OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

r300/compiler: use perspective division only for TXP in shadow samplers

Browse Source
This commit is contained in:
Marek Olšák
2010-05-08 04:00:38 +02:00
parent 0cbe1e6c14
commit 35a6df5730
1 changed files with 35 additions and 22 deletions
Download Patch File Download Diff File Expand all files Collapse all files

57
src/mesa/drivers/dri/r300/compiler/radeon_program_tex.c
View File

@@ -113,13 +113,13 @@ int radeonTransformTEX(
return 1;
} else {
rc_compare_func comparefunc = compiler->state.unit[inst->U.I.TexSrcUnit].texture_compare_func;
struct rc_instruction * inst_rcp = rc_insert_new_instruction(c, inst);
struct rc_instruction * inst_mad = rc_insert_new_instruction(c, inst_rcp);
struct rc_instruction * inst_cmp = rc_insert_new_instruction(c, inst_mad);
unsigned tmp_recip_w = rc_find_free_temporary(c);
struct rc_instruction * inst_rcp = NULL;
struct rc_instruction * inst_mad;
struct rc_instruction * inst_cmp;
unsigned tmp_texsample = rc_find_free_temporary(c);
unsigned tmp_sum = rc_find_free_temporary(c);
int pass, fail;
unsigned tmp_recip_w;
int pass, fail, tex;
/* Save the output register. */
struct rc_dst_register output_reg = inst->U.I.DstReg;
@@ -129,28 +129,40 @@ int radeonTransformTEX(
inst->U.I.DstReg.Index = tmp_texsample;
inst->U.I.DstReg.WriteMask = RC_MASK_XYZW;
/* Compute 1/W. */
inst_rcp->U.I.Opcode = RC_OPCODE_RCP;
inst_rcp->U.I.DstReg.File = RC_FILE_TEMPORARY;
inst_rcp->U.I.DstReg.Index = tmp_recip_w;
inst_rcp->U.I.DstReg.WriteMask = RC_MASK_W;
inst_rcp->U.I.SrcReg[0] = inst->U.I.SrcReg[0];
inst_rcp->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_WWWW;
if (inst->U.I.Opcode == RC_OPCODE_TXP) {
tmp_recip_w = rc_find_free_temporary(c);
/* Perspective-divide r (=depth) by W and add the texture sample (see below). */
inst_mad->U.I.Opcode = RC_OPCODE_MAD;
/* Compute 1/W. */
inst_rcp = rc_insert_new_instruction(c, inst);
inst_rcp->U.I.Opcode = RC_OPCODE_RCP;
inst_rcp->U.I.DstReg.File = RC_FILE_TEMPORARY;
inst_rcp->U.I.DstReg.Index = tmp_recip_w;
inst_rcp->U.I.DstReg.WriteMask = RC_MASK_W;
inst_rcp->U.I.SrcReg[0] = inst->U.I.SrcReg[0];
inst_rcp->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_WWWW;
}
/* Perspective-divide r by W (if it's TXP) and add the texture sample (see below). */
inst_mad = rc_insert_new_instruction(c, inst_rcp ? inst_rcp : inst);
inst_mad->U.I.DstReg.File = RC_FILE_TEMPORARY;
inst_mad->U.I.DstReg.Index = tmp_sum;
inst_mad->U.I.SrcReg[0] = inst->U.I.SrcReg[0];
inst_mad->U.I.SrcReg[0].Swizzle = RC_SWIZZLE_ZZZZ;
inst_mad->U.I.SrcReg[1].File = RC_FILE_TEMPORARY;
inst_mad->U.I.SrcReg[1].Index = tmp_recip_w;
inst_mad->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW;
inst_mad->U.I.SrcReg[2].File = RC_FILE_TEMPORARY;
inst_mad->U.I.SrcReg[2].Index = tmp_texsample;
inst_mad->U.I.SrcReg[2].Swizzle = compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle;
if (inst->U.I.Opcode == RC_OPCODE_TXP) {
inst_mad->U.I.Opcode = RC_OPCODE_MAD;
inst_mad->U.I.SrcReg[1].File = RC_FILE_TEMPORARY;
inst_mad->U.I.SrcReg[1].Index = tmp_recip_w;
inst_mad->U.I.SrcReg[1].Swizzle = RC_SWIZZLE_WWWW;
tex = 2;
} else {
inst_mad->U.I.Opcode = RC_OPCODE_ADD;
tex = 1;
}
inst_mad->U.I.SrcReg[tex].File = RC_FILE_TEMPORARY;
inst_mad->U.I.SrcReg[tex].Index = tmp_texsample;
inst_mad->U.I.SrcReg[tex].Swizzle = compiler->state.unit[inst->U.I.TexSrcUnit].depth_texture_swizzle;
/* Recall that SrcReg[0] is tex, SrcReg[2] is r and:
/* Recall that SrcReg[0] is r, SrcReg[tex] is tex and:
* LESS: r < tex <=> -tex+r < 0
* GEQUAL: r >= tex <=> not (-tex+r < 0)
* GREATER: r > tex <=> tex-r < 0
@@ -158,7 +170,7 @@ int radeonTransformTEX(
*
* This negates either r or tex: */
if (comparefunc == RC_COMPARE_FUNC_LESS || comparefunc == RC_COMPARE_FUNC_GEQUAL)
inst_mad->U.I.SrcReg[2].Negate = inst_mad->U.I.SrcReg[2].Negate ^ RC_MASK_XYZW;
inst_mad->U.I.SrcReg[tex].Negate = inst_mad->U.I.SrcReg[tex].Negate ^ RC_MASK_XYZW;
else
inst_mad->U.I.SrcReg[0].Negate = inst_mad->U.I.SrcReg[0].Negate ^ RC_MASK_XYZW;
@@ -171,6 +183,7 @@ int radeonTransformTEX(
fail = 1;
}
inst_cmp = rc_insert_new_instruction(c, inst_mad);
inst_cmp->U.I.Opcode = RC_OPCODE_CMP;
inst_cmp->U.I.DstReg = output_reg;
inst_cmp->U.I.SrcReg[0].File = RC_FILE_TEMPORARY;