Bitmessage/PyBitmessage-2024-12-19
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Refactoring SWAP64 in bitmsghash.cl

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Teruteru 2022-11-08 17:13:49 +09:00
parent e6ecaa5e7d
commit c4257e3223
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1 changed files with 6 additions and 9 deletions
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15
src/bitmsghash/bitmsghash.cl
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@ -26,15 +26,12 @@
/// Warning: This version of SWAP64(n) is slow and avoid bugs on AMD GPUs(7970)
// #define SWAP64(n) as_ulong(as_uchar8(n).s76543210)
#define SWAP64(n) \
(((n) << 56) \
| (((n) & 0xff00) << 40) \
| (((n) & 0xff0000) << 24) \
| (((n) & 0xff000000) << 8) \
| (((n) >> 8) & 0xff000000) \
| (((n) >> 24) & 0xff0000) \
| (((n) >> 40) & 0xff00) \
| ((n) >> 56))
static inline uint64_t SWAP64(uint64_t n)
{
n = n << 32 | n >> 32;
n = (n & 0x0000ffff0000ffffUL) << 16 | (n & 0xffff0000ffff0000UL) >> 16;
return (n & 0x00ff00ff00ff00ffUL) << 8 | (n & 0xff00ff00ff00ff00UL) >> 8;
}