir_MOV(c, src[0]);
                break;
        case nir_op_fmul:
                *dest = qir_FMUL(c, src[0], src[1]);
                break;
        case nir_op_fadd:
                *dest = qir_FADD(c, src[0], src[1]);
                break;
        case nir_op_fsub:
                *dest = qir_FSUB(c, src[0], src[1]);
                break;
        case nir_op_fmin:
                *dest = qir_FMIN(c, src[0], src[1]);
                break;
        case nir_op_fmax:
                *dest = qir_FMAX(c, src[0], src[1]);
                break;
        case nir_op_f2i:
                *dest = qir_FTOI(c, src[0]);
                break;
        case nir_op_i2f:
                *dest = qir_ITOF(c, src[0]);
                break;
        case nir_op_b2f:
                *dest = qir_AND(c, src[0], qir_uniform_f(c, 1.0));
                break;
        case nir_op_iadd:
                *dest = qir_ADD(c, src[0], src[1]);
                break;
        case nir_op_ushr:
                *dest = qir_SHR(c, src[0], src[1]);
                break;
        case nir_op_isub:
                *dest = qir_SUB(c, src[0], src[1]);
                break;
        case nir_op_ishr:
                *dest = qir_ASR(c, src[0], src[1]);
                break;
        case nir_op_ishl:
                *dest = qir_SHL(c, src[0], src[1]);
                break;
        case nir_op_imin:
                *dest = qir_MIN(c, src[0], src[1]);
                break;
        case nir_op_imax:
                *dest = qir_MAX(c, src[0], src[1]);
                break;
        case nir_op_iand:
                *dest = qir_AND(c, src[0], src[1]);
                break;
        case nir_op_ior:
                *dest = qir_OR(c, src[0], src[1]);
                break;
        case nir_op_ixor:
                *dest = qir_XOR(c, src[0], src[1]);
                break;
        case nir_op_inot:
                *dest = qir_NOT(c, src[0]);
                break;

        case nir_op_imul:
                *dest = ntq_umul(c, src[0], src[1]);
                break;
        case nir_op_idiv:
                *dest = ntq_idiv(c, src[0], src[1]);
                break;

        case nir_op_seq:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_ZS(c, qir_uniform_f(c, 1.0));
                break;
        case nir_op_sne:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_ZC(c, qir_uniform_f(c, 1.0));
                break;
        case nir_op_sge:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_NC(c, qir_uniform_f(c, 1.0));
                break;
        case nir_op_slt:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_NS(c, qir_uniform_f(c, 1.0));
                break;
        case nir_op_feq:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_ZS(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_fne:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_ZC(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_fge:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_NC(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_flt:
                qir_SF(c, qir_FSUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_NS(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_ieq:
                qir_SF(c, qir_SUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_ZS(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_ine:
                qir_SF(c, qir_SUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_ZC(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_ige:
                qir_SF(c, qir_SUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_NC(c, qir_uniform_ui(c, ~0));
                break;
        case nir_op_ilt:
                qir_SF(c, qir_SUB(c, src[0], src[1]));
                *dest = qir_SEL_X_0_NS(c, qir_uniform_ui(c, ~0));
                break;

        case nir_op_bcsel:
                qir_SF(c, src[0]);
                *dest = qir_SEL_X_Y_NS(c, src[1], src[2]);
                break;
        case nir_op_fcsel:
                qir_SF(c, src[0]);
                *dest = qir_SEL_X_Y_ZC(c, src[1], src[2]);
                break;

        case nir_op_frcp:
                *dest = ntq_rcp(c, src[0]);
                break;
        case nir_op_frsq:
                *dest = ntq_rsq(c, src[0]);
                break;
        case nir_op_fexp2:
                *dest = qir_EXP2(c, src[0]);
                break;
        case nir_op_flog2:
                *dest = qir_LOG2(c, src[0]);
                break;

        case nir_op_ftrunc:
                *dest = qir_ITOF(c, qir_FTOI(c, src[0]));
                break;
        case nir_op_fceil:
                *dest = ntq_fceil(c, src[0]);
                break;
        case nir_op_ffract:
                *dest = ntq_ffract(c, src[0]);
                break;
        case nir_op_ffloor:
                *dest = ntq_ffloor(c, src[0]);
                break;

        case nir_op_fsin:
                *dest = ntq_fsin(c, src[0]);
                break;
        case nir_op_fcos:
                *dest = ntq_fcos(c, src[0]);
                break;

        case nir_op_fsign:
                *dest = ntq_fsign(c, src[0]);
                break;
        case nir_op_fabs:
                *dest = qir_FMAXABS(c, src[0], src[0]);
                break;

        default:
                fprintf(stderr, "unknown NIR ALU inst: ");
                nir_print_instr(&instr->instr, stderr);
                fprintf(stderr, "\n");
                abort();
        }
}

static struct qreg
vc4_blend_channel(struct vc4_compile *c,
                  struct qreg *dst,
                  struct qreg *src,
                  struct qreg val,
                  unsigned factor,
                  int channel)
{
        switch(factor) {
        case PIPE_BLENDFACTOR_ONE:
                return val;
        case PIPE_BLENDFACTOR_SRC_COLOR:
                return qir_FMUL(c, val, src[channel]);
        case PIPE_BLENDFACTOR_SRC_ALPHA:
                return qir_FMUL(c, val, src[3]);
        case PIPE_BLENDFACTOR_DST_ALPHA:
                return qir_FMUL(c, val, dst[3]);
        case PIPE_BLENDFACTOR_DST_COLOR:
                return qir_FMUL(c, val, dst[channel]);
        case PIPE_BLENDFACTOR_SRC_ALPHA_SATURATE:
                if (channel != 3) {
                        return qir_FMUL(c,
                                        val,
                                        qir_FMIN(c,
                                                 src[3],
                                                 qir_FSUB(c,
                                                          qir_uniform_f(c, 1.0),
                                                          dst[3])));
                } else {
                        return val;
                }
        case PIPE_BLENDFACTOR_CONST_COLOR:
                return qir_FMUL(c, val,
                                qir_uniform(c, QUNIFORM_BLEND_CONST_COLOR,
                                            channel));
        case PIPE_BLENDFACTOR_CONST_ALPHA:
                return qir_FMUL(c, val,
                                qir_uniform(c, QUNIFORM_BLEND_CONST_COLOR, 3));
        case PIPE_BLENDFACTOR_ZERO:
                return qir_uniform_f(c, 0.0);
        case PIPE_BLENDFACTOR_INV_SRC_COLOR:
                return qir_FMUL(c, val, qir_FSUB(c, qir_uniform_f(c, 1.0),
                                                 src[channel]));
        case PIPE_BLENDFACTOR_INV_SRC_ALPHA:
                return qir_FMUL(c, val, qir_FSUB(c, qir_uniform_f(c, 1.0),
                                                 src[3]));
        case PIPE_BLENDFACTOR_INV_DST_ALPHA:
                return qir_FMUL(c, val, qir_FSUB(c, qir_uniform_f(c, 1.0),
                                                 dst[3]));
        case PIPE_BLENDFACTOR_INV_DST_COLOR:
                return qir_FMUL(c, val, qir_FSUB(c, qir_uniform_f(c, 1.0),
                                                 dst[channel]));
        case PIPE_BLENDFACTOR_INV_CONST_COLOR:
                return qir_FMUL(c, val,
                                qir_FSUB(c, qir_uniform_f(c, 1.0),
                                         qir_uniform(c,
                                                     QUNIFORM_BLEND_CONST_COLOR,
                                                     channel)));
        case PIPE_BLENDFACTOR_INV_CONST_ALPHA:
                return qir_FMUL(c, val,
                                qir_FSUB(c, qir_uniform_f(c, 1.0),
                                         qir_uniform(c,
                                                     QUNIFORM_BLEND_CONST_COLOR,
                                                     3)));

        default:
        case PIPE_BLENDFACTOR_SRC1_COLOR:
        case PIPE_BLENDFACTOR_SRC1_ALPHA:
        case PIPE_BLENDFACTOR_INV_SRC1_COLOR:
        case PIPE_BLENDFACTOR_INV_SRC1_ALPHA:
                /* Unsupported. */
                fprintf(stderr, "Unknown blend factor %d\n", factor);
                return val;
        }
}

static struct qreg
vc4_blend_func(struct vc4_compile *c,
               struct qreg src, struct qreg dst,
               unsigned func)
{
        switch (func) {
        case PIPE_BLEND_ADD:
                return qir_FADD(c, src, dst);
        case PIPE_BLEND_SUBTRACT:
                return qir_FSUB(c, src, dst);
        case PIPE_BLEND_REVERSE_SUBTRACT:
                return qir_FSUB(c, dst, src);
        case PIPE_BLEND_MIN:
                return qir_FMIN(c, src, dst);
        case PIPE_BLEND_MAX:
                return qir_FMAX(c, src, dst);

        default:
                /* Unsupported. */
                fprintf(stderr, "Unknown blend func %d\n", func);
                return src;

        }
}

/**
 * Implements fixed function blending in shader code.
 *
 * VC4 doesn't have any hardware support for blending.  Instead, you read the
 * current contents of the destination from the tile buffer after having
 * waited for the scoreboard (which is handled by vc4_qpu_emit.c), then do
 * math using your output color and that destination value, and update the
 * output color appropriately.
 */
static void
vc4_blend(struct vc4_compile *c, struct qreg *result,
          struct qreg *dst_color, struct qreg *src_color)
{
        struct pipe_rt_blend_state *blend = &c->fs_key->blend;

        if (!blend->blend_enable) {
                for (int i = 0; i < 4; i++)
                        result[i] = src_color[i];
                return;
        }

        struct qreg clamped_src[4];
        struct qreg clamped_dst[4];
        for (int i = 0; i < 4; i++) {
                clamped_src[i] = qir_SAT(c, src_color[i]);
                clamped_dst[i] = qir_SAT(c, dst_color[i]);
        }
        src_color = clamped_src;
        dst_color = clamped_dst;

        struct qreg src_blend[4], dst_blend[4];
        for (int i = 0; i < 3; i++) {
                src_blend[i] = vc4_blend_channel(c,
                                                 dst_color, src_color,
                                                 src_color[i],
                                                 blend->rgb_src_factor, i);
                dst_blend[i] = vc4_blend_channel(c,
                                                 dst_color, src_color,
                                                 dst_color[i],
                                                 blend->rgb_dst_factor, i);
        }
        src_blend[3] = vc4_blend_channel(c,
                                         dst_color, src_color,
                                         src_color[3],
                                         blend->alpha_src_factor, 3);
        dst_blend[3] = vc4_blend_channel(c,
                                         dst_color, src_color,
                                         dst_color[3],
                                         blend->alpha_dst_factor, 3);

        for (int i = 0; i < 3; i++) {
                result[i] = vc4_blend_func(c,
                                           src_blend[i], dst_blend[i],
                                           blend->rgb_func);
        }
        result[3] = vc4_blend_func(c,
                                   src_blend[3], dst_blend[3],
                                   blend->alpha_func);
}

static void
clip_distance_discard(struct vc4_compile *c)
{
        for (int i = 0; i < PIPE_MAX_CLIP_PLANES; i++) {
                if (!(c->key->ucp_enables & (1 << i)))
                        continue;

                struct qreg dist = emit_fragment_varying(c,
                                                         TGSI_SEMANTIC_CLIPDIST,
                                                         i,
                                                         TGSI_SWIZZLE_X);

                qir_SF(c, dist);

                if (c->discard.file == QFILE_NULL)
                        c->discard = qir_uniform_ui(c, 0);

                c->discard = qir_SEL_X_Y_NS(c, qir_uniform_ui(c, ~0),
                                            c->discard);
        }
}

static void
alpha_test_discard(struct vc4_compile *c)
{
        struct qreg src_alpha;
        struct qreg alpha_ref = qir_uniform(c, QUNIFORM_ALPHA_REF, 0);

        if (!c->fs_key->alpha_test)
                return;

        if (c->output_color_index != -1)
                src_alpha = c->outputs[c->output_color_index + 3];
        else
                src_alpha = qir_uniform_f(c, 1.0);

        if (c->discard.file == QFILE_NULL)
                c->discard = qir_uniform_ui(c, 0);

        switch (c->fs_key->alpha_test_func) {
        case PIPE_FUNC_NEVER:
                c->discard = qir_uniform_ui(c, ~0);
                break;
        case PIPE_FUNC_ALWAYS:
                break;
        case PIPE_FUNC_EQUAL:
                qir_SF(c, qir_FSUB(c, src_alpha, alpha_ref));
                c->discard = qir_SEL_X_Y_ZS(c, c->discard,
                                            qir_uniform_ui(c, ~0));
                break;
        case PIPE_FUNC_NOTEQUAL:
                qir_SF(c, qir_FSUB(c, src_alpha, alpha_ref));
                c->discard = qir_SEL_X_Y_ZC(c, c->discard,
                                            qir_uniform_ui(c, ~0));
                break;
        case PIPE_FUNC_GREATER:
                qir_SF(c, qir_FSUB(c, src_alpha, alpha_ref));
                c->discard = qir_SEL_X_Y_NC(c, c->discard,
                                            qir_uniform_ui(c, ~0));
                break;
        case PIPE_FUNC_GEQUAL:
                qir_SF(c, qir_FSUB(c, alpha_ref, src_alpha));
                c->discard = qir_SEL_X_Y_NS(c, c->discard,
                                            qir_uniform_ui(c, ~0));
                break;
        case PIPE_FUNC_LESS:
                qir_SF(c, qir_FSUB(c, src_alpha, alpha_ref));
                c->discard = qir_SEL_X_Y_NS(c, c->discard,
                                            qir_uniform_ui(c, ~0));
                break;
        case PIPE_FUNC_LEQUAL:
                qir_SF(c, qir_FSUB(c, alpha_ref, src_alpha));
                c->discard = qir_SEL_X_Y_NC(c, c->discard,
                                            qir_uniform_ui(c, ~0));
                break;
        }
}

static struct qreg
vc4_logicop(struct vc4_compile *c, struct qreg src, struct qreg dst)
{
        switch (c->fs_key->logicop_func) {
        case PIPE_LOGICOP_CLEAR:
                return qir_uniform_f(c, 0.0);
        case PIPE_LOGICOP_NOR:
                return qir_NOT(c, qir_OR(c, src, dst));
        case PIPE_LOGICOP_AND_INVERTED:
                return qir_AND(c, qir_NOT(c, src), dst);
        case PIPE_LOGICOP_COPY_INVERTED:
                return qir_NOT(c, src);
        case PIPE_LOGICOP_AND_REVERSE:
                return qir_AND(c, src, qir_NOT(c, dst));
        case PIPE_LOGICOP_INVERT:
                return qir_NOT(c, dst);
        case PIPE_LOGICOP_XOR:
                return qir_XOR(c, src, dst);
        case PIPE_LOGICOP_NAND:
                return qir_NOT(c, qir_AND(c, src, dst));
        case PIPE_LOGICOP_AND:
                return qir_AND(c, src, dst);
        case PIPE_LOGICOP_EQUIV:
                return qir_NOT(c, qir_XOR(c, src, dst));
        case PIPE_LOGICOP_NOOP:
                return dst;
        case PIPE_LOGICOP_OR_INVERTED:
                return qir_OR(c, qir_NOT(c, src), dst);
        case PIPE_LOGICOP_OR_REVERSE:
                return qir_OR(c, src, qir_NOT(c, dst));
        case PIPE_LOGICOP_OR:
                return qir_OR(c, src, dst);
        case PIPE_LOGICOP_SET:
                return qir_uniform_ui(c, ~0);
        case PIPE_LOGICOP_COPY:
        default:
                return src;
        }
}

static void
emit_frag_end(struct vc4_compile *c)
{
        clip_distance_discard(c);
        alpha_test_discard(c);

        enum pipe_format color_format = c->fs_key->color_format;
        const uint8_t *format_swiz = vc4_get_format_swizzle(color_format);
        struct qreg tlb_read_color[4] = { c->undef, c->undef, c->undef, c->undef };
        struct qreg dst_color[4] = { c->undef, c->undef, c->undef, c->undef };
        struct qreg linear_dst_color[4] = { c->undef, c->undef, c->undef, c->undef };
        struct qreg packed_dst_color = c->undef;

        if (c->fs_key->blend.blend_enable ||
            c->fs_key->blend.colormask != 0xf ||
            c->fs_key->logicop_func != PIPE_LOGICOP_COPY) {
                struct qreg r4 = qir_TLB_COLOR_READ(c);
                for (int i = 0; i < 4; i++)
                        tlb_read_color[i] = qir_R4_UNPACK(c, r4, i);
                for (int i = 0; i < 4; i++) {
                        dst_color[i] = get_swizzled_channel(c,
                                                            tlb_read_color,
                                                            format_swiz[i]);
                        if (util_format_is_srgb(color_format) && i != 3) {
                                linear_dst_color[i] =
                                        qir_srgb_decode(c, dst_color[i]);
                        } else {
                                linear_dst_color[i] = dst_color[i];
                        }
                }

                /* Save the packed value for logic ops.  Can't reuse r4
                 * becuase other things might smash it (like sRGB)
                 */
                packed_dst_color = qir_MOV(c, r4);
        }

        struct qreg blend_color[4];
        struct qreg undef_array[4] = {
                c->undef, c->undef, c->undef, c->undef
        };
        vc4_blend(c, blend_color, linear_dst_color,
                  (c->output_color_index != -1 ?
                   c->outputs + c->output_color_index :
                   undef_array));

        if (util_format_is_srgb(color_format)) {
                for (int i = 0; i < 3; i++)
                        blend_color[i] = qir_srgb_encode(c, blend_color[i]);
        }

        /* Debug: Sometimes you're getting a black output and just want to see
         * if the FS is getting executed at all.  Spam magenta into the color
         * output.
         */
        if (0) {
                blend_color[0] = qir_uniform_f(c, 1.0);
                blend_color[1] = qir_uniform_f(c, 0.0);
                blend_color[2] = qir_uniform_f(c, 1.0);
                blend_color[3] = qir_uniform_f(c, 0.5);
        }

        struct qreg swizzled_outputs[4];
        for (int i = 0; i < 4; i++) {
                swizzled_outputs[i] = get_swizzled_channel(c, blend_color,
                                                           format_swiz[i]);
        }

        if (c->discard.file != QFILE_NULL)
                qir_TLB_DISCARD_SETUP(c, c->discard);

        if (c->fs_key->stencil_enabled) {
                qir_TLB_STENCIL_SETUP(c, qir_uniform(c, QUNIFORM_STENCIL, 0));
                if (c->fs_key->stencil_twoside) {
                        qir_TLB_STENCIL_SETUP(c, qir_uniform(c, QUNIFORM_STENCIL, 1));
                }
                if (c->fs_key->stencil_full_writemasks) {
                        qir_TLB_STENCIL_SETUP(c, qir_uniform(c, QUNIFORM_STENCIL, 2));
                }
        }

        if (c->fs_key->depth_enabled) {
                struct qreg z;
                if (c->output_position_index != -1) {
                        z = qir_FTOI(c, qir_FMUL(c, c->outputs[c->output_position_index + 2],
                                                 qir_uniform_f(c, 0xffffff)));
                } else {
                        z = qir_FRAG_Z(c);
                }
                qir_TLB_Z_WRITE(c, z);
        }

        struct qreg packed_color = c->undef;
        for (int i = 0; i < 4; i++) {
                if (swizzled_outputs[i].file == QFILE_NULL)
                        continue;
                if (packed_color.file == QFILE_NULL) {
                        packed_color = qir_PACK_8888_F(c, swizzled_outputs[i]);
                } else {
                        packed_color = qir_PACK_8_F(c,
                                                    packed_color,
                                                    swizzled_outputs[i],
                                                    i);
                }
        }

        if (packed_color.file == QFILE_NULL)
                packed_color = qir_uniform_ui(c, 0);

        if (c->fs_key->logicop_func != PIPE_LOGICOP_COPY) {
                packed_color = vc4_logicop(c, packed_color, packed_dst_color);
        }

        /* If the bit isn't set in the color mask, then just return the
         * original dst color, instead.
         */
        uint32_t colormask = 0xffffffff;
        for (int i = 0; i < 4; i++) {
                if (format_swiz[i] < 4 &&
                    !(c->fs_key->blend.colormask & (1 << format_swiz[i]))) {
                        colormask &= ~(0xff << (i * 8));
                }
        }
        if (colormask != 0xffffffff) {
                packed_color = qir_OR(c,
                                      qir_AND(c, packed_color,
                                              qir_uniform_ui(c, colormask)),
                                      qir_AND(c, packed_dst_color,
                                              qir_uniform_ui(c, ~colormask)));
        }

        qir_emit(c, qir_inst(QOP_TLB_COLOR_WRITE, c->undef,
                             packed_color, c->undef));
}

static void
emit_scaled_viewport_write(struct vc4_compile *c, struct qreg rcp_w)
{
        struct qreg xyi[2];

        for (int i = 0; i < 2; i++) {
                struct qreg scale =
                        qir_uniform(c, QUNIFORM_VIEWPORT_X_SCALE + i, 0);

                xyi[i] = qir_FTOI(c, qir_FMUL(c,
                                              qir_FMUL(c,
                                                       c->outputs[c->output_position_index + i],
                                                       scale),
                                              rcp_w));
        }

        qir_VPM_WRITE(c, qir_PACK_SCALED(c, xyi[0], xyi[1]));
}

static void
emit_zs_write(struct vc4_compile *c, struct qreg rcp_w)
{
        struct qreg zscale = qir_uniform(c, QUNIFORM_VIEWPORT_Z_SCALE, 0);
        struct qreg zoffset = qir_uniform(c, QUNIFORM_VIEWPORT_Z_OFFSET, 0);

        qir_VPM_WRITE(c, qir_FADD(c, qir_FMUL(c, qir_FMUL(c,
                                                          c->outputs[c->output_position_index + 2],
                                                          zscale),
                                              rcp_w),
                                  zoffset));
}

static void
emit_rcp_wc_write(struct vc4_compile *c, struct qreg rcp_w)
{
        qir_VPM_WRITE(c, rcp_w);
}

static void
emit_point_size_write(struct vc4_compile *c)
{
        struct qreg point_size;

        if (c->output_point_size_index != -1)
                point_size = c->outputs[c->output_point_size_index + 3];
        else
                point_size = qir_uniform_f(c, 1.0);

        /* Workaround: HW-2726 PTB does not handle zero-size points (BCM2835,
         * BCM21553).
         */
        point_size = qir_FMAX(c, point_size, qir_uniform_f(c, .125));

        qir_VPM_WRITE(c, point_size);
}

/**
 * Emits a VPM read of the stub vertex attribute set up by vc4_draw.c.
 *
 * The simulator insists that there be at least one vertex attribute, so
 * vc4_draw.c will emit one if it wouldn't have otherwise.  The simulator also
 * insists that all vertex attributes loaded get read by the VS/CS, so we have
 * to consume it here.
 */
static void
emit_stub_vpm_read(struct vc4_compile *c)
{
        if (c->num_inputs)
                return;

        c->vattr_sizes[0] = 4;
        struct qreg vpm = { QFILE_VPM, 0 };
        (void)qir_MOV(c, vpm);
        c->num_inputs++;
}

static void
emit_ucp_clipdistance(struct vc4_compile *c)
{
        unsigned cv;
        if (c->output_clipvertex_index != -1)
                cv = c->output_clipvertex_index;
        else if (c->output_position_index != -1)
                cv = c->output_position_index;
        else
                return;

        for (int plane = 0; plane < PIPE_MAX_CLIP_PLANES; plane++) {
                if (!(c->key->ucp_enables & (1 << plane)))
                        continue;

                /* Pick the next outputs[] that hasn't been written to, since
                 * there are no other program writes left to be processed at
                 * this point.  If something had been declared but not written
                 * (like a w component), we'll just smash over the top of it.
                 */
                uint32_t output_index = c->num_outputs++;
                add_output(c, output_index,
                           TGSI_SEMANTIC_CLIPDIST,
                           plane,
                           TGSI_SWIZZLE_X);


                struct qreg dist = qir_uniform_f(c, 0.0);
                for (int i = 0; i < 4; i++) {
                        struct qreg pos_chan = c->outputs[cv + i];
                        struct qreg ucp =
                                qir_uniform(c, QUNIFORM_USER_CLIP_PLANE,
                                            plane * 4 + i);
                        dist = qir_FADD(c, dist, qir_FMUL(c, pos_chan, ucp));
                }

                c->outputs[output_index] = dist;
        }
}

static void
emit_vert_end(struct vc4_compile *c,
              struct vc4_varying_semantic *fs_inputs,
              uint32_t num_fs_inputs)
{
        struct qreg rcp_w = qir_RCP(c, c->outputs[c->output_position_index + 3]);

        emit_stub_vpm_read(c);
        emit_ucp_clipdistance(c);

        emit_scaled_viewport_write(c, rcp_w);
        emit_zs_write(c, rcp_w);
        emit_rcp_wc_write(c, rcp_w);
        if (c->vs_key->per_vertex_point_size)
                emit_point_size_write(c);

        for (int i = 0; i < num_fs_inputs; i++) {
                struct vc4_varying_semantic *input = &fs_inputs[i];
                int j;

                for (j = 0; j < c->num_outputs; j++) {
                        struct vc4_varying_semantic *output =
                                &c->output_semantics[j];

                        if (input->semantic == output->semantic &&
                            input->index == output->index &&
                            input->swizzle == output->swizzle) {
                                qir_VPM_WRITE(c, c->outputs[j]);
                                break;
                        }
                }
                /* Emit padding if we didn't find a declared VS output for
                 * this FS input.
                 */
                if (j == c->num_outputs)
                        qir_VPM_WRITE(c, qir_uniform_f(c, 0.0));
        }
}

static void
emit_coord_end(struct vc4_compile *c)
{
        struct qreg rcp_w = qir_RCP(c, c->outputs[c->output_position_index + 3]);

        emit_stub_vpm_read(c);

        for (int i = 0; i < 4; i++)
                qir_VPM_WRITE(c, c->outputs[c->output_position_index + i]);

        emit_scaled_viewport_write(c, rcp_w);
        emit_zs_write(c, rcp_w);
        emit_rcp_wc_write(c, rcp_w);
        if (c->vs_key->per_vertex_point_size)
                emit_point_size_write(c);
}

static void
vc4_optimize_nir(struct nir_shader *s)
{
        bool progress;

        do {
                progress = false;

                nir_lower_vars_to_ssa(s);
                nir_lower_alu_to_scalar(s);

                progress = nir_copy_prop(s) || progress;
                progress = nir_opt_dce(s) || progress;
                progress = nir_opt_cse(s) || progress;
                progress = nir_opt_peephole_select(s) || progress;
                progress = nir_opt_algebraic(s) || progress;
                progress = nir_opt_constant_folding(s) || progress;
        } while (progress);
}

static int
driver_location_compare(const void *in_a, const void *in_b)
{
        const nir_variable *const *a = in_a;
        const nir_variable *const *b = in_b;

        return (*a)->data.driver_location - (*b)->data.driver_location;
}

static void
ntq_setup_inputs(struct vc4_compile *c)
{
        unsigned num_entries = 0;
        foreach_list_typed(nir_variable, var, node, &c->s->inputs)
                num_entries++;

        nir_variable *vars[num_entries];

        unsigned i = 0;
        foreach_list_typed(nir_variable, var, node, &c->s->inputs)
                vars[i++] = var;

        /* Sort the variables so that we emit the input setup in
         * driver_location order.  This is required for VPM reads, whose data
         * is fetched into the VPM in driver_location (TGSI register index)
         * order.
         */
        qsort(&vars, num_entries, sizeof(*vars), driver_location_compare);

        for (unsigned i = 0; i < num_entries; i++) {
                nir_variable *var = vars[i];
                unsigned array_len = MAX2(glsl_get_length(var->type), 1);
                /* XXX: map loc slots to semantics */
                unsigned semantic_name = var->data.location;
                unsigned semantic_index = var->data.index;
                unsigned loc = var->data.driver_location;

                assert(array_len == 1);
                resize_qreg_array(c, &c->inputs, &c->inputs_array_size,
                                  (loc + 1) * 4);

                if (c->stage == QSTAGE_FRAG) {
                        if (semantic_name == TGSI_SEMANTIC_POSITION) {
                                emit_fragcoord_input(c, loc);
                        } else if (semantic_name == TGSI_SEMANTIC_FACE) {
                                emit_face_input(c, loc);
                        } else if (semantic_name == TGSI_SEMANTIC_GENERIC &&
                                   (c->fs_key->point_sprite_mask &
                                    (1 << semantic_index))) {
                                emit_point_coord_input(c, loc);
                        } else {
                                emit_fragment_input(c, loc,
                                                    semantic_name,
                                                    semantic_index);
                        }
                } else {
                        emit_vertex_input(c, loc);
                }
        }
}

static void
ntq_setup_outputs(struct vc4_compile *c)
{
        foreach_list_typed(nir_variable, var, node, &c->s->outputs) {
                unsigned array_len = MAX2(glsl_get_length(var->type), 1);
                /* XXX: map loc slots to semantics */
                unsigned semantic_name = var->data.location;
                unsigned semantic_index = var->data.index;
                unsigned loc = var->data.driver_location * 4;

                assert(array_len == 1);

                for (int i = 0; i < 4; i++) {
                        add_output(c,
                                   loc + i,
                                   semantic_name,
                                   semantic_index,
                                   i);
                }

                switch (semantic_name) {
                case TGSI_SEMANTIC_POSITION:
                        c->output_position_index = loc;
                        break;
                case TGSI_SEMANTIC_CLIPVERTEX:
                        c->output_clipvertex_index = loc;
                        break;
                case TGSI_SEMANTIC_COLOR:
                        c->output_color_index = loc;
                        break;
                case TGSI_SEMANTIC_PSIZE:
                        c->output_point_size_index = loc;
                        break;
                }

        }
}

static void
ntq_setup_uniforms(struct vc4_compile *c)
{
        foreach_list_typed(nir_variable, var, node, &c->s->uniforms) {
                unsigned array_len = MAX2(glsl_get_length(var->type), 1);
                unsigned array_elem_size = 4 * sizeof(float);

                declare_uniform_range(c, var->data.driver_location * array_elem_size,
                                      array_len * array_elem_size);

        }
}

/**
 * Sets up the mapping from nir_register to struct qreg *.
 *
 * Each nir_register gets a struct qreg per 32-bit component being stored.
 */
static void
ntq_setup_registers(struct vc4_compile *c, struct exec_list *list)
{
        foreach_list_typed(nir_register, nir_reg, node, list) {
                unsigned array_len = MAX2(nir_reg->num_array_elems, 1);
                struct qreg *qregs = ralloc_array(c->def_ht, struct qreg,
                                                  array_len *
                                                  nir_reg->num_components);

                _mesa_hash_table_insert(c->def_ht, nir_reg, qregs);

                for (int i = 0; i < array_len * nir_reg->num_components; i++)
                        qregs[i] = qir_uniform_ui(c, 0);
        }
}

static void
ntq_emit_load_const(struct vc4_compile *c, nir_load_const_instr *instr)
{
        struct qreg *qregs = ralloc_array(c->def_ht, struct qreg,
                                          instr->def.num_components);
        for (int i = 0; i < instr->def.num_components; i++)
                qregs[i] = qir_uniform_ui(c, instr->value.u[i]);

        _mesa_hash_table_insert(c->def_ht, &instr->def, qregs);
}

static void
ntq_emit_intrinsic(struct vc4_compile *c, nir_intrinsic_instr *instr)
{
        const nir_intrinsic_info *info = &nir_intrinsic_infos[instr->intrinsic];
        struct qreg *dest = NULL;

        if (info->has_dest) {
                dest = ntq_get_dest(c, instr->dest);
        }

        switch (instr->intrinsic) {
        case nir_intrinsic_load_uniform:
                assert(instr->const_index[1] == 1);

                for (int i = 0; i < instr->num_components; i++) {
                        dest[i] = qir_uniform(c, QUNIFORM_UNIFORM,
                                              instr->const_index[0] * 4 + i);
                }
                break;

        case nir_intrinsic_load_uniform_indirect:
                assert(instr->const_index[1] == 1);

                for (int i = 0; i < instr->num_components; i++) {
                        dest[i] = indirect_uniform_load(c,
                                                        ntq_get_src(c, instr->src[0], 0),
                                                        (instr->const_index[0] *
                                                         4 + i) * sizeof(float));
                }

                break;

        case nir_intrinsic_load_input:
                assert(instr->const_index[1] == 1);

                for (int i = 0; i < instr->num_components; i++)
                        dest[i] = c->inputs[instr->const_index[0] * 4 + i];

                break;

        case nir_intrinsic_store_output:
                for (int i = 0; i < instr->num_components; i++) {
                        c->outputs[instr->const_index[0] * 4 + i] =
                                qir_MOV(c, ntq_get_src(c, instr->src[0], i));
                }
                c->num_outputs = MAX2(c->num_outputs,
                                      instr->const_index[0] * 4 +
                                      instr->num_components + 1);
                break;

        case nir_intrinsic_discard:
                c->discard = qir_uniform_ui(c, ~0);
                break;

        case nir_intrinsic_discard_if:
                if (c->discard.file == QFILE_NULL)
                        c->discard = qir_uniform_ui(c, 0);
                c->discard = qir_OR(c, c->discard,
                                    ntq_get_src(c, instr->src[0], 0));
                break;

        default:
                fprintf(stderr, "Unknown intrinsic: ");
                nir_print_instr(&instr->instr, stderr);
                fprintf(stderr, "\n");
                break;
        }
}

static void
ntq_emit_if(struct vc4_compile *c, nir_if *if_stmt)
{
        fprintf(stderr, "general IF statements not handled.\n");
}

static void
ntq_emit_instr(struct vc4_compile *c, nir_instr *instr)
{
        switch (instr->type) {
        case nir_instr_type_alu:
                ntq_emit_alu(c, nir_instr_as_alu(instr));
                break;

        case nir_instr_type_intrinsic:
                ntq_emit_intrinsic(c, nir_instr_as_intrinsic(instr));
                break;

        case nir_instr_type_load_const:
                ntq_emit_load_const(c, nir_instr_as_load_const(instr));
                break;

        case nir_instr_type_tex:
                ntq_emit_tex(c, nir_instr_as_tex(instr));
                break;

        default:
                fprintf(stderr, "Unknown NIR instr type: ");
                nir_print_instr(instr, stderr);
                fprintf(stderr, "\n");
                abort();
        }
}

static void
ntq_emit_block(struct vc4_compile *c, nir_block *block)
{
        nir_foreach_instr(block, instr) {
                ntq_emit_instr(c, instr);
        }
}

static void
ntq_emit_cf_list(struct vc4_compile *c, struct exec_list *list)
{
        foreach_list_typed(nir_cf_node, node, node, list) {
                switch (node->type) {
                        /* case nir_cf_node_loop: */
                case nir_cf_node_block:
                        ntq_emit_block(c, nir_cf_node_as_block(node));
                        break;

                case nir_cf_node_if:
                        ntq_emit_if(c, nir_cf_node_as_if(node));
                        break;

                default:
                        assert(0);
                }
        }
}

static void
ntq_emit_impl(struct vc4_compile *c, nir_function_impl *impl)
{
        ntq_setup_registers(c, &impl->registers);
        ntq_emit_cf_list(c, &impl->body);
}

static void
nir_to_qir(struct vc4_compile *c)
{
        ntq_setup_inputs(c);
        ntq_setup_outputs(c);
        ntq_setup_uniforms(c);
        ntq_setup_registers(c, &c->s->registers);

        /* Find the main function and emit the body. */
        nir_foreach_overload(c->s, overload) {
                assert(strcmp(overload->function->name, "main") == 0);
                assert(overload->impl);
                ntq_emit_impl(c, overload->impl);
        }
}

static const nir_shader_compiler_options nir_options = {
        .lower_ffma = true,
        .lower_flrp = true,
        .lower_fpow = true,
        .lower_fsat = true,
        .lower_fsqrt = true,
        .lower_negate = true,
};

static bool
count_nir_instrs_in_block(nir_block *block, void *state)
{
        int *count = (int *) state;
        nir_foreach_instr(block, instr) {
                *count = *count + 1;
        }
        return true;
}

static int
count_nir_instrs(nir_shader *nir)
{
        int count = 0;
        nir_foreach_overload(nir, overload) {
                if (!overload->impl)
                        continue;
                nir_foreach_block(overload->impl, count_nir_instrs_in_block, &count);
        }
        return count;
}

static struct vc4_compile *
vc4_shader_ntq(struct vc4_context *vc4, enum qstage stage,
                       struct vc4_key *key)
{
        struct vc4_compile *c = qir_compile_init();

        c->stage = stage;
        c->shader_state = &key->shader_state->base;
        c->program_id = key->shader_state->program_id;
        c->variant_id = key->shader_state->compiled_variant_count++;

        c->key = key;
        switch (stage) {
        case QSTAGE_FRAG:
                c->fs_key = (struct vc4_fs_key *)key;
                if (c->fs_key->is_points) {
                        c->point_x = emit_fragment_varying(c, ~0, ~0, 0);
                        c->point_y = emit_fragment_varying(c, ~0, ~0, 0);
                } else if (c->fs_key->is_lines) {
                        c->line_x = emit_fragment_varying(c, ~0, ~0, 0);
                }
                break;
        case QSTAGE_VERT:
                c->vs_key = (struct vc4_vs_key *)key;
                break;
        case QSTAGE_COORD:
                c->vs_key = (struct vc4_vs_key *)key;
                break;
        }

        const struct tgsi_token *tokens = key->shader_state->base.tokens;
        if (c->fs_key && c->fs_key->light_twoside) {
                if (!key->shader_state->twoside_tokens) {
                        const struct tgsi_lowering_config lowering_config = {
                                .color_two_side = true,
                        };
                        struct tgsi_shader_info info;
                        key->shader_state->twoside_tokens =
                                tgsi_transform_lowering(&lowering_config,
                                                        key->shader_state->base.tokens,
                                                        &info);

                        /* If no transformation occurred, then NULL is
                         * returned and we just use our original tokens.
                         */
                        if (!key->shader_state->twoside_tokens) {
                                key->shader_state->twoside_tokens =
                                        key->shader_state->base.tokens;
                        }
                }
                tokens = key->shader_state->twoside_tokens;
        }

        if (vc4_debug & VC4_DEBUG_TGSI) {
                fprintf(stderr, "%s prog %d/%d TGSI:\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id);
                tgsi_dump(tokens, 0);
        }

        c->s = tgsi_to_nir(tokens, &nir_options);
        nir_opt_global_to_local(c->s);
        nir_convert_to_ssa(c->s);

        vc4_optimize_nir(c->s);

        nir_remove_dead_variables(c->s);

        nir_convert_from_ssa(c->s);

        if (vc4_debug & VC4_DEBUG_SHADERDB) {
                fprintf(stderr, "SHADER-DB: %s prog %d/%d: %d NIR instructions\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id,
                        count_nir_instrs(c->s));
        }

        if (vc4_debug & VC4_DEBUG_NIR) {
                fprintf(stderr, "%s prog %d/%d NIR:\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id);
                nir_print_shader(c->s, stderr);
        }

        nir_to_qir(c);

        switch (stage) {
        case QSTAGE_FRAG:
                emit_frag_end(c);
                break;
        case QSTAGE_VERT:
                emit_vert_end(c,
                              vc4->prog.fs->input_semantics,
                              vc4->prog.fs->num_inputs);
                break;
        case QSTAGE_COORD:
                emit_coord_end(c);
                break;
        }

        if (vc4_debug & VC4_DEBUG_QIR) {
                fprintf(stderr, "%s prog %d/%d pre-opt QIR:\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id);
                qir_dump(c);
        }

        qir_optimize(c);
        qir_lower_uniforms(c);

        if (vc4_debug & VC4_DEBUG_QIR) {
                fprintf(stderr, "%s prog %d/%d QIR:\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id);
                qir_dump(c);
        }
        qir_reorder_uniforms(c);
        vc4_generate_code(vc4, c);

        if (vc4_debug & VC4_DEBUG_SHADERDB) {
                fprintf(stderr, "SHADER-DB: %s prog %d/%d: %d instructions\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id,
                        c->qpu_inst_count);
                fprintf(stderr, "SHADER-DB: %s prog %d/%d: %d uniforms\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id,
                        c->num_uniforms);
        }

        ralloc_free(c->s);

        return c;
}

static void *
vc4_shader_state_create(struct pipe_context *pctx,
                        const struct pipe_shader_state *cso)
{
        struct vc4_context *vc4 = vc4_context(pctx);
        struct vc4_uncompiled_shader *so = CALLOC_STRUCT(vc4_uncompiled_shader);
        if (!so)
                return NULL;

        so->base.tokens = tgsi_dup_tokens(cso->tokens);
        so->program_id = vc4->next_uncompiled_program_id++;

        return so;
}

static void
copy_uniform_state_to_shader(struct vc4_compiled_shader *shader,
                             struct vc4_compile *c)
{
        int count = c->num_uniforms;
        struct vc4_shader_uniform_info *uinfo = &shader->uniforms;

        uinfo->count = count;
        uinfo->data = ralloc_array(shader, uint32_t, count);
        memcpy(uinfo->data, c->uniform_data,
               count * sizeof(*uinfo->data));
        uinfo->contents = ralloc_array(shader, enum quniform_contents, count);
        memcpy(uinfo->contents, c->uniform_contents,
               count * sizeof(*uinfo->contents));
        uinfo->num_texture_samples = c->num_texture_samples;
}

static struct vc4_compiled_shader *
vc4_get_compiled_shader(struct vc4_context *vc4, enum qstage stage,
                        struct vc4_key *key)
{
        struct hash_table *ht;
        uint32_t key_size;
        if (stage == QSTAGE_FRAG) {
                ht = vc4->fs_cache;
                key_size = sizeof(struct vc4_fs_key);
        } else {
                ht = vc4->vs_cache;
                key_size = sizeof(struct vc4_vs_key);
        }

        struct vc4_compiled_shader *shader;
        struct hash_entry *entry = _mesa_hash_table_search(ht, key);
        if (entry)
                return entry->data;

        struct vc4_compile *c = vc4_shader_ntq(vc4, stage, key);
        shader = rzalloc(NULL, struct vc4_compiled_shader);

        shader->program_id = vc4->next_compiled_program_id++;
        if (stage == QSTAGE_FRAG) {
                bool input_live[c->num_input_semantics];
                struct simple_node *node;

                memset(input_live, 0, sizeof(input_live));
                foreach(node, &c->instructions) {
                        struct qinst *inst = (struct qinst *)node;
                        for (int i = 0; i < qir_get_op_nsrc(inst->op); i++) {
                                if (inst->src[i].file == QFILE_VARY)
                                        input_live[inst->src[i].index] = true;
                        }
                }

                shader->input_semantics = ralloc_array(shader,
                                                       struct vc4_varying_semantic,
                                                       c->num_input_semantics);

                for (int i = 0; i < c->num_input_semantics; i++) {
                        struct vc4_varying_semantic *sem = &c->input_semantics[i];

                        if (!input_live[i])
                                continue;

                        /* Skip non-VS-output inputs. */
                        if (sem->semantic == (uint8_t)~0)
                                continue;

                        if (sem->semantic == TGSI_SEMANTIC_COLOR ||
                            sem->semantic == TGSI_SEMANTIC_BCOLOR) {
                                shader->color_inputs |= (1 << shader->num_inputs);
                        }

                        shader->input_semantics[shader->num_inputs] = *sem;
                        shader->num_inputs++;
                }
        } else {
                shader->num_inputs = c->num_inputs;

                shader->vattr_offsets[0] = 0;
                for (int i = 0; i < 8; i++) {
                        shader->vattr_offsets[i + 1] =
                                shader->vattr_offsets[i] + c->vattr_sizes[i];

                        if (c->vattr_sizes[i])
                                shader->vattrs_live |= (1 << i);
                }
        }

        copy_uniform_state_to_shader(shader, c);
        shader->bo = vc4_bo_alloc_mem(vc4->screen, c->qpu_insts,
                                      c->qpu_inst_count * sizeof(uint64_t),
                                      "code");

        /* Copy the compiler UBO range state to the compiled shader, dropping
         * out arrays that were never referenced by an indirect load.
         *
         * (Note that QIR dead code elimination of an array access still
         * leaves that array alive, though)
         */
        if (c->num_ubo_ranges) {
                shader->num_ubo_ranges = c->num_ubo_ranges;
                shader->ubo_ranges = ralloc_array(shader, struct vc4_ubo_range,
                                                  c->num_ubo_ranges);
                uint32_t j = 0;
                for (int i = 0; i < c->num_uniform_ranges; i++) {
                        struct vc4_compiler_ubo_range *range =
                                &c->ubo_ranges[i];
                        if (!range->used)
                                continue;

                        shader->ubo_ranges[j].dst_offset = range->dst_offset;
                        shader->ubo_ranges[j].src_offset = range->src_offset;
                        shader->ubo_ranges[j].size = range->size;
                        shader->ubo_size += c->ubo_ranges[i].size;
                        j++;
                }
        }
        if (shader->ubo_size) {
                fprintf(stderr, "SHADER-DB: %s prog %d/%d: %d UBO uniforms\n",
                        qir_get_stage_name(c->stage),
                        c->program_id, c->variant_id,
                        shader->ubo_size / 4);
        }

        qir_compile_destroy(c);

        struct vc4_key *dup_key;
        dup_key = ralloc_size(shader, key_size);
        memcpy(dup_key, key, key_size);
        _mesa_hash_table_insert(ht, dup_key, shader);

        return shader;
}

static void
vc4_setup_shared_key(struct vc4_context *vc4, struct vc4_key *key,
                     struct vc4_texture_stateobj *texstate)
{
        for (int i = 0; i < texstate->num_textures; i++) {
                struct pipe_sampler_view *sampler = texstate->textures[i];
                struct pipe_sampler_state *sampler_state =
                        texstate->samplers[i];

                if (sampler) {
                        key->tex[i].format = sampler->format;
                        key->tex[i].swizzle[0] = sampler->swizzle_r;
                        key->tex[i].swizzle[1] = sampler->swizzle_g;
                        key->tex[i].swizzle[2] = sampler->swizzle_b;
                        key->tex[i].swizzle[3] = sampler->swizzle_a;
                        key->tex[i].compare_mode = sampler_state->compare_mode;
                        key->tex[i].compare_func = sampler_state->compare_func;
                        key->tex[i].wrap_s = sampler_state->wrap_s;
                        key->tex[i].wrap_t = sampler_state->wrap_t;
                }
        }

        key->ucp_enables = vc4->rasterizer->base.clip_plane_enable;
}

static void
vc4_update_compiled_fs(struct vc4_context *vc4, uint8_t prim_mode)
{
        struct vc4_fs_key local_key;
        struct vc4_fs_key *key = &local_key;

        if (!(vc4->dirty & (VC4_DIRTY_PRIM_MODE |
                            VC4_DIRTY_BLEND |
                            VC4_DIRTY_FRAMEBUFFER |
                            VC4_DIRTY_ZSA |
                            VC4_DIRTY_RASTERIZER |
                            VC4_DIRTY_FRAGTEX |
                            VC4_DIRTY_TEXSTATE |
                            VC4_DIRTY_UNCOMPILED_FS))) {
                return;
        }

        memset(key, 0, sizeof(*key));
        vc4_setup_shared_key(vc4, &key->base, &vc4->fragtex);
        key->base.shader_state = vc4->prog.bind_fs;
        key->is_points = (prim_mode == PIPE_PRIM_POINTS);
        key->is_lines = (prim_mode >= PIPE_PRIM_LINES &&
                         prim_mode <= PIPE_PRIM_LINE_STRIP);
        key->blend = vc4->blend->rt[0];
        if (vc4->blend->logicop_enable) {
                key->logicop_func = vc4->blend->logicop_func;
        } else {
                key->logicop_func = PIPE_LOGICOP_COPY;
        }
        if (vc4->framebuffer.cbufs[0])
                key->color_format = vc4->framebuffer.cbufs[0]->format;

        key->stencil_enabled = vc4->zsa->stencil_uniforms[0] != 0;
        key->stencil_twoside = vc4->zsa->stencil_uniforms[1] != 0;
        key->stencil_full_writemasks = vc4->zsa->stencil_uniforms[2] != 0;
        key->depth_enabled = (vc4->zsa->base.depth.enabled ||
                              key->stencil_enabled);
        if (vc4->zsa->base.alpha.enabled) {
                key->alpha_test = true;
                key->alpha_test_func = vc4->zsa->base.alpha.func;
        }

        if (key->is_points) {
                key->point_sprite_mask =
                        vc4->rasterizer->base.sprite_coord_enable;
                key->point_coord_upper_left =
                        (vc4->rasterizer->base.sprite_coord_mode ==
                         PIPE_SPRITE_COORD_UPPER_LEFT);
        }

        key->light_twoside = vc4->rasterizer->base.light_twoside;

        struct vc4_compiled_shader *old_fs = vc4->prog.fs;
        vc4->prog.fs = vc4_get_compiled_shader(vc4, QSTAGE_FRAG, &key->base);
        if (vc4->prog.fs == old_fs)
                return;

        vc4->dirty |= VC4_DIRTY_COMPILED_FS;
        if (vc4->rasterizer->base.flatshade &&
            old_fs && vc4->prog.fs->color_inputs != old_fs->color_inputs) {
                vc4->dirty |= VC4_DIRTY_FLAT_SHADE_FLAGS;
        }
}

static void
vc4_update_compiled_vs(struct vc4_context *vc4, uint8_t prim_mode)
{
        struct vc4_vs_key local_key;
        struct vc4_vs_key *key = &local_key;

        if (!(vc4->dirty & (VC4_DIRTY_PRIM_MODE |
                            VC4_DIRTY_RASTERIZER |
                            VC4_DIRTY_VERTTEX |
                            VC4_DIRTY_TEXSTATE |
                            VC4_DIRTY_VTXSTATE |
                            VC4_DIRTY_UNCOMPILED_VS |
                            VC4_DIRTY_COMPILED_FS))) {
                return;
        }

        memset(key, 0, sizeof(*key));
        vc4_setup_shared_key(vc4, &key->base, &vc4->verttex);
        key->base.shader_state = vc4->prog.bind_vs;
        key->compiled_fs_id = vc4->prog.fs->program_id;

        for (int i = 0; i < ARRAY_SIZE(key->attr_formats); i++)
                key->attr_formats[i] = vc4->vtx->pipe[i].src_format;

        key->per_vertex_point_size =
                (prim_mode == PIPE_PRIM_POINTS &&
                 vc4->rasterizer->base.point_size_per_vertex);

        vc4->prog.vs = vc4_get_compiled_shader(vc4, QSTAGE_VERT, &key->base);
        key->is_coord = true;
        vc4->prog.cs = vc4_get_compiled_shader(vc4, QSTAGE_COORD, &key->base);
}

void
vc4_update_compiled_shaders(struct vc4_context *vc4, uint8_t prim_mode)
{
        vc4_update_compiled_fs(vc4, prim_mode);
        vc4_update_compiled_vs(vc4, prim_mode);
}

static uint32_t
fs_cache_hash(const void *key)
{
        return _mesa_hash_data(key, sizeof(struct vc4_fs_key));
}

static uint32_t
vs_cache_hash(const void *key)
{
        return _mesa_hash_data(key, sizeof(struct vc4_vs_key));
}

static bool
fs_cache_compare(const void *key1, const void *key2)
{
        return memcmp(key1, key2, sizeof(struct vc4_fs_key)) == 0;
}

static bool
vs_cache_compare(const void *key1, const void *key2)
{
        return memcmp(key1, key2, sizeof(struct vc4_vs_key)) == 0;
}

static void
delete_from_cache_if_matches(struct hash_table *ht,
                             struct hash_entry *entry,
                             struct vc4_uncompiled_shader *so)
{
        const struct vc4_key *key = entry->key;

        if (key->shader_state == so) {
                struct vc4_compiled_shader *shader = entry->data;
                _mesa_hash_table_remove(ht, entry);
                vc4_bo_unreference(&shader->bo);
                ralloc_free(shader);
        }
}

static void
vc4_shader_state_delete(struct pipe_context *pctx, void *hwcso)
{
        struct vc4_context *vc4 = vc4_context(pctx);
        struct vc4_uncompiled_shader *so = hwcso;

        struct hash_entry *entry;
        hash_table_foreach(vc4->fs_cache, entry)
                delete_from_cache_if_matches(vc4->fs_cache, entry, so);
        hash_table_foreach(vc4->vs_cache, entry)
                delete_from_cache_if_matches(vc4->vs_cache, entry, so);

        if (so->twoside_tokens != so->base.tokens)
                free((void *)so->twoside_tokens);
        free((void *)so->base.tokens);
        free(so);
}

static uint32_t translate_wrap(uint32_t p_wrap, bool using_nearest)
{
        switch (p_wrap) {
        case PIPE_TEX_WRAP_REPEAT:
                return 0;
        case PIPE_TEX_WRAP_CLAMP_TO_EDGE:
                return 1;
        case PIPE_TEX_WRAP_MIRROR_REPEAT:
                return 2;
        case PIPE_TEX_WRAP_CLAMP_TO_BORDER:
                return 3;
        case PIPE_TEX_WRAP_CLAMP:
                return (using_nearest ? 1 : 3);
        default:
                fprintf(stderr, "Unknown wrap mode %d\n", p_wrap);
                assert(!"not reached");
                return 0;
        }
}

static void
write_texture_p0(struct vc4_context *vc4,
                 struct vc4_texture_stateobj *texstate,
                 uint32_t unit)
{
        struct pipe_sampler_view *texture = texstate->textures[unit];
        struct vc4_resource *rsc = vc4_resource(texture->texture);

        cl_reloc(vc4, &vc4->uniforms, rsc->bo,
                 VC4_SET_FIELD(rsc->slices[0].offset >> 12, VC4_TEX_P0_OFFSET) |
                 VC4_SET_FIELD(texture->u.tex.last_level -
                               texture->u.tex.first_level, VC4_TEX_P0_MIPLVLS) |
                 VC4_SET_FIELD(texture->target == PIPE_TEXTURE_CUBE,
                               VC4_TEX_P0_CMMODE) |
                 VC4_SET_FIELD(rsc->vc4_format & 15, VC4_TEX_P0_TYPE));
}

static void
write_texture_p1(struct vc4_context *vc4,
                 struct vc4_texture_stateobj *texstate,
                 uint32_t unit)
{
        struct pipe_sampler_view *texture = texstate->textures[unit];
        struct vc4_resource *rsc = vc4_resource(texture->texture);
        struct pipe_sampler_state *sampler = texstate->samplers[unit];
        static const uint8_t minfilter_map[6] = {
                VC4_TEX_P1_MINFILT_NEAR_MIP_NEAR,
                VC4_TEX_P1_MINFILT_LIN_MIP_NEAR,
                VC4_TEX_P1_MINFILT_NEAR_MIP_LIN,
                VC4_TEX_P1_MINFILT_LIN_MIP_LIN,
                VC4_TEX_P1_MINFILT_NEAREST,
                VC4_TEX_P1_MINFILT_LINEAR,
        };
        static const uint32_t magfilter_map[] = {
                [PIPE_TEX_FILTER_NEAREST] = VC4_TEX_P1_MAGFILT_NEAREST,
                [PIPE_TEX_FILTER_LINEAR] = VC4_TEX_P1_MAGFILT_LINEAR,
        };

        bool either_nearest =
                (sampler->mag_img_filter == PIPE_TEX_MIPFILTER_NEAREST ||
                 sampler->min_img_filter == PIPE_TEX_MIPFILTER_NEAREST);

        cl_aligned_u32(&vc4->uniforms,
               VC4_SET_FIELD(rsc->vc4_format >> 4, VC4_TEX_P1_TYPE4) |
               VC4_SET_FIELD(texture->texture->height0 & 2047,
                             VC4_TEX_P1_HEIGHT) |
               VC4_SET_FIELD(texture->texture->width0 & 2047,
                             VC4_TEX_P1_WIDTH) |
               VC4_SET_FIELD(magfilter_map[sampler->mag_img_filter],
                             VC4_TEX_P1_MAGFILT) |
               VC4_SET_FIELD(minfilter_map[sampler->min_mip_filter * 2 +
                                           sampler->min_img_filter],
                             VC4_TEX_P1_MINFILT) |
               VC4_SET_FIELD(translate_wrap(sampler->wrap_s, either_nearest),
                             VC4_TEX_P1_WRAP_S) |
               VC4_SET_FIELD(translate_wrap(sampler->wrap_t, either_nearest),
                             VC4_TEX_P1_WRAP_T));
}

static void
write_texture_p2(struct vc4_context *vc4,
                 struct vc4_texture_stateobj *texstate,
                 uint32_t data)
{
        uint32_t unit = data & 0xffff;
        struct pipe_sampler_view *texture = texstate->textures[unit];
        struct vc4_resource *rsc = vc4_resource(texture->texture);

        cl_aligned_u32(&vc4->uniforms,
               VC4_SET_FIELD(VC4_TEX_P2_PTYPE_CUBE_MAP_STRIDE,
                             VC4_TEX_P2_PTYPE) |
               VC4_SET_FIELD(rsc->cube_map_stride >> 12, VC4_TEX_P2_CMST) |
               VC4_SET_FIELD((data >> 16) & 1, VC4_TEX_P2_BSLOD));
}


#define SWIZ(x,y,z,w) {          \
        UTIL_FORMAT_SWIZZLE_##x, \
        UTIL_FORMAT_SWIZZLE_##y, \
        UTIL_FORMAT_SWIZZLE_##z, \
        UTIL_FORMAT_SWIZZLE_##w  \
}

static void
write_texture_border_color(struct vc4_context *vc4,
                           struct vc4_texture_stateobj *texstate,
                           uint32_t unit)
{
        struct pipe_sampler_state *sampler = texstate->samplers[unit];
        struct pipe_sampler_view *texture = texstate->textures[unit];
        struct vc4_resource *rsc = vc4_resource(texture->texture);
        union util_color uc;

        const struct util_format_description *tex_format_desc =
                util_format_description(texture->format);

        float border_color[4];
        for (int i = 0; i < 4; i++)
                border_color[i] = sampler->border_color.f[i];
        if (util_format_is_srgb(texture->format)) {
                for (int i = 0; i < 3; i++)
                        border_color[i] =
                                util_format_linear_to_srgb_float(border_color[i]);
        }

        /* Turn the border color into the layout of channels that it would
         * have when stored as texture contents.
         */
        float storage_color[4];
        util_format_unswizzle_4f(storage_color,
                                 border_color,
                                 tex_format_desc->swizzle);

        /* Now, pack so that when the vc4_format-sampled texture contents are
         * replaced with our border color, the vc4_get_format_swizzle()
         * swizzling will get the right channels.
         */
        if (util_format_is_depth_or_stencil(texture->format)) {
                uc.ui[0] = util_pack_z(PIPE_FORMAT_Z24X8_UNORM,
                                       sampler->border_color.f[0]) << 8;
        } else {
                switch (rsc->vc4_format) {
                default:
                case VC4_TEXTURE_TYPE_RGBA8888:
                        util_pack_color(storage_color,
                                        PIPE_FORMAT_R8G8B8A8_UNORM, &uc);
                        break;
                case VC4_TEXTURE_TYPE_RGBA4444:
                        util_pack_color(storage_color,
                                        PIPE_FORMAT_A8B8G8R8_UNORM, &uc);
                        break;
                case VC4_TEXTURE_TYPE_RGB565:
                        util_pack_color(storage_color,
                                        PIPE_FORMAT_B8G8R8A8_UNORM, &uc);
                        break;
                case VC4_TEXTURE_TYPE_ALPHA:
                        uc.ui[0] = float_to_ubyte(storage_color[0]) << 24;
                        break;
                case VC4_TEXTURE_TYPE_LUMALPHA:
                        uc.ui[0] = ((float_to_ubyte(storage_color[1]) << 24) |
                                    (float_to_ubyte(storage_color[0]) << 0));
                        break;
                }
        }

        cl_aligned_u32(&vc4->uniforms, uc.ui[0]);
}

static uint32_t
get_texrect_scale(struct vc4_texture_stateobj *texstate,
                  enum quniform_contents contents,
                  uint32_t data)
{
        struct pipe_sampler_view *texture = texstate->textures[data];
        uint32_t dim;

        if (contents == QUNIFORM_TEXRECT_SCALE_X)
                dim = texture->texture->width0;
        else
                dim = texture->texture->height0;

        return fui(1.0f / dim);
}

static struct vc4_bo *
vc4_upload_ubo(struct vc4_context *vc4, struct vc4_compiled_shader *shader,
               const uint32_t *gallium_uniforms)
{
        if (!shader->ubo_size)
                return NULL;

        struct vc4_bo *ubo = vc4_bo_alloc(vc4->screen, shader->ubo_size, "ubo");
        uint32_t *data = vc4_bo_map(ubo);
        for (uint32_t i = 0; i < shader->num_ubo_ranges; i++) {
                memcpy(data + shader->ubo_ranges[i].dst_offset,
                       gallium_uniforms + shader->ubo_ranges[i].src_offset,
                       shader->ubo_ranges[i].size);
        }

        return ubo;
}

void
vc4_write_uniforms(struct vc4_context *vc4, struct vc4_compiled_shader *shader,
                   struct vc4_constbuf_stateobj *cb,
                   struct vc4_texture_stateobj *texstate)
{
        struct vc4_shader_uniform_info *uinfo = &shader->uniforms;
        const uint32_t *gallium_uniforms = cb->cb[0].user_buffer;
        struct vc4_bo *ubo = vc4_upload_ubo(vc4, shader, gallium_uniforms);

        cl_ensure_space(&vc4->uniforms, (uinfo->count +
                                         uinfo->num_texture_samples) * 4);

        cl_start_shader_reloc(&vc4->uniforms, uinfo->num_texture_samples);

        for (int i = 0; i < uinfo->count; i++) {

                switch (uinfo->contents[i]) {
                case QUNIFORM_CONSTANT:
                        cl_aligned_u32(&vc4->uniforms, uinfo->data[i]);
                        break;
                case QUNIFORM_UNIFORM:
                        cl_aligned_u32(&vc4->uniforms,
                                       gallium_uniforms[uinfo->data[i]]);
                        break;
                case QUNIFORM_VIEWPORT_X_SCALE:
                        cl_aligned_f(&vc4->uniforms, vc4->viewport.scale[0] * 16.0f);
                        break;
                case QUNIFORM_VIEWPORT_Y_SCALE:
                        cl_aligned_f(&vc4->uniforms, vc4->viewport.scale[1] * 16.0f);
                        break;

                case QUNIFORM_VIEWPORT_Z_OFFSET:
                        cl_aligned_f(&vc4->uniforms, vc4->viewport.translate[2]);
                        break;
                case QUNIFORM_VIEWPORT_Z_SCALE:
                        cl_aligned_f(&vc4->uniforms, vc4->viewport.scale[2]);
                        break;

                case QUNIFORM_USER_CLIP_PLANE:
                        cl_aligned_f(&vc4->uniforms,
                                     vc4->clip.ucp[uinfo->data[i] / 4][uinfo->data[i] % 4]);
                        break;

                case QUNIFORM_TEXTURE_CONFIG_P0:
                        write_texture_p0(vc4, texstate, uinfo->data[i]);
                        break;

                case QUNIFORM_TEXTURE_CONFIG_P1:
                        write_texture_p1(vc4, texstate, uinfo->data[i]);
                        break;

                case QUNIFORM_TEXTURE_CONFIG_P2:
                        write_texture_p2(vc4, texstate, uinfo->data[i]);
                        break;

                case QUNIFORM_UBO_ADDR:
                        cl_aligned_reloc(vc4, &vc4->uniforms, ubo, 0);
                        break;

                case QUNIFORM_TEXTURE_BORDER_COLOR:
                        write_texture_border_color(vc4, texstate, uinfo->data[i]);
                        break;

                case QUNIFORM_TEXRECT_SCALE_X:
                case QUNIFORM_TEXRECT_SCALE_Y:
                        cl_aligned_u32(&vc4->uniforms,
                                       get_texrect_scale(texstate,
                                                         uinfo->contents[i],
                                                         uinfo->data[i]));
                        break;

                case QUNIFORM_BLEND_CONST_COLOR:
                        cl_aligned_f(&vc4->uniforms,
                                     CLAMP(vc4->blend_color.color[uinfo->data[i]], 0, 1));
                        break;

                case QUNIFORM_STENCIL:
                        cl_aligned_u32(&vc4->uniforms,
                                       vc4->zsa->stencil_uniforms[uinfo->data[i]] |
                                       (uinfo->data[i] <= 1 ?
                                        (vc4->stencil_ref.ref_value[uinfo->data[i]] << 8) :
                                        0));
                        break;

                case QUNIFORM_ALPHA_REF:
                        cl_aligned_f(&vc4->uniforms,
                                     vc4->zsa->base.alpha.ref_value);
                        break;
                }
#if 0
                uint32_t written_val = *(uint32_t *)(vc4->uniforms.next - 4);
                fprintf(stderr, "%p: %d / 0x%08x (%f)\n",
                        shader, i, written_val, uif(written_val));
#endif
        }
}

static void
vc4_fp_state_bind(struct pipe_context *pctx, void *hwcso)
{
        struct vc4_context *vc4 = vc4_context(pctx);
        vc4->prog.bind_fs = hwcso;
        vc4->dirty |= VC4_DIRTY_UNCOMPILED_FS;
}

static void
vc4_vp_state_bind(struct pipe_context *pctx, void *hwcso)
{
        struct vc4_context *vc4 = vc4_context(pctx);
        vc4->prog.bind_vs = hwcso;
        vc4->dirty |= VC4_DIRTY_UNCOMPILED_VS;
}

void
vc4_program_init(struct pipe_context *pctx)
{
        struct vc4_context *vc4 = vc4_context(pctx);

        pctx->create_vs_state = vc4_shader_state_create;
        pctx->delete_vs_state = vc4_shader_state_delete;

        pctx->create_fs_state = vc4_shader_state_create;
        pctx->delete_fs_state = vc4_shader_state_delete;

        pctx->bind_fs_state = vc4_fp_state_bind;
        pctx->bind_vs_state = vc4_vp_state_bind;

        vc4->fs_cache = _mesa_hash_table_create(pctx, fs_cache_hash,
                                                fs_cache_compare);
        vc4->vs_cache = _mesa_hash_table_create(pctx, vs_cache_hash,
                                                vs_cache_compare);
}

void
vc4_program_fini(struct pipe_context *pctx)
{
        struct vc4_context *vc4 = vc4_context(pctx);

        struct hash_entry *entry;
        hash_table_foreach(vc4->fs_cache, entry) {
                struct vc4_compiled_shader *shader = entry->data;
                vc4_bo_unreference(&shader->bo);
                ralloc_free(shader);
                _mesa_hash_table_remove(vc4->fs_cache, entry);
        }

        hash_table_foreach(vc4->vs_cache, entry) {
                struct vc4_compiled_shader *shader = entry->data;
                vc4_bo_unreference(&shader->bo);
                ralloc_free(shader);
                _mesa_hash_table_remove(vc4->vs_cache, entry);
        }
}
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 16:03:34 +0000