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authorBrian Paul <[email protected]>2012-05-18 14:39:41 -0600
committerBrian Paul <[email protected]>2012-05-19 08:28:57 -0600
commit699c1894eea6a42a747ebbc3974bf0abf3d1dd88 (patch)
treeac60a35e6c92598564df7134804ada1bf5d1a1fc /src/mesa/main/pixel.h
parent31d59c78f01925c199fd3a49a27718b0659bbaf4 (diff)
mesa: reimplement IROUND(), add F_TO_I()
The different implementations of IROUND() behaved differently and in the case of fistp, depended on the current x86 FPU rounding mode. This caused some tests like piglit roundmode-pixelstore and roundmode-getintegerv to fail on 32-bit x86 but pass on 64-bit x86. Now IROUND() always rounds to the nearest integer (away from zero). The new F_TO_I function converts a float to an int by whatever means is fastest. We'll use this where we're more concerned with performance and not too worried to how the conversion is done. Reviewed-by: José Fonseca <[email protected]>
Diffstat (limited to 'src/mesa/main/pixel.h')
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