29 lines
669 B
C
29 lines
669 B
C
#ifndef COSMOPOLITAN_LIBC_RAND_XORSHIFT_H_
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#define COSMOPOLITAN_LIBC_RAND_XORSHIFT_H_
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#define kMarsagliaXorshift64Seed 88172645463325252
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#define kMarsagliaXorshift32Seed 2463534242
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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forceinline uint64_t MarsagliaXorshift64(uint64_t state[hasatleast 1]) {
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uint64_t x = state[0];
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x ^= x << 13;
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x ^= x >> 7;
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x ^= x << 17;
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state[0] = x;
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return x;
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}
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forceinline uint32_t MarsagliaXorshift32(uint32_t state[hasatleast 1]) {
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uint32_t x = state[0];
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x ^= x << 13;
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x ^= x >> 17;
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x ^= x << 5;
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state[0] = x;
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return x;
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}
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_RAND_XORSHIFT_H_ */
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