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| author | Benjamin Peterson <benjamin@python.org> | 2014-04-17 00:00:31 -0400 |
|---|---|---|
| committer | Benjamin Peterson <benjamin@python.org> | 2014-04-17 00:00:31 -0400 |
| commit | 8bdeb1672ce1d0412e1fcc6cff0821bb66f02c1a (patch) | |
| tree | 7b85e22dad6f12ebd3f33825d91c7d3855de38d2 /Include/pyport.h | |
| parent | aedff520eab83c48848d2346d6f55cc1579182ef (diff) | |
| download | cpython-git-8bdeb1672ce1d0412e1fcc6cff0821bb66f02c1a.tar.gz | |
support setting fpu precision on m68k (closes #20904)
Patch from Andreas Schwab.
Diffstat (limited to 'Include/pyport.h')
| -rw-r--r-- | Include/pyport.h | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/Include/pyport.h b/Include/pyport.h index c706213c87..69deb9f8bf 100644 --- a/Include/pyport.h +++ b/Include/pyport.h @@ -588,6 +588,25 @@ extern "C" { } while (0) #endif +#ifdef HAVE_GCC_ASM_FOR_MC68881 +#define HAVE_PY_SET_53BIT_PRECISION 1 +#define _Py_SET_53BIT_PRECISION_HEADER \ + unsigned int old_fpcr, new_fpcr +#define _Py_SET_53BIT_PRECISION_START \ + do { \ + __asm__ ("fmove.l %%fpcr,%0" : "=g" (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)); \ + } while (0) +#define _Py_SET_53BIT_PRECISION_END \ + do { \ + if (new_fpcr != old_fpcr) \ + __asm__ volatile ("fmove.l %0,%%fpcr" : : "g" (old_fpcr)); \ + } while (0) +#endif + /* default definitions are empty */ #ifndef HAVE_PY_SET_53BIT_PRECISION #define _Py_SET_53BIT_PRECISION_HEADER |