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Diffstat (limited to 'intern/cycles/util/util_murmurhash.cpp')
-rw-r--r--intern/cycles/util/util_murmurhash.cpp134
1 files changed, 67 insertions, 67 deletions
diff --git a/intern/cycles/util/util_murmurhash.cpp b/intern/cycles/util/util_murmurhash.cpp
index 68df8fa1a84..5d728769fe9 100644
--- a/intern/cycles/util/util_murmurhash.cpp
+++ b/intern/cycles/util/util_murmurhash.cpp
@@ -27,15 +27,15 @@
#include "util/util_murmurhash.h"
#if defined(_MSC_VER)
-# define ROTL32(x,y) _rotl(x,y)
-# define ROTL64(x,y) _rotl64(x,y)
+# define ROTL32(x, y) _rotl(x, y)
+# define ROTL64(x, y) _rotl64(x, y)
# define BIG_CONSTANT(x) (x)
#else
ccl_device_inline uint32_t rotl32(uint32_t x, int8_t r)
{
- return (x << r) | (x >> (32 - r));
+ return (x << r) | (x >> (32 - r));
}
-# define ROTL32(x,y) rotl32(x,y)
+# define ROTL32(x, y) rotl32(x, y)
# define BIG_CONSTANT(x) (x##LLU)
#endif
@@ -45,82 +45,82 @@ CCL_NAMESPACE_BEGIN
* handle aligned reads, do the conversion here. */
ccl_device_inline uint32_t mm_hash_getblock32(const uint32_t *p, int i)
{
- return p[i];
+ return p[i];
}
/* Finalization mix - force all bits of a hash block to avalanche */
-ccl_device_inline uint32_t mm_hash_fmix32 ( uint32_t h )
+ccl_device_inline uint32_t mm_hash_fmix32(uint32_t h)
{
- h ^= h >> 16;
- h *= 0x85ebca6b;
- h ^= h >> 13;
- h *= 0xc2b2ae35;
- h ^= h >> 16;
- return h;
+ h ^= h >> 16;
+ h *= 0x85ebca6b;
+ h ^= h >> 13;
+ h *= 0xc2b2ae35;
+ h ^= h >> 16;
+ return h;
}
uint32_t util_murmur_hash3(const void *key, int len, uint32_t seed)
{
- const uint8_t * data = (const uint8_t*)key;
- const int nblocks = len / 4;
-
- uint32_t h1 = seed;
-
- const uint32_t c1 = 0xcc9e2d51;
- const uint32_t c2 = 0x1b873593;
-
- const uint32_t * blocks = (const uint32_t *)(data + nblocks*4);
-
- for(int i = -nblocks; i; i++) {
- uint32_t k1 = mm_hash_getblock32(blocks,i);
-
- k1 *= c1;
- k1 = ROTL32(k1,15);
- k1 *= c2;
-
- h1 ^= k1;
- h1 = ROTL32(h1,13);
- h1 = h1 * 5 + 0xe6546b64;
- }
-
- const uint8_t *tail = (const uint8_t*)(data + nblocks*4);
-
- uint32_t k1 = 0;
-
- switch(len & 3) {
- case 3:
- k1 ^= tail[2] << 16;
- ATTR_FALLTHROUGH;
- case 2:
- k1 ^= tail[1] << 8;
- ATTR_FALLTHROUGH;
- case 1:
- k1 ^= tail[0];
- k1 *= c1;
- k1 = ROTL32(k1,15);
- k1 *= c2;
- h1 ^= k1;
- }
-
- h1 ^= len;
- h1 = mm_hash_fmix32(h1);
- return h1;
+ const uint8_t *data = (const uint8_t *)key;
+ const int nblocks = len / 4;
+
+ uint32_t h1 = seed;
+
+ const uint32_t c1 = 0xcc9e2d51;
+ const uint32_t c2 = 0x1b873593;
+
+ const uint32_t *blocks = (const uint32_t *)(data + nblocks * 4);
+
+ for (int i = -nblocks; i; i++) {
+ uint32_t k1 = mm_hash_getblock32(blocks, i);
+
+ k1 *= c1;
+ k1 = ROTL32(k1, 15);
+ k1 *= c2;
+
+ h1 ^= k1;
+ h1 = ROTL32(h1, 13);
+ h1 = h1 * 5 + 0xe6546b64;
+ }
+
+ const uint8_t *tail = (const uint8_t *)(data + nblocks * 4);
+
+ uint32_t k1 = 0;
+
+ switch (len & 3) {
+ case 3:
+ k1 ^= tail[2] << 16;
+ ATTR_FALLTHROUGH;
+ case 2:
+ k1 ^= tail[1] << 8;
+ ATTR_FALLTHROUGH;
+ case 1:
+ k1 ^= tail[0];
+ k1 *= c1;
+ k1 = ROTL32(k1, 15);
+ k1 *= c2;
+ h1 ^= k1;
+ }
+
+ h1 ^= len;
+ h1 = mm_hash_fmix32(h1);
+ return h1;
}
/* This is taken from the cryptomatte specification 1.0 */
float util_hash_to_float(uint32_t hash)
{
- uint32_t mantissa = hash & (( 1 << 23) - 1);
- uint32_t exponent = (hash >> 23) & ((1 << 8) - 1);
- exponent = max(exponent, (uint32_t) 1);
- exponent = min(exponent, (uint32_t) 254);
- exponent = exponent << 23;
- uint32_t sign = (hash >> 31);
- sign = sign << 31;
- uint32_t float_bits = sign | exponent | mantissa;
- float f;
- memcpy(&f, &float_bits, sizeof(uint32_t));
- return f;
+ uint32_t mantissa = hash & ((1 << 23) - 1);
+ uint32_t exponent = (hash >> 23) & ((1 << 8) - 1);
+ exponent = max(exponent, (uint32_t)1);
+ exponent = min(exponent, (uint32_t)254);
+ exponent = exponent << 23;
+ uint32_t sign = (hash >> 31);
+ sign = sign << 31;
+ uint32_t float_bits = sign | exponent | mantissa;
+ float f;
+ memcpy(&f, &float_bits, sizeof(uint32_t));
+ return f;
}
CCL_NAMESPACE_END