25 lines
942 B
C
25 lines
942 B
C
#ifndef COSMOPOLITAN_LIBC_BITS_MORTON_H_
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#define COSMOPOLITAN_LIBC_BITS_MORTON_H_
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#include "libc/intrin/pdep.h"
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#include "libc/intrin/pext.h"
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#include "libc/nexgen32e/x86feature.h"
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#if !(__ASSEMBLER__ + __LINKER__ + 0)
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COSMOPOLITAN_C_START_
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unsigned long morton(unsigned long, unsigned long) libcesque;
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axdx_t unmorton(unsigned long) libcesque;
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#ifndef __STRICT_ANSI__
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#define morton(Y, X) \
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(X86_NEED(BMI2) ? pdep(X, 0x5555555555555555) | pdep(Y, 0xAAAAAAAAAAAAAAAA) \
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: morton(Y, X))
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#define unmorton(I) \
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(X86_NEED(BMI2) \
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? (axdx_t){pext(I, 0xAAAAAAAAAAAAAAAA), pext(I, 0x5555555555555555)} \
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: unmorton(I))
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#endif
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COSMOPOLITAN_C_END_
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#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
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#endif /* COSMOPOLITAN_LIBC_BITS_MORTON_H_ */
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