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| author | Benjamin Peterson <benjamin@python.org> | 2014-04-17 04:00:31 (GMT) |
|---|---|---|
| committer | Benjamin Peterson <benjamin@python.org> | 2014-04-17 04:00:31 (GMT) |
| commit | 8bdeb1672ce1d0412e1fcc6cff0821bb66f02c1a (patch) | |
| tree | 7b85e22dad6f12ebd3f33825d91c7d3855de38d2 /configure.ac | |
| parent | aedff520eab83c48848d2346d6f55cc1579182ef (diff) | |
| download | cpython-8bdeb1672ce1d0412e1fcc6cff0821bb66f02c1a.zip cpython-8bdeb1672ce1d0412e1fcc6cff0821bb66f02c1a.tar.gz cpython-8bdeb1672ce1d0412e1fcc6cff0821bb66f02c1a.tar.bz2 | |
support setting fpu precision on m68k (closes #20904)
Patch from Andreas Schwab.
Diffstat (limited to 'configure.ac')
| -rw-r--r-- | configure.ac | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/configure.ac b/configure.ac index 457819b..f2e4b1c 100644 --- a/configure.ac +++ b/configure.ac @@ -3810,6 +3810,19 @@ then [Define if we can use gcc inline assembler to get and set x87 control word]) fi +AC_MSG_CHECKING(whether we can use gcc inline assembler to get and set mc68881 fpcr) +AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[]], [[ + unsigned int fpcr; + __asm__ __volatile__ ("fmove.l %%fpcr,%0" : "=g" (fpcr)); + __asm__ __volatile__ ("fmove.l %0,%%fpcr" : : "g" (fpcr)); +]])],[have_gcc_asm_for_mc68881=yes],[have_gcc_asm_for_mc68881=no]) +AC_MSG_RESULT($have_gcc_asm_for_mc68881) +if test "$have_gcc_asm_for_mc68881" = yes +then + AC_DEFINE(HAVE_GCC_ASM_FOR_MC68881, 1, + [Define if we can use gcc inline assembler to get and set mc68881 fpcr]) +fi + # Detect whether system arithmetic is subject to x87-style double # rounding issues. The result of this test has little meaning on non # IEEE 754 platforms. On IEEE 754, test should return 1 if rounding |