void brw_clip_tri_emit_polygon(struct brw_clip_compile *c) { struct brw_codegen *p = &c->func; /* for (loopcount = nr_verts-2; loopcount > 0; loopcount--) */ brw_ADD(p, c->reg.loopcount, c->reg.nr_verts, brw_imm_d(-2)); brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_G); brw_IF(p, BRW_EXECUTE_1); { struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect vptr = brw_indirect(1, 0); brw_MOV(p, get_addr_reg(vptr), brw_address(c->reg.inlist)); brw_MOV(p, get_addr_reg(v0), deref_1uw(vptr, 0)); brw_clip_emit_vue(c, v0, BRW_URB_WRITE_ALLOCATE_COMPLETE, ((_3DPRIM_TRIFAN << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_START)); brw_ADD(p, get_addr_reg(vptr), get_addr_reg(vptr), brw_imm_uw(2)); brw_MOV(p, get_addr_reg(v0), deref_1uw(vptr, 0)); brw_DO(p, BRW_EXECUTE_1); { brw_clip_emit_vue(c, v0, BRW_URB_WRITE_ALLOCATE_COMPLETE, (_3DPRIM_TRIFAN << URB_WRITE_PRIM_TYPE_SHIFT)); brw_ADD(p, get_addr_reg(vptr), get_addr_reg(vptr), brw_imm_uw(2)); brw_MOV(p, get_addr_reg(v0), deref_1uw(vptr, 0)); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ); } brw_WHILE(p); brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL); brw_clip_emit_vue(c, v0, BRW_URB_WRITE_EOT_COMPLETE, ((_3DPRIM_TRIFAN << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_END)); } brw_ENDIF(p); }
void brw_clip_tri_emit_polygon(struct brw_clip_compile *c) { struct brw_compile *p = &c->func; /* for (loopcount = nr_verts-2; loopcount > 0; loopcount--) */ brw_set_conditionalmod(p, BRW_CONDITIONAL_G); brw_ADD(p, c->reg.loopcount, c->reg.nr_verts, brw_imm_d(-2)); brw_IF(p, BRW_EXECUTE_1); { struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect vptr = brw_indirect(1, 0); brw_MOV(p, get_addr_reg(vptr), brw_address(c->reg.inlist)); brw_MOV(p, get_addr_reg(v0), deref_1uw(vptr, 0)); brw_clip_emit_vue(c, v0, 1, 0, ((_3DPRIM_TRIFAN << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_START)); brw_ADD(p, get_addr_reg(vptr), get_addr_reg(vptr), brw_imm_uw(2)); brw_MOV(p, get_addr_reg(v0), deref_1uw(vptr, 0)); brw_DO(p, BRW_EXECUTE_1); { brw_clip_emit_vue(c, v0, 1, 0, (_3DPRIM_TRIFAN << URB_WRITE_PRIM_TYPE_SHIFT)); brw_ADD(p, get_addr_reg(vptr), get_addr_reg(vptr), brw_imm_uw(2)); brw_MOV(p, get_addr_reg(v0), deref_1uw(vptr, 0)); brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); } brw_WHILE(p); brw_clip_emit_vue(c, v0, 0, 1, ((_3DPRIM_TRIFAN << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_END)); } brw_ENDIF(p); }
static void emit_points(struct brw_clip_compile *c, bool do_offset ) { struct brw_compile *p = &c->func; const struct brw_context *brw = p->brw; struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect v0ptr = brw_indirect(2, 0); brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); /* draw if edgeflag != 0 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, deref_1f(v0, brw_varying_to_offset(&c->vue_map, VARYING_SLOT_EDGE)), brw_imm_f(0)); brw_IF(p, BRW_EXECUTE_1); { if (do_offset) apply_one_offset(c, v0); brw_clip_emit_vue(c, v0, BRW_URB_WRITE_ALLOCATE_COMPLETE, (_3DPRIM_POINTLIST << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_START | URB_WRITE_PRIM_END); } brw_ENDIF(p); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); brw_inst_set_cond_modifier(brw, brw_last_inst, BRW_CONDITIONAL_NZ); } brw_WHILE(p); brw_inst_set_pred_control(brw, brw_last_inst, BRW_PREDICATE_NORMAL); }
static void emit_points(struct brw_clip_compile *c, bool do_offset ) { struct brw_compile *p = &c->func; struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect v0ptr = brw_indirect(2, 0); brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); /* draw if edgeflag != 0 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, deref_1f(v0, brw_vert_result_to_offset(&c->vue_map, VARYING_SLOT_EDGE)), brw_imm_f(0)); brw_IF(p, BRW_EXECUTE_1); { if (do_offset) apply_one_offset(c, v0); brw_clip_emit_vue(c, v0, 1, 0, (_3DPRIM_POINTLIST << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_START | URB_WRITE_PRIM_END); } brw_ENDIF(p); brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); } brw_WHILE(p); }
static void emit_points(struct brw_clip_compile *c, GLboolean do_offset ) { struct brw_compile *p = &c->func; struct brw_instruction *loop; struct brw_instruction *draw_point; struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect v0ptr = brw_indirect(2, 0); brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); loop = brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); /* draw if edgeflag != 0 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, deref_1f(v0, c->offset[VERT_RESULT_EDGE]), brw_imm_f(0)); draw_point = brw_IF(p, BRW_EXECUTE_1); { if (do_offset) apply_one_offset(c, v0); brw_clip_emit_vue(c, v0, 1, 0, (_3DPRIM_POINTLIST << 2) | R02_PRIM_START | R02_PRIM_END); } brw_ENDIF(p, draw_point); brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); } brw_WHILE(p, loop); }
/* Use mesa's clipping algorithms, translated to GEN4 assembly. */ void brw_clip_tri( struct brw_clip_compile *c ) { struct brw_compile *p = &c->func; struct brw_indirect vtx = brw_indirect(0, 0); struct brw_indirect vtxPrev = brw_indirect(1, 0); struct brw_indirect vtxOut = brw_indirect(2, 0); struct brw_indirect plane_ptr = brw_indirect(3, 0); struct brw_indirect inlist_ptr = brw_indirect(4, 0); struct brw_indirect outlist_ptr = brw_indirect(5, 0); struct brw_indirect freelist_ptr = brw_indirect(6, 0); struct brw_instruction *plane_loop; struct brw_instruction *plane_active; struct brw_instruction *vertex_loop; struct brw_instruction *next_test; struct brw_instruction *prev_test; brw_MOV(p, get_addr_reg(vtxPrev), brw_address(c->reg.vertex[2]) ); brw_MOV(p, get_addr_reg(plane_ptr), brw_clip_plane0_address(c)); brw_MOV(p, get_addr_reg(inlist_ptr), brw_address(c->reg.inlist)); brw_MOV(p, get_addr_reg(outlist_ptr), brw_address(c->reg.outlist)); brw_MOV(p, get_addr_reg(freelist_ptr), brw_address(c->reg.vertex[3]) ); plane_loop = brw_DO(p, BRW_EXECUTE_1); { /* if (planemask & 1) */ brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_AND(p, vec1(brw_null_reg()), c->reg.planemask, brw_imm_ud(1)); plane_active = brw_IF(p, BRW_EXECUTE_1); { /* vtxOut = freelist_ptr++ */ brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(freelist_ptr) ); brw_ADD(p, get_addr_reg(freelist_ptr), get_addr_reg(freelist_ptr), brw_imm_uw(c->nr_regs * REG_SIZE)); if (c->key.nr_userclip) brw_MOV(p, c->reg.plane_equation, deref_4f(plane_ptr, 0)); else brw_MOV(p, c->reg.plane_equation, deref_4b(plane_ptr, 0)); brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, c->reg.nr_verts, brw_imm_ud(0)); vertex_loop = brw_DO(p, BRW_EXECUTE_1); { /* vtx = *input_ptr; */ brw_MOV(p, get_addr_reg(vtx), deref_1uw(inlist_ptr, 0)); /* IS_NEGATIVE(prev) */ brw_set_conditionalmod(p, BRW_CONDITIONAL_L); brw_DP4(p, vec4(c->reg.dpPrev), deref_4f(vtxPrev, c->offset_hpos), c->reg.plane_equation); prev_test = brw_IF(p, BRW_EXECUTE_1); { /* IS_POSITIVE(next) */ brw_set_conditionalmod(p, BRW_CONDITIONAL_GE); brw_DP4(p, vec4(c->reg.dp), deref_4f(vtx, c->offset_hpos), c->reg.plane_equation); next_test = brw_IF(p, BRW_EXECUTE_1); { /* Coming back in. */ brw_ADD(p, c->reg.t, c->reg.dpPrev, negate(c->reg.dp)); brw_math_invert(p, c->reg.t, c->reg.t); brw_MUL(p, c->reg.t, c->reg.t, c->reg.dpPrev); /* If (vtxOut == 0) vtxOut = vtxPrev */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_EQ, get_addr_reg(vtxOut), brw_imm_uw(0) ); brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(vtxPrev) ); brw_set_predicate_control(p, BRW_PREDICATE_NONE); brw_clip_interp_vertex(c, vtxOut, vtxPrev, vtx, c->reg.t, GL_FALSE); /* *outlist_ptr++ = vtxOut; * nr_verts++; * vtxOut = 0; */ brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxOut)); brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short))); brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1)); brw_MOV(p, get_addr_reg(vtxOut), brw_imm_uw(0) ); } brw_ENDIF(p, next_test); } prev_test = brw_ELSE(p, prev_test); { /* *outlist_ptr++ = vtxPrev; * nr_verts++; */ brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxPrev)); brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short))); brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1)); /* IS_NEGATIVE(next) */ brw_set_conditionalmod(p, BRW_CONDITIONAL_L); brw_DP4(p, vec4(c->reg.dp), deref_4f(vtx, c->offset_hpos), c->reg.plane_equation); next_test = brw_IF(p, BRW_EXECUTE_1); { /* Going out of bounds. Avoid division by zero as we * know dp != dpPrev from DIFFERENT_SIGNS, above. */ brw_ADD(p, c->reg.t, c->reg.dp, negate(c->reg.dpPrev)); brw_math_invert(p, c->reg.t, c->reg.t); brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp); /* If (vtxOut == 0) vtxOut = vtx */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_EQ, get_addr_reg(vtxOut), brw_imm_uw(0) ); brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(vtx) ); brw_set_predicate_control(p, BRW_PREDICATE_NONE); brw_clip_interp_vertex(c, vtxOut, vtx, vtxPrev, c->reg.t, GL_TRUE); /* *outlist_ptr++ = vtxOut; * nr_verts++; * vtxOut = 0; */ brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxOut)); brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short))); brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1)); brw_MOV(p, get_addr_reg(vtxOut), brw_imm_uw(0) ); } brw_ENDIF(p, next_test); } brw_ENDIF(p, prev_test); /* vtxPrev = vtx; * inlist_ptr++; */ brw_MOV(p, get_addr_reg(vtxPrev), get_addr_reg(vtx)); brw_ADD(p, get_addr_reg(inlist_ptr), get_addr_reg(inlist_ptr), brw_imm_uw(sizeof(short))); /* while (--loopcount != 0) */ brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); } brw_WHILE(p, vertex_loop); /* vtxPrev = *(outlist_ptr-1) OR: outlist[nr_verts-1] * inlist = outlist * inlist_ptr = &inlist[0] * outlist_ptr = &outlist[0] */ brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_w(-2)); brw_MOV(p, get_addr_reg(vtxPrev), deref_1uw(outlist_ptr, 0)); brw_MOV(p, brw_vec8_grf(c->reg.inlist.nr, 0), brw_vec8_grf(c->reg.outlist.nr, 0)); brw_MOV(p, get_addr_reg(inlist_ptr), brw_address(c->reg.inlist)); brw_MOV(p, get_addr_reg(outlist_ptr), brw_address(c->reg.outlist)); } brw_ENDIF(p, plane_active); /* plane_ptr++; */ brw_ADD(p, get_addr_reg(plane_ptr), get_addr_reg(plane_ptr), brw_clip_plane_stride(c)); /* nr_verts >= 3 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_GE, c->reg.nr_verts, brw_imm_ud(3)); /* && (planemask>>=1) != 0 */ brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_SHR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(1)); } brw_WHILE(p, plane_loop); }
/*********************************************************************** * Output clipped polygon as an unfilled primitive: */ static void emit_lines(struct brw_clip_compile *c, bool do_offset) { struct brw_compile *p = &c->func; const struct brw_context *brw = p->brw; struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect v1 = brw_indirect(1, 0); struct brw_indirect v0ptr = brw_indirect(2, 0); struct brw_indirect v1ptr = brw_indirect(3, 0); /* Need a seperate loop for offset: */ if (do_offset) { brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); apply_one_offset(c, v0); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); brw_inst_set_cond_modifier(brw, brw_last_inst, BRW_CONDITIONAL_G); } brw_WHILE(p); brw_inst_set_pred_control(brw, brw_last_inst, BRW_PREDICATE_NORMAL); } /* v1ptr = &inlist[nr_verts] * *v1ptr = v0 */ brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); brw_ADD(p, get_addr_reg(v1ptr), get_addr_reg(v0ptr), retype(c->reg.nr_verts, BRW_REGISTER_TYPE_UW)); brw_ADD(p, get_addr_reg(v1ptr), get_addr_reg(v1ptr), retype(c->reg.nr_verts, BRW_REGISTER_TYPE_UW)); brw_MOV(p, deref_1uw(v1ptr, 0), deref_1uw(v0ptr, 0)); brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_MOV(p, get_addr_reg(v1), deref_1uw(v0ptr, 2)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); /* draw edge if edgeflag != 0 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, deref_1f(v0, brw_varying_to_offset(&c->vue_map, VARYING_SLOT_EDGE)), brw_imm_f(0)); brw_IF(p, BRW_EXECUTE_1); { brw_clip_emit_vue(c, v0, BRW_URB_WRITE_ALLOCATE_COMPLETE, (_3DPRIM_LINESTRIP << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_START); brw_clip_emit_vue(c, v1, BRW_URB_WRITE_ALLOCATE_COMPLETE, (_3DPRIM_LINESTRIP << URB_WRITE_PRIM_TYPE_SHIFT) | URB_WRITE_PRIM_END); } brw_ENDIF(p); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); brw_inst_set_cond_modifier(brw, brw_last_inst, BRW_CONDITIONAL_NZ); } brw_WHILE(p); brw_inst_set_pred_control(brw, brw_last_inst, BRW_PREDICATE_NORMAL); }
/* Use mesa's clipping algorithms, translated to GEN4 assembly. */ void brw_clip_tri( struct brw_clip_compile *c ) { struct brw_codegen *p = &c->func; struct brw_indirect vtx = brw_indirect(0, 0); struct brw_indirect vtxPrev = brw_indirect(1, 0); struct brw_indirect vtxOut = brw_indirect(2, 0); struct brw_indirect plane_ptr = brw_indirect(3, 0); struct brw_indirect inlist_ptr = brw_indirect(4, 0); struct brw_indirect outlist_ptr = brw_indirect(5, 0); struct brw_indirect freelist_ptr = brw_indirect(6, 0); GLuint hpos_offset = brw_varying_to_offset(&c->vue_map, VARYING_SLOT_POS); GLint clipdist0_offset = c->key.nr_userclip ? brw_varying_to_offset(&c->vue_map, VARYING_SLOT_CLIP_DIST0) : 0; brw_MOV(p, get_addr_reg(vtxPrev), brw_address(c->reg.vertex[2]) ); brw_MOV(p, get_addr_reg(plane_ptr), brw_clip_plane0_address(c)); brw_MOV(p, get_addr_reg(inlist_ptr), brw_address(c->reg.inlist)); brw_MOV(p, get_addr_reg(outlist_ptr), brw_address(c->reg.outlist)); brw_MOV(p, get_addr_reg(freelist_ptr), brw_address(c->reg.vertex[3]) ); /* Set the initial vertex source mask: The first 6 planes are the bounds * of the view volume; the next 8 planes are the user clipping planes. */ brw_MOV(p, c->reg.vertex_src_mask, brw_imm_ud(0x3fc0)); /* Set the initial clipdistance offset to be 6 floats before gl_ClipDistance[0]. * We'll increment 6 times before we start hitting actual user clipping. */ brw_MOV(p, c->reg.clipdistance_offset, brw_imm_d(clipdist0_offset - 6*sizeof(float))); brw_DO(p, BRW_EXECUTE_1); { /* if (planemask & 1) */ brw_AND(p, vec1(brw_null_reg()), c->reg.planemask, brw_imm_ud(1)); brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ); brw_IF(p, BRW_EXECUTE_1); { /* vtxOut = freelist_ptr++ */ brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(freelist_ptr) ); brw_ADD(p, get_addr_reg(freelist_ptr), get_addr_reg(freelist_ptr), brw_imm_uw(c->nr_regs * REG_SIZE)); if (c->key.nr_userclip) brw_MOV(p, c->reg.plane_equation, deref_4f(plane_ptr, 0)); else brw_MOV(p, c->reg.plane_equation, deref_4b(plane_ptr, 0)); brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, c->reg.nr_verts, brw_imm_ud(0)); brw_DO(p, BRW_EXECUTE_1); { /* vtx = *input_ptr; */ brw_MOV(p, get_addr_reg(vtx), deref_1uw(inlist_ptr, 0)); load_clip_distance(c, vtxPrev, c->reg.dpPrev, hpos_offset, BRW_CONDITIONAL_L); /* (prev < 0.0f) */ brw_IF(p, BRW_EXECUTE_1); { load_clip_distance(c, vtx, c->reg.dp, hpos_offset, BRW_CONDITIONAL_GE); /* IS_POSITIVE(next) */ brw_IF(p, BRW_EXECUTE_1); { /* Coming back in. */ brw_ADD(p, c->reg.t, c->reg.dpPrev, negate(c->reg.dp)); brw_math_invert(p, c->reg.t, c->reg.t); brw_MUL(p, c->reg.t, c->reg.t, c->reg.dpPrev); /* If (vtxOut == 0) vtxOut = vtxPrev */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_EQ, get_addr_reg(vtxOut), brw_imm_uw(0) ); brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(vtxPrev)); brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL); brw_clip_interp_vertex(c, vtxOut, vtxPrev, vtx, c->reg.t, false); /* *outlist_ptr++ = vtxOut; * nr_verts++; * vtxOut = 0; */ brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxOut)); brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short))); brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1)); brw_MOV(p, get_addr_reg(vtxOut), brw_imm_uw(0) ); } brw_ENDIF(p); } brw_ELSE(p); { /* *outlist_ptr++ = vtxPrev; * nr_verts++; */ brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxPrev)); brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short))); brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1)); load_clip_distance(c, vtx, c->reg.dp, hpos_offset, BRW_CONDITIONAL_L); /* (next < 0.0f) */ brw_IF(p, BRW_EXECUTE_1); { /* Going out of bounds. Avoid division by zero as we * know dp != dpPrev from DIFFERENT_SIGNS, above. */ brw_ADD(p, c->reg.t, c->reg.dp, negate(c->reg.dpPrev)); brw_math_invert(p, c->reg.t, c->reg.t); brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp); /* If (vtxOut == 0) vtxOut = vtx */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_EQ, get_addr_reg(vtxOut), brw_imm_uw(0) ); brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(vtx)); brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL); brw_clip_interp_vertex(c, vtxOut, vtx, vtxPrev, c->reg.t, true); /* *outlist_ptr++ = vtxOut; * nr_verts++; * vtxOut = 0; */ brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxOut)); brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short))); brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1)); brw_MOV(p, get_addr_reg(vtxOut), brw_imm_uw(0) ); } brw_ENDIF(p); } brw_ENDIF(p); /* vtxPrev = vtx; * inlist_ptr++; */ brw_MOV(p, get_addr_reg(vtxPrev), get_addr_reg(vtx)); brw_ADD(p, get_addr_reg(inlist_ptr), get_addr_reg(inlist_ptr), brw_imm_uw(sizeof(short))); /* while (--loopcount != 0) */ brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ); } brw_WHILE(p); brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL); /* vtxPrev = *(outlist_ptr-1) OR: outlist[nr_verts-1] * inlist = outlist * inlist_ptr = &inlist[0] * outlist_ptr = &outlist[0] */ brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_w(-2)); brw_MOV(p, get_addr_reg(vtxPrev), deref_1uw(outlist_ptr, 0)); brw_MOV(p, brw_vec8_grf(c->reg.inlist.nr, 0), brw_vec8_grf(c->reg.outlist.nr, 0)); brw_MOV(p, get_addr_reg(inlist_ptr), brw_address(c->reg.inlist)); brw_MOV(p, get_addr_reg(outlist_ptr), brw_address(c->reg.outlist)); } brw_ENDIF(p); /* plane_ptr++; */ brw_ADD(p, get_addr_reg(plane_ptr), get_addr_reg(plane_ptr), brw_clip_plane_stride(c)); /* nr_verts >= 3 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_GE, c->reg.nr_verts, brw_imm_ud(3)); brw_set_default_predicate_control(p, BRW_PREDICATE_NORMAL); /* && (planemask>>=1) != 0 */ brw_SHR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(1)); brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ); brw_SHR(p, c->reg.vertex_src_mask, c->reg.vertex_src_mask, brw_imm_ud(1)); brw_ADD(p, c->reg.clipdistance_offset, c->reg.clipdistance_offset, brw_imm_w(sizeof(float))); } brw_WHILE(p); brw_set_default_predicate_control(p, BRW_PREDICATE_NONE); }
/*********************************************************************** * Output clipped polygon as an unfilled primitive: */ static void emit_lines(struct brw_clip_compile *c, GLboolean do_offset) { struct brw_compile *p = &c->func; struct brw_instruction *loop; struct brw_instruction *draw_edge; struct brw_indirect v0 = brw_indirect(0, 0); struct brw_indirect v1 = brw_indirect(1, 0); struct brw_indirect v0ptr = brw_indirect(2, 0); struct brw_indirect v1ptr = brw_indirect(3, 0); /* Need a seperate loop for offset: */ if (do_offset) { brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); loop = brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); apply_one_offset(c, v0); brw_set_conditionalmod(p, BRW_CONDITIONAL_G); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); } brw_WHILE(p, loop); } /* v1ptr = &inlist[nr_verts] * *v1ptr = v0 */ brw_MOV(p, c->reg.loopcount, c->reg.nr_verts); brw_MOV(p, get_addr_reg(v0ptr), brw_address(c->reg.inlist)); brw_ADD(p, get_addr_reg(v1ptr), get_addr_reg(v0ptr), retype(c->reg.nr_verts, BRW_REGISTER_TYPE_UW)); brw_ADD(p, get_addr_reg(v1ptr), get_addr_reg(v1ptr), retype(c->reg.nr_verts, BRW_REGISTER_TYPE_UW)); brw_MOV(p, deref_1uw(v1ptr, 0), deref_1uw(v0ptr, 0)); loop = brw_DO(p, BRW_EXECUTE_1); { brw_MOV(p, get_addr_reg(v0), deref_1uw(v0ptr, 0)); brw_MOV(p, get_addr_reg(v1), deref_1uw(v0ptr, 2)); brw_ADD(p, get_addr_reg(v0ptr), get_addr_reg(v0ptr), brw_imm_uw(2)); /* draw edge if edgeflag != 0 */ brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, deref_1f(v0, c->offset[VERT_RESULT_EDGE]), brw_imm_f(0)); draw_edge = brw_IF(p, BRW_EXECUTE_1); { brw_clip_emit_vue(c, v0, 1, 0, (_3DPRIM_LINESTRIP << 2) | R02_PRIM_START); brw_clip_emit_vue(c, v1, 1, 0, (_3DPRIM_LINESTRIP << 2) | R02_PRIM_END); } brw_ENDIF(p, draw_edge); brw_set_conditionalmod(p, BRW_CONDITIONAL_NZ); brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1)); } brw_WHILE(p, loop); }