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bits/syscall.h: add landlock syscalls from linux v5.13
[musl.git]
/
src
/
math
/
x86_64
/
fabs.c
blob
1656247770f778aba56e0620adbc3e8241a3e8ea
1
#include <math.h>
2
3
double
fabs
(
double
x
)
4
{
5
double
t
;
6
__asm__
(
"pcmpeqd %0, %0"
:
"=x"
(
t
));
// t = ~0
7
__asm__
(
"psrlq $1, %0"
:
"+x"
(
t
));
// t >>= 1
8
__asm__
(
"andps %1, %0"
:
"+x"
(
x
) :
"x"
(
t
));
// x &= t
9
return
x
;
10
}