diff --git a/Include/pymath.h b/Include/pymath.h
@@ -227,12 +227,4 @@ PyAPI_FUNC(void) _Py_set_387controlword(unsigned short);
 * behavior. */
#define _Py_InIntegralTypeRange(type, v) (_Py_IntegralTypeMin(type) <= v && v <= _Py_IntegralTypeMax(type))

-/* Return the smallest integer k such that n < 2**k, or 0 if n == 0.
- * Equivalent to floor(log2(x))+1.  Also equivalent to: bitwidth_of_type -
- * count_leading_zero_bits(x)
- */
-#ifndef Py_LIMITED_API
-PyAPI_FUNC(unsigned int) _Py_bit_length(unsigned long d);
-#endif
-
#endif /* Py_PYMATH_H */
diff --git a/Modules/mathmodule.c b/Modules/mathmodule.c
@@ -53,6 +53,7 @@ raised for division by zero and mod by zero.
 */

#include "Python.h"
#include "pycore_dtoa.h"
#include "_math.h"


diff --git a/Python/pymath.c b/Python/pymath.c
@@ -79,18 +79,3 @@ round(double x)
    return copysign(y, x);
}
#endif /* HAVE_ROUND */
-
-static const unsigned int BitLengthTable[32] = {
-    0, 1, 2, 2, 3, 3, 3, 3, 4, 4, 4, 4, 4, 4, 4, 4,
-    5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5, 5
-};
-
-unsigned int _Py_bit_length(unsigned long d) {
-   unsigned int d_bits = 0;
-   while (d >= 32) {
-       d_bits += 6;
-       d >>= 6;
-   }
-   d_bits += BitLengthTable[d];
-   return d_bits;
-}
-Original file line number
+Diff line change
@@ Expand Up / @@ -53,6 +53,7 @@ raised for division by zero and mod by zero. @@
      */
     #include "Python.h"
     #include "pycore_dtoa.h"
     #include "_math.h"
@@ Expand Down @@