newlib/winsup/cygwin/math/cossin.c

76 lines
1.9 KiB
C
Raw Normal View History

/**
* 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.
*/
void sincos (double __x, double *p_sin, double *p_cos);
void sincosl (long double __x, long double *p_sin, long double *p_cos);
void sincosf (float __x, float *p_sin, float *p_cos);
void sincos (double __x, double *p_sin, double *p_cos)
{
long double c, s;
__asm__ __volatile__ ("fsincos\n\t"
"fnstsw %%ax\n\t"
"testl $0x400, %%eax\n\t"
"jz 1f\n\t"
"fldpi\n\t"
"fadd %%st(0)\n\t"
"fxch %%st(1)\n\t"
"2: fprem1\n\t"
"fnstsw %%ax\n\t"
"testl $0x400, %%eax\n\t"
"jnz 2b\n\t"
"fstp %%st(1)\n\t"
"fsincos\n\t"
"1:" : "=t" (c), "=u" (s) : "0" (__x));
*p_sin = (double) s;
*p_cos = (double) c;
}
void sincosf (float __x, float *p_sin, float *p_cos)
{
long double c, s;
__asm__ __volatile__ ("fsincos\n\t"
"fnstsw %%ax\n\t"
"testl $0x400, %%eax\n\t"
"jz 1f\n\t"
"fldpi\n\t"
"fadd %%st(0)\n\t"
"fxch %%st(1)\n\t"
"2: fprem1\n\t"
"fnstsw %%ax\n\t"
"testl $0x400, %%eax\n\t"
"jnz 2b\n\t"
"fstp %%st(1)\n\t"
"fsincos\n\t"
"1:" : "=t" (c), "=u" (s) : "0" (__x));
*p_sin = (float) s;
*p_cos = (float) c;
}
void sincosl (long double __x, long double *p_sin, long double *p_cos)
{
long double c, s;
__asm__ __volatile__ ("fsincos\n\t"
"fnstsw %%ax\n\t"
"testl $0x400, %%eax\n\t"
"jz 1f\n\t"
"fldpi\n\t"
"fadd %%st(0)\n\t"
"fxch %%st(1)\n\t"
"2: fprem1\n\t"
"fnstsw %%ax\n\t"
"testl $0x400, %%eax\n\t"
"jnz 2b\n\t"
"fstp %%st(1)\n\t"
"fsincos\n\t"
"1:" : "=t" (c), "=u" (s) : "0" (__x));
*p_sin = s;
*p_cos = c;
}