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i965: When emitting a src/dst write of an output, keep the write mask

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Fixes i965 piglit:

    vs-varying-array-mat[234]-col-row-wr
    vs-varying-array-mat[234]-index-col-row-wr
    vs-varying-array-mat[234]-index-row-wr
    vs-varying-array-mat[234]-row-wr
    vs-varying-mat[234]-col-row-wr
    vs-varying-mat[234]-row-wr

Reviewed-by: Eric Anholt <eric@anholt.net>
Reviewed-by: Kenneth Graunke <kenneth@whitecape.org>
This commit is contained in:
Ian Romanick 2011-07-20 16:04:17 -07:00
parent fbeb68e880
commit 337e2dfad0
1 changed files with 5 additions and 1 deletions
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6
src/mesa/drivers/dri/i965/brw_vs_emit.c
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@ -1993,7 +1993,11 @@ void brw_vs_emit(struct brw_vs_compile *c )
index = inst->DstReg.Index;
file = inst->DstReg.File;
if (file == PROGRAM_OUTPUT && c->output_regs[index].used_in_src)
dst = c->output_regs[index].reg;
/* Can't just make get_dst "do the right thing" here because other
* callers of get_dst don't expect any special behavior for the
* c->output_regs[index].used_in_src case.
*/
dst = brw_writemask(c->output_regs[index].reg, inst->DstReg.WriteMask);
else
dst = get_dst(c, inst->DstReg);