mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-05-23 13:52:28 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Make further progress on non-x86 support

Browse source
This commit is contained in:
Justine Tunney 2023-05-08 21:38:30 -07:00
parent aef9a69a60
commit 036b9a0002
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
155 changed files with 2307 additions and 653 deletions
Download patch file Download diff file Expand all files Collapse all files

27
libc/tinymath/trunc.c
View file

@ -27,6 +27,7 @@
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/tinymath/internal.h"
#include "third_party/intel/smmintrin.internal.h"
asm(".ident\t\"\\n\\n\
Musl libc (MIT License)\\n\
@ -39,6 +40,30 @@ asm(".include \"libc/disclaimer.inc\"");
*/
double trunc(double x)
{
#ifdef __aarch64__
asm("frintz\t%d0,%d1" : "=w"(x) : "w"(x));
return x;
#elif defined(__powerpc64__) && defined(_ARCH_PWR5X)
asm("friz\t%0,%1" : "=d"(x) : "d"(x));
return x;
#elif defined(__s390x__) && (defined(__HTM__) || __ARCH__ >= 9)
asm("fidbra\t%0,5,%1,4" : "=f"(x) : "f"(x));
return x;
#elif defined(__x86_64__) && defined(__SSE4_1__)
asm("roundsd\t%2,%1,%0"
: "=x"(x)
: "x"(x), "i"(_MM_FROUND_TO_ZERO | _MM_FROUND_NO_EXC));
return x;
#else
union {double f; uint64_t i;} u = {x};
int e = (int)(u.i >> 52 & 0x7ff) - 0x3ff + 12;
uint64_t m;
@ -52,4 +77,6 @@ double trunc(double x)
FORCE_EVAL(x + 0x1p120f);
u.i &= ~m;
return u.f;
#endif /* __aarch64__ */
}