root / target-m68k / op.c @ 0633879f
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/*
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* m68k micro operations
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*
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* Copyright (c) 2006-2007 CodeSourcery
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* Written by Paul Brook
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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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* 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 "exec.h" |
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#include "m68k-qreg.h" |
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|
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#ifndef offsetof
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#define offsetof(type, field) ((size_t) &((type *)0)->field) |
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#endif
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|
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static long qreg_offsets[] = { |
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#define DEFO32(name, offset) offsetof(CPUState, offset),
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#define DEFR(name, reg, mode) -1, |
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#define DEFF64(name, offset) offsetof(CPUState, offset),
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0,
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#include "qregs.def" |
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}; |
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|
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#define CPU_FP_STATUS env->fp_status
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|
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#define RAISE_EXCEPTION(n) do { \ |
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env->exception_index = n; \ |
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cpu_loop_exit(); \ |
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} while(0) |
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|
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#define get_op helper_get_op
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#define set_op helper_set_op
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#define get_opf64 helper_get_opf64
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#define set_opf64 helper_set_opf64
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uint32_t |
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get_op(int qreg)
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{
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if (qreg == QREG_T0) {
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return T0;
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} else if (qreg < TARGET_NUM_QREGS) { |
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return *(uint32_t *)(((long)env) + qreg_offsets[qreg]); |
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} else {
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return env->qregs[qreg - TARGET_NUM_QREGS];
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} |
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} |
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|
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void set_op(int qreg, uint32_t val) |
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{
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if (qreg == QREG_T0) {
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T0 = val; |
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} else if (qreg < TARGET_NUM_QREGS) { |
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*(uint32_t *)(((long)env) + qreg_offsets[qreg]) = val;
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} else {
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env->qregs[qreg - TARGET_NUM_QREGS] = val; |
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} |
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} |
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|
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float64 get_opf64(int qreg)
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{
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if (qreg < TARGET_NUM_QREGS) {
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return *(float64 *)(((long)env) + qreg_offsets[qreg]); |
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} else {
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return *(float64 *)&env->qregs[qreg - TARGET_NUM_QREGS];
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} |
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} |
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|
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void set_opf64(int qreg, float64 val) |
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{
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if (qreg < TARGET_NUM_QREGS) {
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*(float64 *)(((long)env) + qreg_offsets[qreg]) = val;
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} else {
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*(float64 *)&env->qregs[qreg - TARGET_NUM_QREGS] = val; |
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} |
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} |
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|
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#define OP(name) void OPPROTO glue(op_,name) (void) |
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|
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OP(mov32) |
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{
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set_op(PARAM1, get_op(PARAM2)); |
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FORCE_RET(); |
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} |
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|
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OP(mov32_im) |
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{
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set_op(PARAM1, PARAM2); |
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FORCE_RET(); |
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} |
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|
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OP(movf64) |
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{
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set_opf64(PARAM1, get_opf64(PARAM2)); |
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FORCE_RET(); |
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} |
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|
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OP(zerof64) |
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{
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set_opf64(PARAM1, 0);
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FORCE_RET(); |
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} |
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|
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OP(add32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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set_op(PARAM1, op2 + op3); |
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FORCE_RET(); |
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} |
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|
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OP(sub32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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set_op(PARAM1, op2 - op3); |
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FORCE_RET(); |
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} |
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|
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OP(mul32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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set_op(PARAM1, op2 * op3); |
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FORCE_RET(); |
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} |
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|
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OP(not32) |
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{
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uint32_t arg = get_op(PARAM2); |
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set_op(PARAM1, ~arg); |
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FORCE_RET(); |
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} |
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|
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OP(neg32) |
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{
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uint32_t arg = get_op(PARAM2); |
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set_op(PARAM1, -arg); |
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FORCE_RET(); |
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} |
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|
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OP(bswap32) |
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{
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uint32_t arg = get_op(PARAM2); |
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arg = (arg >> 24) | (arg << 24) |
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| ((arg >> 16) & 0xff00) | ((arg << 16) & 0xff0000); |
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set_op(PARAM1, arg); |
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FORCE_RET(); |
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} |
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|
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OP(btest) |
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{
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uint32_t op1 = get_op(PARAM1); |
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uint32_t op2 = get_op(PARAM2); |
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if (op1 & op2)
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env->cc_dest &= ~CCF_Z; |
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else
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env->cc_dest |= CCF_Z; |
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FORCE_RET(); |
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} |
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|
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OP(subx_cc) |
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{
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uint32_t op1 = get_op(PARAM1); |
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uint32_t op2 = get_op(PARAM2); |
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uint32_t res; |
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if (env->cc_x) {
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env->cc_x = (op1 <= op2); |
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env->cc_op = CC_OP_SUBX; |
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res = op1 - (op2 + 1);
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} else {
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env->cc_x = (op1 < op2); |
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env->cc_op = CC_OP_SUB; |
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res = op1 - op2; |
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} |
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set_op(PARAM1, res); |
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FORCE_RET(); |
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} |
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|
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OP(addx_cc) |
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{
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uint32_t op1 = get_op(PARAM1); |
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uint32_t op2 = get_op(PARAM2); |
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uint32_t res; |
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if (env->cc_x) {
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res = op1 + op2 + 1;
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env->cc_x = (res <= op2); |
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env->cc_op = CC_OP_ADDX; |
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} else {
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res = op1 + op2; |
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env->cc_x = (res < op2); |
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env->cc_op = CC_OP_ADD; |
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} |
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set_op(PARAM1, res); |
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FORCE_RET(); |
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} |
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|
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/* Logic ops. */
|
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|
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OP(and32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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set_op(PARAM1, op2 & op3); |
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FORCE_RET(); |
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} |
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|
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OP(or32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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set_op(PARAM1, op2 | op3); |
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FORCE_RET(); |
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} |
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|
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OP(xor32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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set_op(PARAM1, op2 ^ op3); |
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FORCE_RET(); |
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} |
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|
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/* Shifts. */
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OP(shl32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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uint32_t result; |
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result = op2 << op3; |
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set_op(PARAM1, result); |
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FORCE_RET(); |
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} |
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|
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OP(shl_cc) |
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{
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uint32_t op1 = get_op(PARAM1); |
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uint32_t op2 = get_op(PARAM2); |
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uint32_t result; |
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result = op1 << op2; |
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set_op(PARAM1, result); |
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env->cc_x = (op1 << (op2 - 1)) & 1; |
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FORCE_RET(); |
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} |
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|
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OP(shr32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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uint32_t op3 = get_op(PARAM3); |
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uint32_t result; |
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result = op2 >> op3; |
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set_op(PARAM1, result); |
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FORCE_RET(); |
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} |
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|
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OP(shr_cc) |
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{
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uint32_t op1 = get_op(PARAM1); |
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uint32_t op2 = get_op(PARAM2); |
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uint32_t result; |
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result = op1 >> op2; |
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set_op(PARAM1, result); |
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env->cc_x = (op1 >> (op2 - 1)) & 1; |
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FORCE_RET(); |
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} |
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|
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OP(sar_cc) |
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{
|
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int32_t op1 = get_op(PARAM1); |
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uint32_t op2 = get_op(PARAM2); |
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uint32_t result; |
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result = op1 >> op2; |
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set_op(PARAM1, result); |
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env->cc_x = (op1 >> (op2 - 1)) & 1; |
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FORCE_RET(); |
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} |
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|
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/* Value extend. */
|
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|
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OP(ext8u32) |
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{
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uint32_t op2 = get_op(PARAM2); |
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set_op(PARAM1, (uint8_t)op2); |
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FORCE_RET(); |
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} |
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|
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OP(ext8s32) |
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{
|
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uint32_t op2 = get_op(PARAM2); |
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set_op(PARAM1, (int8_t)op2); |
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FORCE_RET(); |
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} |
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|
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OP(ext16u32) |
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{
|
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uint32_t op2 = get_op(PARAM2); |
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set_op(PARAM1, (uint16_t)op2); |
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FORCE_RET(); |
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} |
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|
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OP(ext16s32) |
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{
|
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uint32_t op2 = get_op(PARAM2); |
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set_op(PARAM1, (int16_t)op2); |
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FORCE_RET(); |
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} |
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|
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OP(flush_flags) |
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{
|
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int cc_op = PARAM1;
|
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if (cc_op == CC_OP_DYNAMIC)
|
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cc_op = env->cc_op; |
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cpu_m68k_flush_flags(env, cc_op); |
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FORCE_RET(); |
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} |
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|
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OP(divu) |
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{
|
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uint32_t num; |
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uint32_t den; |
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uint32_t quot; |
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uint32_t rem; |
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uint32_t flags; |
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|
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num = env->div1; |
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den = env->div2; |
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/* ??? This needs to make sure the throwing location is accurate. */
|
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if (den == 0) |
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RAISE_EXCEPTION(EXCP_DIV0); |
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quot = num / den; |
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rem = num % den; |
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flags = 0;
|
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/* Avoid using a PARAM1 of zero. This breaks dyngen because it uses
|
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the address of a symbol, and gcc knows symbols can't have address
|
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zero. */
|
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if (PARAM1 == 2 && quot > 0xffff) |
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flags |= CCF_V; |
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if (quot == 0) |
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flags |= CCF_Z; |
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else if ((int32_t)quot < 0) |
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flags |= CCF_N; |
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env->div1 = quot; |
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env->div2 = rem; |
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env->cc_dest = flags; |
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FORCE_RET(); |
| 357 |
} |
| 358 |
|
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OP(divs) |
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{
|
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int32_t num; |
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int32_t den; |
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int32_t quot; |
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int32_t rem; |
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int32_t flags; |
| 366 |
|
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num = env->div1; |
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den = env->div2; |
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if (den == 0) |
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RAISE_EXCEPTION(EXCP_DIV0); |
| 371 |
quot = num / den; |
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rem = num % den; |
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flags = 0;
|
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if (PARAM1 == 2 && quot != (int16_t)quot) |
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flags |= CCF_V; |
| 376 |
if (quot == 0) |
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flags |= CCF_Z; |
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else if (quot < 0) |
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flags |= CCF_N; |
| 380 |
env->div1 = quot; |
| 381 |
env->div2 = rem; |
| 382 |
env->cc_dest = flags; |
| 383 |
FORCE_RET(); |
| 384 |
} |
| 385 |
|
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OP(halt) |
| 387 |
{
|
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env->halted = 1;
|
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RAISE_EXCEPTION(EXCP_HLT); |
| 390 |
FORCE_RET(); |
| 391 |
} |
| 392 |
|
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OP(raise_exception) |
| 394 |
{
|
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RAISE_EXCEPTION(PARAM1); |
| 396 |
FORCE_RET(); |
| 397 |
} |
| 398 |
|
| 399 |
/* Floating point comparison sets flags differently to other instructions. */
|
| 400 |
|
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OP(sub_cmpf64) |
| 402 |
{
|
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float64 src0; |
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float64 src1; |
| 405 |
src0 = get_opf64(PARAM2); |
| 406 |
src1 = get_opf64(PARAM3); |
| 407 |
set_opf64(PARAM1, helper_sub_cmpf64(env, src0, src1)); |
| 408 |
FORCE_RET(); |
| 409 |
} |
| 410 |
|
| 411 |
OP(update_xflag_tst) |
| 412 |
{
|
| 413 |
uint32_t op1 = get_op(PARAM1); |
| 414 |
env->cc_x = op1; |
| 415 |
FORCE_RET(); |
| 416 |
} |
| 417 |
|
| 418 |
OP(update_xflag_lt) |
| 419 |
{
|
| 420 |
uint32_t op1 = get_op(PARAM1); |
| 421 |
uint32_t op2 = get_op(PARAM2); |
| 422 |
env->cc_x = (op1 < op2); |
| 423 |
FORCE_RET(); |
| 424 |
} |
| 425 |
|
| 426 |
OP(get_xflag) |
| 427 |
{
|
| 428 |
set_op(PARAM1, env->cc_x); |
| 429 |
FORCE_RET(); |
| 430 |
} |
| 431 |
|
| 432 |
OP(logic_cc) |
| 433 |
{
|
| 434 |
uint32_t op1 = get_op(PARAM1); |
| 435 |
env->cc_dest = op1; |
| 436 |
FORCE_RET(); |
| 437 |
} |
| 438 |
|
| 439 |
OP(update_cc_add) |
| 440 |
{
|
| 441 |
uint32_t op1 = get_op(PARAM1); |
| 442 |
uint32_t op2 = get_op(PARAM2); |
| 443 |
env->cc_dest = op1; |
| 444 |
env->cc_src = op2; |
| 445 |
FORCE_RET(); |
| 446 |
} |
| 447 |
|
| 448 |
OP(fp_result) |
| 449 |
{
|
| 450 |
env->fp_result = get_opf64(PARAM1); |
| 451 |
FORCE_RET(); |
| 452 |
} |
| 453 |
|
| 454 |
OP(jmp) |
| 455 |
{
|
| 456 |
GOTO_LABEL_PARAM(1);
|
| 457 |
} |
| 458 |
|
| 459 |
/* These ops involve a function call, which probably requires a stack frame
|
| 460 |
and breaks things on some hosts. */
|
| 461 |
OP(jmp_z32) |
| 462 |
{
|
| 463 |
uint32_t arg = get_op(PARAM1); |
| 464 |
if (arg == 0) |
| 465 |
GOTO_LABEL_PARAM(2);
|
| 466 |
FORCE_RET(); |
| 467 |
} |
| 468 |
|
| 469 |
OP(jmp_nz32) |
| 470 |
{
|
| 471 |
uint32_t arg = get_op(PARAM1); |
| 472 |
if (arg != 0) |
| 473 |
GOTO_LABEL_PARAM(2);
|
| 474 |
FORCE_RET(); |
| 475 |
} |
| 476 |
|
| 477 |
OP(jmp_s32) |
| 478 |
{
|
| 479 |
int32_t arg = get_op(PARAM1); |
| 480 |
if (arg < 0) |
| 481 |
GOTO_LABEL_PARAM(2);
|
| 482 |
FORCE_RET(); |
| 483 |
} |
| 484 |
|
| 485 |
OP(jmp_ns32) |
| 486 |
{
|
| 487 |
int32_t arg = get_op(PARAM1); |
| 488 |
if (arg >= 0) |
| 489 |
GOTO_LABEL_PARAM(2);
|
| 490 |
FORCE_RET(); |
| 491 |
} |
| 492 |
|
| 493 |
void OPPROTO op_goto_tb0(void) |
| 494 |
{
|
| 495 |
GOTO_TB(op_goto_tb0, PARAM1, 0);
|
| 496 |
} |
| 497 |
|
| 498 |
void OPPROTO op_goto_tb1(void) |
| 499 |
{
|
| 500 |
GOTO_TB(op_goto_tb1, PARAM1, 1);
|
| 501 |
} |
| 502 |
|
| 503 |
OP(exit_tb) |
| 504 |
{
|
| 505 |
EXIT_TB(); |
| 506 |
} |
| 507 |
|
| 508 |
|
| 509 |
/* Floating point. */
|
| 510 |
OP(f64_to_i32) |
| 511 |
{
|
| 512 |
set_op(PARAM1, float64_to_int32(get_opf64(PARAM2), &CPU_FP_STATUS)); |
| 513 |
FORCE_RET(); |
| 514 |
} |
| 515 |
|
| 516 |
OP(f64_to_f32) |
| 517 |
{
|
| 518 |
union {
|
| 519 |
float32 f; |
| 520 |
uint32_t i; |
| 521 |
} u; |
| 522 |
u.f = float64_to_float32(get_opf64(PARAM2), &CPU_FP_STATUS); |
| 523 |
set_op(PARAM1, u.i); |
| 524 |
FORCE_RET(); |
| 525 |
} |
| 526 |
|
| 527 |
OP(i32_to_f64) |
| 528 |
{
|
| 529 |
set_opf64(PARAM1, int32_to_float64(get_op(PARAM2), &CPU_FP_STATUS)); |
| 530 |
FORCE_RET(); |
| 531 |
} |
| 532 |
|
| 533 |
OP(f32_to_f64) |
| 534 |
{
|
| 535 |
union {
|
| 536 |
float32 f; |
| 537 |
uint32_t i; |
| 538 |
} u; |
| 539 |
u.i = get_op(PARAM2); |
| 540 |
set_opf64(PARAM1, float32_to_float64(u.f, &CPU_FP_STATUS)); |
| 541 |
FORCE_RET(); |
| 542 |
} |
| 543 |
|
| 544 |
OP(absf64) |
| 545 |
{
|
| 546 |
float64 op0 = get_opf64(PARAM2); |
| 547 |
set_opf64(PARAM1, float64_abs(op0)); |
| 548 |
FORCE_RET(); |
| 549 |
} |
| 550 |
|
| 551 |
OP(chsf64) |
| 552 |
{
|
| 553 |
float64 op0 = get_opf64(PARAM2); |
| 554 |
set_opf64(PARAM1, float64_chs(op0)); |
| 555 |
FORCE_RET(); |
| 556 |
} |
| 557 |
|
| 558 |
OP(sqrtf64) |
| 559 |
{
|
| 560 |
float64 op0 = get_opf64(PARAM2); |
| 561 |
set_opf64(PARAM1, float64_sqrt(op0, &CPU_FP_STATUS)); |
| 562 |
FORCE_RET(); |
| 563 |
} |
| 564 |
|
| 565 |
OP(addf64) |
| 566 |
{
|
| 567 |
float64 op0 = get_opf64(PARAM2); |
| 568 |
float64 op1 = get_opf64(PARAM3); |
| 569 |
set_opf64(PARAM1, float64_add(op0, op1, &CPU_FP_STATUS)); |
| 570 |
FORCE_RET(); |
| 571 |
} |
| 572 |
|
| 573 |
OP(subf64) |
| 574 |
{
|
| 575 |
float64 op0 = get_opf64(PARAM2); |
| 576 |
float64 op1 = get_opf64(PARAM3); |
| 577 |
set_opf64(PARAM1, float64_sub(op0, op1, &CPU_FP_STATUS)); |
| 578 |
FORCE_RET(); |
| 579 |
} |
| 580 |
|
| 581 |
OP(mulf64) |
| 582 |
{
|
| 583 |
float64 op0 = get_opf64(PARAM2); |
| 584 |
float64 op1 = get_opf64(PARAM3); |
| 585 |
set_opf64(PARAM1, float64_mul(op0, op1, &CPU_FP_STATUS)); |
| 586 |
FORCE_RET(); |
| 587 |
} |
| 588 |
|
| 589 |
OP(divf64) |
| 590 |
{
|
| 591 |
float64 op0 = get_opf64(PARAM2); |
| 592 |
float64 op1 = get_opf64(PARAM3); |
| 593 |
set_opf64(PARAM1, float64_div(op0, op1, &CPU_FP_STATUS)); |
| 594 |
FORCE_RET(); |
| 595 |
} |
| 596 |
|
| 597 |
OP(iround_f64) |
| 598 |
{
|
| 599 |
float64 op0 = get_opf64(PARAM2); |
| 600 |
set_opf64(PARAM1, float64_round_to_int(op0, &CPU_FP_STATUS)); |
| 601 |
FORCE_RET(); |
| 602 |
} |
| 603 |
|
| 604 |
OP(itrunc_f64) |
| 605 |
{
|
| 606 |
float64 op0 = get_opf64(PARAM2); |
| 607 |
set_opf64(PARAM1, float64_trunc_to_int(op0, &CPU_FP_STATUS)); |
| 608 |
FORCE_RET(); |
| 609 |
} |
| 610 |
|
| 611 |
OP(compare_quietf64) |
| 612 |
{
|
| 613 |
float64 op0 = get_opf64(PARAM2); |
| 614 |
float64 op1 = get_opf64(PARAM3); |
| 615 |
set_op(PARAM1, float64_compare_quiet(op0, op1, &CPU_FP_STATUS)); |
| 616 |
FORCE_RET(); |
| 617 |
} |
| 618 |
|
| 619 |
OP(movec) |
| 620 |
{
|
| 621 |
int op1 = get_op(PARAM1);
|
| 622 |
uint32_t op2 = get_op(PARAM2); |
| 623 |
helper_movec(env, op1, op2); |
| 624 |
} |
| 625 |
|
| 626 |
/* Memory access. */
|
| 627 |
|
| 628 |
#define MEMSUFFIX _raw
|
| 629 |
#include "op_mem.h" |
| 630 |
|
| 631 |
#if !defined(CONFIG_USER_ONLY)
|
| 632 |
#define MEMSUFFIX _user
|
| 633 |
#include "op_mem.h" |
| 634 |
#define MEMSUFFIX _kernel
|
| 635 |
#include "op_mem.h" |
| 636 |
#endif
|