target-alpha: Raise IOV from CVTTQ

Floating-point overflow is a different bit from integer overflow.

Reported-by: Al Viro <viro@ZenIV.linux.org.uk>
Signed-off-by: Richard Henderson <rth@twiddle.net>

1 files changed, 4 insertions, 13 deletions

diff --git a/target-alpha/translate.c b/target-alpha/translate.c
index f12132004a..7868cc45a7 100644
--- a/target-alpha/translate.c
+++ b/target-alpha/translate.c
@@ -760,23 +760,14 @@ static void gen_cvttq(DisasContext *ctx, int rb, int rc, int fn11)
     vb = gen_ieee_input(ctx, rb, fn11, 0);
     vc = dest_fpr(ctx, rc);
 
-    /* Almost all integer conversions use cropped rounding, and most
-       also do not have integer overflow enabled.  Special case that.  */
-    switch (fn11) {
-    case QUAL_RM_C:
+    /* Almost all integer conversions use cropped rounding;
+       special case that.  */
+    if ((fn11 & QUAL_RM_MASK) == QUAL_RM_C) {
         gen_helper_cvttq_c(vc, cpu_env, vb);
-        break;
-    case QUAL_V | QUAL_RM_C:
-    case QUAL_S | QUAL_V | QUAL_RM_C:
-    case QUAL_S | QUAL_V | QUAL_I | QUAL_RM_C:
-        gen_helper_cvttq_svic(vc, cpu_env, vb);
-        break;
-    default:
+    } else {
         gen_qual_roundmode(ctx, fn11);
         gen_helper_cvttq(vc, cpu_env, vb);
-        break;
     }
-
     gen_fp_exc_raise(rc, fn11);
 }