Comments
Patch
@@ -1,3 +1,3 @@
obj-$(CONFIG_SOFTMMU) += machine.o
obj-y += cpu.o excp.o intrpt.o mmu.o translate.o
-obj-y += excp_helper.o intrpt_helper.o mmu_helper.o
+obj-y += excp_helper.o int_helper.o intrpt_helper.o mmu_helper.o
@@ -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, tl, env, tl, tl)
+
/* interrupt */
DEF_HELPER_FLAGS_1(rfe, 0, void, env)
new file mode 100644
@@ -0,0 +1,85 @@
+/*
+ * 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 "excp.h"
+
+target_ulong HELPER(ff1)(target_ulong x)
+{
+ target_ulong n = 0;
+
+ if (x == 0) {
+ return 0;
+ }
+
+ for (n = 32; x; n--) {
+ x <<= 1;
+ }
+ return n+1;
+}
+
+target_ulong HELPER(fl1)(target_ulong x)
+{
+ target_ulong n = 0;
+
+ if (x == 0) {
+ return 0;
+ }
+
+ for (n = 0; x; n++) {
+ x >>= 1;
+ }
+ return n;
+}
+
+target_ulong HELPER(mul32)(CPUOpenRISCState *env,
+ target_ulong ra, target_ulong rb)
+{
+ uint64_t result;
+ target_ulong high, cy;
+
+ result = 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;
+ }
+ }
+
+ env->sr |= (SR_OV | SR_CY);
+ if (env->sr & SR_OVE) {
+ raise_exception(env, EXCP_RANGE);
+ }
+
+ return result;
+}
Add OpenRISC int instruction helpers. Signed-off-by: Jia Liu <proljc@gmail.com> --- target-openrisc/Makefile.objs | 2 +- target-openrisc/helper.h | 5 +++ target-openrisc/int_helper.c | 85 +++++++++++++++++++++++++++++++++++++++++ 3 files changed, 91 insertions(+), 1 deletion(-) create mode 100644 target-openrisc/int_helper.c