root / target-m68k / op.c @ 86cc1ce0
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/*
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* m68k micro operations
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*
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* Copyright (c) 2006 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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#ifndef offsetof
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#define offsetof(type, field) ((size_t) &((type *)0)->field) |
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#endif
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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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#define CPU_FP_STATUS env->fp_status
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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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#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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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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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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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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#define OP(name) void OPPROTO op_##name (void) |
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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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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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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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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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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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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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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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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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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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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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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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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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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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/* Logic ops. */
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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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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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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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/* 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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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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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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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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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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/* Value extend. */
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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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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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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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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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/* Load/store ops. */
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OP(ld8u32) |
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{ |
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uint32_t addr = get_op(PARAM2); |
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set_op(PARAM1, ldub(addr)); |
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FORCE_RET(); |
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} |
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OP(ld8s32) |
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{ |
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uint32_t addr = get_op(PARAM2); |
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set_op(PARAM1, ldsb(addr)); |
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FORCE_RET(); |
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} |
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OP(ld16u32) |
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{ |
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uint32_t addr = get_op(PARAM2); |
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set_op(PARAM1, lduw(addr)); |
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FORCE_RET(); |
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} |
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OP(ld16s32) |
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{ |
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uint32_t addr = get_op(PARAM2); |
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set_op(PARAM1, ldsw(addr)); |
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FORCE_RET(); |
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} |
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OP(ld32) |
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{ |
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uint32_t addr = get_op(PARAM2); |
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set_op(PARAM1, ldl(addr)); |
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FORCE_RET(); |
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} |
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|
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OP(st8) |
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{ |
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uint32_t addr = get_op(PARAM1); |
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stb(addr, get_op(PARAM2)); |
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FORCE_RET(); |
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} |
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|
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OP(st16) |
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{ |
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uint32_t addr = get_op(PARAM1); |
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stw(addr, get_op(PARAM2)); |
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FORCE_RET(); |
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} |
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OP(st32) |
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{ |
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uint32_t addr = get_op(PARAM1); |
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stl(addr, get_op(PARAM2)); |
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FORCE_RET(); |
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} |
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|
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OP(ldf64) |
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{ |
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uint32_t addr = get_op(PARAM2); |
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set_opf64(PARAM1, ldfq(addr)); |
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FORCE_RET(); |
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} |
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OP(stf64) |
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{ |
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uint32_t addr = get_op(PARAM1); |
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stfq(addr, get_opf64(PARAM2)); |
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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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} |
398 |
|
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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); |
412 |
quot = num / den; |
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rem = num % den; |
414 |
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) |
419 |
flags |= CCF_V; |
420 |
if (quot == 0) |
421 |
flags |= CCF_Z; |
422 |
else if ((int32_t)quot < 0) |
423 |
flags |= CCF_N; |
424 |
env->div1 = quot; |
425 |
env->div2 = rem; |
426 |
env->cc_dest = flags; |
427 |
FORCE_RET(); |
428 |
} |
429 |
|
430 |
OP(divs) |
431 |
{ |
432 |
int32_t num; |
433 |
int32_t den; |
434 |
int32_t quot; |
435 |
int32_t rem; |
436 |
int32_t flags; |
437 |
|
438 |
num = env->div1; |
439 |
den = env->div2; |
440 |
if (den == 0) |
441 |
RAISE_EXCEPTION(EXCP_DIV0); |
442 |
quot = num / den; |
443 |
rem = num % den; |
444 |
flags = 0;
|
445 |
if (PARAM1 == 2 && quot != (int16_t)quot) |
446 |
flags |= CCF_V; |
447 |
if (quot == 0) |
448 |
flags |= CCF_Z; |
449 |
else if (quot < 0) |
450 |
flags |= CCF_N; |
451 |
env->div1 = quot; |
452 |
env->div2 = rem; |
453 |
env->cc_dest = flags; |
454 |
FORCE_RET(); |
455 |
} |
456 |
|
457 |
OP(raise_exception) |
458 |
{ |
459 |
RAISE_EXCEPTION(PARAM1); |
460 |
FORCE_RET(); |
461 |
} |
462 |
|
463 |
/* Floating point comparison sets flags differently to other instructions. */
|
464 |
|
465 |
OP(sub_cmpf64) |
466 |
{ |
467 |
float64 src0; |
468 |
float64 src1; |
469 |
src0 = get_opf64(PARAM2); |
470 |
src1 = get_opf64(PARAM3); |
471 |
set_opf64(PARAM1, helper_sub_cmpf64(env, src0, src1)); |
472 |
FORCE_RET(); |
473 |
} |
474 |
|
475 |
OP(update_xflag_tst) |
476 |
{ |
477 |
uint32_t op1 = get_op(PARAM1); |
478 |
env->cc_x = op1; |
479 |
FORCE_RET(); |
480 |
} |
481 |
|
482 |
OP(update_xflag_lt) |
483 |
{ |
484 |
uint32_t op1 = get_op(PARAM1); |
485 |
uint32_t op2 = get_op(PARAM2); |
486 |
env->cc_x = (op1 < op2); |
487 |
FORCE_RET(); |
488 |
} |
489 |
|
490 |
OP(get_xflag) |
491 |
{ |
492 |
set_op(PARAM1, env->cc_x); |
493 |
FORCE_RET(); |
494 |
} |
495 |
|
496 |
OP(logic_cc) |
497 |
{ |
498 |
uint32_t op1 = get_op(PARAM1); |
499 |
env->cc_dest = op1; |
500 |
FORCE_RET(); |
501 |
} |
502 |
|
503 |
OP(update_cc_add) |
504 |
{ |
505 |
uint32_t op1 = get_op(PARAM1); |
506 |
uint32_t op2 = get_op(PARAM2); |
507 |
env->cc_dest = op1; |
508 |
env->cc_src = op2; |
509 |
FORCE_RET(); |
510 |
} |
511 |
|
512 |
OP(fp_result) |
513 |
{ |
514 |
env->fp_result = get_opf64(PARAM1); |
515 |
FORCE_RET(); |
516 |
} |
517 |
|
518 |
OP(jmp) |
519 |
{ |
520 |
GOTO_LABEL_PARAM(1);
|
521 |
} |
522 |
|
523 |
/* These ops involve a function call, which probably requires a stack frame
|
524 |
and breaks things on some hosts. */
|
525 |
OP(jmp_z32) |
526 |
{ |
527 |
uint32_t arg = get_op(PARAM1); |
528 |
if (arg == 0) |
529 |
GOTO_LABEL_PARAM(2);
|
530 |
FORCE_RET(); |
531 |
} |
532 |
|
533 |
OP(jmp_nz32) |
534 |
{ |
535 |
uint32_t arg = get_op(PARAM1); |
536 |
if (arg != 0) |
537 |
GOTO_LABEL_PARAM(2);
|
538 |
FORCE_RET(); |
539 |
} |
540 |
|
541 |
OP(jmp_s32) |
542 |
{ |
543 |
int32_t arg = get_op(PARAM1); |
544 |
if (arg < 0) |
545 |
GOTO_LABEL_PARAM(2);
|
546 |
FORCE_RET(); |
547 |
} |
548 |
|
549 |
OP(jmp_ns32) |
550 |
{ |
551 |
int32_t arg = get_op(PARAM1); |
552 |
if (arg >= 0) |
553 |
GOTO_LABEL_PARAM(2);
|
554 |
FORCE_RET(); |
555 |
} |
556 |
|
557 |
void OPPROTO op_goto_tb0(void) |
558 |
{ |
559 |
GOTO_TB(op_goto_tb0, PARAM1, 0);
|
560 |
} |
561 |
|
562 |
void OPPROTO op_goto_tb1(void) |
563 |
{ |
564 |
GOTO_TB(op_goto_tb1, PARAM1, 1);
|
565 |
} |
566 |
|
567 |
OP(exit_tb) |
568 |
{ |
569 |
EXIT_TB(); |
570 |
} |
571 |
|
572 |
|
573 |
/* Floating point. */
|
574 |
OP(f64_to_i32) |
575 |
{ |
576 |
set_op(PARAM1, float64_to_int32(get_opf64(PARAM2), &CPU_FP_STATUS)); |
577 |
FORCE_RET(); |
578 |
} |
579 |
|
580 |
OP(f64_to_f32) |
581 |
{ |
582 |
union {
|
583 |
float32 f; |
584 |
uint32_t i; |
585 |
} u; |
586 |
u.f = float64_to_float32(get_opf64(PARAM2), &CPU_FP_STATUS); |
587 |
set_op(PARAM1, u.i); |
588 |
FORCE_RET(); |
589 |
} |
590 |
|
591 |
OP(i32_to_f64) |
592 |
{ |
593 |
set_opf64(PARAM1, int32_to_float64(get_op(PARAM2), &CPU_FP_STATUS)); |
594 |
FORCE_RET(); |
595 |
} |
596 |
|
597 |
OP(f32_to_f64) |
598 |
{ |
599 |
union {
|
600 |
float32 f; |
601 |
uint32_t i; |
602 |
} u; |
603 |
u.i = get_op(PARAM2); |
604 |
set_opf64(PARAM1, float32_to_float64(u.f, &CPU_FP_STATUS)); |
605 |
FORCE_RET(); |
606 |
} |
607 |
|
608 |
OP(absf64) |
609 |
{ |
610 |
float64 op0 = get_opf64(PARAM2); |
611 |
set_opf64(PARAM1, float64_abs(op0)); |
612 |
FORCE_RET(); |
613 |
} |
614 |
|
615 |
OP(chsf64) |
616 |
{ |
617 |
float64 op0 = get_opf64(PARAM2); |
618 |
set_opf64(PARAM1, float64_chs(op0)); |
619 |
FORCE_RET(); |
620 |
} |
621 |
|
622 |
OP(sqrtf64) |
623 |
{ |
624 |
float64 op0 = get_opf64(PARAM2); |
625 |
set_opf64(PARAM1, float64_sqrt(op0, &CPU_FP_STATUS)); |
626 |
FORCE_RET(); |
627 |
} |
628 |
|
629 |
OP(addf64) |
630 |
{ |
631 |
float64 op0 = get_opf64(PARAM2); |
632 |
float64 op1 = get_opf64(PARAM3); |
633 |
set_opf64(PARAM1, float64_add(op0, op1, &CPU_FP_STATUS)); |
634 |
FORCE_RET(); |
635 |
} |
636 |
|
637 |
OP(subf64) |
638 |
{ |
639 |
float64 op0 = get_opf64(PARAM2); |
640 |
float64 op1 = get_opf64(PARAM3); |
641 |
set_opf64(PARAM1, float64_sub(op0, op1, &CPU_FP_STATUS)); |
642 |
FORCE_RET(); |
643 |
} |
644 |
|
645 |
OP(mulf64) |
646 |
{ |
647 |
float64 op0 = get_opf64(PARAM2); |
648 |
float64 op1 = get_opf64(PARAM3); |
649 |
set_opf64(PARAM1, float64_mul(op0, op1, &CPU_FP_STATUS)); |
650 |
FORCE_RET(); |
651 |
} |
652 |
|
653 |
OP(divf64) |
654 |
{ |
655 |
float64 op0 = get_opf64(PARAM2); |
656 |
float64 op1 = get_opf64(PARAM3); |
657 |
set_opf64(PARAM1, float64_div(op0, op1, &CPU_FP_STATUS)); |
658 |
FORCE_RET(); |
659 |
} |
660 |
|
661 |
OP(iround_f64) |
662 |
{ |
663 |
float64 op0 = get_opf64(PARAM2); |
664 |
set_opf64(PARAM1, float64_round_to_int(op0, &CPU_FP_STATUS)); |
665 |
FORCE_RET(); |
666 |
} |
667 |
|
668 |
OP(itrunc_f64) |
669 |
{ |
670 |
float64 op0 = get_opf64(PARAM2); |
671 |
set_opf64(PARAM1, float64_trunc_to_int(op0, &CPU_FP_STATUS)); |
672 |
FORCE_RET(); |
673 |
} |
674 |
|
675 |
OP(compare_quietf64) |
676 |
{ |
677 |
float64 op0 = get_opf64(PARAM2); |
678 |
float64 op1 = get_opf64(PARAM3); |
679 |
set_op(PARAM1, float64_compare_quiet(op0, op1, &CPU_FP_STATUS)); |
680 |
FORCE_RET(); |
681 |
} |