diff options
Diffstat (limited to 'mesalib/src/gallium/auxiliary/util/u_math.h')
| -rw-r--r-- | mesalib/src/gallium/auxiliary/util/u_math.h | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/mesalib/src/gallium/auxiliary/util/u_math.h b/mesalib/src/gallium/auxiliary/util/u_math.h index f5c14ef8d..426d5daa7 100644 --- a/mesalib/src/gallium/auxiliary/util/u_math.h +++ b/mesalib/src/gallium/auxiliary/util/u_math.h @@ -246,6 +246,19 @@ union di { /** + * Extract the IEEE float32 exponent. + */ +static INLINE signed +util_get_float32_exponent(float x) { + union fi f; + + f.f = x; + + return ((f.ui >> 23) & 0xff) - 127; +} + + +/** * Fast version of 2^x * Identity: exp2(a + b) = exp2(a) * exp2(b) * Let ipart = int(x) |