diff options
| author | Timothy Arceri <tarceri@itsqueeze.com> | 2017-03-22 10:47:05 +1100 |
|---|---|---|
| committer | Timothy Arceri <tarceri@itsqueeze.com> | 2017-03-23 08:16:29 +1100 |
| commit | 53660c23662edb829e6bfd54bcdc0df4688ec62b (patch) | |
| tree | 88f3f160cc56b99c2cd5cb034fe0bb64b9a97472 /src/gallium | |
| parent | e11049f2c367192dfb1540855f6571a5e29b77ec (diff) | |
util: move rand_xorshift128plus() to utils
V2: pass the seed to rand_xorshift128plus() so that we can isolate
its uses.
Reviewed-by: Grazvydas Ignotas <notasas@gmail.com>
Reviewed-by: Nicolai Hähnle <nicolai.haehnle@amd.com>
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/drivers/radeon/r600_test_dma.c | 24 |
1 files changed, 5 insertions, 19 deletions
diff --git a/src/gallium/drivers/radeon/r600_test_dma.c b/src/gallium/drivers/radeon/r600_test_dma.c index f7e9eb5fc3..8b4149af53 100644 --- a/src/gallium/drivers/radeon/r600_test_dma.c +++ b/src/gallium/drivers/radeon/r600_test_dma.c @@ -26,26 +26,10 @@ #include "r600_pipe_common.h" #include "util/u_surface.h" +#include "util/rand_xor.h" static uint64_t seed_xorshift128plus[2]; -/* Super fast random number generator. - * - * This rand_xorshift128plus function by Sebastiano Vigna belongs - * to the public domain. - */ -static uint64_t rand_xorshift128plus(void) -{ - uint64_t *s = seed_xorshift128plus; - - uint64_t s1 = s[0]; - const uint64_t s0 = s[1]; - s[0] = s0; - s1 ^= s1 << 23; - s[1] = s1 ^ s0 ^ (s1 >> 18) ^ (s0 >> 5); - return s[1] + s0; -} - #define RAND_NUM_SIZE 8 /* The GPU blits are emulated on the CPU using these CPU textures. */ @@ -91,8 +75,10 @@ static void set_random_pixels(struct pipe_context *ctx, assert(t->stride % RAND_NUM_SIZE == 0); assert(cpu->stride % RAND_NUM_SIZE == 0); - for (x = 0; x < size; x++) - *ptr++ = *ptr_cpu++ = rand_xorshift128plus(); + for (x = 0; x < size; x++) { + *ptr++ = *ptr_cpu++ = + rand_xorshift128plus(seed_xorshift128plus); + } } } |