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Default SSE2 off on iX86, since gcc will use it for floating point op…

…erations

even if -mfpmath=387 is set.  Grr...
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slouken committed Dec 7, 2008
1 parent c490852 commit fd59d053e457a0ffe95f88303afb31b5ed04bcde
Showing with 26 additions and 26 deletions.
  1. +26 −26 configure.in
@@ -285,6 +285,30 @@ AC_HELP_STRING([--enable-assembly], [Enable assembly routines [[default=yes]]]),
if test x$enable_assembly = xyes; then
AC_DEFINE(SDL_ASSEMBLY_ROUTINES)

# Make sure that we don't generate floating point code that would
# cause illegal instruction exceptions on older processors
case "$host" in
*-*-darwin*)
# Don't need to worry about Apple hardware, it's all SSE capable
default_ssemath=yes
;;
*64-*-*)
# x86 64-bit architectures all have SSE instructions
default_ssemath=yes
;;
*)
default_ssemath=no
;;
esac
AC_ARG_ENABLE(ssemath,
AC_HELP_STRING([--enable-ssemath], [Allow GCC to use SSE floating point math [[default=no]]]),
, enable_ssemath=$default_ssemath)
if test x$enable_ssemath = xno; then
if test x$have_gcc_sse = xyes -o x$have_gcc_sse2 = xyes; then
EXTRA_CFLAGS="$EXTRA_CFLAGS -mfpmath=387"
fi
fi

dnl Check for various instruction support
AC_ARG_ENABLE(mmx,
AC_HELP_STRING([--enable-mmx], [use MMX assembly routines [[default=yes]]]),
@@ -368,8 +392,8 @@ AC_HELP_STRING([--enable-sse], [use SSE assembly routines [[default=yes]]]),
fi

AC_ARG_ENABLE(sse2,
AC_HELP_STRING([--enable-sse2], [use SSE2 assembly routines [[default=yes]]]),
, enable_sse2=yes)
AC_HELP_STRING([--enable-sse2], [use SSE2 assembly routines [[default=no]]]),
, enable_sse2=$default_ssemath)
if test x$enable_sse2 = xyes; then
save_CFLAGS="$CFLAGS"
have_gcc_sse2=no
@@ -394,30 +418,6 @@ AC_HELP_STRING([--enable-sse2], [use SSE2 assembly routines [[default=yes]]]),
fi
fi

# Make sure that we don't generate floating point code that would
# cause illegal instruction exceptions on older processors
case "$host" in
*-*-darwin*)
# Don't need to worry about Apple hardware, it's all SSE capable
default_ssemath=yes
;;
*64-*-*)
# x86 64-bit architectures all have SSE instructions
default_ssemath=yes
;;
*)
default_ssemath=no
;;
esac
AC_ARG_ENABLE(ssemath,
AC_HELP_STRING([--enable-ssemath], [Allow GCC to use SSE floating point math [[default=no]]]),
, enable_ssemath=$default_ssemath)
if test x$enable_ssemath = xno; then
if test x$have_gcc_sse = xyes -o x$have_gcc_sse2 = xyes; then
EXTRA_CFLAGS="$EXTRA_CFLAGS -mfpmath=387"
fi
fi

AC_ARG_ENABLE(altivec,
AC_HELP_STRING([--enable-altivec], [use Altivec assembly routines [[default=yes]]]),
, enable_altivec=yes)

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