* config/sparc/sparc.h (BRANCH_COST): Set the SPARC T4 branch
latency to 2.
---
gcc/config/sparc/sparc.h | 8 ++++++--
1 files changed, 6 insertions(+), 2 deletions(-)
diff --git a/gcc/config/sparc/sparc.h b/gcc/config/sparc/sparc.h
index 590a5f4..6277738 100644
--- a/gcc/config/sparc/sparc.h
+++ b/gcc/config/sparc/sparc.h
@@ -1566,7 +1566,9 @@ do {
\
and annulled branches insert 4 bubbles.
On Niagara-2 and Niagara-3, a not-taken branch costs 1 cycle whereas
- a taken branch costs 6 cycles. */
+ a taken branch costs 6 cycles.
+
+ The T4 Supplement specifies the branch latency at 2 cycles. */
#define BRANCH_COST(speed_p, predictable_p) \
((sparc_cpu == PROCESSOR_V9 \
@@ -1579,7 +1581,9 @@ do {
\
: ((sparc_cpu == PROCESSOR_NIAGARA2 \
|| sparc_cpu == PROCESSOR_NIAGARA3) \
? 5 \
- : 3))))
+ : (sparc_cpu == PROCESSOR_NIAGARA4 \
+ ? 2 \
+ : 3)))))
/* Control the assembler format that we output. */
--
1.7.1
