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-rw-r--r--src/intel/compiler/brw_compile_sf.c879
-rw-r--r--src/intel/compiler/brw_compiler.h50
-rw-r--r--src/intel/compiler/brw_eu_defines.h2
3 files changed, 931 insertions, 0 deletions
diff --git a/src/intel/compiler/brw_compile_sf.c b/src/intel/compiler/brw_compile_sf.c
new file mode 100644
index 00000000000..91e8a6da6cf
--- /dev/null
+++ b/src/intel/compiler/brw_compile_sf.c
@@ -0,0 +1,879 @@
+/*
+ * Copyright © 2006 - 2017 Intel Corporation
+ *
+ * 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 "brw_compiler.h"
+#include "brw_eu.h"
+
+#include "common/gen_debug.h"
+
+struct brw_sf_compile {
+ struct brw_codegen func;
+ struct brw_sf_prog_key key;
+ struct brw_sf_prog_data prog_data;
+
+ struct brw_reg pv;
+ struct brw_reg det;
+ struct brw_reg dx0;
+ struct brw_reg dx2;
+ struct brw_reg dy0;
+ struct brw_reg dy2;
+
+ /* z and 1/w passed in seperately:
+ */
+ struct brw_reg z[3];
+ struct brw_reg inv_w[3];
+
+ /* The vertices:
+ */
+ struct brw_reg vert[3];
+
+ /* Temporaries, allocated after last vertex reg.
+ */
+ struct brw_reg inv_det;
+ struct brw_reg a1_sub_a0;
+ struct brw_reg a2_sub_a0;
+ struct brw_reg tmp;
+
+ struct brw_reg m1Cx;
+ struct brw_reg m2Cy;
+ struct brw_reg m3C0;
+
+ GLuint nr_verts;
+ GLuint nr_attr_regs;
+ GLuint nr_setup_regs;
+ int urb_entry_read_offset;
+
+ /** The last known value of the f0.0 flag register. */
+ unsigned flag_value;
+
+ struct brw_vue_map vue_map;
+};
+
+/**
+ * Determine the vue slot corresponding to the given half of the given register.
+ */
+static inline int vert_reg_to_vue_slot(struct brw_sf_compile *c, GLuint reg,
+ int half)
+{
+ return (reg + c->urb_entry_read_offset) * 2 + half;
+}
+
+/**
+ * Determine the varying corresponding to the given half of the given
+ * register. half=0 means the first half of a register, half=1 means the
+ * second half.
+ */
+static inline int vert_reg_to_varying(struct brw_sf_compile *c, GLuint reg,
+ int half)
+{
+ int vue_slot = vert_reg_to_vue_slot(c, reg, half);
+ return c->vue_map.slot_to_varying[vue_slot];
+}
+
+/**
+ * Determine the register corresponding to the given vue slot
+ */
+static struct brw_reg get_vue_slot(struct brw_sf_compile *c,
+ struct brw_reg vert,
+ int vue_slot)
+{
+ GLuint off = vue_slot / 2 - c->urb_entry_read_offset;
+ GLuint sub = vue_slot % 2;
+
+ return brw_vec4_grf(vert.nr + off, sub * 4);
+}
+
+/**
+ * Determine the register corresponding to the given varying.
+ */
+static struct brw_reg get_varying(struct brw_sf_compile *c,
+ struct brw_reg vert,
+ GLuint varying)
+{
+ int vue_slot = c->vue_map.varying_to_slot[varying];
+ assert (vue_slot >= c->urb_entry_read_offset);
+ return get_vue_slot(c, vert, vue_slot);
+}
+
+static bool
+have_attr(struct brw_sf_compile *c, GLuint attr)
+{
+ return (c->key.attrs & BITFIELD64_BIT(attr)) ? 1 : 0;
+}
+
+/***********************************************************************
+ * Twoside lighting
+ */
+static void copy_bfc( struct brw_sf_compile *c,
+ struct brw_reg vert )
+{
+ struct brw_codegen *p = &c->func;
+ GLuint i;
+
+ for (i = 0; i < 2; i++) {
+ if (have_attr(c, VARYING_SLOT_COL0+i) &&
+ have_attr(c, VARYING_SLOT_BFC0+i))
+ brw_MOV(p,
+ get_varying(c, vert, VARYING_SLOT_COL0+i),
+ get_varying(c, vert, VARYING_SLOT_BFC0+i));
+ }
+}
+
+
+static void do_twoside_color( struct brw_sf_compile *c )
+{
+ struct brw_codegen *p = &c->func;
+ GLuint backface_conditional = c->key.frontface_ccw ? BRW_CONDITIONAL_G : BRW_CONDITIONAL_L;
+
+ /* Already done in clip program:
+ */
+ if (c->key.primitive == BRW_SF_PRIM_UNFILLED_TRIS)
+ return;
+
+ /* If the vertex shader provides backface color, do the selection. The VS
+ * promises to set up the front color if the backface color is provided, but
+ * it may contain junk if never written to.
+ */
+ if (!(have_attr(c, VARYING_SLOT_COL0) && have_attr(c, VARYING_SLOT_BFC0)) &&
+ !(have_attr(c, VARYING_SLOT_COL1) && have_attr(c, VARYING_SLOT_BFC1)))
+ return;
+
+ /* Need to use BRW_EXECUTE_4 and also do an 4-wide compare in order
+ * to get all channels active inside the IF. In the clipping code
+ * we run with NoMask, so it's not an option and we can use
+ * BRW_EXECUTE_1 for all comparisions.
+ */
+ brw_CMP(p, vec4(brw_null_reg()), backface_conditional, c->det, brw_imm_f(0));
+ brw_IF(p, BRW_EXECUTE_4);
+ {
+ switch (c->nr_verts) {
+ case 3: copy_bfc(c, c->vert[2]);
+ case 2: copy_bfc(c, c->vert[1]);
+ case 1: copy_bfc(c, c->vert[0]);
+ }
+ }
+ brw_ENDIF(p);
+}
+
+
+
+/***********************************************************************
+ * Flat shading
+ */
+
+static void copy_flatshaded_attributes(struct brw_sf_compile *c,
+ struct brw_reg dst,
+ struct brw_reg src)
+{
+ struct brw_codegen *p = &c->func;
+ int i;
+
+ for (i = 0; i < c->vue_map.num_slots; i++) {
+ if (c->key.interp_mode[i] == INTERP_MODE_FLAT) {
+ brw_MOV(p,
+ get_vue_slot(c, dst, i),
+ get_vue_slot(c, src, i));
+ }
+ }
+}
+
+static int count_flatshaded_attributes(struct brw_sf_compile *c)
+{
+ int i;
+ int count = 0;
+
+ for (i = 0; i < c->vue_map.num_slots; i++)
+ if (c->key.interp_mode[i] == INTERP_MODE_FLAT)
+ count++;
+
+ return count;
+}
+
+
+
+/* Need to use a computed jump to copy flatshaded attributes as the
+ * vertices are ordered according to y-coordinate before reaching this
+ * point, so the PV could be anywhere.
+ */
+static void do_flatshade_triangle( struct brw_sf_compile *c )
+{
+ struct brw_codegen *p = &c->func;
+ GLuint nr;
+ GLuint jmpi = 1;
+
+ /* Already done in clip program:
+ */
+ if (c->key.primitive == BRW_SF_PRIM_UNFILLED_TRIS)
+ return;
+
+ if (p->devinfo->gen == 5)
+ jmpi = 2;
+
+ nr = count_flatshaded_attributes(c);
+
+ brw_MUL(p, c->pv, c->pv, brw_imm_d(jmpi*(nr*2+1)));
+ brw_JMPI(p, c->pv, BRW_PREDICATE_NONE);
+
+ copy_flatshaded_attributes(c, c->vert[1], c->vert[0]);
+ copy_flatshaded_attributes(c, c->vert[2], c->vert[0]);
+ brw_JMPI(p, brw_imm_d(jmpi*(nr*4+1)), BRW_PREDICATE_NONE);
+
+ copy_flatshaded_attributes(c, c->vert[0], c->vert[1]);
+ copy_flatshaded_attributes(c, c->vert[2], c->vert[1]);
+ brw_JMPI(p, brw_imm_d(jmpi*nr*2), BRW_PREDICATE_NONE);
+
+ copy_flatshaded_attributes(c, c->vert[0], c->vert[2]);
+ copy_flatshaded_attributes(c, c->vert[1], c->vert[2]);
+}
+
+
+static void do_flatshade_line( struct brw_sf_compile *c )
+{
+ struct brw_codegen *p = &c->func;
+ GLuint nr;
+ GLuint jmpi = 1;
+
+ /* Already done in clip program:
+ */
+ if (c->key.primitive == BRW_SF_PRIM_UNFILLED_TRIS)
+ return;
+
+ if (p->devinfo->gen == 5)
+ jmpi = 2;
+
+ nr = count_flatshaded_attributes(c);
+
+ brw_MUL(p, c->pv, c->pv, brw_imm_d(jmpi*(nr+1)));
+ brw_JMPI(p, c->pv, BRW_PREDICATE_NONE);
+ copy_flatshaded_attributes(c, c->vert[1], c->vert[0]);
+
+ brw_JMPI(p, brw_imm_ud(jmpi*nr), BRW_PREDICATE_NONE);
+ copy_flatshaded_attributes(c, c->vert[0], c->vert[1]);
+}
+
+
+/***********************************************************************
+ * Triangle setup.
+ */
+
+
+static void alloc_regs( struct brw_sf_compile *c )
+{
+ GLuint reg, i;
+
+ /* Values computed by fixed function unit:
+ */
+ c->pv = retype(brw_vec1_grf(1, 1), BRW_REGISTER_TYPE_D);
+ c->det = brw_vec1_grf(1, 2);
+ c->dx0 = brw_vec1_grf(1, 3);
+ c->dx2 = brw_vec1_grf(1, 4);
+ c->dy0 = brw_vec1_grf(1, 5);
+ c->dy2 = brw_vec1_grf(1, 6);
+
+ /* z and 1/w passed in seperately:
+ */
+ c->z[0] = brw_vec1_grf(2, 0);
+ c->inv_w[0] = brw_vec1_grf(2, 1);
+ c->z[1] = brw_vec1_grf(2, 2);
+ c->inv_w[1] = brw_vec1_grf(2, 3);
+ c->z[2] = brw_vec1_grf(2, 4);
+ c->inv_w[2] = brw_vec1_grf(2, 5);
+
+ /* The vertices:
+ */
+ reg = 3;
+ for (i = 0; i < c->nr_verts; i++) {
+ c->vert[i] = brw_vec8_grf(reg, 0);
+ reg += c->nr_attr_regs;
+ }
+
+ /* Temporaries, allocated after last vertex reg.
+ */
+ c->inv_det = brw_vec1_grf(reg, 0); reg++;
+ c->a1_sub_a0 = brw_vec8_grf(reg, 0); reg++;
+ c->a2_sub_a0 = brw_vec8_grf(reg, 0); reg++;
+ c->tmp = brw_vec8_grf(reg, 0); reg++;
+
+ /* Note grf allocation:
+ */
+ c->prog_data.total_grf = reg;
+
+
+ /* Outputs of this program - interpolation coefficients for
+ * rasterization:
+ */
+ c->m1Cx = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 1, 0);
+ c->m2Cy = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 2, 0);
+ c->m3C0 = brw_vec8_reg(BRW_MESSAGE_REGISTER_FILE, 3, 0);
+}
+
+
+static void copy_z_inv_w( struct brw_sf_compile *c )
+{
+ struct brw_codegen *p = &c->func;
+ GLuint i;
+
+ /* Copy both scalars with a single MOV:
+ */
+ for (i = 0; i < c->nr_verts; i++)
+ brw_MOV(p, vec2(suboffset(c->vert[i], 2)), vec2(c->z[i]));
+}
+
+
+static void invert_det( struct brw_sf_compile *c)
+{
+ /* Looks like we invert all 8 elements just to get 1/det in
+ * position 2 !?!
+ */
+ gen4_math(&c->func,
+ c->inv_det,
+ BRW_MATH_FUNCTION_INV,
+ 0,
+ c->det,
+ BRW_MATH_PRECISION_FULL);
+
+}
+
+
+static bool
+calculate_masks(struct brw_sf_compile *c,
+ GLuint reg,
+ GLushort *pc,
+ GLushort *pc_persp,
+ GLushort *pc_linear)
+{
+ bool is_last_attr = (reg == c->nr_setup_regs - 1);
+ enum glsl_interp_mode interp;
+
+ *pc_persp = 0;
+ *pc_linear = 0;
+ *pc = 0xf;
+
+ interp = c->key.interp_mode[vert_reg_to_vue_slot(c, reg, 0)];
+ if (interp == INTERP_MODE_SMOOTH) {
+ *pc_linear = 0xf;
+ *pc_persp = 0xf;
+ } else if (interp == INTERP_MODE_NOPERSPECTIVE)
+ *pc_linear = 0xf;
+
+ /* Maybe only processs one attribute on the final round:
+ */
+ if (vert_reg_to_varying(c, reg, 1) != BRW_VARYING_SLOT_COUNT) {
+ *pc |= 0xf0;
+
+ interp = c->key.interp_mode[vert_reg_to_vue_slot(c, reg, 1)];
+ if (interp == INTERP_MODE_SMOOTH) {
+ *pc_linear |= 0xf0;
+ *pc_persp |= 0xf0;
+ } else if (interp == INTERP_MODE_NOPERSPECTIVE)
+ *pc_linear |= 0xf0;
+ }
+
+ return is_last_attr;
+}
+
+/* Calculates the predicate control for which channels of a reg
+ * (containing 2 attrs) to do point sprite coordinate replacement on.
+ */
+static uint16_t
+calculate_point_sprite_mask(struct brw_sf_compile *c, GLuint reg)
+{
+ int varying1, varying2;
+ uint16_t pc = 0;
+
+ varying1 = vert_reg_to_varying(c, reg, 0);
+ if (varying1 >= VARYING_SLOT_TEX0 && varying1 <= VARYING_SLOT_TEX7) {
+ if (c->key.point_sprite_coord_replace & (1 << (varying1 - VARYING_SLOT_TEX0)))
+ pc |= 0x0f;
+ }
+ if (varying1 == BRW_VARYING_SLOT_PNTC)
+ pc |= 0x0f;
+
+ varying2 = vert_reg_to_varying(c, reg, 1);
+ if (varying2 >= VARYING_SLOT_TEX0 && varying2 <= VARYING_SLOT_TEX7) {
+ if (c->key.point_sprite_coord_replace & (1 << (varying2 -
+ VARYING_SLOT_TEX0)))
+ pc |= 0xf0;
+ }
+ if (varying2 == BRW_VARYING_SLOT_PNTC)
+ pc |= 0xf0;
+
+ return pc;
+}
+
+static void
+set_predicate_control_flag_value(struct brw_codegen *p,
+ struct brw_sf_compile *c,
+ unsigned value)
+{
+ brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
+
+ if (value != 0xff) {
+ if (value != c->flag_value) {
+ brw_MOV(p, brw_flag_reg(0, 0), brw_imm_uw(value));
+ c->flag_value = value;
+ }
+
+ brw_set_default_predicate_control(p, BRW_PREDICATE_NORMAL);
+ }
+}
+
+static void brw_emit_tri_setup(struct brw_sf_compile *c, bool allocate)
+{
+ struct brw_codegen *p = &c->func;
+ GLuint i;
+
+ c->flag_value = 0xff;
+ c->nr_verts = 3;
+
+ if (allocate)
+ alloc_regs(c);
+
+ invert_det(c);
+ copy_z_inv_w(c);
+
+ if (c->key.do_twoside_color)
+ do_twoside_color(c);
+
+ if (c->key.contains_flat_varying)
+ do_flatshade_triangle(c);
+
+
+ for (i = 0; i < c->nr_setup_regs; i++)
+ {
+ /* Pair of incoming attributes:
+ */
+ struct brw_reg a0 = offset(c->vert[0], i);
+ struct brw_reg a1 = offset(c->vert[1], i);
+ struct brw_reg a2 = offset(c->vert[2], i);
+ GLushort pc, pc_persp, pc_linear;
+ bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
+
+ if (pc_persp)
+ {
+ set_predicate_control_flag_value(p, c, pc_persp);
+ brw_MUL(p, a0, a0, c->inv_w[0]);
+ brw_MUL(p, a1, a1, c->inv_w[1]);
+ brw_MUL(p, a2, a2, c->inv_w[2]);
+ }
+
+
+ /* Calculate coefficients for interpolated values:
+ */
+ if (pc_linear)
+ {
+ set_predicate_control_flag_value(p, c, pc_linear);
+
+ brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
+ brw_ADD(p, c->a2_sub_a0, a2, negate(a0));
+
+ /* calculate dA/dx
+ */
+ brw_MUL(p, brw_null_reg(), c->a1_sub_a0, c->dy2);
+ brw_MAC(p, c->tmp, c->a2_sub_a0, negate(c->dy0));
+ brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
+
+ /* calculate dA/dy
+ */
+ brw_MUL(p, brw_null_reg(), c->a2_sub_a0, c->dx0);
+ brw_MAC(p, c->tmp, c->a1_sub_a0, negate(c->dx2));
+ brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
+ }
+
+ {
+ set_predicate_control_flag_value(p, c, pc);
+ /* start point for interpolation
+ */
+ brw_MOV(p, c->m3C0, a0);
+
+ /* Copy m0..m3 to URB. m0 is implicitly copied from r0 in
+ * the send instruction:
+ */
+ brw_urb_WRITE(p,
+ brw_null_reg(),
+ 0,
+ brw_vec8_grf(0, 0), /* r0, will be copied to m0 */
+ last ? BRW_URB_WRITE_EOT_COMPLETE
+ : BRW_URB_WRITE_NO_FLAGS,
+ 4, /* msg len */
+ 0, /* response len */
+ i*4, /* offset */
+ BRW_URB_SWIZZLE_TRANSPOSE); /* XXX: Swizzle control "SF to windower" */
+ }
+ }
+
+ brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
+}
+
+
+
+static void brw_emit_line_setup(struct brw_sf_compile *c, bool allocate)
+{
+ struct brw_codegen *p = &c->func;
+ GLuint i;
+
+ c->flag_value = 0xff;
+ c->nr_verts = 2;
+
+ if (allocate)
+ alloc_regs(c);
+
+ invert_det(c);
+ copy_z_inv_w(c);
+
+ if (c->key.contains_flat_varying)
+ do_flatshade_line(c);
+
+ for (i = 0; i < c->nr_setup_regs; i++)
+ {
+ /* Pair of incoming attributes:
+ */
+ struct brw_reg a0 = offset(c->vert[0], i);
+ struct brw_reg a1 = offset(c->vert[1], i);
+ GLushort pc, pc_persp, pc_linear;
+ bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
+
+ if (pc_persp)
+ {
+ set_predicate_control_flag_value(p, c, pc_persp);
+ brw_MUL(p, a0, a0, c->inv_w[0]);
+ brw_MUL(p, a1, a1, c->inv_w[1]);
+ }
+
+ /* Calculate coefficients for position, color:
+ */
+ if (pc_linear) {
+ set_predicate_control_flag_value(p, c, pc_linear);
+
+ brw_ADD(p, c->a1_sub_a0, a1, negate(a0));
+
+ brw_MUL(p, c->tmp, c->a1_sub_a0, c->dx0);
+ brw_MUL(p, c->m1Cx, c->tmp, c->inv_det);
+
+ brw_MUL(p, c->tmp, c->a1_sub_a0, c->dy0);
+ brw_MUL(p, c->m2Cy, c->tmp, c->inv_det);
+ }
+
+ {
+ set_predicate_control_flag_value(p, c, pc);
+
+ /* start point for interpolation
+ */
+ brw_MOV(p, c->m3C0, a0);
+
+ /* Copy m0..m3 to URB.
+ */
+ brw_urb_WRITE(p,
+ brw_null_reg(),
+ 0,
+ brw_vec8_grf(0, 0),
+ last ? BRW_URB_WRITE_EOT_COMPLETE
+ : BRW_URB_WRITE_NO_FLAGS,
+ 4, /* msg len */
+ 0, /* response len */
+ i*4, /* urb destination offset */
+ BRW_URB_SWIZZLE_TRANSPOSE);
+ }
+ }
+
+ brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
+}
+
+static void brw_emit_point_sprite_setup(struct brw_sf_compile *c, bool allocate)
+{
+ struct brw_codegen *p = &c->func;
+ GLuint i;
+
+ c->flag_value = 0xff;
+ c->nr_verts = 1;
+
+ if (allocate)
+ alloc_regs(c);
+
+ copy_z_inv_w(c);
+ for (i = 0; i < c->nr_setup_regs; i++)
+ {
+ struct brw_reg a0 = offset(c->vert[0], i);
+ GLushort pc, pc_persp, pc_linear, pc_coord_replace;
+ bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
+
+ pc_coord_replace = calculate_point_sprite_mask(c, i);
+ pc_persp &= ~pc_coord_replace;
+
+ if (pc_persp) {
+ set_predicate_control_flag_value(p, c, pc_persp);
+ brw_MUL(p, a0, a0, c->inv_w[0]);
+ }
+
+ /* Point sprite coordinate replacement: A texcoord with this
+ * enabled gets replaced with the value (x, y, 0, 1) where x and
+ * y vary from 0 to 1 across the horizontal and vertical of the
+ * point.
+ */
+ if (pc_coord_replace) {
+ set_predicate_control_flag_value(p, c, pc_coord_replace);
+ /* Caculate 1.0/PointWidth */
+ gen4_math(&c->func,
+ c->tmp,
+ BRW_MATH_FUNCTION_INV,
+ 0,
+ c->dx0,
+ BRW_MATH_PRECISION_FULL);
+
+ brw_set_default_access_mode(p, BRW_ALIGN_16);
+
+ /* dA/dx, dA/dy */
+ brw_MOV(p, c->m1Cx, brw_imm_f(0.0));
+ brw_MOV(p, c->m2Cy, brw_imm_f(0.0));
+ brw_MOV(p, brw_writemask(c->m1Cx, WRITEMASK_X), c->tmp);
+ if (c->key.sprite_origin_lower_left) {
+ brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), negate(c->tmp));
+ } else {
+ brw_MOV(p, brw_writemask(c->m2Cy, WRITEMASK_Y), c->tmp);
+ }
+
+ /* attribute constant offset */
+ brw_MOV(p, c->m3C0, brw_imm_f(0.0));
+ if (c->key.sprite_origin_lower_left) {
+ brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_YW), brw_imm_f(1.0));
+ } else {
+ brw_MOV(p, brw_writemask(c->m3C0, WRITEMASK_W), brw_imm_f(1.0));
+ }
+
+ brw_set_default_access_mode(p, BRW_ALIGN_1);
+ }
+
+ if (pc & ~pc_coord_replace) {
+ set_predicate_control_flag_value(p, c, pc & ~pc_coord_replace);
+ brw_MOV(p, c->m1Cx, brw_imm_ud(0));
+ brw_MOV(p, c->m2Cy, brw_imm_ud(0));
+ brw_MOV(p, c->m3C0, a0); /* constant value */
+ }
+
+
+ set_predicate_control_flag_value(p, c, pc);
+ /* Copy m0..m3 to URB. */
+ brw_urb_WRITE(p,
+ brw_null_reg(),
+ 0,
+ brw_vec8_grf(0, 0),
+ last ? BRW_URB_WRITE_EOT_COMPLETE
+ : BRW_URB_WRITE_NO_FLAGS,
+ 4, /* msg len */
+ 0, /* response len */
+ i*4, /* urb destination offset */
+ BRW_URB_SWIZZLE_TRANSPOSE);
+ }
+
+ brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
+}
+
+/* Points setup - several simplifications as all attributes are
+ * constant across the face of the point (point sprites excluded!)
+ */
+static void brw_emit_point_setup(struct brw_sf_compile *c, bool allocate)
+{
+ struct brw_codegen *p = &c->func;
+ GLuint i;
+
+ c->flag_value = 0xff;
+ c->nr_verts = 1;
+
+ if (allocate)
+ alloc_regs(c);
+
+ copy_z_inv_w(c);
+
+ brw_MOV(p, c->m1Cx, brw_imm_ud(0)); /* zero - move out of loop */
+ brw_MOV(p, c->m2Cy, brw_imm_ud(0)); /* zero - move out of loop */
+
+ for (i = 0; i < c->nr_setup_regs; i++)
+ {
+ struct brw_reg a0 = offset(c->vert[0], i);
+ GLushort pc, pc_persp, pc_linear;
+ bool last = calculate_masks(c, i, &pc, &pc_persp, &pc_linear);
+
+ if (pc_persp)
+ {
+ /* This seems odd as the values are all constant, but the
+ * fragment shader will be expecting it:
+ */
+ set_predicate_control_flag_value(p, c, pc_persp);
+ brw_MUL(p, a0, a0, c->inv_w[0]);
+ }
+
+
+ /* The delta values are always zero, just send the starting
+ * coordinate. Again, this is to fit in with the interpolation
+ * code in the fragment shader.
+ */
+ {
+ set_predicate_control_flag_value(p, c, pc);
+
+ brw_MOV(p, c->m3C0, a0); /* constant value */
+
+ /* Copy m0..m3 to URB.
+ */
+ brw_urb_WRITE(p,
+ brw_null_reg(),
+ 0,
+ brw_vec8_grf(0, 0),
+ last ? BRW_URB_WRITE_EOT_COMPLETE
+ : BRW_URB_WRITE_NO_FLAGS,
+ 4, /* msg len */
+ 0, /* response len */
+ i*4, /* urb destination offset */
+ BRW_URB_SWIZZLE_TRANSPOSE);
+ }
+ }
+
+ brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
+}
+
+static void brw_emit_anyprim_setup( struct brw_sf_compile *c )
+{
+ struct brw_codegen *p = &c->func;
+ struct brw_reg payload_prim = brw_uw1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0);
+ struct brw_reg payload_attr = get_element_ud(brw_vec1_reg(BRW_GENERAL_REGISTER_FILE, 1, 0), 0);
+ struct brw_reg primmask;
+ int jmp;
+ struct brw_reg v1_null_ud = vec1(retype(brw_null_reg(), BRW_REGISTER_TYPE_UD));
+
+ c->nr_verts = 3;
+ alloc_regs(c);
+
+ primmask = retype(get_element(c->tmp, 0), BRW_REGISTER_TYPE_UD);
+
+ brw_MOV(p, primmask, brw_imm_ud(1));
+ brw_SHL(p, primmask, primmask, payload_prim);
+
+ brw_AND(p, v1_null_ud, primmask, brw_imm_ud((1<<_3DPRIM_TRILIST) |
+ (1<<_3DPRIM_TRISTRIP) |
+ (1<<_3DPRIM_TRIFAN) |
+ (1<<_3DPRIM_TRISTRIP_REVERSE) |
+ (1<<_3DPRIM_POLYGON) |
+ (1<<_3DPRIM_RECTLIST) |
+ (1<<_3DPRIM_TRIFAN_NOSTIPPLE)));
+ brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_Z);
+ jmp = brw_JMPI(p, brw_imm_d(0), BRW_PREDICATE_NORMAL) - p->store;
+ brw_emit_tri_setup(c, false);
+ brw_land_fwd_jump(p, jmp);
+
+ brw_AND(p, v1_null_ud, primmask, brw_imm_ud((1<<_3DPRIM_LINELIST) |
+ (1<<_3DPRIM_LINESTRIP) |
+ (1<<_3DPRIM_LINELOOP) |
+ (1<<_3DPRIM_LINESTRIP_CONT) |
+ (1<<_3DPRIM_LINESTRIP_BF) |
+ (1<<_3DPRIM_LINESTRIP_CONT_BF)));
+ brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_Z);
+ jmp = brw_JMPI(p, brw_imm_d(0), BRW_PREDICATE_NORMAL) - p->store;
+ brw_emit_line_setup(c, false);
+ brw_land_fwd_jump(p, jmp);
+
+ brw_AND(p, v1_null_ud, payload_attr, brw_imm_ud(1<<BRW_SPRITE_POINT_ENABLE));
+ brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_Z);
+ jmp = brw_JMPI(p, brw_imm_d(0), BRW_PREDICATE_NORMAL) - p->store;
+ brw_emit_point_sprite_setup(c, false);
+ brw_land_fwd_jump(p, jmp);
+
+ brw_emit_point_setup( c, false );
+}
+
+const unsigned *
+brw_compile_sf(const struct brw_compiler *compiler,
+ void *mem_ctx,
+ const struct brw_sf_prog_key *key,
+ struct brw_sf_prog_data *prog_data,
+ struct brw_vue_map *vue_map,
+ unsigned *final_assembly_size)
+{
+ struct brw_sf_compile c;
+ memset(&c, 0, sizeof(c));
+
+ /* Begin the compilation:
+ */
+ brw_init_codegen(compiler->devinfo, &c.func, mem_ctx);
+
+ c.key = *key;
+ c.vue_map = *vue_map;
+ if (c.key.do_point_coord) {
+ /*
+ * gl_PointCoord is a FS instead of VS builtin variable, thus it's
+ * not included in c.vue_map generated in VS stage. Here we add
+ * it manually to let SF shader generate the needed interpolation
+ * coefficient for FS shader.
+ */
+ c.vue_map.varying_to_slot[BRW_VARYING_SLOT_PNTC] = c.vue_map.num_slots;
+ c.vue_map.slot_to_varying[c.vue_map.num_slots++] = BRW_VARYING_SLOT_PNTC;
+ }
+ c.urb_entry_read_offset = BRW_SF_URB_ENTRY_READ_OFFSET;
+ c.nr_attr_regs = (c.vue_map.num_slots + 1)/2 - c.urb_entry_read_offset;
+ c.nr_setup_regs = c.nr_attr_regs;
+
+ c.prog_data.urb_read_length = c.nr_attr_regs;
+ c.prog_data.urb_entry_size = c.nr_setup_regs * 2;
+
+ /* Which primitive? Or all three?
+ */
+ switch (key->primitive) {
+ case BRW_SF_PRIM_TRIANGLES:
+ c.nr_verts = 3;
+ brw_emit_tri_setup( &c, true );
+ break;
+ case BRW_SF_PRIM_LINES:
+ c.nr_verts = 2;
+ brw_emit_line_setup( &c, true );
+ break;
+ case BRW_SF_PRIM_POINTS:
+ c.nr_verts = 1;
+ if (key->do_point_sprite)
+ brw_emit_point_sprite_setup( &c, true );
+ else
+ brw_emit_point_setup( &c, true );
+ break;
+ case BRW_SF_PRIM_UNFILLED_TRIS:
+ c.nr_verts = 3;
+ brw_emit_anyprim_setup( &c );
+ break;
+ default:
+ unreachable("not reached");
+ }
+
+ /* FINISHME: SF programs use calculated jumps (i.e., JMPI with a register
+ * source). Compacting would be difficult.
+ */
+ /* brw_compact_instructions(&c.func, 0, 0, NULL); */
+
+ *prog_data = c.prog_data;
+
+ const unsigned *program = brw_get_program(&c.func, final_assembly_size);
+
+ if (unlikely(INTEL_DEBUG & DEBUG_SF)) {
+ fprintf(stderr, "sf:\n");
+ brw_disassemble(compiler->devinfo,
+ program, 0, *final_assembly_size, stderr);
+ fprintf(stderr, "\n");
+ }
+
+ return program;
+}
diff --git a/src/intel/compiler/brw_compiler.h b/src/intel/compiler/brw_compiler.h
index b5b1ee946a8..1f7afacfdae 100644
--- a/src/intel/compiler/brw_compiler.h
+++ b/src/intel/compiler/brw_compiler.h
@@ -260,6 +260,27 @@ struct brw_gs_prog_key
struct brw_sampler_prog_key_data tex;
};
+enum brw_sf_primitive {
+ BRW_SF_PRIM_POINTS = 0,
+ BRW_SF_PRIM_LINES = 1,
+ BRW_SF_PRIM_TRIANGLES = 2,
+ BRW_SF_PRIM_UNFILLED_TRIS = 3,
+};
+
+struct brw_sf_prog_key {
+ uint64_t attrs;
+ bool contains_flat_varying;
+ unsigned char interp_mode[65]; /* BRW_VARYING_SLOT_COUNT */
+ uint8_t point_sprite_coord_replace;
+ enum brw_sf_primitive primitive:2;
+ bool do_twoside_color:1;
+ bool frontface_ccw:1;
+ bool do_point_sprite:1;
+ bool do_point_coord:1;
+ bool sprite_origin_lower_left:1;
+ bool userclip_active:1;
+};
+
/* A big lookup table is used to figure out which and how many
* additional regs will inserted before the main payload in the WM
* program execution. These mainly relate to depth and stencil
@@ -871,6 +892,19 @@ struct brw_gs_prog_data
unsigned char transform_feedback_swizzles[64 /* BRW_MAX_SOL_BINDINGS */];
};
+struct brw_sf_prog_data {
+ uint32_t urb_read_length;
+ uint32_t total_grf;
+
+ /* Each vertex may have upto 12 attributes, 4 components each,
+ * except WPOS which requires only 2. (11*4 + 2) == 44 ==> 11
+ * rows.
+ *
+ * Actually we use 4 for each, so call it 12 rows.
+ */
+ unsigned urb_entry_size;
+};
+
#define DEFINE_PROG_DATA_DOWNCAST(stage) \
static inline struct brw_##stage##_prog_data * \
brw_##stage##_prog_data(struct brw_stage_prog_data *prog_data) \
@@ -961,6 +995,22 @@ brw_compile_gs(const struct brw_compiler *compiler, void *log_data,
char **error_str);
/**
+ * Compile a strips and fans shader.
+ *
+ * This is a fixed-function shader determined entirely by the shader key and
+ * a VUE map.
+ *
+ * Returns the final assembly and the program's size.
+ */
+const unsigned *
+brw_compile_sf(const struct brw_compiler *compiler,
+ void *mem_ctx,
+ const struct brw_sf_prog_key *key,
+ struct brw_sf_prog_data *prog_data,
+ struct brw_vue_map *vue_map,
+ unsigned *final_assembly_size);
+
+/**
* Compile a fragment shader.
*
* Returns the final assembly and the program's size.
diff --git a/src/intel/compiler/brw_eu_defines.h b/src/intel/compiler/brw_eu_defines.h
index ccc838d9c51..1af835d47ed 100644
--- a/src/intel/compiler/brw_eu_defines.h
+++ b/src/intel/compiler/brw_eu_defines.h
@@ -77,6 +77,8 @@
#define URB_WRITE_PRIM_START 0x2
#define URB_WRITE_PRIM_TYPE_SHIFT 2
+#define BRW_SPRITE_POINT_ENABLE 16
+
# define GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_CUT 0
# define GEN7_GS_CONTROL_DATA_FORMAT_GSCTL_SID 1
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-29 23:36:43 +0000