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st/nine: Fix SINCOS input

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SINCOS takes an input with replicated swizzle.
the swizzle can be on any component, not just x.
Enable it to read from any component, but also
use a temporary register to avoid dst/src aliasing.

No known game is fixed by this change as it seems
the input swizzle is commonly on x for this instruction,
and src and dst don't alias.

Signed-off-by: Axel Davy <davyaxel0@gmail.com>
This commit is contained in:
Axel Davy
2019-04-13 12:25:57 +02:00
parent f4ae483c44
commit 4ca6b1dfd1
1 changed files with 7 additions and 2 deletions
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src/gallium/state_trackers/nine/nine_shader.c
+7 -2
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@@ -1807,14 +1807,19 @@ DECL_SPECIAL(SINCOS)
struct ureg_program *ureg = tx->ureg;
struct ureg_dst dst = tx_dst_param(tx, &tx->insn.dst[0]);
struct ureg_src src = tx_src_param(tx, &tx->insn.src[0]);
struct ureg_dst tmp = tx_scratch_scalar(tx);
assert(!(dst.WriteMask & 0xc));
/* Copying to a temporary register avoids src/dst aliasing.
* src is supposed to have replicated swizzle. */
ureg_MOV(ureg, tmp, src);
/* z undefined, w untouched */
ureg_COS(ureg, ureg_writemask(dst, TGSI_WRITEMASK_X),
ureg_scalar(src, TGSI_SWIZZLE_X));
tx_src_scalar(tmp));
ureg_SIN(ureg, ureg_writemask(dst, TGSI_WRITEMASK_Y),
ureg_scalar(src, TGSI_SWIZZLE_X));
tx_src_scalar(tmp));
return D3D_OK;
}