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[965] Don't let the negate flags of src0 affect 1 constants in precalc_dst/lit 

This patch is a variant of a submission by Michal Wajdeczko to fix
oglconform fpalu failures.
This commit is contained in:
Eric Anholt 2008-03-26 13:23:43 -07:00
parent 13a6f73a64
commit b4cbf6983e
1 changed files with 21 additions and 14 deletions
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35
src/mesa/drivers/dri/i965/brw_wm_fp.c
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@ -494,17 +494,20 @@ static void precalc_dst( struct brw_wm_compile *c,
if (dst.WriteMask & WRITEMASK_XZ) {
struct prog_instruction *swz;
GLuint z = GET_SWZ(src0.Swizzle, Z);
/* dst.xz = swz src0.1zzz
*/
emit_op(c,
OPCODE_SWZ,
dst_mask(dst, WRITEMASK_XZ),
inst->SaturateMode, 0, 0,
src_swizzle(src0, SWIZZLE_ONE, z, z, z),
src_undef(),
src_undef());
swz = emit_op(c,
OPCODE_SWZ,
dst_mask(dst, WRITEMASK_XZ),
inst->SaturateMode, 0, 0,
src_swizzle(src0, SWIZZLE_ONE, z, z, z),
src_undef(),
src_undef());
/* Avoid letting negation flag of src0 affect our 1 constant. */
swz->SrcReg[0].NegateBase &= ~NEGATE_X;
}
if (dst.WriteMask & WRITEMASK_W) {
/* dst.w = mov src1.w
@ -527,15 +530,19 @@ static void precalc_lit( struct brw_wm_compile *c,
struct prog_dst_register dst = inst->DstReg;
if (dst.WriteMask & WRITEMASK_XW) {
struct prog_instruction *swz;
/* dst.xw = swz src0.1111
*/
emit_op(c,
OPCODE_SWZ,
dst_mask(dst, WRITEMASK_XW),
0, 0, 0,
src_swizzle1(src0, SWIZZLE_ONE),
src_undef(),
src_undef());
swz = emit_op(c,
OPCODE_SWZ,
dst_mask(dst, WRITEMASK_XW),
0, 0, 0,
src_swizzle1(src0, SWIZZLE_ONE),
src_undef(),
src_undef());
/* Avoid letting the negation flag of src0 affect our 1 constant. */
swz->SrcReg[0].NegateBase = 0;
}