[PATCH 2/3] RTEMS: Fix MPC8540 multilibs for PowerPC

[Sebastian Huber]

GCC generates SPE instructions even if -msoft-float is specified.
Explicitly add -mno-spe to prevent generation of SPE instructions.  This
multilib variant must not lead to a usage of the SPE.

This patch should be applied to GCC 4.9 and mainline.  I do not have
write access, so in case this gets approved, please commit it for me.

gcc/ChangeLog
2014-12-15  Sebastian Huber  <sebastian.huber@embedded-brains.de>

	* config/rs6000/t-rtems: Add -mno-spe to soft-float multilib for
	MPC8540.
---
 gcc/config/rs6000/t-rtems | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/gcc/config/rs6000/t-rtems b/gcc/config/rs6000/t-rtems
index 3ebcfaa..e935947 100644
--- a/gcc/config/rs6000/t-rtems
+++ b/gcc/config/rs6000/t-rtems
@@ -30,6 +30,9 @@ MULTILIB_DIRNAMES += m403 m505 m603e m604 m860 m7400 m8540
 MULTILIB_OPTIONS += msoft-float/mfloat-gprs=double
 MULTILIB_DIRNAMES += nof gprsdouble
 
+MULTILIB_OPTIONS += mno-spe
+MULTILIB_DIRNAMES += nospe
+
 MULTILIB_MATCHES  	+= ${MULTILIB_MATCHES_ENDIAN}
 MULTILIB_MATCHES	+= ${MULTILIB_MATCHES_SYSV}
 # Map 405 to 403
@@ -66,6 +69,6 @@ MULTILIB_REQUIRED += mcpu=604/msoft-float
 MULTILIB_REQUIRED += mcpu=7400
 MULTILIB_REQUIRED += mcpu=7400/msoft-float
 MULTILIB_REQUIRED += mcpu=8540
-MULTILIB_REQUIRED += mcpu=8540/msoft-float
+MULTILIB_REQUIRED += mcpu=8540/msoft-float/mno-spe
 MULTILIB_REQUIRED += mcpu=8540/mfloat-gprs=double
 MULTILIB_REQUIRED += mcpu=860
-- 
1.8.4.5