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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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30
libc/tinymath/floorf.c
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@ -26,6 +26,7 @@
│ │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/tinymath/internal.h"
#include "third_party/intel/smmintrin.internal.h"
#include "third_party/libcxx/math.h"
asm(".ident\t\"\\n\\n\
@ -34,8 +35,35 @@ Copyright 2005-2014 Rich Felker, et. al.\"");
asm(".include \"libc/disclaimer.inc\"");
// clang-format off
/**
* Returns largest integral value not greater than 𝑥.
*/
float floorf(float x)
{
#ifdef __aarch64__
asm("frintm\t%s0,%s1" : "=w"(x) : "w"(x));
return x;
#elif defined(__powerpc64__) && defined(_ARCH_PWR5X)
asm("frim\t%0,%1" : "=f"(x) : "f"(x));
return x;
#elif defined(__s390x__) && (defined(__HTM__) || __ARCH__ >= 9)
asm("fiebra\t%0,7,%1,4" : "=f"(x) : "f"(x));
return x;
#elif defined(__x86_64__) && defined(__SSE4_1__)
asm("roundss\t%2,%1,%0"
: "=x"(x)
: "x"(x), "i"(_MM_FROUND_TO_NEG_INF | _MM_FROUND_NO_EXC));
return x;
#else
union {float f; uint32_t i;} u = {x};
int e = (int)(u.i >> 23 & 0xff) - 0x7f;
uint32_t m;
@ -58,4 +86,6 @@ float floorf(float x)
u.f = -1.0;
}
return u.f;
#endif /* __aarch64__ */
}