664 lines
22 KiB
C
664 lines
22 KiB
C
/*
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Copyright (C) Intel Corp. 2006. All Rights Reserved.
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Intel funded Tungsten Graphics to
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develop this 3D driver.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice (including the
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next paragraph) shall be included in all copies or substantial
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portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
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**********************************************************************/
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/*
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* Authors:
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* Keith Whitwell <keithw@vmware.com>
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*/
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#include "main/macros.h"
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#include "main/enums.h"
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#include "program/program.h"
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#include "brw_clip.h"
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#include "brw_prim.h"
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static void release_tmps( struct brw_clip_compile *c )
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{
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c->last_tmp = c->first_tmp;
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}
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void brw_clip_tri_alloc_regs( struct brw_clip_compile *c,
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GLuint nr_verts )
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{
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const struct intel_device_info *devinfo = c->func.devinfo;
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GLuint i = 0,j;
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/* Register usage is static, precompute here:
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*/
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c->reg.R0 = retype(brw_vec8_grf(i, 0), BRW_REGISTER_TYPE_UD); i++;
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if (c->key.nr_userclip) {
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c->reg.fixed_planes = brw_vec4_grf(i, 0);
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i += (6 + c->key.nr_userclip + 1) / 2;
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c->prog_data.curb_read_length = (6 + c->key.nr_userclip + 1) / 2;
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}
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else
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c->prog_data.curb_read_length = 0;
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/* Payload vertices plus space for more generated vertices:
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*/
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for (j = 0; j < nr_verts; j++) {
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c->reg.vertex[j] = brw_vec4_grf(i, 0);
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i += c->nr_regs;
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}
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if (c->vue_map.num_slots % 2 && nr_verts > 0) {
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/* The VUE has an odd number of slots so the last register is only half
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* used. Fill the second half with zero.
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*/
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for (j = 0; j < 3; j++) {
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GLuint delta = brw_vue_slot_to_offset(c->vue_map.num_slots);
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brw_MOV(&c->func, byte_offset(c->reg.vertex[j], delta), brw_imm_f(0));
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}
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}
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c->reg.t = brw_vec1_grf(i, 0);
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c->reg.loopcount = retype(brw_vec1_grf(i, 1), BRW_REGISTER_TYPE_D);
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c->reg.nr_verts = retype(brw_vec1_grf(i, 2), BRW_REGISTER_TYPE_UD);
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c->reg.planemask = retype(brw_vec1_grf(i, 3), BRW_REGISTER_TYPE_UD);
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c->reg.plane_equation = brw_vec4_grf(i, 4);
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i++;
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c->reg.dpPrev = brw_vec1_grf(i, 0); /* fixme - dp4 will clobber r.1,2,3 */
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c->reg.dp = brw_vec1_grf(i, 4);
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i++;
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c->reg.inlist = brw_uw16_reg(BRW_GENERAL_REGISTER_FILE, i, 0);
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i++;
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c->reg.outlist = brw_uw16_reg(BRW_GENERAL_REGISTER_FILE, i, 0);
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i++;
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c->reg.freelist = brw_uw16_reg(BRW_GENERAL_REGISTER_FILE, i, 0);
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i++;
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if (!c->key.nr_userclip) {
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c->reg.fixed_planes = brw_vec8_grf(i, 0);
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i++;
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}
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if (c->key.do_unfilled) {
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c->reg.dir = brw_vec4_grf(i, 0);
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c->reg.offset = brw_vec4_grf(i, 4);
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i++;
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c->reg.tmp0 = brw_vec4_grf(i, 0);
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c->reg.tmp1 = brw_vec4_grf(i, 4);
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i++;
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}
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c->reg.vertex_src_mask = retype(brw_vec1_grf(i, 0), BRW_REGISTER_TYPE_UD);
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c->reg.clipdistance_offset = retype(brw_vec1_grf(i, 1), BRW_REGISTER_TYPE_W);
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i++;
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if (devinfo->ver == 5) {
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c->reg.ff_sync = retype(brw_vec1_grf(i, 0), BRW_REGISTER_TYPE_UD);
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i++;
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}
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c->first_tmp = i;
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c->last_tmp = i;
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c->prog_data.urb_read_length = c->nr_regs; /* ? */
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c->prog_data.total_grf = i;
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}
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void brw_clip_tri_init_vertices( struct brw_clip_compile *c )
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{
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struct brw_codegen *p = &c->func;
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struct brw_reg tmp0 = c->reg.loopcount; /* handy temporary */
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/* Initial list of indices for incoming vertices:
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*/
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brw_AND(p, tmp0, get_element_ud(c->reg.R0, 2), brw_imm_ud(PRIM_MASK));
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brw_CMP(p,
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vec1(brw_null_reg()),
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BRW_CONDITIONAL_EQ,
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tmp0,
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brw_imm_ud(_3DPRIM_TRISTRIP_REVERSE));
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/* XXX: Is there an easier way to do this? Need to reverse every
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* second tristrip element: Can ignore sometimes?
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*/
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brw_IF(p, BRW_EXECUTE_1);
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{
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brw_MOV(p, get_element(c->reg.inlist, 0), brw_address(c->reg.vertex[1]) );
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brw_MOV(p, get_element(c->reg.inlist, 1), brw_address(c->reg.vertex[0]) );
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if (c->need_direction)
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brw_MOV(p, c->reg.dir, brw_imm_f(-1));
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}
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brw_ELSE(p);
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{
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brw_MOV(p, get_element(c->reg.inlist, 0), brw_address(c->reg.vertex[0]) );
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brw_MOV(p, get_element(c->reg.inlist, 1), brw_address(c->reg.vertex[1]) );
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if (c->need_direction)
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brw_MOV(p, c->reg.dir, brw_imm_f(1));
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}
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brw_ENDIF(p);
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brw_MOV(p, get_element(c->reg.inlist, 2), brw_address(c->reg.vertex[2]) );
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brw_MOV(p, brw_vec8_grf(c->reg.outlist.nr, 0), brw_imm_f(0));
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brw_MOV(p, c->reg.nr_verts, brw_imm_ud(3));
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}
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void brw_clip_tri_flat_shade( struct brw_clip_compile *c )
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{
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struct brw_codegen *p = &c->func;
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struct brw_reg tmp0 = c->reg.loopcount; /* handy temporary */
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brw_AND(p, tmp0, get_element_ud(c->reg.R0, 2), brw_imm_ud(PRIM_MASK));
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brw_CMP(p,
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vec1(brw_null_reg()),
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BRW_CONDITIONAL_EQ,
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tmp0,
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brw_imm_ud(_3DPRIM_POLYGON));
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brw_IF(p, BRW_EXECUTE_1);
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{
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brw_clip_copy_flatshaded_attributes(c, 1, 0);
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brw_clip_copy_flatshaded_attributes(c, 2, 0);
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}
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brw_ELSE(p);
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{
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if (c->key.pv_first) {
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brw_CMP(p,
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vec1(brw_null_reg()),
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BRW_CONDITIONAL_EQ,
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tmp0,
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brw_imm_ud(_3DPRIM_TRIFAN));
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brw_IF(p, BRW_EXECUTE_1);
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{
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brw_clip_copy_flatshaded_attributes(c, 0, 1);
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brw_clip_copy_flatshaded_attributes(c, 2, 1);
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}
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brw_ELSE(p);
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{
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brw_clip_copy_flatshaded_attributes(c, 1, 0);
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brw_clip_copy_flatshaded_attributes(c, 2, 0);
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}
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brw_ENDIF(p);
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}
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else {
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brw_clip_copy_flatshaded_attributes(c, 0, 2);
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brw_clip_copy_flatshaded_attributes(c, 1, 2);
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}
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}
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brw_ENDIF(p);
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}
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/**
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* Loads the clip distance for a vertex into `dst`, and ends with
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* a comparison of it to zero with the condition `cond`.
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*
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* - If using a fixed plane, the distance is dot(hpos, plane).
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* - If using a user clip plane, the distance is directly available in the vertex.
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*/
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static inline void
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load_clip_distance(struct brw_clip_compile *c, struct brw_indirect vtx,
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struct brw_reg dst, GLuint hpos_offset, int cond)
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{
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struct brw_codegen *p = &c->func;
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dst = vec4(dst);
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brw_AND(p, vec1(brw_null_reg()), c->reg.vertex_src_mask, brw_imm_ud(1));
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brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ);
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brw_IF(p, BRW_EXECUTE_1);
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{
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struct brw_indirect temp_ptr = brw_indirect(7, 0);
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brw_ADD(p, get_addr_reg(temp_ptr), get_addr_reg(vtx), c->reg.clipdistance_offset);
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brw_MOV(p, vec1(dst), deref_1f(temp_ptr, 0));
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}
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brw_ELSE(p);
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{
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brw_MOV(p, dst, deref_4f(vtx, hpos_offset));
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brw_DP4(p, dst, dst, c->reg.plane_equation);
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}
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brw_ENDIF(p);
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brw_CMP(p, brw_null_reg(), cond, vec1(dst), brw_imm_f(0.0f));
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}
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/* Use mesa's clipping algorithms, translated to GFX4 assembly.
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*/
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void brw_clip_tri( struct brw_clip_compile *c )
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{
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struct brw_codegen *p = &c->func;
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struct brw_indirect vtx = brw_indirect(0, 0);
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struct brw_indirect vtxPrev = brw_indirect(1, 0);
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struct brw_indirect vtxOut = brw_indirect(2, 0);
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struct brw_indirect plane_ptr = brw_indirect(3, 0);
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struct brw_indirect inlist_ptr = brw_indirect(4, 0);
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struct brw_indirect outlist_ptr = brw_indirect(5, 0);
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struct brw_indirect freelist_ptr = brw_indirect(6, 0);
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GLuint hpos_offset = brw_varying_to_offset(&c->vue_map, VARYING_SLOT_POS);
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GLint clipdist0_offset = c->key.nr_userclip
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? brw_varying_to_offset(&c->vue_map, VARYING_SLOT_CLIP_DIST0)
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: 0;
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brw_MOV(p, get_addr_reg(vtxPrev), brw_address(c->reg.vertex[2]) );
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brw_MOV(p, get_addr_reg(plane_ptr), brw_clip_plane0_address(c));
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brw_MOV(p, get_addr_reg(inlist_ptr), brw_address(c->reg.inlist));
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brw_MOV(p, get_addr_reg(outlist_ptr), brw_address(c->reg.outlist));
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brw_MOV(p, get_addr_reg(freelist_ptr), brw_address(c->reg.vertex[3]) );
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/* Set the initial vertex source mask: The first 6 planes are the bounds
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* of the view volume; the next 8 planes are the user clipping planes.
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*/
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brw_MOV(p, c->reg.vertex_src_mask, brw_imm_ud(0x3fc0));
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/* Set the initial clipdistance offset to be 6 floats before gl_ClipDistance[0].
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* We'll increment 6 times before we start hitting actual user clipping. */
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brw_MOV(p, c->reg.clipdistance_offset, brw_imm_d(clipdist0_offset - 6*sizeof(float)));
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brw_DO(p, BRW_EXECUTE_1);
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{
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/* if (planemask & 1)
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*/
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brw_AND(p, vec1(brw_null_reg()), c->reg.planemask, brw_imm_ud(1));
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brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ);
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brw_IF(p, BRW_EXECUTE_1);
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{
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/* vtxOut = freelist_ptr++
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*/
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brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(freelist_ptr) );
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brw_ADD(p, get_addr_reg(freelist_ptr), get_addr_reg(freelist_ptr), brw_imm_uw(c->nr_regs * REG_SIZE));
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if (c->key.nr_userclip)
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brw_MOV(p, c->reg.plane_equation, deref_4f(plane_ptr, 0));
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else
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brw_MOV(p, c->reg.plane_equation, deref_4b(plane_ptr, 0));
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brw_MOV(p, c->reg.loopcount, c->reg.nr_verts);
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brw_MOV(p, c->reg.nr_verts, brw_imm_ud(0));
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brw_DO(p, BRW_EXECUTE_1);
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{
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/* vtx = *input_ptr;
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*/
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brw_MOV(p, get_addr_reg(vtx), deref_1uw(inlist_ptr, 0));
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load_clip_distance(c, vtxPrev, c->reg.dpPrev, hpos_offset, BRW_CONDITIONAL_L);
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/* (prev < 0.0f) */
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brw_IF(p, BRW_EXECUTE_1);
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{
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load_clip_distance(c, vtx, c->reg.dp, hpos_offset, BRW_CONDITIONAL_GE);
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/* IS_POSITIVE(next)
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*/
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brw_IF(p, BRW_EXECUTE_1);
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{
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/* Coming back in.
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*/
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brw_ADD(p, c->reg.t, c->reg.dpPrev, negate(c->reg.dp));
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brw_math_invert(p, c->reg.t, c->reg.t);
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brw_MUL(p, c->reg.t, c->reg.t, c->reg.dpPrev);
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/* If (vtxOut == 0) vtxOut = vtxPrev
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*/
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brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_EQ, get_addr_reg(vtxOut), brw_imm_uw(0) );
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brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(vtxPrev));
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brw_inst_set_pred_control(p->devinfo, brw_last_inst,
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BRW_PREDICATE_NORMAL);
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brw_clip_interp_vertex(c, vtxOut, vtxPrev, vtx, c->reg.t, false);
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/* *outlist_ptr++ = vtxOut;
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* nr_verts++;
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* vtxOut = 0;
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*/
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brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxOut));
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brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short)));
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brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1));
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brw_MOV(p, get_addr_reg(vtxOut), brw_imm_uw(0) );
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}
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brw_ENDIF(p);
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}
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brw_ELSE(p);
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{
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/* *outlist_ptr++ = vtxPrev;
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* nr_verts++;
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*/
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brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxPrev));
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brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short)));
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brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1));
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load_clip_distance(c, vtx, c->reg.dp, hpos_offset, BRW_CONDITIONAL_L);
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/* (next < 0.0f)
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*/
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brw_IF(p, BRW_EXECUTE_1);
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{
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/* Going out of bounds. Avoid division by zero as we
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* know dp != dpPrev from DIFFERENT_SIGNS, above.
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*/
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brw_ADD(p, c->reg.t, c->reg.dp, negate(c->reg.dpPrev));
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brw_math_invert(p, c->reg.t, c->reg.t);
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brw_MUL(p, c->reg.t, c->reg.t, c->reg.dp);
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/* If (vtxOut == 0) vtxOut = vtx
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*/
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brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_EQ, get_addr_reg(vtxOut), brw_imm_uw(0) );
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brw_MOV(p, get_addr_reg(vtxOut), get_addr_reg(vtx));
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brw_inst_set_pred_control(p->devinfo, brw_last_inst,
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BRW_PREDICATE_NORMAL);
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brw_clip_interp_vertex(c, vtxOut, vtx, vtxPrev, c->reg.t, true);
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/* *outlist_ptr++ = vtxOut;
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* nr_verts++;
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* vtxOut = 0;
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*/
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brw_MOV(p, deref_1uw(outlist_ptr, 0), get_addr_reg(vtxOut));
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brw_ADD(p, get_addr_reg(outlist_ptr), get_addr_reg(outlist_ptr), brw_imm_uw(sizeof(short)));
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brw_ADD(p, c->reg.nr_verts, c->reg.nr_verts, brw_imm_ud(1));
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brw_MOV(p, get_addr_reg(vtxOut), brw_imm_uw(0) );
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}
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brw_ENDIF(p);
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}
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brw_ENDIF(p);
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/* vtxPrev = vtx;
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* inlist_ptr++;
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*/
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brw_MOV(p, get_addr_reg(vtxPrev), get_addr_reg(vtx));
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brw_ADD(p, get_addr_reg(inlist_ptr), get_addr_reg(inlist_ptr), brw_imm_uw(sizeof(short)));
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/* while (--loopcount != 0)
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*/
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brw_ADD(p, c->reg.loopcount, c->reg.loopcount, brw_imm_d(-1));
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brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ);
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}
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brw_WHILE(p);
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brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
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/* vtxPrev = *(outlist_ptr-1) OR: outlist[nr_verts-1]
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* inlist = outlist
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* inlist_ptr = &inlist[0]
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* outlist_ptr = &outlist[0]
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*/
|
|
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);
|
|
}
|
|
|
|
|
|
|
|
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);
|
|
}
|
|
|
|
static void do_clip_tri( struct brw_clip_compile *c )
|
|
{
|
|
brw_clip_init_planes(c);
|
|
|
|
brw_clip_tri(c);
|
|
}
|
|
|
|
|
|
static void maybe_do_clip_tri( struct brw_clip_compile *c )
|
|
{
|
|
struct brw_codegen *p = &c->func;
|
|
|
|
brw_CMP(p, vec1(brw_null_reg()), BRW_CONDITIONAL_NZ, c->reg.planemask, brw_imm_ud(0));
|
|
brw_IF(p, BRW_EXECUTE_1);
|
|
{
|
|
do_clip_tri(c);
|
|
}
|
|
brw_ENDIF(p);
|
|
}
|
|
|
|
static void brw_clip_test( struct brw_clip_compile *c )
|
|
{
|
|
struct brw_reg t = retype(get_tmp(c), BRW_REGISTER_TYPE_UD);
|
|
struct brw_reg t1 = retype(get_tmp(c), BRW_REGISTER_TYPE_UD);
|
|
struct brw_reg t2 = retype(get_tmp(c), BRW_REGISTER_TYPE_UD);
|
|
struct brw_reg t3 = retype(get_tmp(c), BRW_REGISTER_TYPE_UD);
|
|
|
|
struct brw_reg v0 = get_tmp(c);
|
|
struct brw_reg v1 = get_tmp(c);
|
|
struct brw_reg v2 = get_tmp(c);
|
|
|
|
struct brw_indirect vt0 = brw_indirect(0, 0);
|
|
struct brw_indirect vt1 = brw_indirect(1, 0);
|
|
struct brw_indirect vt2 = brw_indirect(2, 0);
|
|
|
|
struct brw_codegen *p = &c->func;
|
|
struct brw_reg tmp0 = c->reg.loopcount; /* handy temporary */
|
|
|
|
GLuint hpos_offset = brw_varying_to_offset(&c->vue_map,
|
|
VARYING_SLOT_POS);
|
|
|
|
brw_MOV(p, get_addr_reg(vt0), brw_address(c->reg.vertex[0]));
|
|
brw_MOV(p, get_addr_reg(vt1), brw_address(c->reg.vertex[1]));
|
|
brw_MOV(p, get_addr_reg(vt2), brw_address(c->reg.vertex[2]));
|
|
brw_MOV(p, v0, deref_4f(vt0, hpos_offset));
|
|
brw_MOV(p, v1, deref_4f(vt1, hpos_offset));
|
|
brw_MOV(p, v2, deref_4f(vt2, hpos_offset));
|
|
brw_AND(p, c->reg.planemask, c->reg.planemask, brw_imm_ud(~0x3f));
|
|
|
|
/* test nearz, xmin, ymin plane */
|
|
/* clip.xyz < -clip.w */
|
|
brw_CMP(p, t1, BRW_CONDITIONAL_L, v0, negate(get_element(v0, 3)));
|
|
brw_CMP(p, t2, BRW_CONDITIONAL_L, v1, negate(get_element(v1, 3)));
|
|
brw_CMP(p, t3, BRW_CONDITIONAL_L, v2, negate(get_element(v2, 3)));
|
|
|
|
/* All vertices are outside of a plane, rejected */
|
|
brw_AND(p, t, t1, t2);
|
|
brw_AND(p, t, t, t3);
|
|
brw_OR(p, tmp0, get_element(t, 0), get_element(t, 1));
|
|
brw_OR(p, tmp0, tmp0, get_element(t, 2));
|
|
brw_AND(p, brw_null_reg(), tmp0, brw_imm_ud(0x1));
|
|
brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ);
|
|
brw_IF(p, BRW_EXECUTE_1);
|
|
{
|
|
brw_clip_kill_thread(c);
|
|
}
|
|
brw_ENDIF(p);
|
|
brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
|
|
|
|
/* some vertices are inside a plane, some are outside,need to clip */
|
|
brw_XOR(p, t, t1, t2);
|
|
brw_XOR(p, t1, t2, t3);
|
|
brw_OR(p, t, t, t1);
|
|
brw_AND(p, t, t, brw_imm_ud(0x1));
|
|
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ,
|
|
get_element(t, 0), brw_imm_ud(0));
|
|
brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<5)));
|
|
brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
|
|
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ,
|
|
get_element(t, 1), brw_imm_ud(0));
|
|
brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<3)));
|
|
brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
|
|
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ,
|
|
get_element(t, 2), brw_imm_ud(0));
|
|
brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<1)));
|
|
brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
|
|
|
|
/* test farz, xmax, ymax plane */
|
|
/* clip.xyz > clip.w */
|
|
brw_CMP(p, t1, BRW_CONDITIONAL_G, v0, get_element(v0, 3));
|
|
brw_CMP(p, t2, BRW_CONDITIONAL_G, v1, get_element(v1, 3));
|
|
brw_CMP(p, t3, BRW_CONDITIONAL_G, v2, get_element(v2, 3));
|
|
|
|
/* All vertices are outside of a plane, rejected */
|
|
brw_AND(p, t, t1, t2);
|
|
brw_AND(p, t, t, t3);
|
|
brw_OR(p, tmp0, get_element(t, 0), get_element(t, 1));
|
|
brw_OR(p, tmp0, tmp0, get_element(t, 2));
|
|
brw_AND(p, brw_null_reg(), tmp0, brw_imm_ud(0x1));
|
|
brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ);
|
|
brw_IF(p, BRW_EXECUTE_1);
|
|
{
|
|
brw_clip_kill_thread(c);
|
|
}
|
|
brw_ENDIF(p);
|
|
brw_set_default_predicate_control(p, BRW_PREDICATE_NONE);
|
|
|
|
/* some vertices are inside a plane, some are outside,need to clip */
|
|
brw_XOR(p, t, t1, t2);
|
|
brw_XOR(p, t1, t2, t3);
|
|
brw_OR(p, t, t, t1);
|
|
brw_AND(p, t, t, brw_imm_ud(0x1));
|
|
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ,
|
|
get_element(t, 0), brw_imm_ud(0));
|
|
brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<4)));
|
|
brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
|
|
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ,
|
|
get_element(t, 1), brw_imm_ud(0));
|
|
brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<2)));
|
|
brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
|
|
brw_CMP(p, brw_null_reg(), BRW_CONDITIONAL_NZ,
|
|
get_element(t, 2), brw_imm_ud(0));
|
|
brw_OR(p, c->reg.planemask, c->reg.planemask, brw_imm_ud((1<<0)));
|
|
brw_inst_set_pred_control(p->devinfo, brw_last_inst, BRW_PREDICATE_NORMAL);
|
|
|
|
release_tmps(c);
|
|
}
|
|
|
|
|
|
void brw_emit_tri_clip( struct brw_clip_compile *c )
|
|
{
|
|
struct brw_codegen *p = &c->func;
|
|
brw_clip_tri_alloc_regs(c, 3 + c->key.nr_userclip + 6);
|
|
brw_clip_tri_init_vertices(c);
|
|
brw_clip_init_clipmask(c);
|
|
brw_clip_init_ff_sync(c);
|
|
|
|
/* if -ve rhw workaround bit is set,
|
|
do cliptest */
|
|
if (p->devinfo->has_negative_rhw_bug) {
|
|
brw_AND(p, brw_null_reg(), get_element_ud(c->reg.R0, 2),
|
|
brw_imm_ud(1<<20));
|
|
brw_inst_set_cond_modifier(p->devinfo, brw_last_inst, BRW_CONDITIONAL_NZ);
|
|
brw_IF(p, BRW_EXECUTE_1);
|
|
{
|
|
brw_clip_test(c);
|
|
}
|
|
brw_ENDIF(p);
|
|
}
|
|
/* Can't push into do_clip_tri because with polygon (or quad)
|
|
* flatshading, need to apply the flatshade here because we don't
|
|
* respect the PV when converting to trifan for emit:
|
|
*/
|
|
if (c->key.contains_flat_varying)
|
|
brw_clip_tri_flat_shade(c);
|
|
|
|
if ((c->key.clip_mode == BRW_CLIP_MODE_NORMAL) ||
|
|
(c->key.clip_mode == BRW_CLIP_MODE_KERNEL_CLIP))
|
|
do_clip_tri(c);
|
|
else
|
|
maybe_do_clip_tri(c);
|
|
|
|
brw_clip_tri_emit_polygon(c);
|
|
|
|
/* Send an empty message to kill the thread:
|
|
*/
|
|
brw_clip_kill_thread(c);
|
|
}
|