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cpython/Python/pymath.c
Victor Stinner 00ffc4513d
bpo-45440: Remove pymath.c fallbacks (GH-28977)
Remove fallbacks for missing round(), copysign() and hypot() in
Python/pymath.c. Python now requires these functions to build.

These fallbacks were needed on Visual Studio 2012 and older. They are
no longer needed since Visual Stuido 2013. Python is now built with
Visual Studio 2017 or newer since Python 3.6.
2021-10-15 19:45:34 +02:00

20 lines
478 B
C

#include "Python.h"
#ifdef HAVE_GCC_ASM_FOR_X87
// Inline assembly for getting and setting the 387 FPU control word on
// GCC/x86.
#ifdef _Py_MEMORY_SANITIZER
__attribute__((no_sanitize_memory))
#endif
unsigned short _Py_get_387controlword(void) {
unsigned short cw;
__asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
return cw;
}
void _Py_set_387controlword(unsigned short cw) {
__asm__ __volatile__ ("fldcw %0" : : "m" (cw));
}
#endif // HAVE_GCC_ASM_FOR_X87