target-ppc: Add ISA2.06 bpermd Instruction

This patch adds the Bit Permute Doubleword (bpermd) instruction,
which was introduced in Power ISA 2.06 as part of the base 64-bit
architecture.

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, 20 insertions, 0 deletions

diff --git a/target-ppc/int_helper.c b/target-ppc/int_helper.c
index e50bdd20ec..0e7afb3dea 100644
--- a/target-ppc/int_helper.c
+++ b/target-ppc/int_helper.c
@@ -53,6 +53,26 @@ target_ulong helper_cntlzd(target_ulong t)
 }
 #endif
 
+#if defined(TARGET_PPC64)
+
+uint64_t helper_bpermd(uint64_t rs, uint64_t rb)
+{
+    int i;
+    uint64_t ra = 0;
+
+    for (i = 0; i < 8; i++) {
+        int index = (rs >> (i*8)) & 0xFF;
+        if (index < 64) {
+            if (rb & (1ull << (63-index))) {
+                ra |= 1 << i;
+            }
+        }
+    }
+    return ra;
+}
+
+#endif
+
 target_ulong helper_cmpb(target_ulong rs, target_ulong rb)
 {
     target_ulong mask = 0xff;