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Perform build and magnum tuning

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Building o//third_party/python now takes 5 seconds on my PC

This change works towards modifying Python to use runtime dispatching
when appropriate. For example, when loading the magnums in the socket
module, it's a good idea to check if the magnum is zero, because that
means the local system platform doesn't support it.
This commit is contained in:
Justine Tunney 2021-08-10 10:26:13 -07:00
parent ee7e296339
commit d26d7ae0e4
1028 changed files with 6576 additions and 172777 deletions
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54
third_party/python/Python/pymath.c vendored
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@ -1,4 +1,5 @@
#include "Python.h"
/* clang-format off */
#include "third_party/python/Include/Python.h"
#ifdef X87_DOUBLE_ROUNDING
/* On x86 platforms using an x87 FPU, this function is called from the
@ -14,7 +15,6 @@ double _Py_force_double(double x)
#endif
#ifdef HAVE_GCC_ASM_FOR_X87
/* inline assembly for getting and setting the 387 FPU control word on
gcc/x86 */
#ifdef _Py_MEMORY_SANITIZER
@ -25,57 +25,7 @@ unsigned short _Py_get_387controlword(void) {
__asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
return cw;
}
void _Py_set_387controlword(unsigned short cw) {
__asm__ __volatile__ ("fldcw %0" : : "m" (cw));
}
#endif
#ifndef HAVE_HYPOT
double hypot(double x, double y)
{
double yx;
x = fabs(x);
y = fabs(y);
if (x < y) {
double temp = x;
x = y;
y = temp;
}
if (x == 0.)
return 0.;
else {
yx = y/x;
return x*sqrt(1.+yx*yx);
}
}
#endif /* HAVE_HYPOT */
#ifndef HAVE_COPYSIGN
double
copysign(double x, double y)
{
/* use atan2 to distinguish -0. from 0. */
if (y > 0. || (y == 0. && atan2(y, -1.) > 0.)) {
return fabs(x);
} else {
return -fabs(x);
}
}
#endif /* HAVE_COPYSIGN */
#ifndef HAVE_ROUND
double
round(double x)
{
double absx, y;
absx = fabs(x);
y = floor(absx);
if (absx - y >= 0.5)
y += 1.0;
return copysign(y, x);
}
#endif /* HAVE_ROUND */