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Author SHA1 Message Date
Matt Arsenault 3cb9ff8863 AMDGPU: Keep track of modifiers when converting v_mac to v_mad 
Since v_max_f32_e64/v_max_f16_e64 can be folded if the target
instruction supports the clamp bit, we also need to maintain
modifiers when converting v_mac to v_mad.

This fixes a rendering issue with Dirt Rally because a v_mac
instruction with the clamp bit set was converted to a v_mad
but that bit was lost during the conversion.

Fixes: e184e01dd79 ("AMDGPU: Fold FP clamp as modifier bit")

Patch by Samuel Pitoiset <samuel.pitoiset@gmail.com>

llvm-svn: 297556
 2017-03-11 05:40:40 +00:00
Matt Arsenault 79a45db7f5 AMDGPU: Use clamp with f64 
llvm-svn: 295908
 2017-02-22 23:53:37 +00:00
Matt Arsenault d5c6515b68 AMDGPU: Fold FP clamp as modifier bit 
The manual is unclear on the details of this. It's not
clear to me if denormals are not allowed with clamp,
or if that is only omod. Not allowing denorms for
fp16 or fp64 isn't useful so I also question if that
is really a restriction. Same with whether this is valid
without IEEE mode enabled.

llvm-svn: 295905
 2017-02-22 23:27:53 +00:00