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|
dnl AG_GST_ARCH
dnl sets up defines and automake conditionals for host architecture
dnl checks endianness
dnl defines HOST_CPU
AC_DEFUN([AG_GST_ARCH],
[
AC_REQUIRE([AC_CANONICAL_HOST]) dnl we use host_ variables
dnl Determine CPU
case "x${host_cpu}" in
xi?86 | xk? | xi?86_64)
HAVE_CPU_I386=yes
AC_DEFINE(HAVE_CPU_I386, 1, [Define if the host CPU is an x86])
dnl FIXME could use some better detection
dnl (ie CPUID)
case "x${host_cpu}" in
xi386 | xi486) ;;
*)
AC_DEFINE(HAVE_RDTSC, 1, [Define if RDTSC is available]) ;;
esac ;;
xpowerpc)
HAVE_CPU_PPC=yes
AC_DEFINE(HAVE_CPU_PPC, 1, [Define if the host CPU is a PowerPC]) ;;
xpowerpc64)
HAVE_CPU_PPC64=yes
AC_DEFINE(HAVE_CPU_PPC64, 1, [Define if the host CPU is a 64 bit PowerPC]) ;;
xalpha*)
HAVE_CPU_ALPHA=yes
AC_DEFINE(HAVE_CPU_ALPHA, 1, [Define if the host CPU is an Alpha]) ;;
xarm*)
HAVE_CPU_ARM=yes
AC_DEFINE(HAVE_CPU_ARM, 1, [Define if the host CPU is an ARM]) ;;
xsparc*)
HAVE_CPU_SPARC=yes
AC_DEFINE(HAVE_CPU_SPARC, 1, [Define if the host CPU is a SPARC]) ;;
xmips*)
HAVE_CPU_MIPS=yes
AC_DEFINE(HAVE_CPU_MIPS, 1, [Define if the host CPU is a MIPS]) ;;
xhppa*)
HAVE_CPU_HPPA=yes
AC_DEFINE(HAVE_CPU_HPPA, 1, [Define if the host CPU is a HPPA]) ;;
xs390*)
HAVE_CPU_S390=yes
AC_DEFINE(HAVE_CPU_S390, 1, [Define if the host CPU is a S390]) ;;
xia64*)
HAVE_CPU_IA64=yes
AC_DEFINE(HAVE_CPU_IA64, 1, [Define if the host CPU is a IA64]) ;;
xm68k*)
HAVE_CPU_M68K=yes
AC_DEFINE(HAVE_CPU_M68K, 1, [Define if the host CPU is a M68K]) ;;
xx86_64)
HAVE_CPU_X86_64=yes
AC_DEFINE(HAVE_CPU_X86_64, 1, [Define if the host CPU is a x86_64]) ;;
xcris)
HAVE_CPU_CRIS=yes
AC_DEFINE(HAVE_CPU_CRIS, 1, [Define if the host CPU is a CRIS]) ;;
xcrisv32)
HAVE_CPU_CRISV32=yes
AC_DEFINE(HAVE_CPU_CRISV32, 1, [Define if the host CPU is a CRISv32]) ;;
esac
dnl Determine endianness
AC_C_BIGENDIAN
AM_CONDITIONAL(HAVE_CPU_I386, test "x$HAVE_CPU_I386" = "xyes")
AM_CONDITIONAL(HAVE_CPU_PPC, test "x$HAVE_CPU_PPC" = "xyes")
AM_CONDITIONAL(HAVE_CPU_PPC64, test "x$HAVE_CPU_PPC64" = "xyes")
AM_CONDITIONAL(HAVE_CPU_ALPHA, test "x$HAVE_CPU_ALPHA" = "xyes")
AM_CONDITIONAL(HAVE_CPU_ARM, test "x$HAVE_CPU_ARM" = "xyes")
AM_CONDITIONAL(HAVE_CPU_SPARC, test "x$HAVE_CPU_SPARC" = "xyes")
AM_CONDITIONAL(HAVE_CPU_HPPA, test "x$HAVE_CPU_HPPA" = "xyes")
AM_CONDITIONAL(HAVE_CPU_MIPS, test "x$HAVE_CPU_MIPS" = "xyes")
AM_CONDITIONAL(HAVE_CPU_S390, test "x$HAVE_CPU_S390" = "xyes")
AM_CONDITIONAL(HAVE_CPU_IA64, test "x$HAVE_CPU_IA64" = "xyes")
AM_CONDITIONAL(HAVE_CPU_M68K, test "x$HAVE_CPU_M68K" = "xyes")
AM_CONDITIONAL(HAVE_CPU_X86_64, test "x$HAVE_CPU_X86_64" = "xyes")
AM_CONDITIONAL(HAVE_CPU_CRIS, test "x$HAVE_CPU_CRIS" = "xyes")
AM_CONDITIONAL(HAVE_CPU_CRISV32, test "x$HAVE_CPU_CRISV32" = "xyes")
AC_DEFINE_UNQUOTED(HOST_CPU, "$host_cpu", [the host CPU])
])
dnl check if unaligned memory access works correctly
AC_DEFUN([AG_GST_UNALIGNED_ACCESS], [
AC_MSG_CHECKING([if unaligned memory access works correctly])
if test x"$as_cv_unaligned_access" = x ; then
case $host in
alpha*|arm*|hp*|mips*|sh*|sparc*|ia64*)
_AS_ECHO_N([(blacklisted) ])
as_cv_unaligned_access=no
;;
i?86*|powerpc*|m68k*|cris*)
_AS_ECHO_N([(whitelisted) ])
as_cv_unaligned_access=yes
;;
esac
else
_AS_ECHO_N([(cached) ])
fi
if test x"$as_cv_unaligned_access" = x ; then
AC_TRY_RUN([
int main(int argc, char **argv)
{
char array[] = "ABCDEFGH";
unsigned int iarray[2];
memcpy(iarray,array,8);
#define GET(x) (*(unsigned int *)((char *)iarray + (x)))
if(GET(0) != 0x41424344 && GET(0) != 0x44434241) return 1;
if(GET(1) != 0x42434445 && GET(1) != 0x45444342) return 1;
if(GET(2) != 0x43444546 && GET(2) != 0x46454443) return 1;
if(GET(3) != 0x44454647 && GET(3) != 0x47464544) return 1;
return 0;
}
], as_cv_unaligned_access="yes", as_cv_unaligned_access="no")
fi
AC_MSG_RESULT($as_cv_unaligned_access)
if test "$as_cv_unaligned_access" = "yes"; then
AC_DEFINE_UNQUOTED(HAVE_UNALIGNED_ACCESS, 1,
[defined if unaligned memory access works correctly])
fi
])
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