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v0.5.1
https://github.com/python/cpython
Revision dae5d728bc3f1d4039b64e4ec3a9036fd5d19587 authored by Miss Islington (bot) on 10 November 2020, 19:58:27 UTC, committed by GitHub on 10 November 2020, 19:58:27 UTC
Fix an assertion error in format() in debug build for floating point formatting with "n" format, zero padding and small width. Release build is not impacted. Patch by Karthikeyan Singaravelan. (cherry picked from commit 3f7983a25a3d19779283c707fbdd5bc91b1587ef) Co-authored-by: Xtreak <tir.karthi@gmail.com>
1 parent a63234c
Tip revision: dae5d728bc3f1d4039b64e4ec3a9036fd5d19587 authored by Miss Islington (bot) on 10 November 2020, 19:58:27 UTC
bpo-35560: Remove assertion from format(float, "n") (GH-11288) (GH-23231)
bpo-35560: Remove assertion from format(float, "n") (GH-11288) (GH-23231)
Tip revision: dae5d72
pymath.c
#include "Python.h"
#ifdef X87_DOUBLE_ROUNDING
/* On x86 platforms using an x87 FPU, this function is called from the
Py_FORCE_DOUBLE macro (defined in pymath.h) to force a floating-point
number out of an 80-bit x87 FPU register and into a 64-bit memory location,
thus rounding from extended precision to double precision. */
double _Py_force_double(double x)
{
volatile double y;
y = x;
return y;
}
#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
__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
#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 */
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