target/microblaze: Consider endianness while translating code

Consider the CPU ENDI bit, swap instructions when the CPU
endianness doesn't match the binary one.

Signed-off-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-Id: <20241105130431.22564-17-philmd@linaro.org>

target/microblaze/cpu.h

@@ -414,6 +414,13 @@ void mb_translate_code(CPUState *cs, TranslationBlock *tb,
 /* Ensure there is no overlap between the two masks. */
 QEMU_BUILD_BUG_ON(MSR_TB_MASK & IFLAGS_TB_MASK);
 
+static inline bool mb_cpu_is_big_endian(CPUState *cs)
+{
+    MicroBlazeCPU *cpu = MICROBLAZE_CPU(cs);
+
+    return !cpu->cfg.endi;
+}
+
 static inline void cpu_get_tb_cpu_state(CPUMBState *env, vaddr *pc,
                                         uint64_t *cs_base, uint32_t *flags)
 {

target/microblaze/translate.c

@@ -710,7 +710,7 @@ static void record_unaligned_ess(DisasContext *dc, int rd,
 
 static inline MemOp mo_endian(DisasContext *dc)
 {
-    return MO_TE;
+    return dc->cfg->endi ? MO_LE : MO_BE;
 }
 
 static bool do_load(DisasContext *dc, int rd, TCGv addr, MemOp mop,
@@ -1647,7 +1647,8 @@ static void mb_tr_translate_insn(DisasContextBase *dcb, CPUState *cs)
 
     dc->tb_flags_to_set = 0;
 
-    ir = translator_ldl(cpu_env(cs), &dc->base, dc->base.pc_next);
+    ir = translator_ldl_swap(cpu_env(cs), &dc->base, dc->base.pc_next,
+                             mb_cpu_is_big_endian(cs) != TARGET_BIG_ENDIAN);
     if (!decode(dc, ir)) {
         trap_illegal(dc, true);
     }