target/sh4: Add missing FPSCR.PR == 0 checks

Both frchg and fschg require PR == 0, otherwise undefined_operation.

Reviewed-by: Aurelien Jarno <aurelien@aurel32.net>
Signed-off-by: Richard Henderson <rth@twiddle.net>
Message-Id: <20170718200255.31647-26-rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>

diff --git a/target/sh4/translate.c b/target/sh4/translate.c
index 1ed0349..92a2c00 100644 (file)
--- a/target/sh4/translate.c
+++ b/target/sh4/translate.c
@@ -473,10 +473,12 @@ static void _decode_opc(DisasContext * ctx)
         tcg_gen_movi_i32(cpu_sr_t, 1);
        return;
     case 0xfbfd:               /* frchg */
+        CHECK_FPSCR_PR_0
        tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_FR);
        ctx->bstate = BS_STOP;
        return;
     case 0xf3fd:               /* fschg */
+        CHECK_FPSCR_PR_0
         tcg_gen_xori_i32(cpu_fpscr, cpu_fpscr, FPSCR_SZ);
        ctx->bstate = BS_STOP;
        return;