target/mips: Fix handling of unaligned memory access for nanoMIPS ISA

nanoMIPS ISA does not support unaligned memory access. Adjust
DisasContext's default_tcg_memop_mask to reflect this.

Signed-off-by: Dragan Mladjenovic <dragan.mladjenovic@syrmia.com>
Signed-off-by: Stefan Pejic <stefan.pejic@syrmia.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20220504110403.613168-6-stefan.pejic@syrmia.com>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>

diff --git a/target/mips/tcg/translate.c b/target/mips/tcg/translate.c
index 6de5b66650a011221b9a81b35ca54f0d8365402a..5f460fb687e50e1b2296af9bb32260454ad6beee 100644 (file)
--- a/target/mips/tcg/translate.c
+++ b/target/mips/tcg/translate.c
@@ -16023,8 +16023,9 @@ static void mips_tr_init_disas_context(DisasContextBase *dcbase, CPUState *cs)
 #else
         ctx->mem_idx = hflags_mmu_index(ctx->hflags);
 #endif
-    ctx->default_tcg_memop_mask = (ctx->insn_flags & (ISA_MIPS_R6 |
-                                  INSN_LOONGSON3A)) ? MO_UNALN : MO_ALIGN;
+    ctx->default_tcg_memop_mask = (!(ctx->insn_flags & ISA_NANOMIPS32) &&
+                                  (ctx->insn_flags & (ISA_MIPS_R6 |
+                                  INSN_LOONGSON3A))) ? MO_UNALN : MO_ALIGN;
 
     /*
      * Execute a branch and its delay slot as a single instruction.