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i965/fs: Correct mistake in determining whether a MUL is negated.

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a * b is equivalent to -a * -b, and the previous code was failing at
that.

Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=89961
Reviewed-by: Anuj Phogat <anuj.phogat@gmail.com>
Reviewed-by: Ian Romanick <ian.d.romanick@intel.com>
This commit is contained in:
Matt Turner 2015-04-13 11:29:14 -07:00
parent 07c571a39f
commit 3ca17e75e4
1 changed files with 1 additions and 1 deletions
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src/mesa/drivers/dri/i965/brw_fs_cse.cpp
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@ -145,7 +145,7 @@ operands_match(const fs_inst *a, const fs_inst *b, bool *negate)
xs[1].fixed_hw_reg.dw1.f = xs1_imm;
ys[1].fixed_hw_reg.dw1.f = ys1_imm;
*negate = (xs0_negate + xs1_negate) != (ys0_negate + ys1_negate);
*negate = (xs0_negate != xs1_negate) != (ys0_negate != ys1_negate);
return ret;
} else if (!a->is_commutative()) {
bool match = true;