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add declaration of the "double trunc (double _x)" and winsock2.h

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This allow to build a windows version of the nimrod compiler.
This commit is contained in:
seyko 2015-03-03 22:41:55 +03:00
parent 4b61f7f04b
commit 351e2ec334
1 changed files with 21 additions and 0 deletions
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21
win32/include/math.h
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@ -597,6 +597,27 @@ extern "C" {
return retval; return retval;
} }
#define FE_TONEAREST 0x0000
#define FE_DOWNWARD 0x0400
#define FE_UPWARD 0x0800
#define FE_TOWARDZERO 0x0c00
__CRT_INLINE double trunc (double _x)
{
double retval;
unsigned short saved_cw;
unsigned short tmp_cw;
__asm__ ("fnstcw %0;" : "=m" (saved_cw)); /* save FPU control word */
tmp_cw = (saved_cw & ~(FE_TONEAREST | FE_DOWNWARD | FE_UPWARD | FE_TOWARDZERO))
| FE_TOWARDZERO;
__asm__ ("fldcw %0;" : : "m" (tmp_cw));
__asm__ ("fldl %1;"
"frndint;"
"fstl %0;" : "=m" (retval) : "m" (_x)); /* round towards zero */
__asm__ ("fldcw %0;" : : "m" (saved_cw) ); /* restore saved control word */
return retval;
}
/* 7.12.9.6 */ /* 7.12.9.6 */
/* round away from zero, regardless of fpu control word settings */ /* round away from zero, regardless of fpu control word settings */
extern double __cdecl round (double); extern double __cdecl round (double);