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r600/sfn: Only fetch the constants that are needed in fdd*

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The number of source components can be deternmined based on the number
of dest components, and copying other components to the gradient get
call is not required.

Closes #4557

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/10011>
This commit is contained in:
Gert Wollny
2021-04-02 14:27:38 +02:00
committed by Marge Bot
parent dee89af505
commit 004ca76238
1 changed files with 3 additions and 5 deletions
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src/gallium/drivers/r600/sfn/sfn_emitaluinstruction.cpp
+3 -5
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@@ -913,12 +913,10 @@ bool EmitAluInstruction::emit_tex_fdd(const nir_alu_instr& instr, TexInstruction
GPRVector::Values v;
std::array<int, 4> writemask = {0,1,2,3};
int ncomp = nir_src_num_components(instr.src[0].src);
GPRVector::Swizzle src_swz;
for (auto i = 0; i < 4; ++i) {
int ncomp = nir_dest_num_components(instr.dest.dest);
GPRVector::Swizzle src_swz = {7,7,7,7};
for (auto i = 0; i < ncomp; ++i)
src_swz[i] = instr.src[0].swizzle[i];
}
auto src = vec_from_nir_with_fetch_constant(instr.src[0].src, (1 << ncomp) - 1, src_swz);