diff options
Diffstat (limited to 'src/intel/compiler/brw_compile_sf.c')
| -rw-r--r-- | src/intel/compiler/brw_compile_sf.c | 879 |
1 files changed, 879 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; +} |