Ian Romanick
47c2aa5b48
Previously, an instruction like
mul(8) vgrf29.xy:F, vgrf25.yxxx:F, [-1F, 1F, 0F, 0F]
would get rewritten as
mul(8) vgrf0.yz:F, vgrf25.yyxx:F, [-1F, 1F, 0F, 0F]
The latter does not produce the correct result. The VF immediate in the
second should be either [-1F, -1F, 1F, 1F] or [0F, -1F, 1F, 0F]. This
commit produces the former.
Fixes: 1ee1d8ab46 ("i965/vec4: Reswizzle sources when necessary.")
Reviewed-by: Matt Turner <mattst88@gmail.com>
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