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Comments about texture instructions and the src regs

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This commit is contained in:
Brian
2007-10-27 09:32:50 -06:00
parent f6a73c3f28
commit 6ada4e3a69
2 changed files with 22 additions and 11 deletions
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src/mesa/pipe/tgsi/exec/tgsi_exec.c
+12 -8
View File
@@ -1996,15 +1996,15 @@ exec_instruction(
case TGSI_OPCODE_TEX:
/* simple texture lookup */
/* src[0] is the texcoord */
/* src[1] is the sampler unit */
/* src[0] = texcoord */
/* src[1] = sampler unit */
exec_tex(mach, inst, FALSE);
break;
case TGSI_OPCODE_TXB:
/* Texture lookup with lod bias */
/* src[0] is the texcoord (src[0].w = load bias) */
/* src[1] is the sampler unit */
/* src[0] = texcoord (src[0].w = load bias) */
/* src[1] = sampler unit */
exec_tex(mach, inst, TRUE);
break;
@@ -2013,9 +2013,17 @@ exec_instruction(
/* src[0] = texcoord */
/* src[1] = d[strq]/dx */
/* src[2] = d[strq]/dy */
/* src[3] = sampler unit */
assert (0);
break;
case TGSI_OPCODE_TXL:
/* Texture lookup with explit LOD */
/* src[0] = texcoord (src[0].w = load bias) */
/* src[1] = sampler unit */
exec_tex(mach, inst, TRUE);
break;
case TGSI_OPCODE_UP2H:
assert (0);
break;
@@ -2157,10 +2165,6 @@ exec_instruction(
}
break;
case TGSI_OPCODE_TXL:
assert (0);
break;
case TGSI_OPCODE_IF:
/* push CondMask */
assert(mach->CondStackTop < TGSI_EXEC_MAX_COND_NESTING);
src/mesa/state_tracker/st_mesa_to_tgsi.c
+10 -3
View File
@@ -459,6 +459,7 @@ compile_instruction(
fullinst->Instruction.Opcode = TGSI_OPCODE_SWZ;
break;
case OPCODE_TEX:
/* ordinary texture lookup */
fullinst->Instruction.Opcode = TGSI_OPCODE_TEX;
fullinst->Instruction.NumSrcRegs = 2;
fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
@@ -466,6 +467,7 @@ compile_instruction(
fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
break;
case OPCODE_TXB:
/* texture lookup with LOD bias */
fullinst->Instruction.Opcode = TGSI_OPCODE_TXB;
fullinst->Instruction.NumSrcRegs = 2;
fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
@@ -473,13 +475,16 @@ compile_instruction(
fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
break;
case OPCODE_TXD:
/* texture lookup with explicit partial derivatives */
fullinst->Instruction.Opcode = TGSI_OPCODE_TXD;
fullinst->Instruction.NumSrcRegs = 2;
fullinst->Instruction.NumSrcRegs = 4;
fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
fullinst->FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_SAMPLER;
fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
/* src[0] = coord, src[1] = d[strq]/dx, src[2] = d[strq]/dy */
fullinst->FullSrcRegisters[3].SrcRegister.File = TGSI_FILE_SAMPLER;
fullinst->FullSrcRegisters[3].SrcRegister.Index = inst->TexSrcUnit;
break;
case OPCODE_TXL:
/* texture lookup with explicit LOD */
fullinst->Instruction.Opcode = TGSI_OPCODE_TXL;
fullinst->Instruction.NumSrcRegs = 2;
fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );
@@ -487,6 +492,8 @@ compile_instruction(
fullinst->FullSrcRegisters[1].SrcRegister.Index = inst->TexSrcUnit;
break;
case OPCODE_TXP:
/* texture lookup with divide by Q component */
/* convert to TEX w/ special flag for division */
fullinst->Instruction.Opcode = TGSI_OPCODE_TEX;
fullinst->Instruction.NumSrcRegs = 2;
fullinst->InstructionExtTexture.Texture = map_texture_target( inst->TexSrcTarget );