mirror of
https://github.com/jart/cosmopolitan.git
synced 2025-07-27 13:00:28 +00:00
Make improvements
This commit is contained in:
parent
3e4fd4b0ad
commit
e44a0cf6f8
256 changed files with 23100 additions and 2294 deletions
34
libc/intrin/pdep.c
Normal file
34
libc/intrin/pdep.c
Normal file
|
@ -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;
|
||||
}
|
|
@ -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
34
libc/intrin/pext.c
Normal file
|
@ -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/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;
|
||||
}
|
|
@ -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_ */
|
||||
|
|
Loading…
Add table
Add a link
Reference in a new issue