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bpo-45412: Add _PY_SHORT_FLOAT_REPR macro (GH-31171)

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Remove the HAVE_PY_SET_53BIT_PRECISION macro (moved to the internal
C API).

* Move HAVE_PY_SET_53BIT_PRECISION macro to pycore_pymath.h.
* Replace PY_NO_SHORT_FLOAT_REPR macro with _PY_SHORT_FLOAT_REPR
  macro which is always defined. gcc -Wundef emits a warning when
  using _PY_SHORT_FLOAT_REPR but the macro is not defined, if
  pycore_pymath.h include was forgotten.
This commit is contained in:
Victor Stinner 2022-02-23 18:16:23 +01:00 • committed by GitHub
parent 375a56bd40
commit 9bbdde2180
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GPG key ID: 4AEE18F83AFDEB23
11 changed files with 104 additions and 96 deletions
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9
Modules/mathmodule.c
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@ -62,6 +62,7 @@ raised for division by zero and mod by zero.
#include "pycore_call.h" // _PyObject_CallNoArgs()
#include "pycore_dtoa.h" // _Py_dg_infinity()
#include "pycore_long.h" // _PyLong_GetZero()
#include "pycore_pymath.h" // _PY_SHORT_FLOAT_REPR
/* For DBL_EPSILON in _math.h */
#include <float.h>
/* For _Py_log1p with workarounds for buggy handling of zeros. */
@ -272,7 +273,7 @@ lanczos_sum(double x)
static double
m_inf(void)
{
#ifndef PY_NO_SHORT_FLOAT_REPR
#if _PY_SHORT_FLOAT_REPR == 1
return _Py_dg_infinity(0);
#else
return Py_HUGE_VAL;
@ -282,12 +283,12 @@ m_inf(void)
/* Constant nan value, generated in the same way as float('nan'). */
/* We don't currently assume that Py_NAN is defined everywhere. */
#if !defined(PY_NO_SHORT_FLOAT_REPR) || defined(Py_NAN)
#if _PY_SHORT_FLOAT_REPR == 1 || defined(Py_NAN)
static double
m_nan(void)
{
#ifndef PY_NO_SHORT_FLOAT_REPR
#if _PY_SHORT_FLOAT_REPR == 1
return _Py_dg_stdnan(0);
#else
return Py_NAN;
@ -3837,7 +3838,7 @@ math_exec(PyObject *module)
if (PyModule_AddObject(module, "inf", PyFloat_FromDouble(m_inf())) < 0) {
return -1;
}
#if !defined(PY_NO_SHORT_FLOAT_REPR) || defined(Py_NAN)
#if _PY_SHORT_FLOAT_REPR == 1 || defined(Py_NAN)
if (PyModule_AddObject(module, "nan", PyFloat_FromDouble(m_nan())) < 0) {
return -1;
}