/* * 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 "dev/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<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; }