Revert "Disable MMX when Clang is being used."

[profile/ivi/pixman.git] / configure.ac

diff --git a/configure.ac b/configure.ac
index 233d3dc..c3c711c 100644 (file)
--- a/configure.ac
+++ b/configure.ac
@@ -54,7 +54,7 @@ AC_PREREQ([2.57])
 
 m4_define([pixman_major], 0)
 m4_define([pixman_minor], 25)
-m4_define([pixman_micro], 1)
+m4_define([pixman_micro], 3)
 
 m4_define([pixman_version],[pixman_major.pixman_minor.pixman_micro])
 
@@ -259,14 +259,14 @@ PIXMAN_CHECK_CFLAG([-fvisibility=hidden], [dnl
 #error Have -fvisibility but it is ignored and generates a warning
 #endif
 #else
-error Need GCC 4.0 for visibility
+#error Need GCC 4.0 for visibility
 #endif
 ])
 
 PIXMAN_CHECK_CFLAG([-xldscope=hidden], [dnl
 #if defined(__SUNPRO_C) && (__SUNPRO_C >= 0x550)
 #else
-error Need Sun Studio 8 for visibility
+#error Need Sun Studio 8 for visibility
 #endif
 ])
 
@@ -292,7 +292,7 @@ xserver_save_CFLAGS=$CFLAGS
 CFLAGS="$MMX_CFLAGS $CFLAGS"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
-error "Need GCC >= 3.4 for MMX intrinsics"
+#error "Need GCC >= 3.4 for MMX intrinsics"
 #endif
 #include <mmintrin.h>
 int main () {
@@ -407,6 +407,7 @@ case $host_os in
       ;;
 esac
 
+AC_SUBST(IWMMXT_CFLAGS)
 AC_SUBST(MMX_CFLAGS)
 AC_SUBST(MMX_LDFLAGS)
 AC_SUBST(SSE2_CFLAGS)
@@ -426,7 +427,7 @@ xserver_save_CFLAGS=$CFLAGS
 CFLAGS="$VMX_CFLAGS $CFLAGS"
 AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
 #if defined(__GNUC__) && (__GNUC__ < 3 || (__GNUC__ == 3 && __GNUC_MINOR__ < 4))
-error "Need GCC >= 3.4 for sane altivec support"
+#error "Need GCC >= 3.4 for sane altivec support"
 #endif
 #include <altivec.h>
 int main () {
@@ -591,6 +592,51 @@ fi
 
 AM_CONDITIONAL(USE_ARM_IWMMXT, test $have_iwmmxt_intrinsics = yes)
 
+dnl ==========================================================================
+dnl Check if assembler is gas compatible and supports MIPS DSPr2 instructions
+
+have_mips_dspr2=no
+AC_MSG_CHECKING(whether to use MIPS DSPr2 assembler)
+xserver_save_CFLAGS=$CFLAGS
+CFLAGS="-mdspr2 $CFLAGS"
+
+AC_COMPILE_IFELSE([[
+#if !(defined(__mips__) &&  __mips_isa_rev >= 2)
+#error MIPS DSPr2 is currently only available on MIPS32r2 platforms.
+#endif
+int
+main ()
+{
+    int c = 0, a = 0, b = 0;
+    __asm__ __volatile__ (
+        "precr.qb.ph %[c], %[a], %[b]          \n\t"
+        : [c] "=r" (c)
+        : [a] "r" (a), [b] "r" (b)
+    );
+    return c;
+}]], have_mips_dspr2=yes)
+CFLAGS=$xserver_save_CFLAGS
+
+AC_ARG_ENABLE(mips-dspr2,
+   [AC_HELP_STRING([--disable-mips-dspr2],
+                   [disable MIPS DSPr2 fast paths])],
+   [enable_mips_dspr2=$enableval], [enable_mips_dspr2=auto])
+
+if test $enable_mips_dspr2 = no ; then
+   have_mips_dspr2=disabled
+fi
+
+if test $have_mips_dspr2 = yes ; then
+   AC_DEFINE(USE_MIPS_DSPR2, 1, [use MIPS DSPr2 assembly optimizations])
+fi
+
+AM_CONDITIONAL(USE_MIPS_DSPR2, test $have_mips_dspr2 = yes)
+
+AC_MSG_RESULT($have_mips_dspr2)
+if test $enable_mips_dspr2 = yes && test $have_mips_dspr2 = no ; then
+   AC_MSG_ERROR([MIPS DSPr2 instructions not detected])
+fi
+
 dnl =========================================================================================
 dnl Check for GNU-style inline assembly support