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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 >= TARGET_NUM_QREGS) {
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return env->qregs[qreg - TARGET_NUM_QREGS];
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} else if (qreg == QREG_T0) { |
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return T0;
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} else {
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return *(uint32_t *)(((long)env) + qreg_offsets[qreg]); |
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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 >= TARGET_NUM_QREGS) {
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env->qregs[qreg - TARGET_NUM_QREGS] = val; |
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} else if (qreg == QREG_T0) { |
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T0 = val; |
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} else {
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*(uint32_t *)(((long)env) + qreg_offsets[qreg]) = 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(ff1) |
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{
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uint32_t arg = get_op(PARAM2); |
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int n;
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for (n = 32; arg; n--) |
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arg >>= 1;
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set_op(PARAM1, n); |
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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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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(sar32) |
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{
|
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int32_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(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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cpu_m68k_flush_flags(env, 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); |
| 358 |
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; |
| 366 |
if (quot == 0) |
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flags |= CCF_Z; |
| 368 |
else if ((int32_t)quot < 0) |
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flags |= CCF_N; |
| 370 |
env->div1 = quot; |
| 371 |
env->div2 = rem; |
| 372 |
env->cc_dest = flags; |
| 373 |
FORCE_RET(); |
| 374 |
} |
| 375 |
|
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OP(divs) |
| 377 |
{
|
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int32_t num; |
| 379 |
int32_t den; |
| 380 |
int32_t quot; |
| 381 |
int32_t rem; |
| 382 |
int32_t flags; |
| 383 |
|
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num = env->div1; |
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den = env->div2; |
| 386 |
if (den == 0) |
| 387 |
RAISE_EXCEPTION(EXCP_DIV0); |
| 388 |
quot = num / den; |
| 389 |
rem = num % den; |
| 390 |
flags = 0;
|
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if (PARAM1 == 2 && quot != (int16_t)quot) |
| 392 |
flags |= CCF_V; |
| 393 |
if (quot == 0) |
| 394 |
flags |= CCF_Z; |
| 395 |
else if (quot < 0) |
| 396 |
flags |= CCF_N; |
| 397 |
env->div1 = quot; |
| 398 |
env->div2 = rem; |
| 399 |
env->cc_dest = flags; |
| 400 |
FORCE_RET(); |
| 401 |
} |
| 402 |
|
| 403 |
/* Halt is special because it may be a semihosting call. */
|
| 404 |
OP(halt) |
| 405 |
{
|
| 406 |
RAISE_EXCEPTION(EXCP_HALT_INSN); |
| 407 |
FORCE_RET(); |
| 408 |
} |
| 409 |
|
| 410 |
OP(stop) |
| 411 |
{
|
| 412 |
env->halted = 1;
|
| 413 |
RAISE_EXCEPTION(EXCP_HLT); |
| 414 |
FORCE_RET(); |
| 415 |
} |
| 416 |
|
| 417 |
OP(raise_exception) |
| 418 |
{
|
| 419 |
RAISE_EXCEPTION(PARAM1); |
| 420 |
FORCE_RET(); |
| 421 |
} |
| 422 |
|
| 423 |
/* Floating point comparison sets flags differently to other instructions. */
|
| 424 |
|
| 425 |
OP(sub_cmpf64) |
| 426 |
{
|
| 427 |
float64 src0; |
| 428 |
float64 src1; |
| 429 |
src0 = get_opf64(PARAM2); |
| 430 |
src1 = get_opf64(PARAM3); |
| 431 |
set_opf64(PARAM1, helper_sub_cmpf64(env, src0, src1)); |
| 432 |
FORCE_RET(); |
| 433 |
} |
| 434 |
|
| 435 |
OP(update_xflag_tst) |
| 436 |
{
|
| 437 |
uint32_t op1 = get_op(PARAM1); |
| 438 |
env->cc_x = op1; |
| 439 |
FORCE_RET(); |
| 440 |
} |
| 441 |
|
| 442 |
OP(update_xflag_lt) |
| 443 |
{
|
| 444 |
uint32_t op1 = get_op(PARAM1); |
| 445 |
uint32_t op2 = get_op(PARAM2); |
| 446 |
env->cc_x = (op1 < op2); |
| 447 |
FORCE_RET(); |
| 448 |
} |
| 449 |
|
| 450 |
OP(get_xflag) |
| 451 |
{
|
| 452 |
set_op(PARAM1, env->cc_x); |
| 453 |
FORCE_RET(); |
| 454 |
} |
| 455 |
|
| 456 |
OP(logic_cc) |
| 457 |
{
|
| 458 |
uint32_t op1 = get_op(PARAM1); |
| 459 |
env->cc_dest = op1; |
| 460 |
FORCE_RET(); |
| 461 |
} |
| 462 |
|
| 463 |
OP(update_cc_add) |
| 464 |
{
|
| 465 |
uint32_t op1 = get_op(PARAM1); |
| 466 |
uint32_t op2 = get_op(PARAM2); |
| 467 |
env->cc_dest = op1; |
| 468 |
env->cc_src = op2; |
| 469 |
FORCE_RET(); |
| 470 |
} |
| 471 |
|
| 472 |
OP(fp_result) |
| 473 |
{
|
| 474 |
env->fp_result = get_opf64(PARAM1); |
| 475 |
FORCE_RET(); |
| 476 |
} |
| 477 |
|
| 478 |
OP(set_sr) |
| 479 |
{
|
| 480 |
env->sr = get_op(PARAM1) & 0xffff;
|
| 481 |
m68k_switch_sp(env); |
| 482 |
FORCE_RET(); |
| 483 |
} |
| 484 |
|
| 485 |
OP(jmp) |
| 486 |
{
|
| 487 |
GOTO_LABEL_PARAM(1);
|
| 488 |
} |
| 489 |
|
| 490 |
/* These ops involve a function call, which probably requires a stack frame
|
| 491 |
and breaks things on some hosts. */
|
| 492 |
OP(jmp_z32) |
| 493 |
{
|
| 494 |
uint32_t arg = get_op(PARAM1); |
| 495 |
if (arg == 0) |
| 496 |
GOTO_LABEL_PARAM(2);
|
| 497 |
FORCE_RET(); |
| 498 |
} |
| 499 |
|
| 500 |
OP(jmp_nz32) |
| 501 |
{
|
| 502 |
uint32_t arg = get_op(PARAM1); |
| 503 |
if (arg != 0) |
| 504 |
GOTO_LABEL_PARAM(2);
|
| 505 |
FORCE_RET(); |
| 506 |
} |
| 507 |
|
| 508 |
OP(jmp_s32) |
| 509 |
{
|
| 510 |
int32_t arg = get_op(PARAM1); |
| 511 |
if (arg < 0) |
| 512 |
GOTO_LABEL_PARAM(2);
|
| 513 |
FORCE_RET(); |
| 514 |
} |
| 515 |
|
| 516 |
OP(jmp_ns32) |
| 517 |
{
|
| 518 |
int32_t arg = get_op(PARAM1); |
| 519 |
if (arg >= 0) |
| 520 |
GOTO_LABEL_PARAM(2);
|
| 521 |
FORCE_RET(); |
| 522 |
} |
| 523 |
|
| 524 |
void OPPROTO op_goto_tb0(void) |
| 525 |
{
|
| 526 |
GOTO_TB(op_goto_tb0, PARAM1, 0);
|
| 527 |
} |
| 528 |
|
| 529 |
void OPPROTO op_goto_tb1(void) |
| 530 |
{
|
| 531 |
GOTO_TB(op_goto_tb1, PARAM1, 1);
|
| 532 |
} |
| 533 |
|
| 534 |
OP(exit_tb) |
| 535 |
{
|
| 536 |
EXIT_TB(); |
| 537 |
} |
| 538 |
|
| 539 |
|
| 540 |
/* Floating point. */
|
| 541 |
OP(f64_to_i32) |
| 542 |
{
|
| 543 |
set_op(PARAM1, float64_to_int32(get_opf64(PARAM2), &CPU_FP_STATUS)); |
| 544 |
FORCE_RET(); |
| 545 |
} |
| 546 |
|
| 547 |
OP(f64_to_f32) |
| 548 |
{
|
| 549 |
union {
|
| 550 |
float32 f; |
| 551 |
uint32_t i; |
| 552 |
} u; |
| 553 |
u.f = float64_to_float32(get_opf64(PARAM2), &CPU_FP_STATUS); |
| 554 |
set_op(PARAM1, u.i); |
| 555 |
FORCE_RET(); |
| 556 |
} |
| 557 |
|
| 558 |
OP(i32_to_f64) |
| 559 |
{
|
| 560 |
set_opf64(PARAM1, int32_to_float64(get_op(PARAM2), &CPU_FP_STATUS)); |
| 561 |
FORCE_RET(); |
| 562 |
} |
| 563 |
|
| 564 |
OP(f32_to_f64) |
| 565 |
{
|
| 566 |
union {
|
| 567 |
float32 f; |
| 568 |
uint32_t i; |
| 569 |
} u; |
| 570 |
u.i = get_op(PARAM2); |
| 571 |
set_opf64(PARAM1, float32_to_float64(u.f, &CPU_FP_STATUS)); |
| 572 |
FORCE_RET(); |
| 573 |
} |
| 574 |
|
| 575 |
OP(absf64) |
| 576 |
{
|
| 577 |
float64 op0 = get_opf64(PARAM2); |
| 578 |
set_opf64(PARAM1, float64_abs(op0)); |
| 579 |
FORCE_RET(); |
| 580 |
} |
| 581 |
|
| 582 |
OP(chsf64) |
| 583 |
{
|
| 584 |
float64 op0 = get_opf64(PARAM2); |
| 585 |
set_opf64(PARAM1, float64_chs(op0)); |
| 586 |
FORCE_RET(); |
| 587 |
} |
| 588 |
|
| 589 |
OP(sqrtf64) |
| 590 |
{
|
| 591 |
float64 op0 = get_opf64(PARAM2); |
| 592 |
set_opf64(PARAM1, float64_sqrt(op0, &CPU_FP_STATUS)); |
| 593 |
FORCE_RET(); |
| 594 |
} |
| 595 |
|
| 596 |
OP(addf64) |
| 597 |
{
|
| 598 |
float64 op0 = get_opf64(PARAM2); |
| 599 |
float64 op1 = get_opf64(PARAM3); |
| 600 |
set_opf64(PARAM1, float64_add(op0, op1, &CPU_FP_STATUS)); |
| 601 |
FORCE_RET(); |
| 602 |
} |
| 603 |
|
| 604 |
OP(subf64) |
| 605 |
{
|
| 606 |
float64 op0 = get_opf64(PARAM2); |
| 607 |
float64 op1 = get_opf64(PARAM3); |
| 608 |
set_opf64(PARAM1, float64_sub(op0, op1, &CPU_FP_STATUS)); |
| 609 |
FORCE_RET(); |
| 610 |
} |
| 611 |
|
| 612 |
OP(mulf64) |
| 613 |
{
|
| 614 |
float64 op0 = get_opf64(PARAM2); |
| 615 |
float64 op1 = get_opf64(PARAM3); |
| 616 |
set_opf64(PARAM1, float64_mul(op0, op1, &CPU_FP_STATUS)); |
| 617 |
FORCE_RET(); |
| 618 |
} |
| 619 |
|
| 620 |
OP(divf64) |
| 621 |
{
|
| 622 |
float64 op0 = get_opf64(PARAM2); |
| 623 |
float64 op1 = get_opf64(PARAM3); |
| 624 |
set_opf64(PARAM1, float64_div(op0, op1, &CPU_FP_STATUS)); |
| 625 |
FORCE_RET(); |
| 626 |
} |
| 627 |
|
| 628 |
OP(iround_f64) |
| 629 |
{
|
| 630 |
float64 op0 = get_opf64(PARAM2); |
| 631 |
set_opf64(PARAM1, float64_round_to_int(op0, &CPU_FP_STATUS)); |
| 632 |
FORCE_RET(); |
| 633 |
} |
| 634 |
|
| 635 |
OP(itrunc_f64) |
| 636 |
{
|
| 637 |
float64 op0 = get_opf64(PARAM2); |
| 638 |
set_opf64(PARAM1, float64_trunc_to_int(op0, &CPU_FP_STATUS)); |
| 639 |
FORCE_RET(); |
| 640 |
} |
| 641 |
|
| 642 |
OP(compare_quietf64) |
| 643 |
{
|
| 644 |
float64 op0 = get_opf64(PARAM2); |
| 645 |
float64 op1 = get_opf64(PARAM3); |
| 646 |
set_op(PARAM1, float64_compare_quiet(op0, op1, &CPU_FP_STATUS)); |
| 647 |
FORCE_RET(); |
| 648 |
} |
| 649 |
|
| 650 |
OP(movec) |
| 651 |
{
|
| 652 |
int op1 = get_op(PARAM1);
|
| 653 |
uint32_t op2 = get_op(PARAM2); |
| 654 |
helper_movec(env, op1, op2); |
| 655 |
} |
| 656 |
|
| 657 |
/* Memory access. */
|
| 658 |
|
| 659 |
#define MEMSUFFIX _raw
|
| 660 |
#include "op_mem.h" |
| 661 |
|
| 662 |
#if !defined(CONFIG_USER_ONLY)
|
| 663 |
#define MEMSUFFIX _user
|
| 664 |
#include "op_mem.h" |
| 665 |
#define MEMSUFFIX _kernel
|
| 666 |
#include "op_mem.h" |
| 667 |
#endif
|
| 668 |
|
| 669 |
/* MAC unit. */
|
| 670 |
/* TODO: The MAC instructions use 64-bit arithmetic fairly extensively.
|
| 671 |
This results in fairly large ops (and sometimes other issues) on 32-bit
|
| 672 |
hosts. Maybe move most of them into helpers. */
|
| 673 |
OP(macmuls) |
| 674 |
{
|
| 675 |
uint32_t op1 = get_op(PARAM1); |
| 676 |
uint32_t op2 = get_op(PARAM2); |
| 677 |
int64_t product; |
| 678 |
int64_t res; |
| 679 |
|
| 680 |
product = (uint64_t)op1 * op2; |
| 681 |
res = (product << 24) >> 24; |
| 682 |
if (res != product) {
|
| 683 |
env->macsr |= MACSR_V; |
| 684 |
if (env->macsr & MACSR_OMC) {
|
| 685 |
/* Make sure the accumulate operation overflows. */
|
| 686 |
if (product < 0) |
| 687 |
res = ~(1ll << 50); |
| 688 |
else
|
| 689 |
res = 1ll << 50; |
| 690 |
} |
| 691 |
} |
| 692 |
env->mactmp = res; |
| 693 |
FORCE_RET(); |
| 694 |
} |
| 695 |
|
| 696 |
OP(macmulu) |
| 697 |
{
|
| 698 |
uint32_t op1 = get_op(PARAM1); |
| 699 |
uint32_t op2 = get_op(PARAM2); |
| 700 |
uint64_t product; |
| 701 |
|
| 702 |
product = (uint64_t)op1 * op2; |
| 703 |
if (product & (0xffffffull << 40)) { |
| 704 |
env->macsr |= MACSR_V; |
| 705 |
if (env->macsr & MACSR_OMC) {
|
| 706 |
/* Make sure the accumulate operation overflows. */
|
| 707 |
product = 1ll << 50; |
| 708 |
} else {
|
| 709 |
product &= ((1ull << 40) - 1); |
| 710 |
} |
| 711 |
} |
| 712 |
env->mactmp = product; |
| 713 |
FORCE_RET(); |
| 714 |
} |
| 715 |
|
| 716 |
OP(macmulf) |
| 717 |
{
|
| 718 |
int32_t op1 = get_op(PARAM1); |
| 719 |
int32_t op2 = get_op(PARAM2); |
| 720 |
uint64_t product; |
| 721 |
uint32_t remainder; |
| 722 |
|
| 723 |
product = (uint64_t)op1 * op2; |
| 724 |
if (env->macsr & MACSR_RT) {
|
| 725 |
remainder = product & 0xffffff;
|
| 726 |
product >>= 24;
|
| 727 |
if (remainder > 0x800000) |
| 728 |
product++; |
| 729 |
else if (remainder == 0x800000) |
| 730 |
product += (product & 1);
|
| 731 |
} else {
|
| 732 |
product >>= 24;
|
| 733 |
} |
| 734 |
env->mactmp = product; |
| 735 |
FORCE_RET(); |
| 736 |
} |
| 737 |
|
| 738 |
OP(macshl) |
| 739 |
{
|
| 740 |
env->mactmp <<= 1;
|
| 741 |
} |
| 742 |
|
| 743 |
OP(macshr) |
| 744 |
{
|
| 745 |
env->mactmp >>= 1;
|
| 746 |
} |
| 747 |
|
| 748 |
OP(macadd) |
| 749 |
{
|
| 750 |
int acc = PARAM1;
|
| 751 |
env->macc[acc] += env->mactmp; |
| 752 |
FORCE_RET(); |
| 753 |
} |
| 754 |
|
| 755 |
OP(macsub) |
| 756 |
{
|
| 757 |
int acc = PARAM1;
|
| 758 |
env->macc[acc] -= env->mactmp; |
| 759 |
FORCE_RET(); |
| 760 |
} |
| 761 |
|
| 762 |
OP(macsats) |
| 763 |
{
|
| 764 |
int acc = PARAM1;
|
| 765 |
int64_t sum; |
| 766 |
int64_t result; |
| 767 |
|
| 768 |
sum = env->macc[acc]; |
| 769 |
result = (sum << 16) >> 16; |
| 770 |
if (result != sum) {
|
| 771 |
env->macsr |= MACSR_V; |
| 772 |
} |
| 773 |
if (env->macsr & MACSR_V) {
|
| 774 |
env->macsr |= MACSR_PAV0 << acc; |
| 775 |
if (env->macsr & MACSR_OMC) {
|
| 776 |
/* The result is saturated to 32 bits, despite overflow occuring
|
| 777 |
at 48 bits. Seems weird, but that's what the hardware docs
|
| 778 |
say. */
|
| 779 |
result = (result >> 63) ^ 0x7fffffff; |
| 780 |
} |
| 781 |
} |
| 782 |
env->macc[acc] = result; |
| 783 |
FORCE_RET(); |
| 784 |
} |
| 785 |
|
| 786 |
OP(macsatu) |
| 787 |
{
|
| 788 |
int acc = PARAM1;
|
| 789 |
uint64_t sum; |
| 790 |
|
| 791 |
sum = env->macc[acc]; |
| 792 |
if (sum & (0xffffull << 48)) { |
| 793 |
env->macsr |= MACSR_V; |
| 794 |
} |
| 795 |
if (env->macsr & MACSR_V) {
|
| 796 |
env->macsr |= MACSR_PAV0 << acc; |
| 797 |
if (env->macsr & MACSR_OMC) {
|
| 798 |
if (sum > (1ull << 53)) |
| 799 |
sum = 0;
|
| 800 |
else
|
| 801 |
sum = (1ull << 48) - 1; |
| 802 |
} else {
|
| 803 |
sum &= ((1ull << 48) - 1); |
| 804 |
} |
| 805 |
} |
| 806 |
FORCE_RET(); |
| 807 |
} |
| 808 |
|
| 809 |
OP(macsatf) |
| 810 |
{
|
| 811 |
int acc = PARAM1;
|
| 812 |
int64_t sum; |
| 813 |
int64_t result; |
| 814 |
|
| 815 |
sum = env->macc[acc]; |
| 816 |
result = (sum << 16) >> 16; |
| 817 |
if (result != sum) {
|
| 818 |
env->macsr |= MACSR_V; |
| 819 |
} |
| 820 |
if (env->macsr & MACSR_V) {
|
| 821 |
env->macsr |= MACSR_PAV0 << acc; |
| 822 |
if (env->macsr & MACSR_OMC) {
|
| 823 |
result = (result >> 63) ^ 0x7fffffffffffll; |
| 824 |
} |
| 825 |
} |
| 826 |
env->macc[acc] = result; |
| 827 |
FORCE_RET(); |
| 828 |
} |
| 829 |
|
| 830 |
OP(mac_clear_flags) |
| 831 |
{
|
| 832 |
env->macsr &= ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV); |
| 833 |
} |
| 834 |
|
| 835 |
OP(mac_set_flags) |
| 836 |
{
|
| 837 |
int acc = PARAM1;
|
| 838 |
uint64_t val; |
| 839 |
val = env->macc[acc]; |
| 840 |
if (val == 0) |
| 841 |
env->macsr |= MACSR_Z; |
| 842 |
else if (val & (1ull << 47)); |
| 843 |
env->macsr |= MACSR_N; |
| 844 |
if (env->macsr & (MACSR_PAV0 << acc)) {
|
| 845 |
env->macsr |= MACSR_V; |
| 846 |
} |
| 847 |
if (env->macsr & MACSR_FI) {
|
| 848 |
val = ((int64_t)val) >> 40;
|
| 849 |
if (val != 0 && val != -1) |
| 850 |
env->macsr |= MACSR_EV; |
| 851 |
} else if (env->macsr & MACSR_SU) { |
| 852 |
val = ((int64_t)val) >> 32;
|
| 853 |
if (val != 0 && val != -1) |
| 854 |
env->macsr |= MACSR_EV; |
| 855 |
} else {
|
| 856 |
if ((val >> 32) != 0) |
| 857 |
env->macsr |= MACSR_EV; |
| 858 |
} |
| 859 |
FORCE_RET(); |
| 860 |
} |
| 861 |
|
| 862 |
OP(get_macf) |
| 863 |
{
|
| 864 |
int acc = PARAM2;
|
| 865 |
int64_t val; |
| 866 |
int rem;
|
| 867 |
uint32_t result; |
| 868 |
|
| 869 |
val = env->macc[acc]; |
| 870 |
if (env->macsr & MACSR_SU) {
|
| 871 |
/* 16-bit rounding. */
|
| 872 |
rem = val & 0xffffff;
|
| 873 |
val = (val >> 24) & 0xffffu; |
| 874 |
if (rem > 0x800000) |
| 875 |
val++; |
| 876 |
else if (rem == 0x800000) |
| 877 |
val += (val & 1);
|
| 878 |
} else if (env->macsr & MACSR_RT) { |
| 879 |
/* 32-bit rounding. */
|
| 880 |
rem = val & 0xff;
|
| 881 |
val >>= 8;
|
| 882 |
if (rem > 0x80) |
| 883 |
val++; |
| 884 |
else if (rem == 0x80) |
| 885 |
val += (val & 1);
|
| 886 |
} else {
|
| 887 |
/* No rounding. */
|
| 888 |
val >>= 8;
|
| 889 |
} |
| 890 |
if (env->macsr & MACSR_OMC) {
|
| 891 |
/* Saturate. */
|
| 892 |
if (env->macsr & MACSR_SU) {
|
| 893 |
if (val != (uint16_t) val) {
|
| 894 |
result = ((val >> 63) ^ 0x7fff) & 0xffff; |
| 895 |
} else {
|
| 896 |
result = val & 0xffff;
|
| 897 |
} |
| 898 |
} else {
|
| 899 |
if (val != (uint32_t)val) {
|
| 900 |
result = ((uint32_t)(val >> 63) & 0x7fffffff); |
| 901 |
} else {
|
| 902 |
result = (uint32_t)val; |
| 903 |
} |
| 904 |
} |
| 905 |
} else {
|
| 906 |
/* No saturation. */
|
| 907 |
if (env->macsr & MACSR_SU) {
|
| 908 |
result = val & 0xffff;
|
| 909 |
} else {
|
| 910 |
result = (uint32_t)val; |
| 911 |
} |
| 912 |
} |
| 913 |
set_op(PARAM1, result); |
| 914 |
FORCE_RET(); |
| 915 |
} |
| 916 |
|
| 917 |
OP(get_maci) |
| 918 |
{
|
| 919 |
int acc = PARAM2;
|
| 920 |
set_op(PARAM1, (uint32_t)env->macc[acc]); |
| 921 |
FORCE_RET(); |
| 922 |
} |
| 923 |
|
| 924 |
OP(get_macs) |
| 925 |
{
|
| 926 |
int acc = PARAM2;
|
| 927 |
int64_t val = env->macc[acc]; |
| 928 |
uint32_t result; |
| 929 |
if (val == (int32_t)val) {
|
| 930 |
result = (int32_t)val; |
| 931 |
} else {
|
| 932 |
result = (val >> 61) ^ 0x7fffffff; |
| 933 |
} |
| 934 |
set_op(PARAM1, result); |
| 935 |
FORCE_RET(); |
| 936 |
} |
| 937 |
|
| 938 |
OP(get_macu) |
| 939 |
{
|
| 940 |
int acc = PARAM2;
|
| 941 |
uint64_t val = env->macc[acc]; |
| 942 |
uint32_t result; |
| 943 |
if ((val >> 32) == 0) { |
| 944 |
result = (uint32_t)val; |
| 945 |
} else {
|
| 946 |
result = 0xffffffffu;
|
| 947 |
} |
| 948 |
set_op(PARAM1, result); |
| 949 |
FORCE_RET(); |
| 950 |
} |
| 951 |
|
| 952 |
OP(clear_mac) |
| 953 |
{
|
| 954 |
int acc = PARAM1;
|
| 955 |
|
| 956 |
env->macc[acc] = 0;
|
| 957 |
env->macsr &= ~(MACSR_PAV0 << acc); |
| 958 |
FORCE_RET(); |
| 959 |
} |
| 960 |
|
| 961 |
OP(move_mac) |
| 962 |
{
|
| 963 |
int dest = PARAM1;
|
| 964 |
int src = PARAM2;
|
| 965 |
uint32_t mask; |
| 966 |
env->macc[dest] = env->macc[src]; |
| 967 |
mask = MACSR_PAV0 << dest; |
| 968 |
if (env->macsr & (MACSR_PAV0 << src))
|
| 969 |
env->macsr |= mask; |
| 970 |
else
|
| 971 |
env->macsr &= ~mask; |
| 972 |
FORCE_RET(); |
| 973 |
} |
| 974 |
|
| 975 |
OP(get_mac_extf) |
| 976 |
{
|
| 977 |
uint32_t val; |
| 978 |
int acc = PARAM2;
|
| 979 |
val = env->macc[acc] & 0x00ff;
|
| 980 |
val = (env->macc[acc] >> 32) & 0xff00; |
| 981 |
val |= (env->macc[acc + 1] << 16) & 0x00ff0000; |
| 982 |
val |= (env->macc[acc + 1] >> 16) & 0xff000000; |
| 983 |
set_op(PARAM1, val); |
| 984 |
FORCE_RET(); |
| 985 |
} |
| 986 |
|
| 987 |
OP(get_mac_exti) |
| 988 |
{
|
| 989 |
uint32_t val; |
| 990 |
int acc = PARAM2;
|
| 991 |
val = (env->macc[acc] >> 32) & 0xffff; |
| 992 |
val |= (env->macc[acc + 1] >> 16) & 0xffff0000; |
| 993 |
set_op(PARAM1, val); |
| 994 |
FORCE_RET(); |
| 995 |
} |
| 996 |
|
| 997 |
OP(set_macf) |
| 998 |
{
|
| 999 |
int acc = PARAM2;
|
| 1000 |
int32_t val = get_op(PARAM1); |
| 1001 |
env->macc[acc] = ((int64_t)val) << 8;
|
| 1002 |
env->macsr &= ~(MACSR_PAV0 << acc); |
| 1003 |
FORCE_RET(); |
| 1004 |
} |
| 1005 |
|
| 1006 |
OP(set_macs) |
| 1007 |
{
|
| 1008 |
int acc = PARAM2;
|
| 1009 |
int32_t val = get_op(PARAM1); |
| 1010 |
env->macc[acc] = val; |
| 1011 |
env->macsr &= ~(MACSR_PAV0 << acc); |
| 1012 |
FORCE_RET(); |
| 1013 |
} |
| 1014 |
|
| 1015 |
OP(set_macu) |
| 1016 |
{
|
| 1017 |
int acc = PARAM2;
|
| 1018 |
uint32_t val = get_op(PARAM1); |
| 1019 |
env->macc[acc] = val; |
| 1020 |
env->macsr &= ~(MACSR_PAV0 << acc); |
| 1021 |
FORCE_RET(); |
| 1022 |
} |
| 1023 |
|
| 1024 |
OP(set_mac_extf) |
| 1025 |
{
|
| 1026 |
int acc = PARAM2;
|
| 1027 |
int32_t val = get_op(PARAM1); |
| 1028 |
int64_t res; |
| 1029 |
int32_t tmp; |
| 1030 |
res = env->macc[acc] & 0xffffffff00ull;
|
| 1031 |
tmp = (int16_t)(val & 0xff00);
|
| 1032 |
res |= ((int64_t)tmp) << 32;
|
| 1033 |
res |= val & 0xff;
|
| 1034 |
env->macc[acc] = res; |
| 1035 |
res = env->macc[acc + 1] & 0xffffffff00ull; |
| 1036 |
tmp = (val & 0xff000000);
|
| 1037 |
res |= ((int64_t)tmp) << 16;
|
| 1038 |
res |= (val >> 16) & 0xff; |
| 1039 |
env->macc[acc + 1] = res;
|
| 1040 |
} |
| 1041 |
|
| 1042 |
OP(set_mac_exts) |
| 1043 |
{
|
| 1044 |
int acc = PARAM2;
|
| 1045 |
int32_t val = get_op(PARAM1); |
| 1046 |
int64_t res; |
| 1047 |
int32_t tmp; |
| 1048 |
res = (uint32_t)env->macc[acc]; |
| 1049 |
tmp = (int16_t)val; |
| 1050 |
res |= ((int64_t)tmp) << 32;
|
| 1051 |
env->macc[acc] = res; |
| 1052 |
res = (uint32_t)env->macc[acc + 1];
|
| 1053 |
tmp = val & 0xffff0000;
|
| 1054 |
res |= (int64_t)tmp << 16;
|
| 1055 |
env->macc[acc + 1] = res;
|
| 1056 |
} |
| 1057 |
|
| 1058 |
OP(set_mac_extu) |
| 1059 |
{
|
| 1060 |
int acc = PARAM2;
|
| 1061 |
int32_t val = get_op(PARAM1); |
| 1062 |
uint64_t res; |
| 1063 |
res = (uint32_t)env->macc[acc]; |
| 1064 |
res |= ((uint64_t)(val & 0xffff)) << 32; |
| 1065 |
env->macc[acc] = res; |
| 1066 |
res = (uint32_t)env->macc[acc + 1];
|
| 1067 |
res |= (uint64_t)(val & 0xffff0000) << 16; |
| 1068 |
env->macc[acc + 1] = res;
|
| 1069 |
} |
| 1070 |
|
| 1071 |
OP(set_macsr) |
| 1072 |
{
|
| 1073 |
m68k_set_macsr(env, get_op(PARAM1)); |
| 1074 |
} |