Hi,
the 16 bit bswap instruction support was missing in the back-end so
far. Added with the attached patch.
Bootstrapped on s390 and s390x. No regressions.
Bye,
-Andreas-
gcc/testsuite/ChangeLog:
2015-11-20 Andreas Krebbel <kreb...@linux.vnet.ibm.com>
* gcc.target/s390/bswap-1.c: New test.
gcc/ChangeLog:
2015-11-20 Andreas Krebbel <kreb...@linux.vnet.ibm.com>
* config/s390/s390.md ("bswaphi2"): New pattern.
diff --git a/gcc/config/s390/s390.md b/gcc/config/s390/s390.md
index ea65c74..280a772 100644
--- a/gcc/config/s390/s390.md
+++ b/gcc/config/s390/s390.md
@@ -10439,6 +10439,8 @@
; Byte swap instructions
;
+; FIXME: There is also mvcin but we cannot use it since src and target
+; may overlap.
(define_insn "bswap<mode>2"
[(set (match_operand:GPR 0 "register_operand" "=d, d")
(bswap:GPR (match_operand:GPR 1 "nonimmediate_operand" " d,RT")))]
@@ -10450,6 +10452,14 @@
(set_attr "op_type" "RRE,RXY")
(set_attr "z10prop" "z10_super")])
+(define_insn "bswaphi2"
+ [(set (match_operand:HI 0 "register_operand" "=d")
+ (bswap:HI (match_operand:HI 1 "memory_operand" "RT")))]
+ "TARGET_CPU_ZARCH"
+ "lrvh\t%0,%1"
+ [(set_attr "type" "load")
+ (set_attr "op_type" "RXY")
+ (set_attr "z10prop" "z10_super")])
;
; Population count instruction
diff --git a/gcc/testsuite/gcc.target/s390/bswap-1.c
b/gcc/testsuite/gcc.target/s390/bswap-1.c
new file mode 100644
index 0000000..e1f113a
--- /dev/null
+++ b/gcc/testsuite/gcc.target/s390/bswap-1.c
@@ -0,0 +1,36 @@
+/* { dg-do compile } */
+/* { dg-options "-O3 -march=z900 -mzarch" } */
+
+#include <stdint.h>
+
+uint64_t u64;
+uint32_t u32;
+uint16_t u16;
+
+uint64_t
+foo64a (uint64_t a)
+{
+ return __builtin_bswap64 (a);
+}
+/* { dg-final { scan-assembler-times "lrvgr\t%r2,%r2" 1 { target lp64 } } } */
+
+uint64_t
+foo64b ()
+{
+ return __builtin_bswap64 (u64);
+}
+/* { dg-final { scan-assembler-times "lrvg\t%r2,0\\(%r\[0-9\]*\\)" 1 { target
lp64 } } } */
+
+uint32_t
+foo32 ()
+{
+ return __builtin_bswap32 (u32);
+}
+/* { dg-final { scan-assembler-times "lrv\t%r2,0\\(%r\[0-9\]*\\)" 1 } } */
+
+uint16_t
+foo16 ()
+{
+ return __builtin_bswap16 (u16);
+}
+/* { dg-final { scan-assembler-times "lrvh\t%r2,0\\(%r\[0-9\]*\\)" 1 } } */
