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authorJia Liu <proljc@gmail.com>2012-07-20 15:50:43 +0800
committerBlue Swirl <blauwirbel@gmail.com>2012-07-27 21:12:59 +0000
commite54a5aff1305bd538ba320c4b637e0c89029337e (patch)
treeccb6b23090af705ab09c62eb1a4ebde1c2ebe0fb
parent1d7d4034690a4dd292b214a788298a2cacd09fb2 (diff)
downloadqemu-arm-e54a5aff1305bd538ba320c4b637e0c89029337e.tar.gz
target-or32: Add int instruction helpers
Add OpenRISC int instruction helpers. Signed-off-by: Jia Liu <proljc@gmail.com> Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
-rw-r--r--target-openrisc/Makefile.objs2
-rw-r--r--target-openrisc/helper.h5
-rw-r--r--target-openrisc/int_helper.c79
3 files changed, 85 insertions, 1 deletions
diff --git a/target-openrisc/Makefile.objs b/target-openrisc/Makefile.objs
index 52d0158c61..e2a3715f74 100644
--- a/target-openrisc/Makefile.objs
+++ b/target-openrisc/Makefile.objs
@@ -1,3 +1,3 @@
obj-$(CONFIG_SOFTMMU) += machine.o
obj-y += cpu.o exception.o interrupt.o mmu.o translate.o
-obj-y += exception_helper.o interrupt_helper.o mmu_helper.o
+obj-y += exception_helper.o int_helper.o interrupt_helper.o mmu_helper.o
diff --git a/target-openrisc/helper.h b/target-openrisc/helper.h
index 43b23caca8..b4128ac3f6 100644
--- a/target-openrisc/helper.h
+++ b/target-openrisc/helper.h
@@ -22,6 +22,11 @@
/* exception */
DEF_HELPER_FLAGS_2(exception, 0, void, env, i32)
+/* int */
+DEF_HELPER_FLAGS_1(ff1, 0, tl, tl)
+DEF_HELPER_FLAGS_1(fl1, 0, tl, tl)
+DEF_HELPER_FLAGS_3(mul32, 0, i32, env, i32, i32)
+
/* interrupt */
DEF_HELPER_FLAGS_1(rfe, 0, void, env)
diff --git a/target-openrisc/int_helper.c b/target-openrisc/int_helper.c
new file mode 100644
index 0000000000..2fdfd27712
--- /dev/null
+++ b/target-openrisc/int_helper.c
@@ -0,0 +1,79 @@
+/*
+ * OpenRISC int helper routines
+ *
+ * Copyright (c) 2011-2012 Jia Liu <proljc@gmail.com>
+ * Feng Gao <gf91597@gmail.com>
+ *
+ * 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 "helper.h"
+#include "exception.h"
+#include "host-utils.h"
+
+target_ulong HELPER(ff1)(target_ulong x)
+{
+/*#ifdef TARGET_OPENRISC64
+ return x ? ctz64(x) + 1 : 0;
+#else*/
+ return x ? ctz32(x) + 1 : 0;
+/*#endif*/
+}
+
+target_ulong HELPER(fl1)(target_ulong x)
+{
+/* not used yet, open it when we need or64. */
+/*#ifdef TARGET_OPENRISC64
+ return 64 - clz64(x);
+#else*/
+ return 32 - clz32(x);
+/*#endif*/
+}
+
+uint32_t HELPER(mul32)(CPUOpenRISCState *env,
+ uint32_t ra, uint32_t rb)
+{
+ uint64_t result;
+ uint32_t high, cy;
+
+ OpenRISCCPU *cpu = OPENRISC_CPU(ENV_GET_CPU(env));
+
+ result = (uint64_t)ra * rb;
+ /* regisiers in or32 is 32bit, so 32 is NOT a magic number.
+ or64 is not handled in this function, and not implement yet,
+ TARGET_LONG_BITS for or64 is 64, it will break this function,
+ so, we didn't use TARGET_LONG_BITS here. */
+ high = result >> 32;
+ cy = result >> (32 - 1);
+
+ if ((cy & 0x1) == 0x0) {
+ if (high == 0x0) {
+ return result;
+ }
+ }
+
+ if ((cy & 0x1) == 0x1) {
+ if (high == 0xffffffff) {
+ return result;
+ }
+ }
+
+ cpu->env.sr |= (SR_OV | SR_CY);
+ if (cpu->env.sr & SR_OVE) {
+ raise_exception(cpu, EXCP_RANGE);
+ }
+
+ return result;
+}