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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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15
Modules/cmathmodule.c
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@ -7,7 +7,8 @@
#endif
#include "Python.h"
#include "pycore_dtoa.h"
#include "pycore_pymath.h" // _PY_SHORT_FLOAT_REPR
#include "pycore_dtoa.h" // _Py_dg_stdnan()
/* we need DBL_MAX, DBL_MIN, DBL_EPSILON, DBL_MANT_DIG and FLT_RADIX from
float.h. We assume that FLT_RADIX is either 2 or 16. */
#include <float.h>
@ -89,14 +90,14 @@ else {
/* Constants cmath.inf, cmath.infj, cmath.nan, cmath.nanj.
cmath.nan and cmath.nanj are defined only when either
PY_NO_SHORT_FLOAT_REPR is *not* defined (which should be
_PY_SHORT_FLOAT_REPR is 1 (which should be
the most common situation on machines using an IEEE 754
representation), or Py_NAN is defined. */
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;
@ -112,12 +113,12 @@ c_infj(void)
return r;
}
#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;
@ -1281,7 +1282,7 @@ cmath_exec(PyObject *mod)
PyComplex_FromCComplex(c_infj())) < 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(mod, "nan", PyFloat_FromDouble(m_nan())) < 0) {
return -1;
}
@ -1426,4 +1427,4 @@ PyMODINIT_FUNC
PyInit_cmath(void)
{
return PyModuleDef_Init(&cmathmodule);
}
}