From b5c8e6e1334f1756ead5e2cd5966731844428e2c Mon Sep 17 00:00:00 2001
From: Chris Eibl <138194463+chris-eibl@users.noreply.github.com>
Date: Thu, 19 Feb 2026 20:45:59 +0100
Subject: [PATCH] gh-100239: Use ``PyFloat_AS_DOUBLE`` and `_PyLong_IsZero`` in
 the float / compactlong specializations (#144826)

---
 .../2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst   |  2 ++
 Python/specialize.c                                  | 12 ++++++------
 2 files changed, 8 insertions(+), 6 deletions(-)
 create mode 100644 Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst

diff --git a/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst
new file mode 100644
index 00000000000..3cfc3e930d1
--- /dev/null
+++ b/Misc/NEWS.d/next/Core_and_Builtins/2026-02-17-21-04-03.gh-issue-100239.LyVabQ.rst
@@ -0,0 +1,2 @@
+Speedup ``BINARY_OP_EXTEND`` for exact floats and medium-size integers by up
+to 15%. Patch by Chris Eibl.
diff --git a/Python/specialize.c b/Python/specialize.c
index 4d3ba4acbbf..1eabdb1b5b1 100644
--- a/Python/specialize.c
+++ b/Python/specialize.c
@@ -2100,7 +2100,7 @@ float_compactlong_guard(PyObject *lhs, PyObject *rhs)
 {
     return (
         PyFloat_CheckExact(lhs) &&
-        !isnan(PyFloat_AsDouble(lhs)) &&
+        !isnan(PyFloat_AS_DOUBLE(lhs)) &&
         PyLong_CheckExact(rhs) &&
         _PyLong_IsCompact((PyLongObject *)rhs)
     );
@@ -2110,7 +2110,7 @@ static inline int
 nonzero_float_compactlong_guard(PyObject *lhs, PyObject *rhs)
 {
     return (
-        float_compactlong_guard(lhs, rhs) && !PyLong_IsZero(rhs)
+        float_compactlong_guard(lhs, rhs) && !_PyLong_IsZero((PyLongObject*)rhs)
     );
 }
 
@@ -2118,7 +2118,7 @@ nonzero_float_compactlong_guard(PyObject *lhs, PyObject *rhs)
     static PyObject * \
     (NAME)(PyObject *lhs, PyObject *rhs) \
     { \
-        double lhs_val = PyFloat_AsDouble(lhs); \
+        double lhs_val = PyFloat_AS_DOUBLE(lhs); \
         Py_ssize_t rhs_val = _PyLong_CompactValue((PyLongObject *)rhs); \
         return PyFloat_FromDouble(lhs_val OP rhs_val); \
     }
@@ -2137,7 +2137,7 @@ compactlong_float_guard(PyObject *lhs, PyObject *rhs)
         PyLong_CheckExact(lhs) &&
         _PyLong_IsCompact((PyLongObject *)lhs) &&
         PyFloat_CheckExact(rhs) &&
-        !isnan(PyFloat_AsDouble(rhs))
+        !isnan(PyFloat_AS_DOUBLE(rhs))
     );
 }
 
@@ -2145,7 +2145,7 @@ static inline int
 nonzero_compactlong_float_guard(PyObject *lhs, PyObject *rhs)
 {
     return (
-        compactlong_float_guard(lhs, rhs) && PyFloat_AsDouble(rhs) != 0.0
+        compactlong_float_guard(lhs, rhs) && PyFloat_AS_DOUBLE(rhs) != 0.0
     );
 }
 
@@ -2153,7 +2153,7 @@ nonzero_compactlong_float_guard(PyObject *lhs, PyObject *rhs)
     static PyObject * \
     (NAME)(PyObject *lhs, PyObject *rhs) \
     { \
-        double rhs_val = PyFloat_AsDouble(rhs); \
+        double rhs_val = PyFloat_AS_DOUBLE(rhs); \
         Py_ssize_t lhs_val = _PyLong_CompactValue((PyLongObject *)lhs); \
         return PyFloat_FromDouble(lhs_val OP rhs_val); \
     }