target-mips: add msa_helper.c

add msa_helper.c
Reviewed-by: NJames Hogan <james.hogan@imgtec.com>
Reviewed-by: NLeon Alrae <leon.alrae@imgtec.com>
Signed-off-by: NYongbok Kim <yongbok.kim@imgtec.com>
Signed-off-by: NLeon Alrae <leon.alrae@imgtec.com>

target-mips/Makefile.objs

 obj-y += translate.o dsp_helper.o op_helper.o lmi_helper.o helper.o cpu.o
-obj-y += gdbstub.o
+obj-y += gdbstub.o msa_helper.o
 obj-$(CONFIG_SOFTMMU) += machine.o
 obj-$(CONFIG_KVM) += kvm.o

target-mips/msa_helper.c

+/*
+ * MIPS SIMD Architecture Module Instruction emulation helpers for QEMU.
+ *
+ * Copyright (c) 2014 Imagination Technologies
+ *
+ * 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/>.
+ */
+
+#include "cpu.h"
+#include "exec/helper-proto.h"
+
+/* Data format min and max values */
+#define DF_BITS(df) (1 << ((df) + 3))
+
+#define DF_MAX_INT(df)  (int64_t)((1LL << (DF_BITS(df) - 1)) - 1)
+#define M_MAX_INT(m)    (int64_t)((1LL << ((m)         - 1)) - 1)
+
+#define DF_MIN_INT(df)  (int64_t)(-(1LL << (DF_BITS(df) - 1)))
+#define M_MIN_INT(m)    (int64_t)(-(1LL << ((m)         - 1)))
+
+#define DF_MAX_UINT(df) (uint64_t)(-1ULL >> (64 - DF_BITS(df)))
+#define M_MAX_UINT(m)   (uint64_t)(-1ULL >> (64 - (m)))
+
+#define UNSIGNED(x, df) ((x) & DF_MAX_UINT(df))
+#define SIGNED(x, df)                                                   \
+    ((((int64_t)x) << (64 - DF_BITS(df))) >> (64 - DF_BITS(df)))
+
+/* Element-by-element access macros */
+#define DF_ELEMENTS(df) (MSA_WRLEN / DF_BITS(df))
+
+static inline void msa_move_v(wr_t *pwd, wr_t *pws)
+{
+    uint32_t i;
+
+    for (i = 0; i < DF_ELEMENTS(DF_DOUBLE); i++) {
+        pwd->d[i] = pws->d[i];
+    }
+}