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Make further progress on non-x86 support

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Justine Tunney 2023-05-08 21:38:30 -07:00
parent aef9a69a60
commit 036b9a0002
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GPG key ID: BE714B4575D6E328
155 changed files with 2307 additions and 653 deletions
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23
libc/tinymath/round.c
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@ -26,6 +26,7 @@
│ │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/math.h"
#include "libc/runtime/fenv.h"
#include "libc/tinymath/internal.h"
asm(".ident\t\"\\n\\n\
@ -41,8 +42,28 @@ asm(".include \"libc/disclaimer.inc\"");
#endif
static const double_t toint = 1/EPS;
/**
* Rounds 𝑥 to nearest integer, away from zero.
*/
double round(double x)
{
#ifdef __aarch64__
asm("frinta\t%d0,%d1" : "=w"(x) : "w"(x));
return x;
#elif defined(__powerpc64__) && defined(_ARCH_PWR5X)
asm("frin\t%0,%1" : "=d"(x) : "d"(x));
return x;
#elif defined(__s390x__) && (defined(__HTM__) || __ARCH__ >= 9)
asm("fidbra\t%0,1,%1,4" : "=f"(x) : "f"(x));
return x;
#else
union {double f; uint64_t i;} u = {x};
int e = u.i >> 52 & 0x7ff;
double_t y;
@ -66,4 +87,6 @@ double round(double x)
if (u.i >> 63)
y = -y;
return y;
#endif /* __aarch64__ */
}