diff options
| author | Zack Rusin <[email protected]> | 2013-07-08 23:45:55 -0400 |
|---|---|---|
| committer | Zack Rusin <[email protected]> | 2013-07-09 23:30:55 -0400 |
| commit | 63386b2f66a6d450889cd5368bc599beb7f1efbf (patch) | |
| tree | a82f6a2acbbfc7d639687033060a44a0621e12a3 /src/gallium/auxiliary/util/u_math.h | |
| parent | 80bc14370a4db876ababc13404a93526c2b14de7 (diff) | |
util: treat denorm'ed floats like zero
The D3D10 spec is very explicit about treatment of denorm floats and
the behavior is exactly the same for them as it would be for -0 or
+0. This makes our shading code match that behavior, since OpenGL
doesn't care and on a few cpu's it's faster (worst case the same).
Float16 conversions will likely break but we'll fix them in a follow
up commit.
Signed-off-by: Zack Rusin <[email protected]>
Reviewed-by: Jose Fonseca <[email protected]>
Reviewed-by: Roland Scheidegger <[email protected]>
Diffstat (limited to 'src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | src/gallium/auxiliary/util/u_math.h | 7 |
1 files changed, 7 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/util/u_math.h b/src/gallium/auxiliary/util/u_math.h index 64d16cbe715..bc3948875a9 100644 --- a/src/gallium/auxiliary/util/u_math.h +++ b/src/gallium/auxiliary/util/u_math.h @@ -763,6 +763,13 @@ static INLINE int32_t util_signed_fixed(float value, unsigned frac_bits) return (int32_t)(value * (1<<frac_bits)); } +unsigned +util_fpstate_get(void); +unsigned +util_fpstate_set_denorms_to_zero(unsigned current_fpstate); +void +util_fpstate_set(unsigned fpstate); + #ifdef __cplusplus |