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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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16
Objects/floatobject.c
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@ -10,7 +10,7 @@
#include "pycore_interp.h" // _PyInterpreterState.float_state
#include "pycore_long.h" // _PyLong_GetOne()
#include "pycore_object.h" // _PyObject_Init()
#include "pycore_pymath.h" // _Py_ADJUST_ERANGE1()
#include "pycore_pymath.h" // _PY_SHORT_FLOAT_REPR
#include "pycore_pystate.h" // _PyInterpreterState_GET()
#include "pycore_structseq.h" // _PyStructSequence_FiniType()
@ -932,7 +932,7 @@ float___ceil___impl(PyObject *self)
ndigits <= 323). Returns a Python float, or sets a Python error and
returns NULL on failure (OverflowError and memory errors are possible). */
#ifndef PY_NO_SHORT_FLOAT_REPR
#if _PY_SHORT_FLOAT_REPR == 1
/* version of double_round that uses the correctly-rounded string<->double
conversions from Python/dtoa.c */
@ -989,7 +989,7 @@ double_round(double x, int ndigits) {
return result;
}
#else /* PY_NO_SHORT_FLOAT_REPR */
#else // _PY_SHORT_FLOAT_REPR == 0
/* fallback version, to be used when correctly rounded binary<->decimal
conversions aren't available */
@ -1039,7 +1039,7 @@ double_round(double x, int ndigits) {
return PyFloat_FromDouble(z);
}
#endif /* PY_NO_SHORT_FLOAT_REPR */
#endif // _PY_SHORT_FLOAT_REPR == 0
/* round a Python float v to the closest multiple of 10**-ndigits */
@ -2479,7 +2479,7 @@ _PyFloat_Unpack2(const unsigned char *p, int le)
f |= *p;
if (e == 0x1f) {
#ifdef PY_NO_SHORT_FLOAT_REPR
#if _PY_SHORT_FLOAT_REPR == 0
if (f == 0) {
/* Infinity */
return sign ? -Py_HUGE_VAL : Py_HUGE_VAL;
@ -2494,9 +2494,9 @@ _PyFloat_Unpack2(const unsigned char *p, int le)
"can't unpack IEEE 754 NaN "
"on platform that does not support NaNs");
return -1;
#endif /* #ifdef Py_NAN */
#endif // !defined(Py_NAN)
}
#else
#else // _PY_SHORT_FLOAT_REPR == 1
if (f == 0) {
/* Infinity */
return _Py_dg_infinity(sign);
@ -2505,7 +2505,7 @@ _PyFloat_Unpack2(const unsigned char *p, int le)
/* NaN */
return _Py_dg_stdnan(sign);
}
#endif /* #ifdef PY_NO_SHORT_FLOAT_REPR */
#endif // _PY_SHORT_FLOAT_REPR == 1
}
x = (double)f / 1024.0;