mirror of https://gitee.com/openkylin/qemu.git
368 lines
6.5 KiB
C
368 lines
6.5 KiB
C
/*
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* SH4 emulation
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*
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* Copyright (c) 2005 Samuel Tardieu
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#include <assert.h>
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#include "exec.h"
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void do_raise_exception(void)
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{
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cpu_loop_exit();
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}
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#ifndef CONFIG_USER_ONLY
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#define MMUSUFFIX _mmu
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#define GETPC() (__builtin_return_address(0))
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#define SHIFT 0
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#include "softmmu_template.h"
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#define SHIFT 1
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#include "softmmu_template.h"
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#define SHIFT 2
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#include "softmmu_template.h"
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#define SHIFT 3
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#include "softmmu_template.h"
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void tlb_fill(target_ulong addr, int is_write, int is_user, void *retaddr)
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{
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TranslationBlock *tb;
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CPUState *saved_env;
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unsigned long pc;
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int ret;
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/* XXX: hack to restore env in all cases, even if not called from
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generated code */
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saved_env = env;
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env = cpu_single_env;
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ret = cpu_sh4_handle_mmu_fault(env, addr, is_write, is_user, 1);
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if (ret) {
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if (retaddr) {
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/* now we have a real cpu fault */
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pc = (unsigned long) retaddr;
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tb = tb_find_pc(pc);
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if (tb) {
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/* the PC is inside the translated code. It means that we have
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a virtual CPU fault */
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cpu_restore_state(tb, env, pc, NULL);
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}
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}
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do_raise_exception();
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}
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env = saved_env;
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}
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#endif
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void helper_addc_T0_T1(void)
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{
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uint32_t tmp0, tmp1;
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tmp1 = T0 + T1;
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tmp0 = T1;
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T1 = tmp1 + (env->sr & 1);
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if (tmp0 > tmp1)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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if (tmp1 > T1)
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env->sr |= SR_T;
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}
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void helper_addv_T0_T1(void)
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{
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uint32_t dest, src, ans;
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if ((int32_t) T1 >= 0)
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dest = 0;
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else
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dest = 1;
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if ((int32_t) T0 >= 0)
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src = 0;
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else
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src = 1;
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src += dest;
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T1 += T0;
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if ((int32_t) T1 >= 0)
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ans = 0;
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else
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ans = 1;
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ans += dest;
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if (src == 0 || src == 2) {
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if (ans == 1)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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} else
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env->sr &= ~SR_T;
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}
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#define T (env->sr & SR_T)
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#define Q (env->sr & SR_Q ? 1 : 0)
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#define M (env->sr & SR_M ? 1 : 0)
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#define SETT env->sr |= SR_T
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#define CLRT env->sr &= ~SR_T
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#define SETQ env->sr |= SR_Q
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#define CLRQ env->sr &= ~SR_Q
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#define SETM env->sr |= SR_M
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#define CLRM env->sr &= ~SR_M
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void helper_div1_T0_T1(void)
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{
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uint32_t tmp0, tmp2;
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uint8_t old_q, tmp1 = 0xff;
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//printf("div1 T0=0x%08x T1=0x%08x M=%d Q=%d T=%d\n", T0, T1, M, Q, T);
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old_q = Q;
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if ((0x80000000 & T1) != 0)
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SETQ;
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else
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CLRQ;
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tmp2 = T0;
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T1 <<= 1;
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T1 |= T;
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switch (old_q) {
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case 0:
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switch (M) {
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case 0:
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tmp0 = T1;
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T1 -= tmp2;
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tmp1 = T1 > tmp0;
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switch (Q) {
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case 0:
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if (tmp1)
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SETQ;
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else
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CLRQ;
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break;
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case 1:
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if (tmp1 == 0)
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SETQ;
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else
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CLRQ;
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break;
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}
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break;
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case 1:
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tmp0 = T1;
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T1 += tmp2;
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tmp1 = T1 < tmp0;
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switch (Q) {
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case 0:
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if (tmp1 == 0)
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SETQ;
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else
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CLRQ;
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break;
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case 1:
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if (tmp1)
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SETQ;
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else
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CLRQ;
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break;
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}
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break;
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}
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break;
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case 1:
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switch (M) {
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case 0:
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tmp0 = T1;
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T1 += tmp2;
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tmp1 = T1 < tmp0;
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switch (Q) {
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case 0:
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if (tmp1)
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SETQ;
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else
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CLRQ;
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break;
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case 1:
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if (tmp1 == 0)
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SETQ;
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else
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CLRQ;
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break;
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}
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break;
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case 1:
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tmp0 = T1;
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T1 -= tmp2;
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tmp1 = T1 > tmp0;
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switch (Q) {
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case 0:
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if (tmp1 == 0)
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SETQ;
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else
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CLRQ;
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break;
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case 1:
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if (tmp1)
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SETQ;
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else
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CLRQ;
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break;
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}
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break;
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}
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break;
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}
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if (Q == M)
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SETT;
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else
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CLRT;
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//printf("Output: T1=0x%08x M=%d Q=%d T=%d\n", T1, M, Q, T);
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}
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void helper_dmulsl_T0_T1()
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{
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int64_t res;
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res = (int64_t) (int32_t) T0 *(int64_t) (int32_t) T1;
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env->mach = (res >> 32) & 0xffffffff;
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env->macl = res & 0xffffffff;
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}
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void helper_dmulul_T0_T1()
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{
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uint64_t res;
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res = (uint64_t) (uint32_t) T0 *(uint64_t) (uint32_t) T1;
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env->mach = (res >> 32) & 0xffffffff;
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env->macl = res & 0xffffffff;
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}
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void helper_macl_T0_T1()
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{
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int64_t res;
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res = ((uint64_t) env->mach << 32) | env->macl;
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res += (int64_t) (int32_t) T0 *(int64_t) (int32_t) T1;
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env->mach = (res >> 32) & 0xffffffff;
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env->macl = res & 0xffffffff;
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if (env->sr & SR_S) {
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if (res < 0)
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env->mach |= 0xffff0000;
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else
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env->mach &= 0x00007fff;
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}
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}
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void helper_macw_T0_T1()
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{
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int64_t res;
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res = ((uint64_t) env->mach << 32) | env->macl;
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res += (int64_t) (int16_t) T0 *(int64_t) (int16_t) T1;
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env->mach = (res >> 32) & 0xffffffff;
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env->macl = res & 0xffffffff;
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if (env->sr & SR_S) {
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if (res < -0x80000000) {
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env->mach = 1;
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env->macl = 0x80000000;
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} else if (res > 0x000000007fffffff) {
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env->mach = 1;
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env->macl = 0x7fffffff;
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}
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}
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}
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void helper_negc_T0()
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{
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uint32_t temp;
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temp = -T0;
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T0 = temp - (env->sr & SR_T);
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if (0 < temp)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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if (temp < T0)
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env->sr |= SR_T;
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}
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void helper_subc_T0_T1()
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{
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uint32_t tmp0, tmp1;
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tmp1 = T1 - T0;
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tmp0 = T1;
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T1 = tmp1 - (env->sr & SR_T);
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if (tmp0 < tmp1)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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if (tmp1 < T1)
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env->sr |= SR_T;
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}
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void helper_subv_T0_T1()
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{
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int32_t dest, src, ans;
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if ((int32_t) T1 >= 0)
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dest = 0;
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else
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dest = 1;
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if ((int32_t) T0 >= 0)
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src = 0;
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else
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src = 1;
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src += dest;
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T1 -= T0;
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if ((int32_t) T1 >= 0)
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ans = 0;
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else
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ans = 1;
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ans += dest;
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if (src == 1) {
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if (ans == 1)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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} else
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env->sr &= ~SR_T;
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}
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void helper_rotcl(uint32_t * addr)
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{
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uint32_t new;
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new = (*addr << 1) | (env->sr & SR_T);
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if (*addr & 0x80000000)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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*addr = new;
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}
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void helper_rotcr(uint32_t * addr)
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{
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uint32_t new;
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new = (*addr >> 1) | ((env->sr & SR_T) ? 0x80000000 : 0);
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if (*addr & 1)
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env->sr |= SR_T;
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else
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env->sr &= ~SR_T;
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*addr = new;
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}
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