Add moxie target code

Signed-off-by: Anthony Green <green@moxielogic.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>

10 files changed, 1531 insertions, 0 deletions

diff --git a/target-moxie/Makefile.objs b/target-moxie/Makefile.objs
new file mode 100644
index 0000000..6381d4d
--- /dev/null
+++ b/target-moxie/Makefile.objs
@@ -0,0 +1,2 @@
+obj-y += translate.o helper.o machine.o cpu.o machine.o
+obj-$(CONFIG_SOFTMMU) += mmu.o
diff --git a/target-moxie/cpu.c b/target-moxie/cpu.c
new file mode 100644
index 0000000..c17d3f0
--- /dev/null
+++ b/target-moxie/cpu.c
@@ -0,0 +1,172 @@
+/*
+ * QEMU Moxie CPU
+ *
+ * Copyright (c) 2013 Anthony Green
+ *
+ * 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 2.1 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include "cpu.h"
+#include "qemu-common.h"
+#include "migration/vmstate.h"
+#include "machine.h"
+
+static void moxie_cpu_reset(CPUState *s)
+{
+    MoxieCPU *cpu = MOXIE_CPU(s);
+    MoxieCPUClass *mcc = MOXIE_CPU_GET_CLASS(cpu);
+    CPUMoxieState *env = &cpu->env;
+
+    if (qemu_loglevel_mask(CPU_LOG_RESET)) {
+        qemu_log("CPU Reset (CPU %d)\n", s->cpu_index);
+        log_cpu_state(env, 0);
+    }
+
+    mcc->parent_reset(s);
+
+    memset(env, 0, offsetof(CPUMoxieState, breakpoints));
+    env->pc = 0x1000;
+
+    tlb_flush(env, 1);
+}
+
+static void moxie_cpu_realizefn(DeviceState *dev, Error **errp)
+{
+    MoxieCPU *cpu = MOXIE_CPU(dev);
+    MoxieCPUClass *occ = MOXIE_CPU_GET_CLASS(dev);
+
+    qemu_init_vcpu(&cpu->env);
+    cpu_reset(CPU(cpu));
+
+    occ->parent_realize(dev, errp);
+}
+
+static void moxie_cpu_initfn(Object *obj)
+{
+    CPUState *cs = CPU(obj);
+    MoxieCPU *cpu = MOXIE_CPU(obj);
+    static int inited;
+
+    cs->env_ptr = &cpu->env;
+    cpu_exec_init(&cpu->env);
+
+    if (tcg_enabled() && !inited) {
+        inited = 1;
+        moxie_translate_init();
+    }
+}
+
+static ObjectClass *moxie_cpu_class_by_name(const char *cpu_model)
+{
+    ObjectClass *oc;
+
+    if (cpu_model == NULL) {
+        return NULL;
+    }
+
+    oc = object_class_by_name(cpu_model);
+    if (oc != NULL && (!object_class_dynamic_cast(oc, TYPE_MOXIE_CPU) ||
+                       object_class_is_abstract(oc))) {
+        return NULL;
+    }
+    return oc;
+}
+
+static void moxie_cpu_class_init(ObjectClass *oc, void *data)
+{
+    DeviceClass *dc = DEVICE_CLASS(oc);
+    CPUClass *cc = CPU_CLASS(oc);
+    MoxieCPUClass *mcc = MOXIE_CPU_CLASS(oc);
+
+    mcc->parent_realize = dc->realize;
+    dc->realize = moxie_cpu_realizefn;
+
+    mcc->parent_reset = cc->reset;
+    cc->reset = moxie_cpu_reset;
+
+    cc->class_by_name = moxie_cpu_class_by_name;
+
+    dc->vmsd = &vmstate_moxie_cpu;
+}
+
+static void moxielite_initfn(Object *obj)
+{
+    /* Set cpu feature flags */
+}
+
+static void moxie_any_initfn(Object *obj)
+{
+    /* Set cpu feature flags */
+}
+
+typedef struct MoxieCPUInfo {
+    const char *name;
+    void (*initfn)(Object *obj);
+} MoxieCPUInfo;
+
+static const MoxieCPUInfo moxie_cpus[] = {
+    { .name = "MoxieLite",      .initfn = moxielite_initfn },
+    { .name = "any",            .initfn = moxie_any_initfn },
+};
+
+MoxieCPU *cpu_moxie_init(const char *cpu_model)
+{
+    MoxieCPU *cpu;
+    ObjectClass *oc;
+
+    oc = moxie_cpu_class_by_name(cpu_model);
+    if (oc == NULL) {
+        return NULL;
+    }
+    cpu = MOXIE_CPU(object_new(object_class_get_name(oc)));
+    cpu->env.cpu_model_str = cpu_model;
+
+    object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
+
+    return cpu;
+}
+
+static void cpu_register(const MoxieCPUInfo *info)
+{
+    TypeInfo type_info = {
+        .parent = TYPE_MOXIE_CPU,
+        .instance_size = sizeof(MoxieCPU),
+        .instance_init = info->initfn,
+        .class_size = sizeof(MoxieCPUClass),
+    };
+
+    type_info.name = g_strdup_printf("%s-" TYPE_MOXIE_CPU, info->name);
+    type_register(&type_info);
+    g_free((void *)type_info.name);
+}
+
+static const TypeInfo moxie_cpu_type_info = {
+    .name = TYPE_MOXIE_CPU,
+    .parent = TYPE_CPU,
+    .instance_size = sizeof(MoxieCPU),
+    .instance_init = moxie_cpu_initfn,
+    .class_size = sizeof(MoxieCPUClass),
+    .class_init = moxie_cpu_class_init,
+};
+
+static void moxie_cpu_register_types(void)
+{
+    int i;
+    type_register_static(&moxie_cpu_type_info);
+    for (i = 0; i < ARRAY_SIZE(moxie_cpus); i++) {
+        cpu_register(&moxie_cpus[i]);
+    }
+}
+
+type_init(moxie_cpu_register_types)
diff --git a/target-moxie/cpu.h b/target-moxie/cpu.h
new file mode 100644
index 0000000..b96236f
--- /dev/null
+++ b/target-moxie/cpu.h
@@ -0,0 +1,167 @@
+/*
+ *  Moxie emulation
+ *
+ *  Copyright (c) 2008, 2010, 2013 Anthony Green
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+#ifndef _CPU_MOXIE_H
+#define _CPU_MOXIE_H
+
+#include "config.h"
+#include "qemu-common.h"
+
+#define TARGET_LONG_BITS 32
+
+#define CPUArchState struct CPUMoxieState
+
+#define TARGET_HAS_ICE 1
+
+#define CPU_SAVE_VERSION 1
+
+#define ELF_MACHINE     0xFEED /* EM_MOXIE */
+
+#define MOXIE_EX_DIV0        0
+#define MOXIE_EX_BAD         1
+#define MOXIE_EX_IRQ         2
+#define MOXIE_EX_SWI         3
+#define MOXIE_EX_MMU_MISS    4
+#define MOXIE_EX_BREAK      16
+
+#include "exec/cpu-defs.h"
+#include "fpu/softfloat.h"
+
+#define TARGET_PAGE_BITS 12     /* 4k */
+
+#define TARGET_PHYS_ADDR_SPACE_BITS 32
+#define TARGET_VIRT_ADDR_SPACE_BITS 32
+
+#define NB_MMU_MODES 1
+
+typedef struct CPUMoxieState {
+
+    uint32_t flags;               /* general execution flags */
+    uint32_t gregs[16];           /* general registers */
+    uint32_t sregs[256];          /* special registers */
+    uint32_t pc;                  /* program counter */
+    /* Instead of saving the cc value, we save the cmp arguments
+       and compute cc on demand.  */
+    uint32_t cc_a;                /* reg a for condition code calculation */
+    uint32_t cc_b;                /* reg b for condition code calculation */
+
+    void *irq[8];
+
+    CPU_COMMON
+
+} CPUMoxieState;
+
+#include "qom/cpu.h"
+
+#define TYPE_MOXIE_CPU "moxie-cpu"
+
+#define MOXIE_CPU_CLASS(klass) \
+    OBJECT_CLASS_CHECK(MoxieCPUClass, (klass), TYPE_MOXIE_CPU)
+#define MOXIE_CPU(obj) \
+    OBJECT_CHECK(MoxieCPU, (obj), TYPE_MOXIE_CPU)
+#define MOXIE_CPU_GET_CLASS(obj) \
+    OBJECT_GET_CLASS(MoxieCPUClass, (obj), TYPE_MOXIE_CPU)
+
+/**
+ * MoxieCPUClass:
+ * @parent_reset: The parent class' reset handler.
+ *
+ * A Moxie CPU model.
+ */
+typedef struct MoxieCPUClass {
+    /*< private >*/
+    CPUClass parent_class;
+    /*< public >*/
+
+    DeviceRealize parent_realize;
+    void (*parent_reset)(CPUState *cpu);
+} MoxieCPUClass;
+
+/**
+ * MoxieCPU:
+ * @env: #CPUMoxieState
+ *
+ * A Moxie CPU.
+ */
+typedef struct MoxieCPU {
+    /*< private >*/
+    CPUState parent_obj;
+    /*< public >*/
+
+    CPUMoxieState env;
+} MoxieCPU;
+
+static inline MoxieCPU *moxie_env_get_cpu(CPUMoxieState *env)
+{
+    return MOXIE_CPU(container_of(env, MoxieCPU, env));
+}
+
+#define ENV_GET_CPU(e) CPU(moxie_env_get_cpu(e))
+
+#define ENV_OFFSET offsetof(MoxieCPU, env)
+
+MoxieCPU *cpu_moxie_init(const char *cpu_model);
+int cpu_moxie_exec(CPUMoxieState *s);
+void do_interrupt(CPUMoxieState *env);
+void moxie_translate_init(void);
+int cpu_moxie_signal_handler(int host_signum, void *pinfo,
+                             void *puc);
+
+static inline CPUMoxieState *cpu_init(const char *cpu_model)
+{
+    MoxieCPU *cpu = cpu_moxie_init(cpu_model);
+    if (cpu == NULL) {
+        return NULL;
+    }
+    return &cpu->env;
+}
+
+#define cpu_exec cpu_moxie_exec
+#define cpu_gen_code cpu_moxie_gen_code
+#define cpu_signal_handler cpu_moxie_signal_handler
+
+static inline int cpu_mmu_index(CPUMoxieState *env)
+{
+    return 0;
+}
+
+#include "exec/cpu-all.h"
+#include "exec/exec-all.h"
+
+static inline void cpu_pc_from_tb(CPUMoxieState *env, TranslationBlock *tb)
+{
+    env->pc = tb->pc;
+}
+
+static inline void cpu_get_tb_cpu_state(CPUMoxieState *env, target_ulong *pc,
+                                        target_ulong *cs_base, int *flags)
+{
+    *pc = env->pc;
+    *cs_base = 0;
+    *flags = 0;
+}
+
+static inline int cpu_has_work(CPUState *cpu)
+{
+    return cpu->interrupt_request & CPU_INTERRUPT_HARD;
+}
+
+int cpu_moxie_handle_mmu_fault(CPUMoxieState *env, target_ulong address,
+                               int rw, int mmu_idx);
+
+#endif /* _CPU_MOXIE_H */
diff --git a/target-moxie/helper.c b/target-moxie/helper.c
new file mode 100644
index 0000000..8604ce8
--- /dev/null
+++ b/target-moxie/helper.c
@@ -0,0 +1,171 @@
+/*
+ *  Moxie helper routines.
+ *
+ *  Copyright (c) 2008, 2009, 2010, 2013 Anthony Green
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <assert.h>
+
+#include "config.h"
+#include "cpu.h"
+#include "mmu.h"
+#include "exec/exec-all.h"
+#include "qemu/host-utils.h"
+#include "helper.h"
+
+#define MMUSUFFIX _mmu
+
+#define SHIFT 0
+#include "exec/softmmu_template.h"
+
+#define SHIFT 1
+#include "exec/softmmu_template.h"
+
+#define SHIFT 2
+#include "exec/softmmu_template.h"
+
+#define SHIFT 3
+#include "exec/softmmu_template.h"
+
+/* Try to fill the TLB and return an exception if error. If retaddr is
+   NULL, it means that the function was called in C code (i.e. not
+   from generated code or from helper.c) */
+void tlb_fill(CPUMoxieState *env, target_ulong addr, int is_write, int mmu_idx,
+              uintptr_t retaddr)
+{
+    int ret;
+
+    ret = cpu_moxie_handle_mmu_fault(env, addr, is_write, mmu_idx);
+    if (unlikely(ret)) {
+        if (retaddr) {
+            cpu_restore_state(env, retaddr);
+        }
+    }
+    cpu_loop_exit(env);
+}
+
+void helper_raise_exception(CPUMoxieState *env, int ex)
+{
+    env->exception_index = ex;
+    /* Stash the exception type.  */
+    env->sregs[2] = ex;
+    /* Stash the address where the exception occurred.  */
+    cpu_restore_state(env, GETPC());
+    env->sregs[5] = env->pc;
+    /* Jump the the exception handline routine.  */
+    env->pc = env->sregs[1];
+    cpu_loop_exit(env);
+}
+
+uint32_t helper_div(CPUMoxieState *env, uint32_t a, uint32_t b)
+{
+    if (unlikely(b == 0)) {
+        helper_raise_exception(env, MOXIE_EX_DIV0);
+        return 0;
+    }
+    if (unlikely(a == INT_MIN && b == -1)) {
+        return INT_MIN;
+    }
+
+    return (int32_t)a / (int32_t)b;
+}
+
+uint32_t helper_udiv(CPUMoxieState *env, uint32_t a, uint32_t b)
+{
+    if (unlikely(b == 0)) {
+        helper_raise_exception(env, MOXIE_EX_DIV0);
+        return 0;
+    }
+    return a / b;
+}
+
+void helper_debug(CPUMoxieState *env)
+{
+    env->exception_index = EXCP_DEBUG;
+    cpu_loop_exit(env);
+}
+
+#if defined(CONFIG_USER_ONLY)
+
+void do_interrupt(CPUState *env)
+{
+    env->exception_index = -1;
+}
+
+int cpu_moxie_handle_mmu_fault(CPUMoxieState *env, target_ulong address,
+                               int rw, int mmu_idx)
+{
+    env->exception_index = 0xaa;
+    env->debug1 = address;
+    cpu_dump_state(env, stderr, fprintf, 0);
+    return 1;
+}
+
+target_phys_addr_t cpu_get_phys_page_debug(CPUState *env, target_ulong addr)
+{
+    return addr;
+}
+
+#else /* !CONFIG_USER_ONLY */
+
+int cpu_moxie_handle_mmu_fault(CPUMoxieState *env, target_ulong address,
+                               int rw, int mmu_idx)
+{
+    MoxieMMUResult res;
+    int prot, miss;
+    target_ulong phy;
+    int r = 1;
+
+    address &= TARGET_PAGE_MASK;
+    prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+    miss = moxie_mmu_translate(&res, env, address, rw, mmu_idx);
+    if (miss) {
+        /* handle the miss.  */
+        phy = 0;
+        env->exception_index = MOXIE_EX_MMU_MISS;
+    } else {
+        phy = res.phy;
+        r = 0;
+    }
+    tlb_set_page(env, address, phy, prot, mmu_idx, TARGET_PAGE_SIZE);
+    return r;
+}
+
+
+void do_interrupt(CPUMoxieState *env)
+{
+    switch (env->exception_index) {
+    case MOXIE_EX_BREAK:
+        break;
+    default:
+        break;
+    }
+}
+
+hwaddr cpu_get_phys_page_debug(CPUMoxieState *env, target_ulong addr)
+{
+    uint32_t phy = addr;
+    MoxieMMUResult res;
+    int miss;
+    miss = moxie_mmu_translate(&res, env, addr, 0, 0);
+    if (!miss) {
+        phy = res.phy;
+    }
+    return phy;
+}
+#endif
diff --git a/target-moxie/helper.h b/target-moxie/helper.h
new file mode 100644
index 0000000..3aa5549
--- /dev/null
+++ b/target-moxie/helper.h
@@ -0,0 +1,9 @@
+#include "exec/def-helper.h"
+
+DEF_HELPER_2(raise_exception, void, env, int)
+DEF_HELPER_1(debug, void, env)
+
+DEF_HELPER_FLAGS_3(div, TCG_CALL_NO_WG, i32, env, i32, i32)
+DEF_HELPER_FLAGS_3(udiv, TCG_CALL_NO_WG, i32, env, i32, i32)
+
+#include "exec/def-helper.h"
diff --git a/target-moxie/machine.c b/target-moxie/machine.c
new file mode 100644
index 0000000..5bfdb28
--- /dev/null
+++ b/target-moxie/machine.c
@@ -0,0 +1,28 @@
+#include "hw/hw.h"
+#include "hw/boards.h"
+
+const VMStateDescription vmstate_moxie_cpu = {
+    .name = "cpu",
+    .version_id = CPU_SAVE_VERSION,
+    .minimum_version_id = 1,
+    .minimum_version_id_old = 1,
+    .fields      = (VMStateField[]) {
+        VMSTATE_UINT32(flags, CPUMoxieState),
+        VMSTATE_UINT32_ARRAY(gregs, CPUMoxieState, 16),
+        VMSTATE_UINT32_ARRAY(sregs, CPUMoxieState, 256),
+        VMSTATE_UINT32(pc, CPUMoxieState),
+        VMSTATE_UINT32(cc_a, CPUMoxieState),
+        VMSTATE_UINT32(cc_b, CPUMoxieState),
+        VMSTATE_END_OF_LIST()
+    }
+};
+
+void cpu_save(QEMUFile *f, void *opaque)
+{
+    vmstate_save_state(f, &vmstate_moxie_cpu, opaque);
+}
+
+int cpu_load(QEMUFile *f, void *opaque, int version_id)
+{
+    return vmstate_load_state(f, &vmstate_moxie_cpu, opaque, version_id);
+}
diff --git a/target-moxie/machine.h b/target-moxie/machine.h
new file mode 100644
index 0000000..a1b7290
--- /dev/null
+++ b/target-moxie/machine.h
@@ -0,0 +1 @@
+extern const VMStateDescription vmstate_moxie_cpu;
diff --git a/target-moxie/mmu.c b/target-moxie/mmu.c
new file mode 100644
index 0000000..5217eed
--- /dev/null
+++ b/target-moxie/mmu.c
@@ -0,0 +1,36 @@
+/*
+ *  Moxie mmu emulation.
+ *
+ *  Copyright (c) 2008, 2013 Anthony Green
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+
+#include "config.h"
+#include "cpu.h"
+#include "mmu.h"
+#include "exec/exec-all.h"
+
+int moxie_mmu_translate(MoxieMMUResult *res,
+                       CPUMoxieState *env, uint32_t vaddr,
+                       int rw, int mmu_idx)
+{
+    /* Perform no translation yet.  */
+    res->phy = vaddr;
+    return 0;
+}
diff --git a/target-moxie/mmu.h b/target-moxie/mmu.h
new file mode 100644
index 0000000..e01ffc2
--- /dev/null
+++ b/target-moxie/mmu.h
@@ -0,0 +1,19 @@
+#define MOXIE_MMU_ERR_EXEC  0
+#define MOXIE_MMU_ERR_READ  1
+#define MOXIE_MMU_ERR_WRITE 2
+#define MOXIE_MMU_ERR_FLUSH 3
+
+typedef struct {
+    uint32_t phy;
+    uint32_t pfn;
+    int g:1;
+    int v:1;
+    int k:1;
+    int w:1;
+    int e:1;
+    int cause_op;
+} MoxieMMUResult;
+
+int moxie_mmu_translate(MoxieMMUResult *res,
+                        CPUMoxieState *env, uint32_t vaddr,
+                        int rw, int mmu_idx);
diff --git a/target-moxie/translate.c b/target-moxie/translate.c
new file mode 100644
index 0000000..34f166e
--- /dev/null
+++ b/target-moxie/translate.c
@@ -0,0 +1,926 @@
+/*
+ *  Moxie emulation for qemu: main translation routines.
+ *
+ *  Copyright (c) 2009, 2013 Anthony Green
+ *
+ * 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 General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+/* For information on the Moxie architecture, see
+ *    http://moxielogic.org/wiki
+ */
+
+#include <stdarg.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <inttypes.h>
+#include <assert.h>
+
+#include "cpu.h"
+#include "exec/exec-all.h"
+#include "disas/disas.h"
+#include "tcg-op.h"
+
+#include "helper.h"
+#define GEN_HELPER 1
+#include "helper.h"
+
+/* This is the state at translation time.  */
+typedef struct DisasContext {
+    struct TranslationBlock *tb;
+    target_ulong pc, saved_pc;
+    uint32_t opcode;
+    uint32_t fp_status;
+    /* Routine used to access memory */
+    int memidx;
+    int bstate;
+    target_ulong btarget;
+    int singlestep_enabled;
+} DisasContext;
+
+enum {
+    BS_NONE     = 0, /* We go out of the TB without reaching a branch or an
+                      * exception condition */
+    BS_STOP     = 1, /* We want to stop translation for any reason */
+    BS_BRANCH   = 2, /* We reached a branch condition     */
+    BS_EXCP     = 3, /* We reached an exception condition */
+};
+
+static TCGv cpu_pc;
+static TCGv cpu_gregs[16];
+static TCGv_ptr cpu_env;
+static TCGv cc_a, cc_b;
+
+#include "exec/gen-icount.h"
+
+#define REG(x) (cpu_gregs[x])
+
+/* Extract the signed 10-bit offset from a 16-bit branch
+   instruction.  */
+static int extract_branch_offset(int opcode)
+{
+  return (((signed short)((opcode & ((1 << 10) - 1)) << 6)) >> 6) << 1;
+}
+
+void cpu_dump_state(CPUArchState *env, FILE *f, fprintf_function cpu_fprintf,
+                    int flags)
+{
+    int i;
+    cpu_fprintf(f, "pc=0x%08x\n", env->pc);
+    cpu_fprintf(f, "$fp=0x%08x $sp=0x%08x $r0=0x%08x $r1=0x%08x\n",
+                env->gregs[0], env->gregs[1], env->gregs[2], env->gregs[3]);
+    for (i = 4; i < 16; i += 4) {
+        cpu_fprintf(f, "$r%d=0x%08x $r%d=0x%08x $r%d=0x%08x $r%d=0x%08x\n",
+                    i-2, env->gregs[i], i-1, env->gregs[i + 1],
+                    i, env->gregs[i + 2], i+1, env->gregs[i + 3]);
+    }
+    for (i = 4; i < 16; i += 4) {
+        cpu_fprintf(f, "sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x sr%d=0x%08x\n",
+                    i-2, env->sregs[i], i-1, env->sregs[i + 1],
+                    i, env->sregs[i + 2], i+1, env->sregs[i + 3]);
+    }
+}
+
+void moxie_translate_init(void)
+{
+    int i;
+    static int done_init;
+    static const char * const gregnames[16] = {
+        "$fp", "$sp", "$r0", "$r1",
+        "$r2", "$r3", "$r4", "$r5",
+        "$r6", "$r7", "$r8", "$r9",
+        "$r10", "$r11", "$r12", "$r13"
+    };
+
+    if (done_init) {
+        return;
+    }
+    cpu_env = tcg_global_reg_new_ptr(TCG_AREG0, "env");
+    cpu_pc = tcg_global_mem_new_i32(TCG_AREG0,
+                                    offsetof(CPUMoxieState, pc), "$pc");
+    for (i = 0; i < 16; i++)
+        cpu_gregs[i] = tcg_global_mem_new_i32(TCG_AREG0,
+                                              offsetof(CPUMoxieState, gregs[i]),
+                                              gregnames[i]);
+
+    cc_a = tcg_global_mem_new_i32(TCG_AREG0,
+                                  offsetof(CPUMoxieState, cc_a), "cc_a");
+    cc_b = tcg_global_mem_new_i32(TCG_AREG0,
+                                  offsetof(CPUMoxieState, cc_b), "cc_b");
+
+    done_init = 1;
+}
+
+static inline void gen_goto_tb(CPUMoxieState *env, DisasContext *ctx,
+                               int n, target_ulong dest)
+{
+    TranslationBlock *tb;
+    tb = ctx->tb;
+
+    if ((tb->pc & TARGET_PAGE_MASK) == (dest & TARGET_PAGE_MASK) &&
+        !ctx->singlestep_enabled) {
+        tcg_gen_goto_tb(n);
+        tcg_gen_movi_i32(cpu_pc, dest);
+        tcg_gen_exit_tb((long) tb + n);
+    } else {
+        tcg_gen_movi_i32(cpu_pc, dest);
+        if (ctx->singlestep_enabled) {
+            gen_helper_debug(cpu_env);
+        }
+        tcg_gen_exit_tb(0);
+    }
+}
+
+static int decode_opc(MoxieCPU *cpu, DisasContext *ctx)
+{
+    CPUMoxieState *env = &cpu->env;
+
+    /* Local cache for the instruction opcode.  */
+    int opcode;
+    /* Set the default instruction length.  */
+    int length = 2;
+
+    if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP | CPU_LOG_TB_OP_OPT))) {
+        tcg_gen_debug_insn_start(ctx->pc);
+    }
+
+    /* Examine the 16-bit opcode.  */
+    opcode = ctx->opcode;
+
+    /* Decode instruction.  */
+    if (opcode & (1 << 15)) {
+        if (opcode & (1 << 14)) {
+            /* This is a Form 3 instruction.  */
+            int inst = (opcode >> 10 & 0xf);
+
+#define BRANCH(cond)                                                         \
+    do {                                                                     \
+        int l1 = gen_new_label();                                            \
+        tcg_gen_brcond_i32(cond, cc_a, cc_b, l1);                            \
+        gen_goto_tb(env, ctx, 1, ctx->pc+2);                                 \
+        gen_set_label(l1);                                                   \
+        gen_goto_tb(env, ctx, 0, extract_branch_offset(opcode) + ctx->pc+2); \
+        ctx->bstate = BS_BRANCH;                                             \
+    } while (0)
+
+            switch (inst) {
+            case 0x00: /* beq */
+                BRANCH(TCG_COND_EQ);
+                break;
+            case 0x01: /* bne */
+                BRANCH(TCG_COND_NE);
+                break;
+            case 0x02: /* blt */
+                BRANCH(TCG_COND_LT);
+                break;
+            case 0x03: /* bgt */
+                BRANCH(TCG_COND_GT);
+                break;
+            case 0x04: /* bltu */
+                BRANCH(TCG_COND_LTU);
+                break;
+            case 0x05: /* bgtu */
+                BRANCH(TCG_COND_GTU);
+                break;
+            case 0x06: /* bge */
+                BRANCH(TCG_COND_GE);
+                break;
+            case 0x07: /* ble */
+                BRANCH(TCG_COND_LE);
+                break;
+            case 0x08: /* bgeu */
+                BRANCH(TCG_COND_GEU);
+                break;
+            case 0x09: /* bleu */
+                BRANCH(TCG_COND_LEU);
+                break;
+            default:
+                {
+                    TCGv temp = tcg_temp_new_i32();
+                    tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                    tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
+                    gen_helper_raise_exception(cpu_env, temp);
+                    tcg_temp_free_i32(temp);
+                }
+                break;
+            }
+        } else {
+            /* This is a Form 2 instruction.  */
+            int inst = (opcode >> 12 & 0x3);
+            switch (inst) {
+            case 0x00: /* inc */
+                {
+                    int a = (opcode >> 8) & 0xf;
+                    unsigned int v = (opcode & 0xff);
+                    tcg_gen_addi_i32(REG(a), REG(a), v);
+                }
+                break;
+            case 0x01: /* dec */
+                {
+                    int a = (opcode >> 8) & 0xf;
+                    unsigned int v = (opcode & 0xff);
+                    tcg_gen_subi_i32(REG(a), REG(a), v);
+                }
+                break;
+            case 0x02: /* gsr */
+                {
+                    int a = (opcode >> 8) & 0xf;
+                    unsigned v = (opcode & 0xff);
+                    tcg_gen_ld_i32(REG(a), cpu_env,
+                                   offsetof(CPUMoxieState, sregs[v]));
+                }
+                break;
+            case 0x03: /* ssr */
+                {
+                    int a = (opcode >> 8) & 0xf;
+                    unsigned v = (opcode & 0xff);
+                    tcg_gen_st_i32(REG(a), cpu_env,
+                                   offsetof(CPUMoxieState, sregs[v]));
+                }
+                break;
+            default:
+                {
+                    TCGv temp = tcg_temp_new_i32();
+                    tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                    tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
+                    gen_helper_raise_exception(cpu_env, temp);
+                    tcg_temp_free_i32(temp);
+                }
+                break;
+            }
+        }
+    } else {
+        /* This is a Form 1 instruction.  */
+        int inst = opcode >> 8;
+        switch (inst) {
+        case 0x00: /* nop */
+            break;
+        case 0x01: /* ldi.l (immediate) */
+            {
+                int reg = (opcode >> 4) & 0xf;
+                int val = cpu_ldl_code(env, ctx->pc+2);
+                tcg_gen_movi_i32(REG(reg), val);
+                length = 6;
+            }
+            break;
+        case 0x02: /* mov (register-to-register) */
+            {
+                int dest  = (opcode >> 4) & 0xf;
+                int src = opcode & 0xf;
+                tcg_gen_mov_i32(REG(dest), REG(src));
+            }
+            break;
+        case 0x03: /* jsra */
+            {
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+
+                tcg_gen_movi_i32(t1, ctx->pc + 6);
+
+                /* Make space for the static chain and return address.  */
+                tcg_gen_subi_i32(t2, REG(1), 8);
+                tcg_gen_mov_i32(REG(1), t2);
+                tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
+
+                /* Push the current frame pointer.  */
+                tcg_gen_subi_i32(t2, REG(1), 4);
+                tcg_gen_mov_i32(REG(1), t2);
+                tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
+
+                /* Set the pc and $fp.  */
+                tcg_gen_mov_i32(REG(0), REG(1));
+
+                gen_goto_tb(env, ctx, 0, cpu_ldl_code(env, ctx->pc+2));
+
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                ctx->bstate = BS_BRANCH;
+                length = 6;
+            }
+            break;
+        case 0x04: /* ret */
+            {
+                TCGv t1 = tcg_temp_new_i32();
+
+                /* The new $sp is the old $fp.  */
+                tcg_gen_mov_i32(REG(1), REG(0));
+
+                /* Pop the frame pointer.  */
+                tcg_gen_qemu_ld32u(REG(0), REG(1), ctx->memidx);
+                tcg_gen_addi_i32(t1, REG(1), 4);
+                tcg_gen_mov_i32(REG(1), t1);
+
+
+                /* Pop the return address and skip over the static chain
+                   slot.  */
+                tcg_gen_qemu_ld32u(cpu_pc, REG(1), ctx->memidx);
+                tcg_gen_addi_i32(t1, REG(1), 8);
+                tcg_gen_mov_i32(REG(1), t1);
+
+                tcg_temp_free_i32(t1);
+
+                /* Jump... */
+                tcg_gen_exit_tb(0);
+
+                ctx->bstate = BS_BRANCH;
+            }
+            break;
+        case 0x05: /* add.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_add_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x06: /* push */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                tcg_gen_subi_i32(t1, REG(a), 4);
+                tcg_gen_mov_i32(REG(a), t1);
+                tcg_gen_qemu_st32(REG(b), REG(a), ctx->memidx);
+                tcg_temp_free_i32(t1);
+            }
+            break;
+        case 0x07: /* pop */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+                TCGv t1 = tcg_temp_new_i32();
+
+                tcg_gen_qemu_ld32u(REG(b), REG(a), ctx->memidx);
+                tcg_gen_addi_i32(t1, REG(a), 4);
+                tcg_gen_mov_i32(REG(a), t1);
+                tcg_temp_free_i32(t1);
+            }
+            break;
+        case 0x08: /* lda.l */
+            {
+                int reg = (opcode >> 4) & 0xf;
+
+                TCGv ptr = tcg_temp_new_i32();
+                tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_ld32u(REG(reg), ptr, ctx->memidx);
+                tcg_temp_free_i32(ptr);
+
+                length = 6;
+            }
+            break;
+        case 0x09: /* sta.l */
+            {
+                int val = (opcode >> 4) & 0xf;
+
+                TCGv ptr = tcg_temp_new_i32();
+                tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_st32(REG(val), ptr, ctx->memidx);
+                tcg_temp_free_i32(ptr);
+
+                length = 6;
+            }
+            break;
+        case 0x0a: /* ld.l (register indirect) */
+            {
+                int src  = opcode & 0xf;
+                int dest = (opcode >> 4) & 0xf;
+
+                tcg_gen_qemu_ld32u(REG(dest), REG(src), ctx->memidx);
+            }
+            break;
+        case 0x0b: /* st.l */
+            {
+                int dest = (opcode >> 4) & 0xf;
+                int val  = opcode & 0xf;
+
+                tcg_gen_qemu_st32(REG(val), REG(dest), ctx->memidx);
+            }
+            break;
+        case 0x0c: /* ldo.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+                tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_ld32u(t2, t1, ctx->memidx);
+                tcg_gen_mov_i32(REG(a), t2);
+
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                length = 6;
+            }
+            break;
+        case 0x0d: /* sto.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+                tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_st32(REG(b), t1, ctx->memidx);
+
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                length = 6;
+            }
+            break;
+        case 0x0e: /* cmp */
+            {
+                int a  = (opcode >> 4) & 0xf;
+                int b  = opcode & 0xf;
+
+                tcg_gen_mov_i32(cc_a, REG(a));
+                tcg_gen_mov_i32(cc_b, REG(b));
+            }
+            break;
+        case 0x19: /* jsr */
+            {
+                int fnreg = (opcode >> 4) & 0xf;
+
+                /* Load the stack pointer into T0.  */
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+
+                tcg_gen_movi_i32(t1, ctx->pc+2);
+
+                /* Make space for the static chain and return address.  */
+                tcg_gen_subi_i32(t2, REG(1), 8);
+                tcg_gen_mov_i32(REG(1), t2);
+                tcg_gen_qemu_st32(t1, REG(1), ctx->memidx);
+
+                /* Push the current frame pointer.  */
+                tcg_gen_subi_i32(t2, REG(1), 4);
+                tcg_gen_mov_i32(REG(1), t2);
+                tcg_gen_qemu_st32(REG(0), REG(1), ctx->memidx);
+
+                /* Set the pc and $fp.  */
+                tcg_gen_mov_i32(REG(0), REG(1));
+                tcg_gen_mov_i32(cpu_pc, REG(fnreg));
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+                tcg_gen_exit_tb(0);
+                ctx->bstate = BS_BRANCH;
+            }
+            break;
+        case 0x1a: /* jmpa */
+            {
+                tcg_gen_movi_i32(cpu_pc, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_exit_tb(0);
+                ctx->bstate = BS_BRANCH;
+                length = 6;
+            }
+            break;
+        case 0x1b: /* ldi.b (immediate) */
+            {
+                int reg = (opcode >> 4) & 0xf;
+                int val = cpu_ldl_code(env, ctx->pc+2);
+                tcg_gen_movi_i32(REG(reg), val);
+                length = 6;
+            }
+            break;
+        case 0x1c: /* ld.b (register indirect) */
+            {
+                int src  = opcode & 0xf;
+                int dest = (opcode >> 4) & 0xf;
+
+                tcg_gen_qemu_ld8u(REG(dest), REG(src), ctx->memidx);
+            }
+            break;
+        case 0x1d: /* lda.b */
+            {
+                int reg = (opcode >> 4) & 0xf;
+
+                TCGv ptr = tcg_temp_new_i32();
+                tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_ld8u(REG(reg), ptr, ctx->memidx);
+                tcg_temp_free_i32(ptr);
+
+                length = 6;
+            }
+            break;
+        case 0x1e: /* st.b */
+            {
+                int dest = (opcode >> 4) & 0xf;
+                int val  = opcode & 0xf;
+
+                tcg_gen_qemu_st8(REG(val), REG(dest), ctx->memidx);
+            }
+            break;
+        case 0x1f: /* sta.b */
+            {
+                int val = (opcode >> 4) & 0xf;
+
+                TCGv ptr = tcg_temp_new_i32();
+                tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_st8(REG(val), ptr, ctx->memidx);
+                tcg_temp_free_i32(ptr);
+
+                length = 6;
+            }
+            break;
+        case 0x20: /* ldi.s (immediate) */
+            {
+                int reg = (opcode >> 4) & 0xf;
+                int val = cpu_ldl_code(env, ctx->pc+2);
+                tcg_gen_movi_i32(REG(reg), val);
+                length = 6;
+            }
+            break;
+        case 0x21: /* ld.s (register indirect) */
+            {
+                int src  = opcode & 0xf;
+                int dest = (opcode >> 4) & 0xf;
+
+                tcg_gen_qemu_ld16u(REG(dest), REG(src), ctx->memidx);
+            }
+            break;
+        case 0x22: /* lda.s */
+            {
+                int reg = (opcode >> 4) & 0xf;
+
+                TCGv ptr = tcg_temp_new_i32();
+                tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_ld16u(REG(reg), ptr, ctx->memidx);
+                tcg_temp_free_i32(ptr);
+
+                length = 6;
+            }
+            break;
+        case 0x23: /* st.s */
+            {
+                int dest = (opcode >> 4) & 0xf;
+                int val  = opcode & 0xf;
+
+                tcg_gen_qemu_st16(REG(val), REG(dest), ctx->memidx);
+            }
+            break;
+        case 0x24: /* sta.s */
+            {
+                int val = (opcode >> 4) & 0xf;
+
+                TCGv ptr = tcg_temp_new_i32();
+                tcg_gen_movi_i32(ptr, cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_st16(REG(val), ptr, ctx->memidx);
+                tcg_temp_free_i32(ptr);
+
+                length = 6;
+            }
+            break;
+        case 0x25: /* jmp */
+            {
+                int reg = (opcode >> 4) & 0xf;
+                tcg_gen_mov_i32(cpu_pc, REG(reg));
+                tcg_gen_exit_tb(0);
+                ctx->bstate = BS_BRANCH;
+            }
+            break;
+        case 0x26: /* and */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_and_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x27: /* lshr */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv sv = tcg_temp_new_i32();
+                tcg_gen_andi_i32(sv, REG(b), 0x1f);
+                tcg_gen_shr_i32(REG(a), REG(a), sv);
+                tcg_temp_free_i32(sv);
+            }
+            break;
+        case 0x28: /* ashl */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv sv = tcg_temp_new_i32();
+                tcg_gen_andi_i32(sv, REG(b), 0x1f);
+                tcg_gen_shl_i32(REG(a), REG(a), sv);
+                tcg_temp_free_i32(sv);
+            }
+            break;
+        case 0x29: /* sub.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_sub_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x2a: /* neg */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_neg_i32(REG(a), REG(b));
+            }
+            break;
+        case 0x2b: /* or */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_or_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x2c: /* not */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_not_i32(REG(a), REG(b));
+            }
+            break;
+        case 0x2d: /* ashr */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv sv = tcg_temp_new_i32();
+                tcg_gen_andi_i32(sv, REG(b), 0x1f);
+                tcg_gen_sar_i32(REG(a), REG(a), sv);
+                tcg_temp_free_i32(sv);
+            }
+            break;
+        case 0x2e: /* xor */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_xor_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x2f: /* mul.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                tcg_gen_mul_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x30: /* swi */
+            {
+                int val = cpu_ldl_code(env, ctx->pc+2);
+
+                TCGv temp = tcg_temp_new_i32();
+                tcg_gen_movi_i32(temp, val);
+                tcg_gen_st_i32(temp, cpu_env,
+                               offsetof(CPUMoxieState, sregs[3]));
+                tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                tcg_gen_movi_i32(temp, MOXIE_EX_SWI);
+                gen_helper_raise_exception(cpu_env, temp);
+                tcg_temp_free_i32(temp);
+
+                length = 6;
+            }
+            break;
+        case 0x31: /* div.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+                tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                gen_helper_div(REG(a), cpu_env, REG(a), REG(b));
+            }
+            break;
+        case 0x32: /* udiv.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+                tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                gen_helper_udiv(REG(a), cpu_env, REG(a), REG(b));
+            }
+            break;
+        case 0x33: /* mod.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+                tcg_gen_rem_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x34: /* umod.l */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+                tcg_gen_remu_i32(REG(a), REG(a), REG(b));
+            }
+            break;
+        case 0x35: /* brk */
+            {
+                TCGv temp = tcg_temp_new_i32();
+                tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                tcg_gen_movi_i32(temp, MOXIE_EX_BREAK);
+                gen_helper_raise_exception(cpu_env, temp);
+                tcg_temp_free_i32(temp);
+            }
+            break;
+        case 0x36: /* ldo.b */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+                tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_ld8u(t2, t1, ctx->memidx);
+                tcg_gen_mov_i32(REG(a), t2);
+
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                length = 6;
+            }
+            break;
+        case 0x37: /* sto.b */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+                tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_st8(REG(b), t1, ctx->memidx);
+
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                length = 6;
+            }
+            break;
+        case 0x38: /* ldo.s */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+                tcg_gen_addi_i32(t1, REG(b), cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_ld16u(t2, t1, ctx->memidx);
+                tcg_gen_mov_i32(REG(a), t2);
+
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                length = 6;
+            }
+            break;
+        case 0x39: /* sto.s */
+            {
+                int a = (opcode >> 4) & 0xf;
+                int b = opcode & 0xf;
+
+                TCGv t1 = tcg_temp_new_i32();
+                TCGv t2 = tcg_temp_new_i32();
+                tcg_gen_addi_i32(t1, REG(a), cpu_ldl_code(env, ctx->pc+2));
+                tcg_gen_qemu_st16(REG(b), t1, ctx->memidx);
+                tcg_temp_free_i32(t1);
+                tcg_temp_free_i32(t2);
+
+                length = 6;
+            }
+            break;
+        default:
+            {
+                TCGv temp = tcg_temp_new_i32();
+                tcg_gen_movi_i32(cpu_pc, ctx->pc);
+                tcg_gen_movi_i32(temp, MOXIE_EX_BAD);
+                gen_helper_raise_exception(cpu_env, temp);
+                tcg_temp_free_i32(temp);
+             }
+            break;
+        }
+    }
+
+    return length;
+}
+
+/* generate intermediate code for basic block 'tb'.  */
+static void
+gen_intermediate_code_internal(MoxieCPU *cpu, TranslationBlock *tb,
+                               bool search_pc)
+{
+    DisasContext ctx;
+    target_ulong pc_start;
+    uint16_t *gen_opc_end;
+    CPUBreakpoint *bp;
+    int j, lj = -1;
+    CPUMoxieState *env = &cpu->env;
+    int num_insns;
+
+    pc_start = tb->pc;
+    gen_opc_end = tcg_ctx.gen_opc_buf + OPC_MAX_SIZE;
+    ctx.pc = pc_start;
+    ctx.saved_pc = -1;
+    ctx.tb = tb;
+    ctx.memidx = 0;
+    ctx.singlestep_enabled = 0;
+    ctx.bstate = BS_NONE;
+    num_insns = 0;
+
+    gen_tb_start();
+    do {
+        if (unlikely(!QTAILQ_EMPTY(&env->breakpoints))) {
+            QTAILQ_FOREACH(bp, &env->breakpoints, entry) {
+                if (ctx.pc == bp->pc) {
+                    tcg_gen_movi_i32(cpu_pc, ctx.pc);
+                    gen_helper_debug(cpu_env);
+                    ctx.bstate = BS_EXCP;
+                    goto done_generating;
+                }
+            }
+        }
+
+        if (search_pc) {
+            j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
+            if (lj < j) {
+                lj++;
+                while (lj < j) {
+                    tcg_ctx.gen_opc_instr_start[lj++] = 0;
+                }
+            }
+            tcg_ctx.gen_opc_pc[lj] = ctx.pc;
+            tcg_ctx.gen_opc_instr_start[lj] = 1;
+            tcg_ctx.gen_opc_icount[lj] = num_insns;
+        }
+        ctx.opcode = cpu_lduw_code(env, ctx.pc);
+        ctx.pc += decode_opc(cpu, &ctx);
+        num_insns++;
+
+        if (env->singlestep_enabled) {
+            break;
+        }
+
+        if ((ctx.pc & (TARGET_PAGE_SIZE - 1)) == 0) {
+            break;
+        }
+    } while (ctx.bstate == BS_NONE && tcg_ctx.gen_opc_ptr < gen_opc_end);
+
+    if (env->singlestep_enabled) {
+        tcg_gen_movi_tl(cpu_pc, ctx.pc);
+        gen_helper_debug(cpu_env);
+    } else {
+        switch (ctx.bstate) {
+        case BS_STOP:
+        case BS_NONE:
+            gen_goto_tb(env, &ctx, 0, ctx.pc);
+            break;
+        case BS_EXCP:
+            tcg_gen_exit_tb(0);
+            break;
+        case BS_BRANCH:
+        default:
+            break;
+        }
+    }
+ done_generating:
+    gen_tb_end(tb, num_insns);
+    *tcg_ctx.gen_opc_ptr = INDEX_op_end;
+    if (search_pc) {
+        j = tcg_ctx.gen_opc_ptr - tcg_ctx.gen_opc_buf;
+        lj++;
+        while (lj <= j) {
+            tcg_ctx.gen_opc_instr_start[lj++] = 0;
+        }
+    } else {
+        tb->size = ctx.pc - pc_start;
+        tb->icount = num_insns;
+    }
+}
+
+void gen_intermediate_code(CPUMoxieState *env, struct TranslationBlock *tb)
+{
+    gen_intermediate_code_internal(moxie_env_get_cpu(env), tb, false);
+}
+
+void gen_intermediate_code_pc(CPUMoxieState *env, struct TranslationBlock *tb)
+{
+    gen_intermediate_code_internal(moxie_env_get_cpu(env), tb, true);
+}
+
+void restore_state_to_opc(CPUMoxieState *env, TranslationBlock *tb, int pc_pos)
+{
+    env->pc = tcg_ctx.gen_opc_pc[pc_pos];
+}