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This commit is contained in:
Justine Tunney
2020-12-01 03:43:40 -08:00
parent 3e4fd4b0ad
commit e44a0cf6f8
256 changed files with 23100 additions and 2294 deletions
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19
libc/bits/morton.h
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@@ -6,18 +6,17 @@
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
unsigned long morton(unsigned long, unsigned long) libcesque pureconst;
axdx_t unmorton(unsigned long) libcesque pureconst;
unsigned long morton(unsigned long, unsigned long) libcesque;
axdx_t unmorton(unsigned long) libcesque;
#ifndef __STRICT_ANSI__
#define morton(Y, X) \
(X86_NEED(BMI2) \
? pdep(X, 0x5555555555555555ul) | pdep(Y, 0xAAAAAAAAAAAAAAAAul) \
: morton(Y, X))
#define unmorton(I) \
(X86_NEED(BMI2) ? (axdx_t){pext(I, 0xAAAAAAAAAAAAAAAAul), \
pext(I, 0x5555555555555555ul)} \
: unmorton(I))
#define morton(Y, X) \
(X86_NEED(BMI2) ? pdep(X, 0x5555555555555555) | pdep(Y, 0xAAAAAAAAAAAAAAAA) \
: morton(Y, X))
#define unmorton(I) \
(X86_NEED(BMI2) \
? (axdx_t){pext(I, 0xAAAAAAAAAAAAAAAA), pext(I, 0x5555555555555555)} \
: unmorton(I))
#endif
COSMOPOLITAN_C_END_