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py/objfloat: Change MSVC workaround for NAN being a constant.

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It's actually a bug in the Windows SDK, not MSVC, as per
https://stackoverflow.com/questions/79195142/recent-msvc-versions-dont-treat-nan-as-constant-workaround/79324199#79324199

Thanks to @stinos.

Signed-off-by: Damien George <damien@micropython.org>
This commit is contained in:
Damien George
2025-06-10 22:15:37 +10:00
parent 2ce63b1420
commit ca80aabf21
1 changed files with 5 additions and 7 deletions
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12
py/objfloat.c
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@@ -34,6 +34,11 @@
#if MICROPY_PY_BUILTINS_FLOAT #if MICROPY_PY_BUILTINS_FLOAT
// Workaround a bug in Windows SDK version 10.0.26100.0, where NAN is no longer constant.
#if defined(_MSC_VER) && !defined(_UCRT_NOISY_NAN)
#define _UCRT_NOISY_NAN
#endif
#include <math.h> #include <math.h>
#include "py/formatfloat.h" #include "py/formatfloat.h"
@@ -47,13 +52,6 @@
#define M_PI (3.14159265358979323846) #define M_PI (3.14159265358979323846)
#endif #endif
// Workaround a bug in recent MSVC where NAN is no longer constant.
// (By redefining back to the previous MSVC definition of NAN)
#if defined(_MSC_VER) && _MSC_VER >= 1942
#undef NAN
#define NAN (-(float)(((float)(1e+300 * 1e+300)) * 0.0F))
#endif
typedef struct _mp_obj_float_t { typedef struct _mp_obj_float_t {
mp_obj_base_t base; mp_obj_base_t base;
mp_float_t value; mp_float_t value;