[PATCH 12/14] target/s390x: Use op_ld for LOAD REVERSED

Richard Henderson <[email protected]> Fri, 31 Jul 2026 11:56:25 -0700
Newsgroups org.nongnu.qemu-devel
Message-ID <[email protected]>
Use the MemOp parameter to op_ld to directly perform a
little-endian load, rather than a separate byte reverse
after the load.

Signed-off-by: Richard Henderson <[email protected]>
---
 target/s390x/tcg/translate.c     | 7 -------
 target/s390x/tcg/insn-data.h.inc | 6 +++---
 2 files changed, 3 insertions(+), 10 deletions(-)

diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 61793a9e80..7c1961567d 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -5760,13 +5760,6 @@ static void in2_m2_16s(DisasContext *s, DisasOps *o)
 }
 #define SPEC_in2_m2_16s 0
 
-static void in2_m2_16u(DisasContext *s, DisasOps *o)
-{
-    in2_a2(s, o);
-    tcg_gen_qemu_ld_i64(o->in2, o->in2, get_mem_index(s), MO_BEUW);
-}
-#define SPEC_in2_m2_16u 0
-
 static void in2_m2_32s(DisasContext *s, DisasOps *o)
 {
     in2_a2(s, o);
diff --git a/target/s390x/tcg/insn-data.h.inc b/target/s390x/tcg/insn-data.h.inc
index 3611da1ef3..691f8222ab 100644
--- a/target/s390x/tcg/insn-data.h.inc
+++ b/target/s390x/tcg/insn-data.h.inc
@@ -590,9 +590,9 @@
 /* LOAD REVERSED */
     C(0xb91f, LRVR,    RRE,   Z,   0, r2_32u, new, r1_32, rev32, 0)
     C(0xb90f, LRVGR,   RRE,   Z,   0, r2_o, r1, 0, rev64, 0)
-    C(0xe31f, LRVH,    RXY_a, Z,   0, m2_16u, new, r1_16, rev16, 0)
-    C(0xe31e, LRV,     RXY_a, Z,   0, m2_32u, new, r1_32, rev32, 0)
-    C(0xe30f, LRVG,    RXY_a, Z,   0, m2_64, r1, 0, rev64, 0)
+    D(0xe31f, LRVH,    RXY_a, Z,   0, a2, new, r1_16, ld, 0, MO_LEUW)
+    D(0xe31e, LRV,     RXY_a, Z,   0, a2, new, r1_32, ld, 0, MO_LEUL)
+    D(0xe30f, LRVG,    RXY_a, Z,   0, a2, r1, 0, ld, 0, MO_LEUQ)
 /* LOAD ZERO */
     F(0xb374, LZER,    RRE,   Z,   0, 0, 0, e1, zero, 0, IF_AFP1)
     F(0xb375, LZDR,    RRE,   Z,   0, 0, 0, f1, zero, 0, IF_AFP1)
-- 
2.43.0