EmbeddedPkg: Extend NvVarStoreFormattedLib LIBRARY_CLASS

[mirror_edk2.git] / AppPkg / Applications / Python / Python-2.7.2 / Python / pymath.c

#include "Python.h"\r
\r
#ifdef X87_DOUBLE_ROUNDING\r
/* On x86 platforms using an x87 FPU, this function is called from the\r
   Py_FORCE_DOUBLE macro (defined in pymath.h) to force a floating-point\r
   number out of an 80-bit x87 FPU register and into a 64-bit memory location,\r
   thus rounding from extended precision to double precision. */\r
double _Py_force_double(double x)\r
{\r
    volatile double y;\r
    y = x;\r
    return y;\r
}\r
#endif\r
\r
#ifdef HAVE_GCC_ASM_FOR_X87\r
\r
/* inline assembly for getting and setting the 387 FPU control word on\r
   gcc/x86 */\r
\r
unsigned short _Py_get_387controlword(void) {\r
    unsigned short cw;\r
    __asm__ __volatile__ ("fnstcw %0" : "=m" (cw));\r
    return cw;\r
}\r
\r
void _Py_set_387controlword(unsigned short cw) {\r
    __asm__ __volatile__ ("fldcw %0" : : "m" (cw));\r
}\r
\r
#endif\r
\r
\r
#ifndef HAVE_HYPOT\r
double hypot(double x, double y)\r
{\r
    double yx;\r
\r
    x = fabs(x);\r
    y = fabs(y);\r
    if (x < y) {\r
        double temp = x;\r
        x = y;\r
        y = temp;\r
    }\r
    if (x == 0.)\r
        return 0.;\r
    else {\r
        yx = y/x;\r
        return x*sqrt(1.+yx*yx);\r
    }\r
}\r
#endif /* HAVE_HYPOT */\r
\r
#ifndef HAVE_COPYSIGN\r
double\r
copysign(double x, double y)\r
{\r
    /* use atan2 to distinguish -0. from 0. */\r
    if (y > 0. || (y == 0. && atan2(y, -1.) > 0.)) {\r
        return fabs(x);\r
    } else {\r
        return -fabs(x);\r
    }\r
}\r
#endif /* HAVE_COPYSIGN */\r
\r
#ifndef HAVE_ROUND\r
double\r
round(double x)\r
{\r
    double absx, y;\r
    absx = fabs(x);\r
    y = floor(absx);\r
    if (absx - y >= 0.5)\r
    y += 1.0;\r
    return copysign(y, x);\r
}\r
#endif /* HAVE_ROUND */\r