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configure.ac : Prepare for x86_64 initrinsics based optimisations. 

Detect presence of <x86intrin.h> and set FLAC__HAS_X86INTRIN.
Define FLAC__CPU_X86_64 when CPU is x96_64.
This commit is contained in:
Erik de Castro Lopo 2013-09-15 09:42:29 +10:00
parent d11c66ffce
commit b72540b43c
1 changed files with 12 additions and 2 deletions
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14
configure.ac
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@ -59,7 +59,7 @@ AC_C_INLINE
AC_C_VARARRAYS
AC_C_TYPEOF
AC_CHECK_HEADERS([stdint.h inttypes.h byteswap.h sys/param.h termios.h])
AC_CHECK_HEADERS([stdint.h inttypes.h byteswap.h sys/param.h termios.h x86intrin.h])
AC_HEADER_TIOCGWINSZ
@ -102,11 +102,18 @@ asm_optimisation=no
case "$host_cpu" in
x86_64)
if test $ac_cv_sizeof_voidp = 4 ; then
# This must be a 32 bit user space running on 64 bit kernel so treat
# this as ia32.
cpu_ia32=true
AC_DEFINE(FLAC__CPU_IA32)
AH_TEMPLATE(FLAC__CPU_IA32, [define if building for ia32/i386])
asm_optimisation=$asm_opt
else
# x86_64 user space and kernel.
cpu_x86_64=true
AC_DEFINE(FLAC__CPU_X86_64)
AH_TEMPLATE(FLAC__CPU_X86_64, [define if building for x86_64])
fi
asm_optimisation=$asm_opt
;;
i*86)
cpu_ia32=true
@ -127,10 +134,13 @@ case "$host_cpu" in
asm_optimisation=$asm_opt
;;
esac
AM_CONDITIONAL(FLAC__CPU_X86_64, test "x$cpu_x86_64" = xtrue)
AM_CONDITIONAL(FLaC__CPU_IA32, test "x$cpu_ia32" = xtrue)
AM_CONDITIONAL(FLaC__CPU_PPC, test "x$cpu_ppc" = xtrue)
AM_CONDITIONAL(FLaC__CPU_SPARC, test "x$cpu_sparc" = xtrue)
AC_DEFINE_UNQUOTED([FLAC__HAS_X86INTRIN],${HAVE_X86INTRIN_H}, [Set to 1 if <x86intrin.h> is available.])
case "$host" in
i386-*-openbsd3.[[0-3]]) OBJ_FORMAT=aoutb ;;
*-*-cygwin|*mingw*) OBJ_FORMAT=win32 ;;