diff options
Diffstat (limited to 'intern/cycles/util/util_hash.h')
-rw-r--r-- | intern/cycles/util/util_hash.h | 55 |
1 files changed, 31 insertions, 24 deletions
diff --git a/intern/cycles/util/util_hash.h b/intern/cycles/util/util_hash.h index f343252eaca..785482967db 100644 --- a/intern/cycles/util/util_hash.h +++ b/intern/cycles/util/util_hash.h @@ -23,49 +23,56 @@ CCL_NAMESPACE_BEGIN ccl_device_inline uint hash_int_2d(uint kx, uint ky) { -#define rot(x,k) (((x)<<(k)) | ((x)>>(32-(k)))) - - uint a, b, c; - - a = b = c = 0xdeadbeef + (2 << 2) + 13; - a += kx; - b += ky; - - c ^= b; c -= rot(b,14); - a ^= c; a -= rot(c,11); - b ^= a; b -= rot(a,25); - c ^= b; c -= rot(b,16); - a ^= c; a -= rot(c,4); - b ^= a; b -= rot(a,14); - c ^= b; c -= rot(b,24); - - return c; +#define rot(x, k) (((x) << (k)) | ((x) >> (32 - (k)))) + + uint a, b, c; + + a = b = c = 0xdeadbeef + (2 << 2) + 13; + a += kx; + b += ky; + + c ^= b; + c -= rot(b, 14); + a ^= c; + a -= rot(c, 11); + b ^= a; + b -= rot(a, 25); + c ^= b; + c -= rot(b, 16); + a ^= c; + a -= rot(c, 4); + b ^= a; + b -= rot(a, 14); + c ^= b; + c -= rot(b, 24); + + return c; #undef rot } ccl_device_inline uint hash_int(uint k) { - return hash_int_2d(k, 0); + return hash_int_2d(k, 0); } #ifndef __KERNEL_GPU__ static inline uint hash_string(const char *str) { - uint i = 0, c; + uint i = 0, c; - while((c = *str++)) - i = i * 37 + c; + while ((c = *str++)) + i = i * 37 + c; - return i; + return i; } #endif ccl_device_inline float hash_int_01(uint k) { - return (float)hash_int(k) * (1.0f/(float)0xFFFFFFFF); + return (float)hash_int(k) * (1.0f / (float)0xFFFFFFFF); } CCL_NAMESPACE_END -#endif /* __UTIL_HASH_H__ */ +#endif /* __UTIL_HASH_H__ */ |