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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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34
libc/intrin/pdep.c Normal file
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@ -0,0 +1,34 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/pdep.h"
/**
* Parallel bit deposit.
*/
uint64_t(pdep)(uint64_t x, uint64_t mask) {
uint64_t r, b;
for (r = 0, b = 1; mask; mask >>= 1, b <<= 1) {
if (mask & 1) {
if (x & 1) r |= b;
x >>= 1;
}
}
return r;
}

9
libc/intrin/pdep.h
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@ -1,16 +1,21 @@
#ifndef COSMOPOLITAN_LIBC_INTRIN_PDEP_H_
#define COSMOPOLITAN_LIBC_INTRIN_PDEP_H_
#include "libc/nexgen32e/x86feature.h"
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
/* TODO(jart): Implement polyfill. */
#define pdep(NUMBER, BITMASK) \
uint64_t pdep(uint64_t, uint64_t) pureconst;
#define PDEP(NUMBER, BITMASK) \
({ \
typeof(BITMASK) ShuffledBits, Number = (NUMBER); \
asm("pdep\t%2,%1,%0" : "=r"(ShuffledBits) : "r"(Number), "rm"(BITMASK)); \
ShuffledBits; \
})
#define pdep(NUMBER, BITMASK) \
(!X86_HAVE(BMI2) ? pdep(NUMBER, BITMASK) : PDEP(NUMBER, BITMASK))
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_PDEP_H_ */

34
libc/intrin/pext.c Normal file
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/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ This program is free software; you can redistribute it and/or modify │
│ it under the terms of the GNU General Public License as published by │
│ the Free Software Foundation; version 2 of the License. │
│ │
│ This program is distributed in the hope that it will be useful, but │
│ WITHOUT ANY WARRANTY; without even the implied warranty of │
│ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU │
│ General Public License for more details. │
│ │
│ You should have received a copy of the GNU General Public License │
│ along with this program; if not, write to the Free Software │
│ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/pext.h"
/**
* Parallel bit extract.
*/
uint64_t(pext)(uint64_t x, uint64_t mask) {
uint64_t r, b;
for (r = 0, b = 1; mask; mask >>= 1, x >>= 1) {
if (mask & 1) {
if (x & 1) r |= b;
b <<= 1;
}
}
return r;
}

8
libc/intrin/pext.h
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@ -3,14 +3,18 @@
#if !(__ASSEMBLER__ + __LINKER__ + 0)
COSMOPOLITAN_C_START_
/* TODO(jart): Implement polyfill. */
#define pext(NUMBER, BITMASK) \
uint64_t pext(uint64_t, uint64_t) pureconst;
#define PEXT(NUMBER, BITMASK) \
({ \
typeof(BITMASK) ShuffledBits, Number = (NUMBER); \
asm("pext\t%2,%1,%0" : "=r"(ShuffledBits) : "r"(Number), "rm"(BITMASK)); \
ShuffledBits; \
})
#define pext(NUMBER, BITMASK) \
(!X86_HAVE(BMI2) ? pext(NUMBER, BITMASK) : PEXT(NUMBER, BITMASK))
COSMOPOLITAN_C_END_
#endif /* !(__ASSEMBLER__ + __LINKER__ + 0) */
#endif /* COSMOPOLITAN_LIBC_INTRIN_PEXT_H_ */