Instead of swapping the reversed target endianness
using MO_BSWAP, directly return the correct endianness.

Suggested-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
---
 target/mips/tcg/translate.h     | 5 +++++
 target/mips/tcg/mxu_translate.c | 8 ++++----
 2 files changed, 9 insertions(+), 4 deletions(-)

diff --git a/target/mips/tcg/translate.h b/target/mips/tcg/translate.h
index e81a8d5eb9b..c55f90e741b 100644
--- a/target/mips/tcg/translate.h
+++ b/target/mips/tcg/translate.h
@@ -240,4 +240,9 @@ static inline bool disas_is_bigendian(DisasContext *ctx)
     return extract32(ctx->CP0_Config0, CP0C0_BE, 1);
 }
 
+static inline MemOp mo_endian_rev(DisasContext *dc, bool reversed)
+{
+    return disas_is_bigendian(dc) ^ reversed ? MO_BE : MO_LE;
+}
+
 #endif
diff --git a/target/mips/tcg/mxu_translate.c b/target/mips/tcg/mxu_translate.c
index c517258ac5a..dd512ce7a48 100644
--- a/target/mips/tcg/mxu_translate.c
+++ b/target/mips/tcg/mxu_translate.c
@@ -1533,7 +1533,7 @@ static void gen_mxu_s32ldxx(DisasContext *ctx, bool reversed, bool postinc)
     tcg_gen_add_tl(t0, t0, t1);
 
     tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx,
-                       (MO_TESL ^ (reversed ? MO_BSWAP : 0)) |
+                       MO_SL | mo_endian_rev(ctx, reversed) |
                         ctx->default_tcg_memop_mask);
     gen_store_mxu_gpr(t1, XRa);
 
@@ -1569,7 +1569,7 @@ static void gen_mxu_s32stxx(DisasContext *ctx, bool reversed, bool postinc)
 
     gen_load_mxu_gpr(t1, XRa);
     tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx,
-                       (MO_TESL ^ (reversed ? MO_BSWAP : 0)) |
+                       MO_SL | mo_endian_rev(ctx, reversed) |
                         ctx->default_tcg_memop_mask);
 
     if (postinc) {
@@ -1605,7 +1605,7 @@ static void gen_mxu_s32ldxvx(DisasContext *ctx, bool reversed,
     tcg_gen_add_tl(t0, t0, t1);
 
     tcg_gen_qemu_ld_tl(t1, t0, ctx->mem_idx,
-                       (MO_TESL ^ (reversed ? MO_BSWAP : 0)) |
+                       MO_SL | mo_endian_rev(ctx, reversed) |
                         ctx->default_tcg_memop_mask);
     gen_store_mxu_gpr(t1, XRa);
 
@@ -1675,7 +1675,7 @@ static void gen_mxu_s32stxvx(DisasContext *ctx, bool reversed,
 
     gen_load_mxu_gpr(t1, XRa);
     tcg_gen_qemu_st_tl(t1, t0, ctx->mem_idx,
-                       (MO_TESL ^ (reversed ? MO_BSWAP : 0)) |
+                       MO_SL | mo_endian_rev(ctx, reversed) |
                         ctx->default_tcg_memop_mask);
 
     if (postinc) {
-- 
2.45.2

On 10/10/24 14:50, Philippe Mathieu-Daudé wrote:
> Instead of swapping the reversed target endianness
> using MO_BSWAP, directly return the correct endianness.
> 
> Suggested-by: Richard Henderson<richard.henderson@linaro.org>
> Signed-off-by: Philippe Mathieu-Daudé<philmd@linaro.org>
> ---
>   target/mips/tcg/translate.h     | 5 +++++
>   target/mips/tcg/mxu_translate.c | 8 ++++----
>   2 files changed, 9 insertions(+), 4 deletions(-)

Reviewed-by: Richard Henderson <richard.henderson@linaro.org>

r~