target/sh4: Tidy misc illegal insn checks

Now that we have a do_illegal label, use goto in order
to self-document the forcing of the exception.

Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-22-rth@twiddle.net>
[aurel32: fix whitespace issues]
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index b907197..b16df1e 100644 (file)
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -1068,8 +1068,9 @@ static void _decode_opc(DisasContext * ctx)
             if (ctx->tbflags & FPSCR_PR) {
                 TCGv_i64 fp0, fp1;
 
-               if (ctx->opcode & 0x0110)
-                   break; /* illegal instruction */
+                if (ctx->opcode & 0x0110) {
+                    goto do_illegal;
+                }
                fp0 = tcg_temp_new_i64();
                fp1 = tcg_temp_new_i64();
                 gen_load_fpr64(ctx, fp0, B11_8);
@@ -1131,7 +1132,7 @@ static void _decode_opc(DisasContext * ctx)
         {
             CHECK_FPU_ENABLED
             if (ctx->tbflags & FPSCR_PR) {
-                break; /* illegal instruction */
+                goto do_illegal;
             } else {
                 gen_helper_fmac_FT(FREG(B11_8), cpu_env,
                                    FREG(0), FREG(B7_4), FREG(B11_8));
@@ -1669,8 +1670,9 @@ static void _decode_opc(DisasContext * ctx)
        CHECK_FPU_ENABLED
         if (ctx->tbflags & FPSCR_PR) {
            TCGv_i64 fp;
-           if (ctx->opcode & 0x0100)
-               break; /* illegal instruction */
+            if (ctx->opcode & 0x0100) {
+                goto do_illegal;
+            }
            fp = tcg_temp_new_i64();
             gen_helper_float_DT(fp, cpu_env, cpu_fpul);
             gen_store_fpr64(ctx, fp, B11_8);
@@ -1684,8 +1686,9 @@ static void _decode_opc(DisasContext * ctx)
        CHECK_FPU_ENABLED
         if (ctx->tbflags & FPSCR_PR) {
            TCGv_i64 fp;
-           if (ctx->opcode & 0x0100)
-               break; /* illegal instruction */
+            if (ctx->opcode & 0x0100) {
+                goto do_illegal;
+            }
            fp = tcg_temp_new_i64();
             gen_load_fpr64(ctx, fp, B11_8);
             gen_helper_ftrc_DT(cpu_fpul, cpu_env, fp);
@@ -1706,8 +1709,9 @@ static void _decode_opc(DisasContext * ctx)
     case 0xf06d: /* fsqrt FRn */
        CHECK_FPU_ENABLED
         if (ctx->tbflags & FPSCR_PR) {
-           if (ctx->opcode & 0x0100)
-               break; /* illegal instruction */
+            if (ctx->opcode & 0x0100) {
+                goto do_illegal;
+            }
            TCGv_i64 fp = tcg_temp_new_i64();
             gen_load_fpr64(ctx, fp, B11_8);
             gen_helper_fsqrt_DT(fp, cpu_env, fp);