newlib/winsup/cygwin/math/rintf.c

30 lines
925 B
C

/**
* This file has no copyright assigned and is placed in the Public Domain.
* This file is part of the mingw-w64 runtime package.
* No warranty is given; refer to the file DISCLAIMER.PD within this package.
*/
#include <math.h>
#if defined(__arm__) || defined(_ARM_)
/* This works around a compiler bug */
float __rintf_internal( float x );
asm(".def __rintf_internal; .scl 2; .type 32; .endef\n"
"\t.text\n"
"\t.align 4\n"
"\t.globl __rintf_internal\n"
"__rintf_internal:\n"
"\tvcvtr.s32.f32 s0, s0\n"
"\tvcvt.f32.s32 s0, s0\n"
"\tbx lr");
#endif /* defined(__arm__) || defined(_ARM_) */
float rintf (float x) {
float retval = 0.0F;
#if defined(_AMD64_) || defined(__x86_64__) || defined(_X86_) || defined(__i386__)
__asm__ __volatile__ ("frndint;": "=t" (retval) : "0" (x));
#elif defined(__arm__) || defined(_ARM_)
retval = __rintf_internal(x);
#endif
return retval;
}