--- /dev/null
+/*
+ * m68k op helpers
+ *
+ * Copyright (c) 2006-2007 CodeSourcery
+ * Written by Paul Brook
+ *
+ * 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
+ * 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/gdbstub.h"
+
+#include "exec/helper-proto.h"
+
+#define SIGNBIT (1u << 31)
+
+/* Sort alphabetically, except for "any". */
+static gint m68k_cpu_list_compare(gconstpointer a, gconstpointer b)
+{
+ ObjectClass *class_a = (ObjectClass *)a;
+ ObjectClass *class_b = (ObjectClass *)b;
+ const char *name_a, *name_b;
+
+ name_a = object_class_get_name(class_a);
+ name_b = object_class_get_name(class_b);
+ if (strcmp(name_a, "any-" TYPE_M68K_CPU) == 0) {
+ return 1;
+ } else if (strcmp(name_b, "any-" TYPE_M68K_CPU) == 0) {
+ return -1;
+ } else {
+ return strcasecmp(name_a, name_b);
+ }
+}
+
+static void m68k_cpu_list_entry(gpointer data, gpointer user_data)
+{
+ ObjectClass *c = data;
+ CPUListState *s = user_data;
+ const char *typename;
+ char *name;
+
+ typename = object_class_get_name(c);
+ name = g_strndup(typename, strlen(typename) - strlen("-" TYPE_M68K_CPU));
+ (*s->cpu_fprintf)(s->file, "%s\n",
+ name);
+ g_free(name);
+}
+
+void m68k_cpu_list(FILE *f, fprintf_function cpu_fprintf)
+{
+ CPUListState s = {
+ .file = f,
+ .cpu_fprintf = cpu_fprintf,
+ };
+ GSList *list;
+
+ list = object_class_get_list(TYPE_M68K_CPU, false);
+ list = g_slist_sort(list, m68k_cpu_list_compare);
+ g_slist_foreach(list, m68k_cpu_list_entry, &s);
+ g_slist_free(list);
+}
+
+static int fpu_gdb_get_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
+{
+ if (n < 8) {
+ stfq_p(mem_buf, env->fregs[n]);
+ return 8;
+ }
+ if (n < 11) {
+ /* FP control registers (not implemented) */
+ memset(mem_buf, 0, 4);
+ return 4;
+ }
+ return 0;
+}
+
+static int fpu_gdb_set_reg(CPUM68KState *env, uint8_t *mem_buf, int n)
+{
+ if (n < 8) {
+ env->fregs[n] = ldfq_p(mem_buf);
+ return 8;
+ }
+ if (n < 11) {
+ /* FP control registers (not implemented) */
+ return 4;
+ }
+ return 0;
+}
+
+M68kCPU *cpu_m68k_init(const char *cpu_model)
+{
+ M68kCPU *cpu;
+ CPUM68KState *env;
+ ObjectClass *oc;
+
+ oc = cpu_class_by_name(TYPE_M68K_CPU, cpu_model);
+ if (oc == NULL) {
+ return NULL;
+ }
+ cpu = M68K_CPU(object_new(object_class_get_name(oc)));
+ env = &cpu->env;
+
+ register_m68k_insns(env);
+
+ object_property_set_bool(OBJECT(cpu), true, "realized", NULL);
+
+ return cpu;
+}
+
+void m68k_cpu_init_gdb(M68kCPU *cpu)
+{
+ CPUState *cs = CPU(cpu);
+ CPUM68KState *env = &cpu->env;
+
+ if (m68k_feature(env, M68K_FEATURE_CF_FPU)) {
+ gdb_register_coprocessor(cs, fpu_gdb_get_reg, fpu_gdb_set_reg,
+ 11, "cf-fp.xml", 18);
+ }
+ /* TODO: Add [E]MAC registers. */
+}
+
+void cpu_m68k_flush_flags(CPUM68KState *env, int cc_op)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+ int flags;
+ uint32_t src;
+ uint32_t dest;
+ uint32_t tmp;
+
+#define HIGHBIT 0x80000000u
+
+#define SET_NZ(x) do { \
+ if ((x) == 0) \
+ flags |= CCF_Z; \
+ else if ((int32_t)(x) < 0) \
+ flags |= CCF_N; \
+ } while (0)
+
+#define SET_FLAGS_SUB(type, utype) do { \
+ SET_NZ((type)dest); \
+ tmp = dest + src; \
+ if ((utype) tmp < (utype) src) \
+ flags |= CCF_C; \
+ if ((1u << (sizeof(type) * 8 - 1)) & (tmp ^ dest) & (tmp ^ src)) \
+ flags |= CCF_V; \
+ } while (0)
+
+ flags = 0;
+ src = env->cc_src;
+ dest = env->cc_dest;
+ switch (cc_op) {
+ case CC_OP_FLAGS:
+ flags = dest;
+ break;
+ case CC_OP_LOGIC:
+ SET_NZ(dest);
+ break;
+ case CC_OP_ADD:
+ SET_NZ(dest);
+ if (dest < src)
+ flags |= CCF_C;
+ tmp = dest - src;
+ if (HIGHBIT & (src ^ dest) & ~(tmp ^ src))
+ flags |= CCF_V;
+ break;
+ case CC_OP_SUB:
+ SET_FLAGS_SUB(int32_t, uint32_t);
+ break;
+ case CC_OP_CMPB:
+ SET_FLAGS_SUB(int8_t, uint8_t);
+ break;
+ case CC_OP_CMPW:
+ SET_FLAGS_SUB(int16_t, uint16_t);
+ break;
+ case CC_OP_ADDX:
+ SET_NZ(dest);
+ if (dest <= src)
+ flags |= CCF_C;
+ tmp = dest - src - 1;
+ if (HIGHBIT & (src ^ dest) & ~(tmp ^ src))
+ flags |= CCF_V;
+ break;
+ case CC_OP_SUBX:
+ SET_NZ(dest);
+ tmp = dest + src + 1;
+ if (tmp <= src)
+ flags |= CCF_C;
+ if (HIGHBIT & (tmp ^ dest) & (tmp ^ src))
+ flags |= CCF_V;
+ break;
+ case CC_OP_SHIFT:
+ SET_NZ(dest);
+ if (src)
+ flags |= CCF_C;
+ break;
+ default:
+ cpu_abort(CPU(cpu), "Bad CC_OP %d", cc_op);
+ }
+ env->cc_op = CC_OP_FLAGS;
+ env->cc_dest = flags;
+}
+
+void HELPER(movec)(CPUM68KState *env, uint32_t reg, uint32_t val)
+{
+ M68kCPU *cpu = m68k_env_get_cpu(env);
+
+ switch (reg) {
+ case 0x02: /* CACR */
+ env->cacr = val;
+ m68k_switch_sp(env);
+ break;
+ case 0x04: case 0x05: case 0x06: case 0x07: /* ACR[0-3] */
+ /* TODO: Implement Access Control Registers. */
+ break;
+ case 0x801: /* VBR */
+ env->vbr = val;
+ break;
+ /* TODO: Implement control registers. */
+ default:
+ cpu_abort(CPU(cpu), "Unimplemented control register write 0x%x = 0x%x\n",
+ reg, val);
+ }
+}
+
+void HELPER(set_macsr)(CPUM68KState *env, uint32_t val)
+{
+ uint32_t acc;
+ int8_t exthigh;
+ uint8_t extlow;
+ uint64_t regval;
+ int i;
+ if ((env->macsr ^ val) & (MACSR_FI | MACSR_SU)) {
+ for (i = 0; i < 4; i++) {
+ regval = env->macc[i];
+ exthigh = regval >> 40;
+ if (env->macsr & MACSR_FI) {
+ acc = regval >> 8;
+ extlow = regval;
+ } else {
+ acc = regval;
+ extlow = regval >> 32;
+ }
+ if (env->macsr & MACSR_FI) {
+ regval = (((uint64_t)acc) << 8) | extlow;
+ regval |= ((int64_t)exthigh) << 40;
+ } else if (env->macsr & MACSR_SU) {
+ regval = acc | (((int64_t)extlow) << 32);
+ regval |= ((int64_t)exthigh) << 40;
+ } else {
+ regval = acc | (((uint64_t)extlow) << 32);
+ regval |= ((uint64_t)(uint8_t)exthigh) << 40;
+ }
+ env->macc[i] = regval;
+ }
+ }
+ env->macsr = val;
+}
+
+void m68k_switch_sp(CPUM68KState *env)
+{
+ int new_sp;
+
+ env->sp[env->current_sp] = env->aregs[7];
+ new_sp = (env->sr & SR_S && env->cacr & M68K_CACR_EUSP)
+ ? M68K_SSP : M68K_USP;
+ env->aregs[7] = env->sp[new_sp];
+ env->current_sp = new_sp;
+}
+
+#if defined(CONFIG_USER_ONLY)
+
+int m68k_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
+ int mmu_idx)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+
+ cs->exception_index = EXCP_ACCESS;
+ cpu->env.mmu.ar = address;
+ return 1;
+}
+
+#else
+
+/* MMU */
+
+/* TODO: This will need fixing once the MMU is implemented. */
+hwaddr m68k_cpu_get_phys_page_debug(CPUState *cs, vaddr addr)
+{
+ return addr;
+}
+
+int m68k_cpu_handle_mmu_fault(CPUState *cs, vaddr address, int rw,
+ int mmu_idx)
+{
+ int prot;
+
+ address &= TARGET_PAGE_MASK;
+ prot = PAGE_READ | PAGE_WRITE | PAGE_EXEC;
+ tlb_set_page(cs, address, address, prot, mmu_idx, TARGET_PAGE_SIZE);
+ return 0;
+}
+
+/* Notify CPU of a pending interrupt. Prioritization and vectoring should
+ be handled by the interrupt controller. Real hardware only requests
+ the vector when the interrupt is acknowledged by the CPU. For
+ simplicitly we calculate it when the interrupt is signalled. */
+void m68k_set_irq_level(M68kCPU *cpu, int level, uint8_t vector)
+{
+ CPUState *cs = CPU(cpu);
+ CPUM68KState *env = &cpu->env;
+
+ env->pending_level = level;
+ env->pending_vector = vector;
+ if (level) {
+ cpu_interrupt(cs, CPU_INTERRUPT_HARD);
+ } else {
+ cpu_reset_interrupt(cs, CPU_INTERRUPT_HARD);
+ }
+}
+
+#endif
+
+uint32_t HELPER(bitrev)(uint32_t x)
+{
+ x = ((x >> 1) & 0x55555555u) | ((x << 1) & 0xaaaaaaaau);
+ x = ((x >> 2) & 0x33333333u) | ((x << 2) & 0xccccccccu);
+ x = ((x >> 4) & 0x0f0f0f0fu) | ((x << 4) & 0xf0f0f0f0u);
+ return bswap32(x);
+}
+
+uint32_t HELPER(ff1)(uint32_t x)
+{
+ int n;
+ for (n = 32; x; n--)
+ x >>= 1;
+ return n;
+}
+
+uint32_t HELPER(sats)(uint32_t val, uint32_t ccr)
+{
+ /* The result has the opposite sign to the original value. */
+ if (ccr & CCF_V)
+ val = (((int32_t)val) >> 31) ^ SIGNBIT;
+ return val;
+}
+
+uint32_t HELPER(subx_cc)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ uint32_t res;
+ uint32_t old_flags;
+
+ old_flags = env->cc_dest;
+ if (env->cc_x) {
+ env->cc_x = (op1 <= op2);
+ env->cc_op = CC_OP_SUBX;
+ res = op1 - (op2 + 1);
+ } else {
+ env->cc_x = (op1 < op2);
+ env->cc_op = CC_OP_SUB;
+ res = op1 - op2;
+ }
+ env->cc_dest = res;
+ env->cc_src = op2;
+ cpu_m68k_flush_flags(env, env->cc_op);
+ /* !Z is sticky. */
+ env->cc_dest &= (old_flags | ~CCF_Z);
+ return res;
+}
+
+uint32_t HELPER(addx_cc)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ uint32_t res;
+ uint32_t old_flags;
+
+ old_flags = env->cc_dest;
+ if (env->cc_x) {
+ res = op1 + op2 + 1;
+ env->cc_x = (res <= op2);
+ env->cc_op = CC_OP_ADDX;
+ } else {
+ res = op1 + op2;
+ env->cc_x = (res < op2);
+ env->cc_op = CC_OP_ADD;
+ }
+ env->cc_dest = res;
+ env->cc_src = op2;
+ cpu_m68k_flush_flags(env, env->cc_op);
+ /* !Z is sticky. */
+ env->cc_dest &= (old_flags | ~CCF_Z);
+ return res;
+}
+
+uint32_t HELPER(xflag_lt)(uint32_t a, uint32_t b)
+{
+ return a < b;
+}
+
+void HELPER(set_sr)(CPUM68KState *env, uint32_t val)
+{
+ env->sr = val & 0xffff;
+ m68k_switch_sp(env);
+}
+
+uint32_t HELPER(shl_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
+{
+ uint32_t result;
+ uint32_t cf;
+
+ shift &= 63;
+ if (shift == 0) {
+ result = val;
+ cf = env->cc_src & CCF_C;
+ } else if (shift < 32) {
+ result = val << shift;
+ cf = (val >> (32 - shift)) & 1;
+ } else if (shift == 32) {
+ result = 0;
+ cf = val & 1;
+ } else /* shift > 32 */ {
+ result = 0;
+ cf = 0;
+ }
+ env->cc_src = cf;
+ env->cc_x = (cf != 0);
+ env->cc_dest = result;
+ return result;
+}
+
+uint32_t HELPER(shr_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
+{
+ uint32_t result;
+ uint32_t cf;
+
+ shift &= 63;
+ if (shift == 0) {
+ result = val;
+ cf = env->cc_src & CCF_C;
+ } else if (shift < 32) {
+ result = val >> shift;
+ cf = (val >> (shift - 1)) & 1;
+ } else if (shift == 32) {
+ result = 0;
+ cf = val >> 31;
+ } else /* shift > 32 */ {
+ result = 0;
+ cf = 0;
+ }
+ env->cc_src = cf;
+ env->cc_x = (cf != 0);
+ env->cc_dest = result;
+ return result;
+}
+
+uint32_t HELPER(sar_cc)(CPUM68KState *env, uint32_t val, uint32_t shift)
+{
+ uint32_t result;
+ uint32_t cf;
+
+ shift &= 63;
+ if (shift == 0) {
+ result = val;
+ cf = (env->cc_src & CCF_C) != 0;
+ } else if (shift < 32) {
+ result = (int32_t)val >> shift;
+ cf = (val >> (shift - 1)) & 1;
+ } else /* shift >= 32 */ {
+ result = (int32_t)val >> 31;
+ cf = val >> 31;
+ }
+ env->cc_src = cf;
+ env->cc_x = cf;
+ env->cc_dest = result;
+ return result;
+}
+
+/* FPU helpers. */
+uint32_t HELPER(f64_to_i32)(CPUM68KState *env, float64 val)
+{
+ return float64_to_int32(val, &env->fp_status);
+}
+
+float32 HELPER(f64_to_f32)(CPUM68KState *env, float64 val)
+{
+ return float64_to_float32(val, &env->fp_status);
+}
+
+float64 HELPER(i32_to_f64)(CPUM68KState *env, uint32_t val)
+{
+ return int32_to_float64(val, &env->fp_status);
+}
+
+float64 HELPER(f32_to_f64)(CPUM68KState *env, float32 val)
+{
+ return float32_to_float64(val, &env->fp_status);
+}
+
+float64 HELPER(iround_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_round_to_int(val, &env->fp_status);
+}
+
+float64 HELPER(itrunc_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_trunc_to_int(val, &env->fp_status);
+}
+
+float64 HELPER(sqrt_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_sqrt(val, &env->fp_status);
+}
+
+float64 HELPER(abs_f64)(float64 val)
+{
+ return float64_abs(val);
+}
+
+float64 HELPER(chs_f64)(float64 val)
+{
+ return float64_chs(val);
+}
+
+float64 HELPER(add_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_add(a, b, &env->fp_status);
+}
+
+float64 HELPER(sub_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_sub(a, b, &env->fp_status);
+}
+
+float64 HELPER(mul_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_mul(a, b, &env->fp_status);
+}
+
+float64 HELPER(div_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ return float64_div(a, b, &env->fp_status);
+}
+
+float64 HELPER(sub_cmp_f64)(CPUM68KState *env, float64 a, float64 b)
+{
+ /* ??? This may incorrectly raise exceptions. */
+ /* ??? Should flush denormals to zero. */
+ float64 res;
+ res = float64_sub(a, b, &env->fp_status);
+ if (float64_is_quiet_nan(res)) {
+ /* +/-inf compares equal against itself, but sub returns nan. */
+ if (!float64_is_quiet_nan(a)
+ && !float64_is_quiet_nan(b)) {
+ res = float64_zero;
+ if (float64_lt_quiet(a, res, &env->fp_status))
+ res = float64_chs(res);
+ }
+ }
+ return res;
+}
+
+uint32_t HELPER(compare_f64)(CPUM68KState *env, float64 val)
+{
+ return float64_compare_quiet(val, float64_zero, &env->fp_status);
+}
+
+/* MAC unit. */
+/* FIXME: The MAC unit implementation is a bit of a mess. Some helpers
+ take values, others take register numbers and manipulate the contents
+ in-place. */
+void HELPER(mac_move)(CPUM68KState *env, uint32_t dest, uint32_t src)
+{
+ uint32_t mask;
+ env->macc[dest] = env->macc[src];
+ mask = MACSR_PAV0 << dest;
+ if (env->macsr & (MACSR_PAV0 << src))
+ env->macsr |= mask;
+ else
+ env->macsr &= ~mask;
+}
+
+uint64_t HELPER(macmuls)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ int64_t product;
+ int64_t res;
+
+ product = (uint64_t)op1 * op2;
+ res = (product << 24) >> 24;
+ if (res != product) {
+ env->macsr |= MACSR_V;
+ if (env->macsr & MACSR_OMC) {
+ /* Make sure the accumulate operation overflows. */
+ if (product < 0)
+ res = ~(1ll << 50);
+ else
+ res = 1ll << 50;
+ }
+ }
+ return res;
+}
+
+uint64_t HELPER(macmulu)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ uint64_t product;
+
+ product = (uint64_t)op1 * op2;
+ if (product & (0xffffffull << 40)) {
+ env->macsr |= MACSR_V;
+ if (env->macsr & MACSR_OMC) {
+ /* Make sure the accumulate operation overflows. */
+ product = 1ll << 50;
+ } else {
+ product &= ((1ull << 40) - 1);
+ }
+ }
+ return product;
+}
+
+uint64_t HELPER(macmulf)(CPUM68KState *env, uint32_t op1, uint32_t op2)
+{
+ uint64_t product;
+ uint32_t remainder;
+
+ product = (uint64_t)op1 * op2;
+ if (env->macsr & MACSR_RT) {
+ remainder = product & 0xffffff;
+ product >>= 24;
+ if (remainder > 0x800000)
+ product++;
+ else if (remainder == 0x800000)
+ product += (product & 1);
+ } else {
+ product >>= 24;
+ }
+ return product;
+}
+
+void HELPER(macsats)(CPUM68KState *env, uint32_t acc)
+{
+ int64_t tmp;
+ int64_t result;
+ tmp = env->macc[acc];
+ result = ((tmp << 16) >> 16);
+ if (result != tmp) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_V) {
+ env->macsr |= MACSR_PAV0 << acc;
+ if (env->macsr & MACSR_OMC) {
+ /* The result is saturated to 32 bits, despite overflow occurring
+ at 48 bits. Seems weird, but that's what the hardware docs
+ say. */
+ result = (result >> 63) ^ 0x7fffffff;
+ }
+ }
+ env->macc[acc] = result;
+}
+
+void HELPER(macsatu)(CPUM68KState *env, uint32_t acc)
+{
+ uint64_t val;
+
+ val = env->macc[acc];
+ if (val & (0xffffull << 48)) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_V) {
+ env->macsr |= MACSR_PAV0 << acc;
+ if (env->macsr & MACSR_OMC) {
+ if (val > (1ull << 53))
+ val = 0;
+ else
+ val = (1ull << 48) - 1;
+ } else {
+ val &= ((1ull << 48) - 1);
+ }
+ }
+ env->macc[acc] = val;
+}
+
+void HELPER(macsatf)(CPUM68KState *env, uint32_t acc)
+{
+ int64_t sum;
+ int64_t result;
+
+ sum = env->macc[acc];
+ result = (sum << 16) >> 16;
+ if (result != sum) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_V) {
+ env->macsr |= MACSR_PAV0 << acc;
+ if (env->macsr & MACSR_OMC) {
+ result = (result >> 63) ^ 0x7fffffffffffll;
+ }
+ }
+ env->macc[acc] = result;
+}
+
+void HELPER(mac_set_flags)(CPUM68KState *env, uint32_t acc)
+{
+ uint64_t val;
+ val = env->macc[acc];
+ if (val == 0) {
+ env->macsr |= MACSR_Z;
+ } else if (val & (1ull << 47)) {
+ env->macsr |= MACSR_N;
+ }
+ if (env->macsr & (MACSR_PAV0 << acc)) {
+ env->macsr |= MACSR_V;
+ }
+ if (env->macsr & MACSR_FI) {
+ val = ((int64_t)val) >> 40;
+ if (val != 0 && val != -1)
+ env->macsr |= MACSR_EV;
+ } else if (env->macsr & MACSR_SU) {
+ val = ((int64_t)val) >> 32;
+ if (val != 0 && val != -1)
+ env->macsr |= MACSR_EV;
+ } else {
+ if ((val >> 32) != 0)
+ env->macsr |= MACSR_EV;
+ }
+}
+
+void HELPER(flush_flags)(CPUM68KState *env, uint32_t cc_op)
+{
+ cpu_m68k_flush_flags(env, cc_op);
+}
+
+uint32_t HELPER(get_macf)(CPUM68KState *env, uint64_t val)
+{
+ int rem;
+ uint32_t result;
+
+ if (env->macsr & MACSR_SU) {
+ /* 16-bit rounding. */
+ rem = val & 0xffffff;
+ val = (val >> 24) & 0xffffu;
+ if (rem > 0x800000)
+ val++;
+ else if (rem == 0x800000)
+ val += (val & 1);
+ } else if (env->macsr & MACSR_RT) {
+ /* 32-bit rounding. */
+ rem = val & 0xff;
+ val >>= 8;
+ if (rem > 0x80)
+ val++;
+ else if (rem == 0x80)
+ val += (val & 1);
+ } else {
+ /* No rounding. */
+ val >>= 8;
+ }
+ if (env->macsr & MACSR_OMC) {
+ /* Saturate. */
+ if (env->macsr & MACSR_SU) {
+ if (val != (uint16_t) val) {
+ result = ((val >> 63) ^ 0x7fff) & 0xffff;
+ } else {
+ result = val & 0xffff;
+ }
+ } else {
+ if (val != (uint32_t)val) {
+ result = ((uint32_t)(val >> 63) & 0x7fffffff);
+ } else {
+ result = (uint32_t)val;
+ }
+ }
+ } else {
+ /* No saturation. */
+ if (env->macsr & MACSR_SU) {
+ result = val & 0xffff;
+ } else {
+ result = (uint32_t)val;
+ }
+ }
+ return result;
+}
+
+uint32_t HELPER(get_macs)(uint64_t val)
+{
+ if (val == (int32_t)val) {
+ return (int32_t)val;
+ } else {
+ return (val >> 61) ^ ~SIGNBIT;
+ }
+}
+
+uint32_t HELPER(get_macu)(uint64_t val)
+{
+ if ((val >> 32) == 0) {
+ return (uint32_t)val;
+ } else {
+ return 0xffffffffu;
+ }
+}
+
+uint32_t HELPER(get_mac_extf)(CPUM68KState *env, uint32_t acc)
+{
+ uint32_t val;
+ val = env->macc[acc] & 0x00ff;
+ val = (env->macc[acc] >> 32) & 0xff00;
+ val |= (env->macc[acc + 1] << 16) & 0x00ff0000;
+ val |= (env->macc[acc + 1] >> 16) & 0xff000000;
+ return val;
+}
+
+uint32_t HELPER(get_mac_exti)(CPUM68KState *env, uint32_t acc)
+{
+ uint32_t val;
+ val = (env->macc[acc] >> 32) & 0xffff;
+ val |= (env->macc[acc + 1] >> 16) & 0xffff0000;
+ return val;
+}
+
+void HELPER(set_mac_extf)(CPUM68KState *env, uint32_t val, uint32_t acc)
+{
+ int64_t res;
+ int32_t tmp;
+ res = env->macc[acc] & 0xffffffff00ull;
+ tmp = (int16_t)(val & 0xff00);
+ res |= ((int64_t)tmp) << 32;
+ res |= val & 0xff;
+ env->macc[acc] = res;
+ res = env->macc[acc + 1] & 0xffffffff00ull;
+ tmp = (val & 0xff000000);
+ res |= ((int64_t)tmp) << 16;
+ res |= (val >> 16) & 0xff;
+ env->macc[acc + 1] = res;
+}
+
+void HELPER(set_mac_exts)(CPUM68KState *env, uint32_t val, uint32_t acc)
+{
+ int64_t res;
+ int32_t tmp;
+ res = (uint32_t)env->macc[acc];
+ tmp = (int16_t)val;
+ res |= ((int64_t)tmp) << 32;
+ env->macc[acc] = res;
+ res = (uint32_t)env->macc[acc + 1];
+ tmp = val & 0xffff0000;
+ res |= (int64_t)tmp << 16;
+ env->macc[acc + 1] = res;
+}
+
+void HELPER(set_mac_extu)(CPUM68KState *env, uint32_t val, uint32_t acc)
+{
+ uint64_t res;
+ res = (uint32_t)env->macc[acc];
+ res |= ((uint64_t)(val & 0xffff)) << 32;
+ env->macc[acc] = res;
+ res = (uint32_t)env->macc[acc + 1];
+ res |= (uint64_t)(val & 0xffff0000) << 16;
+ env->macc[acc + 1] = res;
+}
+
+void m68k_cpu_exec_enter(CPUState *cs)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+
+ env->cc_op = CC_OP_FLAGS;
+ env->cc_dest = env->sr & 0xf;
+ env->cc_x = (env->sr >> 4) & 1;
+}
+
+void m68k_cpu_exec_exit(CPUState *cs)
+{
+ M68kCPU *cpu = M68K_CPU(cs);
+ CPUM68KState *env = &cpu->env;
+
+ cpu_m68k_flush_flags(env, env->cc_op);
+ env->cc_op = CC_OP_FLAGS;
+ env->sr = (env->sr & 0xffe0) | env->cc_dest | (env->cc_x << 4);
+}
Code Review / kvmfornfv.git / blobdiff