Build restriction wasn't good since it demands '-mips32r2'
in CFLAGS during configuration to enable DSPr2 optimizations.
Additional CFLAGS are not needed now and pixman could build
targeting the lowest common denominator.
Architecture and ISA are set in inline assembler
to allow compiler to build test code.
---
configure.ac | 8 ++------
1 files changed, 2 insertions(+), 6 deletions(-)
diff --git a/configure.ac b/configure.ac
index 0339494..7d62373 100644
--- a/configure.ac
+++ b/configure.ac
@@ -720,25 +720,21 @@ 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 $CFLAGS"
AC_COMPILE_IFELSE([AC_LANG_SOURCE([[
-#if !(defined(__mips__) && __mips_isa_rev >= 2)
-#error MIPS DSPr2 is currently only available on MIPS32r2 platforms.
-#endif
int
main ()
{
int c = 0, a = 0, b = 0;
__asm__ __volatile__ (
+ ".set arch=mips32r2 \n\t"
+ ".set dspr2 \n\t"
"precr.qb.ph %[c], %[a], %[b] \n\t"
: [c] "=r" (c)
: [a] "r" (a), [b] "r" (b)
);
return c;
}]])], have_mips_dspr2=yes)
-CFLAGS=$xserver_save_CFLAGS
AC_ARG_ENABLE(mips-dspr2,
[AC_HELP_STRING([--disable-mips-dspr2],
--
1.7.3
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