target-ppc: Add ISA2.06 divde[o] Instructions

This patch adds the Divide Doubleword Extended instructions.
The implementation builds on the unsigned helper provided in
the previous patch.

Signed-off-by: Tom Musta <tommusta@gmail.com>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>

1 files changed, 23 insertions, 0 deletions

diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index 6f3d8fd805..920dba7891 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -65,6 +65,29 @@ uint64_t helper_divdeu(CPUPPCState *env, uint64_t ra, uint64_t rb, uint32_t oe)
     return rt;
 }
 
+uint64_t helper_divde(CPUPPCState *env, uint64_t rau, uint64_t rbu, uint32_t oe)
+{
+    int64_t rt = 0;
+    int64_t ra = (int64_t)rau;
+    int64_t rb = (int64_t)rbu;
+    int overflow = divs128(&rt, &ra, rb);
+
+    if (unlikely(overflow)) {
+        rt = 0; /* Undefined */
+    }
+
+    if (oe) {
+
+        if (unlikely(overflow)) {
+            env->so = env->ov = 1;
+        } else {
+            env->ov = 0;
+        }
+    }
+
+    return rt;
+}
+
 #endif