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9b29358511
Status lines for Emacs and Vim have been added to Python sources so they'll be easier to edit using Python's preferred coding style. Some DNS helper functions have been broken up into multiple files. It's nice to have one function per file whenever possible, since that way we don't need -ffunction-sections. Another reason it's good to have small source files, is because the build will be enforcing resource limits on compilation and testing soon.
39 lines
1.7 KiB
C
39 lines
1.7 KiB
C
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:4;tab-width:8;coding:utf-8 -*-│
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│vi: set net ft=c ts=4 sts=4 sw=4 fenc=utf-8 :vi│
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╞══════════════════════════════════════════════════════════════════════════════╡
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│ Python 3 │
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│ https://docs.python.org/3/license.html │
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╚─────────────────────────────────────────────────────────────────────────────*/
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#include "third_party/python/pyconfig.h"
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/* clang-format off */
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#ifdef X87_DOUBLE_ROUNDING
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/* On x86 platforms using an x87 FPU, this function is called from the
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Py_FORCE_DOUBLE macro (defined in pymath.h) to force a floating-point
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number out of an 80-bit x87 FPU register and into a 64-bit memory location,
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thus rounding from extended precision to double precision. */
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double _Py_force_double(double x)
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{
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volatile double y;
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y = x;
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return y;
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}
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#endif
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#ifdef HAVE_GCC_ASM_FOR_X87
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/* inline assembly for getting and setting the 387 FPU control word on
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gcc/x86 */
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#ifdef _Py_MEMORY_SANITIZER
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__attribute__((no_sanitize_memory))
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#endif
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unsigned short _Py_get_387controlword(void) {
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unsigned short cw;
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__asm__ __volatile__ ("fnstcw %0" : "=m" (cw));
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return cw;
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}
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void _Py_set_387controlword(unsigned short cw) {
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__asm__ __volatile__ ("fldcw %0" : : "m" (cw));
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}
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#else
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#error wut
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#endif
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