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tgsi/lowering: stop using TGSI_OPCODE_CLAMP

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v2: do it correctly

Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
This commit is contained in:
Marek Olšák 2017-02-16 17:11:30 +01:00
parent 1d1b769561
commit 73d1c8c686
1 changed files with 13 additions and 4 deletions
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17
src/gallium/auxiliary/tgsi/tgsi_lowering.c
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@ -572,16 +572,25 @@ transform_lit(struct tgsi_transform_context *tctx,
reg_src(&new_inst.Src[1], &ctx->imm, SWIZ(X, X, _, _));
tctx->emit_instruction(tctx, &new_inst);
/* CLAMP tmpA.z, src.w, -imm{128.0}, imm{128.0} */
/* MIN tmpA.z, src.w, imm{128.0} */
new_inst = tgsi_default_full_instruction();
new_inst.Instruction.Opcode = TGSI_OPCODE_CLAMP;
new_inst.Instruction.Opcode = TGSI_OPCODE_MIN;
new_inst.Instruction.NumDstRegs = 1;
reg_dst(&new_inst.Dst[0], &ctx->tmp[A].dst, TGSI_WRITEMASK_Z);
new_inst.Instruction.NumSrcRegs = 3;
new_inst.Instruction.NumSrcRegs = 2;
reg_src(&new_inst.Src[0], src, SWIZ(_, _, W, _));
reg_src(&new_inst.Src[1], &ctx->imm, SWIZ(_, _, Z, _));
tctx->emit_instruction(tctx, &new_inst);
/* MAX tmpA.z, tmpA.z, -imm{128.0} */
new_inst = tgsi_default_full_instruction();
new_inst.Instruction.Opcode = TGSI_OPCODE_MAX;
new_inst.Instruction.NumDstRegs = 1;
reg_dst(&new_inst.Dst[0], &ctx->tmp[A].dst, TGSI_WRITEMASK_Z);
new_inst.Instruction.NumSrcRegs = 2;
reg_src(&new_inst.Src[0], &ctx->tmp[A].src, SWIZ(_, _, Z, _));
reg_src(&new_inst.Src[1], &ctx->imm, SWIZ(_, _, Z, _));
new_inst.Src[1].Register.Negate = true;
reg_src(&new_inst.Src[2], &ctx->imm, SWIZ(_, _, Z, _));
tctx->emit_instruction(tctx, &new_inst);
/* LG2 tmpA.y, tmpA.y */