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util: Cope with LONG_BIT not being defined on Windows.

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Neither MSVC nor MinGW defines LONG_BIT.  For MSVC this was not a problem as
it doesn't define __x86_64__ macro (it's GCC specific.)

However on Windows long type is guaranteed to be 32bits.

Also add an #error, as GCC will just warn, not throw any error, when no
value is returned.

Trivial.
This commit is contained in:
Jose Fonseca
2015-08-09 11:25:41 +01:00
parent eb643db30e
commit 21ccdbdb5d
1 changed files with 6 additions and 2 deletions
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8
src/util/rounding.h
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@@ -96,8 +96,10 @@ _mesa_lroundevenf(float x)
#ifdef __x86_64__
#if LONG_BIT == 64
return _mm_cvtss_si64(_mm_load_ss(&x));
#elif LONG_BIT == 32
#elif LONG_BIT == 32 || defined(_WIN32)
return _mm_cvtss_si32(_mm_load_ss(&x));
#else
#error "Unsupported or undefined LONG_BIT"
#endif
#else
return lrintf(x);
@@ -114,8 +116,10 @@ _mesa_lroundeven(double x)
#ifdef __x86_64__
#if LONG_BIT == 64
return _mm_cvtsd_si64(_mm_load_sd(&x));
#elif LONG_BIT == 32
#elif LONG_BIT == 32 || defined(_WIN32)
return _mm_cvtsd_si32(_mm_load_sd(&x));
#else
#error "Unsupported or undefined LONG_BIT"
#endif
#else
return lrint(x);