target-ppc: add vrldnmi and vrlwmi instructions

vrldmi: Vector Rotate Left Dword then Mask Insert
vrlwmi: Vector Rotate Left Word then Mask Insert

Signed-off-by: Gautham R. Shenoy <ego@linux.vnet.ibm.com>
Signed-off-by: Bharata B Rao <bharata@linux.vnet.ibm.com>
( use extract[32,64] and rol[32,64], introduce mask helpers in
  internal.h )
Signed-off-by: Nikunj A Dadhania <nikunj@linux.vnet.ibm.com>
Signed-off-by: David Gibson <david@gibson.dropbear.id.au>

1 files changed, 50 insertions, 0 deletions

diff --git a/target-ppc/internal.h b/target-ppc/internal.h
new file mode 100644
index 0000000000..1ff4896c45
--- /dev/null
+++ b/target-ppc/internal.h
@@ -0,0 +1,50 @@
+/*
+ *  PowerPC interal definitions for qemu.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2 of the License, or (at your option) any later version.
+ *
+ * This library is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, see <http://www.gnu.org/licenses/>.
+ */
+
+#ifndef PPC_INTERNAL_H
+#define PPC_INTERNAL_H
+
+#define FUNC_MASK(name, ret_type, size, max_val)                  \
+static inline ret_type name(uint##size##_t start,                 \
+                              uint##size##_t end)                 \
+{                                                                 \
+    ret_type ret, max_bit = size - 1;                             \
+                                                                  \
+    if (likely(start == 0)) {                                     \
+        ret = max_val << (max_bit - end);                         \
+    } else if (likely(end == max_bit)) {                          \
+        ret = max_val >> start;                                   \
+    } else {                                                      \
+        ret = (((uint##size##_t)(-1ULL)) >> (start)) ^            \
+            (((uint##size##_t)(-1ULL) >> (end)) >> 1);            \
+        if (unlikely(start > end)) {                              \
+            return ~ret;                                          \
+        }                                                         \
+    }                                                             \
+                                                                  \
+    return ret;                                                   \
+}
+
+#if defined(TARGET_PPC64)
+FUNC_MASK(MASK, target_ulong, 64, UINT64_MAX);
+#else
+FUNC_MASK(MASK, target_ulong, 32, UINT32_MAX);
+#endif
+FUNC_MASK(mask_u32, uint32_t, 32, UINT32_MAX);
+FUNC_MASK(mask_u64, uint64_t, 64, UINT64_MAX);
+
+#endif /* PPC_INTERNAL_H */