[Xen-ia64-devel] [PATCH 02/32] ia64/pv_ops: update native/inst.h to clobber predicate.

[Isaku Yamahata <yamahata@xxxxxxxxxxxxx>]

add CLOBBER_PRED() to clobber predicate register.

Signed-off-by: Isaku Yamahata <yamahata@xxxxxxxxxxxxx>
---
 arch/ia64/include/asm/native/inst.h |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)

diff --git a/arch/ia64/include/asm/native/inst.h 
b/arch/ia64/include/asm/native/inst.h
index c8efbf7..0a1026c 100644
--- a/arch/ia64/include/asm/native/inst.h
+++ b/arch/ia64/include/asm/native/inst.h
@@ -36,8 +36,13 @@
        ;;                                      \
        movl clob = PARAVIRT_POISON;            \
        ;;
+# define CLOBBER_PRED(pred_clob)               \
+       ;;                                      \
+       cmp.eq pred_clob, p0 = r0, r0           \
+       ;;
 #else
-# define CLOBBER(clob)         /* nothing */
+# define CLOBBER(clob)                 /* nothing */
+# define CLOBBER_PRED(pred_clob)       /* nothing */
 #endif
 
 #define MOV_FROM_IFA(reg)      \
@@ -136,7 +141,8 @@
 
 #define SSM_PSR_I(pred, pred_clob, clob)       \
 (pred) ssm psr.i                               \
-       CLOBBER(clob)
+       CLOBBER(clob)                           \
+       CLOBBER_PRED(pred_clob)
 
 #define RSM_PSR_I(pred, clob0, clob1)  \
 (pred) rsm psr.i                       \
-- 
1.6.0.2


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