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Description: m68k: Avoid a SIGILL when built with GCC 15
Reported to GCC upstream, but determined to be a cpython bug.
Bug-Gcc: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=122211
Author: John Paul Adrian Glaubitz <glaubitz@debian.org>, Michael Karcher <debian@mkarcher.dialup.fu-berlin.de>
--- a/Include/internal/pycore_pymath.h
+++ b/Include/internal/pycore_pymath.h
@@ -146,17 +146,17 @@ extern void _Py_set_387controlword(unsig
unsigned int old_fpcr, new_fpcr
#define _Py_SET_53BIT_PRECISION_START \
do { \
- __asm__ ("fmove.l %%fpcr,%0" : "=g" (old_fpcr)); \
+ __asm__ ("fmove.l %%fpcr,%0" : "=dm" (old_fpcr)); \
/* Set double precision / round to nearest. */ \
new_fpcr = (old_fpcr & ~0xf0) | 0x80; \
if (new_fpcr != old_fpcr) { \
- __asm__ volatile ("fmove.l %0,%%fpcr" : : "g" (new_fpcr));\
+ __asm__ volatile ("fmove.l %0,%%fpcr" : : "dm" (new_fpcr)); \
} \
} while (0)
#define _Py_SET_53BIT_PRECISION_END \
do { \
if (new_fpcr != old_fpcr) { \
- __asm__ volatile ("fmove.l %0,%%fpcr" : : "g" (old_fpcr)); \
+ __asm__ volatile ("fmove.l %0,%%fpcr" : : "dm" (old_fpcr)); \
} \
} while (0)
#endif
--- a/configure.ac
+++ b/configure.ac
@@ -6099,8 +6099,8 @@ AS_VAR_IF([ac_cv_gcc_asm_for_x87], [yes]
AC_CACHE_CHECK([whether we can use gcc inline assembler to get and set mc68881 fpcr], [ac_cv_gcc_asm_for_mc68881], [
AC_LINK_IFELSE( [AC_LANG_PROGRAM([[]], [[
unsigned int fpcr;
- __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr));
- __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr));
+ __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=dm" (fpcr));
+ __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "dm" (fpcr));
]])],[ac_cv_gcc_asm_for_mc68881=yes],[ac_cv_gcc_asm_for_mc68881=no])
])
AS_VAR_IF([ac_cv_gcc_asm_for_mc68881], [yes], [
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