OpenHarmony/third_party_mesa3d
2
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

util: fix strict aliasing issues in u_format_r11g11b10f.h

Browse Source
This commit is contained in:
Roland Scheidegger
2011-06-09 01:11:52 +02:00
parent c1090f3019
commit d302804deb
1 changed files with 16 additions and 8 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
src/gallium/auxiliary/util/u_format_r11g11b10f.h
View File

@@ -45,14 +45,18 @@
static INLINE unsigned f32_to_uf11(float val)
{
uint32_t f32 = (*(uint32_t *) &val);
union {
float f;
uint32_t ui;
} f32 = {val};
uint16_t uf11 = 0;
/* Decode little-endian 32-bit floating-point value */
int sign = (f32 >> 16) & 0x8000;
int sign = (f32.ui >> 16) & 0x8000;
/* Map exponent to the range [-127,128] */
int exponent = ((f32 >> 23) & 0xff) - 127;
int mantissa = f32 & 0x007fffff;
int exponent = ((f32.ui >> 23) & 0xff) - 127;
int mantissa = f32.ui & 0x007fffff;
if (sign) return 0;
@@ -111,14 +115,18 @@ static INLINE float uf11_to_f32(uint16_t val)
static INLINE unsigned f32_to_uf10(float val)
{
uint32_t f32 = (*(uint32_t *) &val);
union {
float f;
uint32_t ui;
} f32 = {val};
uint16_t uf10 = 0;
/* Decode little-endian 32-bit floating-point value */
int sign = (f32 >> 16) & 0x8000;
int sign = (f32.ui >> 16) & 0x8000;
/* Map exponent to the range [-127,128] */
int exponent = ((f32 >> 23) & 0xff) - 127;
int mantissa = f32 & 0x007fffff;
int exponent = ((f32.ui >> 23) & 0xff) - 127;
int mantissa = f32.ui & 0x007fffff;
if (sign) return 0;