root / target-m68k / op.c @ a7037b29
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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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#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 >= 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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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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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 glue(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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|
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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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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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|
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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(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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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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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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/* 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(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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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); |
329 |
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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{ |
341 |
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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num = env->div1; |
357 |
den = env->div2; |
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/* ??? This needs to make sure the throwing location is accurate. */
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if (den == 0) |
360 |
RAISE_EXCEPTION(EXCP_DIV0); |
361 |
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; |
369 |
if (quot == 0) |
370 |
flags |= CCF_Z; |
371 |
else if ((int32_t)quot < 0) |
372 |
flags |= CCF_N; |
373 |
env->div1 = quot; |
374 |
env->div2 = rem; |
375 |
env->cc_dest = flags; |
376 |
FORCE_RET(); |
377 |
} |
378 |
|
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OP(divs) |
380 |
{ |
381 |
int32_t num; |
382 |
int32_t den; |
383 |
int32_t quot; |
384 |
int32_t rem; |
385 |
int32_t flags; |
386 |
|
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num = env->div1; |
388 |
den = env->div2; |
389 |
if (den == 0) |
390 |
RAISE_EXCEPTION(EXCP_DIV0); |
391 |
quot = num / den; |
392 |
rem = num % den; |
393 |
flags = 0;
|
394 |
if (PARAM1 == 2 && quot != (int16_t)quot) |
395 |
flags |= CCF_V; |
396 |
if (quot == 0) |
397 |
flags |= CCF_Z; |
398 |
else if (quot < 0) |
399 |
flags |= CCF_N; |
400 |
env->div1 = quot; |
401 |
env->div2 = rem; |
402 |
env->cc_dest = flags; |
403 |
FORCE_RET(); |
404 |
} |
405 |
|
406 |
/* Halt is special because it may be a semihosting call. */
|
407 |
OP(halt) |
408 |
{ |
409 |
RAISE_EXCEPTION(EXCP_HALT_INSN); |
410 |
FORCE_RET(); |
411 |
} |
412 |
|
413 |
OP(stop) |
414 |
{ |
415 |
env->halted = 1;
|
416 |
RAISE_EXCEPTION(EXCP_HLT); |
417 |
FORCE_RET(); |
418 |
} |
419 |
|
420 |
OP(raise_exception) |
421 |
{ |
422 |
RAISE_EXCEPTION(PARAM1); |
423 |
FORCE_RET(); |
424 |
} |
425 |
|
426 |
/* Floating point comparison sets flags differently to other instructions. */
|
427 |
|
428 |
OP(sub_cmpf64) |
429 |
{ |
430 |
float64 src0; |
431 |
float64 src1; |
432 |
src0 = get_opf64(PARAM2); |
433 |
src1 = get_opf64(PARAM3); |
434 |
set_opf64(PARAM1, helper_sub_cmpf64(env, src0, src1)); |
435 |
FORCE_RET(); |
436 |
} |
437 |
|
438 |
OP(update_xflag_tst) |
439 |
{ |
440 |
uint32_t op1 = get_op(PARAM1); |
441 |
env->cc_x = op1; |
442 |
FORCE_RET(); |
443 |
} |
444 |
|
445 |
OP(update_xflag_lt) |
446 |
{ |
447 |
uint32_t op1 = get_op(PARAM1); |
448 |
uint32_t op2 = get_op(PARAM2); |
449 |
env->cc_x = (op1 < op2); |
450 |
FORCE_RET(); |
451 |
} |
452 |
|
453 |
OP(get_xflag) |
454 |
{ |
455 |
set_op(PARAM1, env->cc_x); |
456 |
FORCE_RET(); |
457 |
} |
458 |
|
459 |
OP(logic_cc) |
460 |
{ |
461 |
uint32_t op1 = get_op(PARAM1); |
462 |
env->cc_dest = op1; |
463 |
FORCE_RET(); |
464 |
} |
465 |
|
466 |
OP(update_cc_add) |
467 |
{ |
468 |
uint32_t op1 = get_op(PARAM1); |
469 |
uint32_t op2 = get_op(PARAM2); |
470 |
env->cc_dest = op1; |
471 |
env->cc_src = op2; |
472 |
FORCE_RET(); |
473 |
} |
474 |
|
475 |
OP(fp_result) |
476 |
{ |
477 |
env->fp_result = get_opf64(PARAM1); |
478 |
FORCE_RET(); |
479 |
} |
480 |
|
481 |
OP(jmp) |
482 |
{ |
483 |
GOTO_LABEL_PARAM(1);
|
484 |
} |
485 |
|
486 |
/* These ops involve a function call, which probably requires a stack frame
|
487 |
and breaks things on some hosts. */
|
488 |
OP(jmp_z32) |
489 |
{ |
490 |
uint32_t arg = get_op(PARAM1); |
491 |
if (arg == 0) |
492 |
GOTO_LABEL_PARAM(2);
|
493 |
FORCE_RET(); |
494 |
} |
495 |
|
496 |
OP(jmp_nz32) |
497 |
{ |
498 |
uint32_t arg = get_op(PARAM1); |
499 |
if (arg != 0) |
500 |
GOTO_LABEL_PARAM(2);
|
501 |
FORCE_RET(); |
502 |
} |
503 |
|
504 |
OP(jmp_s32) |
505 |
{ |
506 |
int32_t arg = get_op(PARAM1); |
507 |
if (arg < 0) |
508 |
GOTO_LABEL_PARAM(2);
|
509 |
FORCE_RET(); |
510 |
} |
511 |
|
512 |
OP(jmp_ns32) |
513 |
{ |
514 |
int32_t arg = get_op(PARAM1); |
515 |
if (arg >= 0) |
516 |
GOTO_LABEL_PARAM(2);
|
517 |
FORCE_RET(); |
518 |
} |
519 |
|
520 |
void OPPROTO op_goto_tb0(void) |
521 |
{ |
522 |
GOTO_TB(op_goto_tb0, PARAM1, 0);
|
523 |
} |
524 |
|
525 |
void OPPROTO op_goto_tb1(void) |
526 |
{ |
527 |
GOTO_TB(op_goto_tb1, PARAM1, 1);
|
528 |
} |
529 |
|
530 |
OP(exit_tb) |
531 |
{ |
532 |
EXIT_TB(); |
533 |
} |
534 |
|
535 |
|
536 |
/* Floating point. */
|
537 |
OP(f64_to_i32) |
538 |
{ |
539 |
set_op(PARAM1, float64_to_int32(get_opf64(PARAM2), &CPU_FP_STATUS)); |
540 |
FORCE_RET(); |
541 |
} |
542 |
|
543 |
OP(f64_to_f32) |
544 |
{ |
545 |
union {
|
546 |
float32 f; |
547 |
uint32_t i; |
548 |
} u; |
549 |
u.f = float64_to_float32(get_opf64(PARAM2), &CPU_FP_STATUS); |
550 |
set_op(PARAM1, u.i); |
551 |
FORCE_RET(); |
552 |
} |
553 |
|
554 |
OP(i32_to_f64) |
555 |
{ |
556 |
set_opf64(PARAM1, int32_to_float64(get_op(PARAM2), &CPU_FP_STATUS)); |
557 |
FORCE_RET(); |
558 |
} |
559 |
|
560 |
OP(f32_to_f64) |
561 |
{ |
562 |
union {
|
563 |
float32 f; |
564 |
uint32_t i; |
565 |
} u; |
566 |
u.i = get_op(PARAM2); |
567 |
set_opf64(PARAM1, float32_to_float64(u.f, &CPU_FP_STATUS)); |
568 |
FORCE_RET(); |
569 |
} |
570 |
|
571 |
OP(absf64) |
572 |
{ |
573 |
float64 op0 = get_opf64(PARAM2); |
574 |
set_opf64(PARAM1, float64_abs(op0)); |
575 |
FORCE_RET(); |
576 |
} |
577 |
|
578 |
OP(chsf64) |
579 |
{ |
580 |
float64 op0 = get_opf64(PARAM2); |
581 |
set_opf64(PARAM1, float64_chs(op0)); |
582 |
FORCE_RET(); |
583 |
} |
584 |
|
585 |
OP(sqrtf64) |
586 |
{ |
587 |
float64 op0 = get_opf64(PARAM2); |
588 |
set_opf64(PARAM1, float64_sqrt(op0, &CPU_FP_STATUS)); |
589 |
FORCE_RET(); |
590 |
} |
591 |
|
592 |
OP(addf64) |
593 |
{ |
594 |
float64 op0 = get_opf64(PARAM2); |
595 |
float64 op1 = get_opf64(PARAM3); |
596 |
set_opf64(PARAM1, float64_add(op0, op1, &CPU_FP_STATUS)); |
597 |
FORCE_RET(); |
598 |
} |
599 |
|
600 |
OP(subf64) |
601 |
{ |
602 |
float64 op0 = get_opf64(PARAM2); |
603 |
float64 op1 = get_opf64(PARAM3); |
604 |
set_opf64(PARAM1, float64_sub(op0, op1, &CPU_FP_STATUS)); |
605 |
FORCE_RET(); |
606 |
} |
607 |
|
608 |
OP(mulf64) |
609 |
{ |
610 |
float64 op0 = get_opf64(PARAM2); |
611 |
float64 op1 = get_opf64(PARAM3); |
612 |
set_opf64(PARAM1, float64_mul(op0, op1, &CPU_FP_STATUS)); |
613 |
FORCE_RET(); |
614 |
} |
615 |
|
616 |
OP(divf64) |
617 |
{ |
618 |
float64 op0 = get_opf64(PARAM2); |
619 |
float64 op1 = get_opf64(PARAM3); |
620 |
set_opf64(PARAM1, float64_div(op0, op1, &CPU_FP_STATUS)); |
621 |
FORCE_RET(); |
622 |
} |
623 |
|
624 |
OP(iround_f64) |
625 |
{ |
626 |
float64 op0 = get_opf64(PARAM2); |
627 |
set_opf64(PARAM1, float64_round_to_int(op0, &CPU_FP_STATUS)); |
628 |
FORCE_RET(); |
629 |
} |
630 |
|
631 |
OP(itrunc_f64) |
632 |
{ |
633 |
float64 op0 = get_opf64(PARAM2); |
634 |
set_opf64(PARAM1, float64_trunc_to_int(op0, &CPU_FP_STATUS)); |
635 |
FORCE_RET(); |
636 |
} |
637 |
|
638 |
OP(compare_quietf64) |
639 |
{ |
640 |
float64 op0 = get_opf64(PARAM2); |
641 |
float64 op1 = get_opf64(PARAM3); |
642 |
set_op(PARAM1, float64_compare_quiet(op0, op1, &CPU_FP_STATUS)); |
643 |
FORCE_RET(); |
644 |
} |
645 |
|
646 |
OP(movec) |
647 |
{ |
648 |
int op1 = get_op(PARAM1);
|
649 |
uint32_t op2 = get_op(PARAM2); |
650 |
helper_movec(env, op1, op2); |
651 |
} |
652 |
|
653 |
/* Memory access. */
|
654 |
|
655 |
#define MEMSUFFIX _raw
|
656 |
#include "op_mem.h" |
657 |
|
658 |
#if !defined(CONFIG_USER_ONLY)
|
659 |
#define MEMSUFFIX _user
|
660 |
#include "op_mem.h" |
661 |
#define MEMSUFFIX _kernel
|
662 |
#include "op_mem.h" |
663 |
#endif
|
664 |
|
665 |
/* MAC unit. */
|
666 |
/* TODO: The MAC instructions use 64-bit arithmetic fairly extensively.
|
667 |
This results in fairly large ops (and sometimes other issues) on 32-bit
|
668 |
hosts. Maybe move most of them into helpers. */
|
669 |
OP(macmuls) |
670 |
{ |
671 |
uint32_t op1 = get_op(PARAM1); |
672 |
uint32_t op2 = get_op(PARAM2); |
673 |
int64_t product; |
674 |
int64_t res; |
675 |
|
676 |
product = (uint64_t)op1 * op2; |
677 |
res = (product << 24) >> 24; |
678 |
if (res != product) {
|
679 |
env->macsr |= MACSR_V; |
680 |
if (env->macsr & MACSR_OMC) {
|
681 |
/* Make sure the accumulate operation overflows. */
|
682 |
if (product < 0) |
683 |
res = ~(1ll << 50); |
684 |
else
|
685 |
res = 1ll << 50; |
686 |
} |
687 |
} |
688 |
env->mactmp = res; |
689 |
FORCE_RET(); |
690 |
} |
691 |
|
692 |
OP(macmulu) |
693 |
{ |
694 |
uint32_t op1 = get_op(PARAM1); |
695 |
uint32_t op2 = get_op(PARAM2); |
696 |
uint64_t product; |
697 |
|
698 |
product = (uint64_t)op1 * op2; |
699 |
if (product & (0xffffffull << 40)) { |
700 |
env->macsr |= MACSR_V; |
701 |
if (env->macsr & MACSR_OMC) {
|
702 |
/* Make sure the accumulate operation overflows. */
|
703 |
product = 1ll << 50; |
704 |
} else {
|
705 |
product &= ((1ull << 40) - 1); |
706 |
} |
707 |
} |
708 |
env->mactmp = product; |
709 |
FORCE_RET(); |
710 |
} |
711 |
|
712 |
OP(macmulf) |
713 |
{ |
714 |
int32_t op1 = get_op(PARAM1); |
715 |
int32_t op2 = get_op(PARAM2); |
716 |
uint64_t product; |
717 |
uint32_t remainder; |
718 |
|
719 |
product = (uint64_t)op1 * op2; |
720 |
if (env->macsr & MACSR_RT) {
|
721 |
remainder = product & 0xffffff;
|
722 |
product >>= 24;
|
723 |
if (remainder > 0x800000) |
724 |
product++; |
725 |
else if (remainder == 0x800000) |
726 |
product += (product & 1);
|
727 |
} else {
|
728 |
product >>= 24;
|
729 |
} |
730 |
env->mactmp = product; |
731 |
FORCE_RET(); |
732 |
} |
733 |
|
734 |
OP(macshl) |
735 |
{ |
736 |
env->mactmp <<= 1;
|
737 |
} |
738 |
|
739 |
OP(macshr) |
740 |
{ |
741 |
env->mactmp >>= 1;
|
742 |
} |
743 |
|
744 |
OP(macadd) |
745 |
{ |
746 |
int acc = PARAM1;
|
747 |
env->macc[acc] += env->mactmp; |
748 |
FORCE_RET(); |
749 |
} |
750 |
|
751 |
OP(macsub) |
752 |
{ |
753 |
int acc = PARAM1;
|
754 |
env->macc[acc] -= env->mactmp; |
755 |
FORCE_RET(); |
756 |
} |
757 |
|
758 |
OP(macsats) |
759 |
{ |
760 |
int acc = PARAM1;
|
761 |
int64_t sum; |
762 |
int64_t result; |
763 |
|
764 |
sum = env->macc[acc]; |
765 |
result = (sum << 16) >> 16; |
766 |
if (result != sum) {
|
767 |
env->macsr |= MACSR_V; |
768 |
} |
769 |
if (env->macsr & MACSR_V) {
|
770 |
env->macsr |= MACSR_PAV0 << acc; |
771 |
if (env->macsr & MACSR_OMC) {
|
772 |
/* The result is saturated to 32 bits, despite overflow occuring
|
773 |
at 48 bits. Seems weird, but that's what the hardware docs
|
774 |
say. */
|
775 |
result = (result >> 63) ^ 0x7fffffff; |
776 |
} |
777 |
} |
778 |
env->macc[acc] = result; |
779 |
FORCE_RET(); |
780 |
} |
781 |
|
782 |
OP(macsatu) |
783 |
{ |
784 |
int acc = PARAM1;
|
785 |
uint64_t sum; |
786 |
|
787 |
sum = env->macc[acc]; |
788 |
if (sum & (0xffffull << 48)) { |
789 |
env->macsr |= MACSR_V; |
790 |
} |
791 |
if (env->macsr & MACSR_V) {
|
792 |
env->macsr |= MACSR_PAV0 << acc; |
793 |
if (env->macsr & MACSR_OMC) {
|
794 |
if (sum > (1ull << 53)) |
795 |
sum = 0;
|
796 |
else
|
797 |
sum = (1ull << 48) - 1; |
798 |
} else {
|
799 |
sum &= ((1ull << 48) - 1); |
800 |
} |
801 |
} |
802 |
FORCE_RET(); |
803 |
} |
804 |
|
805 |
OP(macsatf) |
806 |
{ |
807 |
int acc = PARAM1;
|
808 |
int64_t sum; |
809 |
int64_t result; |
810 |
|
811 |
sum = env->macc[acc]; |
812 |
result = (sum << 16) >> 16; |
813 |
if (result != sum) {
|
814 |
env->macsr |= MACSR_V; |
815 |
} |
816 |
if (env->macsr & MACSR_V) {
|
817 |
env->macsr |= MACSR_PAV0 << acc; |
818 |
if (env->macsr & MACSR_OMC) {
|
819 |
result = (result >> 63) ^ 0x7fffffffffffll; |
820 |
} |
821 |
} |
822 |
env->macc[acc] = result; |
823 |
FORCE_RET(); |
824 |
} |
825 |
|
826 |
OP(mac_clear_flags) |
827 |
{ |
828 |
env->macsr &= ~(MACSR_V | MACSR_Z | MACSR_N | MACSR_EV); |
829 |
} |
830 |
|
831 |
OP(mac_set_flags) |
832 |
{ |
833 |
int acc = PARAM1;
|
834 |
uint64_t val; |
835 |
val = env->macc[acc]; |
836 |
if (val == 0) |
837 |
env->macsr |= MACSR_Z; |
838 |
else if (val & (1ull << 47)); |
839 |
env->macsr |= MACSR_N; |
840 |
if (env->macsr & (MACSR_PAV0 << acc)) {
|
841 |
env->macsr |= MACSR_V; |
842 |
} |
843 |
if (env->macsr & MACSR_FI) {
|
844 |
val = ((int64_t)val) >> 40;
|
845 |
if (val != 0 && val != -1) |
846 |
env->macsr |= MACSR_EV; |
847 |
} else if (env->macsr & MACSR_SU) { |
848 |
val = ((int64_t)val) >> 32;
|
849 |
if (val != 0 && val != -1) |
850 |
env->macsr |= MACSR_EV; |
851 |
} else {
|
852 |
if ((val >> 32) != 0) |
853 |
env->macsr |= MACSR_EV; |
854 |
} |
855 |
FORCE_RET(); |
856 |
} |
857 |
|
858 |
OP(get_macf) |
859 |
{ |
860 |
int acc = PARAM2;
|
861 |
int64_t val; |
862 |
int rem;
|
863 |
uint32_t result; |
864 |
|
865 |
val = env->macc[acc]; |
866 |
if (env->macsr & MACSR_SU) {
|
867 |
/* 16-bit rounding. */
|
868 |
rem = val & 0xffffff;
|
869 |
val = (val >> 24) & 0xffffu; |
870 |
if (rem > 0x800000) |
871 |
val++; |
872 |
else if (rem == 0x800000) |
873 |
val += (val & 1);
|
874 |
} else if (env->macsr & MACSR_RT) { |
875 |
/* 32-bit rounding. */
|
876 |
rem = val & 0xff;
|
877 |
val >>= 8;
|
878 |
if (rem > 0x80) |
879 |
val++; |
880 |
else if (rem == 0x80) |
881 |
val += (val & 1);
|
882 |
} else {
|
883 |
/* No rounding. */
|
884 |
val >>= 8;
|
885 |
} |
886 |
if (env->macsr & MACSR_OMC) {
|
887 |
/* Saturate. */
|
888 |
if (env->macsr & MACSR_SU) {
|
889 |
if (val != (uint16_t) val) {
|
890 |
result = ((val >> 63) ^ 0x7fff) & 0xffff; |
891 |
} else {
|
892 |
result = val & 0xffff;
|
893 |
} |
894 |
} else {
|
895 |
if (val != (uint32_t)val) {
|
896 |
result = ((uint32_t)(val >> 63) & 0x7fffffff); |
897 |
} else {
|
898 |
result = (uint32_t)val; |
899 |
} |
900 |
} |
901 |
} else {
|
902 |
/* No saturation. */
|
903 |
if (env->macsr & MACSR_SU) {
|
904 |
result = val & 0xffff;
|
905 |
} else {
|
906 |
result = (uint32_t)val; |
907 |
} |
908 |
} |
909 |
set_op(PARAM1, result); |
910 |
FORCE_RET(); |
911 |
} |
912 |
|
913 |
OP(get_maci) |
914 |
{ |
915 |
int acc = PARAM2;
|
916 |
set_op(PARAM1, (uint32_t)env->macc[acc]); |
917 |
FORCE_RET(); |
918 |
} |
919 |
|
920 |
OP(get_macs) |
921 |
{ |
922 |
int acc = PARAM2;
|
923 |
int64_t val = env->macc[acc]; |
924 |
uint32_t result; |
925 |
if (val == (int32_t)val) {
|
926 |
result = (int32_t)val; |
927 |
} else {
|
928 |
result = (val >> 61) ^ 0x7fffffff; |
929 |
} |
930 |
set_op(PARAM1, result); |
931 |
FORCE_RET(); |
932 |
} |
933 |
|
934 |
OP(get_macu) |
935 |
{ |
936 |
int acc = PARAM2;
|
937 |
uint64_t val = env->macc[acc]; |
938 |
uint32_t result; |
939 |
if ((val >> 32) == 0) { |
940 |
result = (uint32_t)val; |
941 |
} else {
|
942 |
result = 0xffffffffu;
|
943 |
} |
944 |
set_op(PARAM1, result); |
945 |
FORCE_RET(); |
946 |
} |
947 |
|
948 |
OP(clear_mac) |
949 |
{ |
950 |
int acc = PARAM1;
|
951 |
|
952 |
env->macc[acc] = 0;
|
953 |
env->macsr &= ~(MACSR_PAV0 << acc); |
954 |
FORCE_RET(); |
955 |
} |
956 |
|
957 |
OP(move_mac) |
958 |
{ |
959 |
int dest = PARAM1;
|
960 |
int src = PARAM2;
|
961 |
uint32_t mask; |
962 |
env->macc[dest] = env->macc[src]; |
963 |
mask = MACSR_PAV0 << dest; |
964 |
if (env->macsr & (MACSR_PAV0 << src))
|
965 |
env->macsr |= mask; |
966 |
else
|
967 |
env->macsr &= ~mask; |
968 |
FORCE_RET(); |
969 |
} |
970 |
|
971 |
OP(get_mac_extf) |
972 |
{ |
973 |
uint32_t val; |
974 |
int acc = PARAM2;
|
975 |
val = env->macc[acc] & 0x00ff;
|
976 |
val = (env->macc[acc] >> 32) & 0xff00; |
977 |
val |= (env->macc[acc + 1] << 16) & 0x00ff0000; |
978 |
val |= (env->macc[acc + 1] >> 16) & 0xff000000; |
979 |
set_op(PARAM1, val); |
980 |
FORCE_RET(); |
981 |
} |
982 |
|
983 |
OP(get_mac_exti) |
984 |
{ |
985 |
uint32_t val; |
986 |
int acc = PARAM2;
|
987 |
val = (env->macc[acc] >> 32) & 0xffff; |
988 |
val |= (env->macc[acc + 1] >> 16) & 0xffff0000; |
989 |
set_op(PARAM1, val); |
990 |
FORCE_RET(); |
991 |
} |
992 |
|
993 |
OP(set_macf) |
994 |
{ |
995 |
int acc = PARAM2;
|
996 |
int32_t val = get_op(PARAM1); |
997 |
env->macc[acc] = ((int64_t)val) << 8;
|
998 |
env->macsr &= ~(MACSR_PAV0 << acc); |
999 |
FORCE_RET(); |
1000 |
} |
1001 |
|
1002 |
OP(set_macs) |
1003 |
{ |
1004 |
int acc = PARAM2;
|
1005 |
int32_t val = get_op(PARAM1); |
1006 |
env->macc[acc] = val; |
1007 |
env->macsr &= ~(MACSR_PAV0 << acc); |
1008 |
FORCE_RET(); |
1009 |
} |
1010 |
|
1011 |
OP(set_macu) |
1012 |
{ |
1013 |
int acc = PARAM2;
|
1014 |
uint32_t val = get_op(PARAM1); |
1015 |
env->macc[acc] = val; |
1016 |
env->macsr &= ~(MACSR_PAV0 << acc); |
1017 |
FORCE_RET(); |
1018 |
} |
1019 |
|
1020 |
OP(set_mac_extf) |
1021 |
{ |
1022 |
int acc = PARAM2;
|
1023 |
int32_t val = get_op(PARAM1); |
1024 |
int64_t res; |
1025 |
int32_t tmp; |
1026 |
res = env->macc[acc] & 0xffffffff00ull;
|
1027 |
tmp = (int16_t)(val & 0xff00);
|
1028 |
res |= ((int64_t)tmp) << 32;
|
1029 |
res |= val & 0xff;
|
1030 |
env->macc[acc] = res; |
1031 |
res = env->macc[acc + 1] & 0xffffffff00ull; |
1032 |
tmp = (val & 0xff000000);
|
1033 |
res |= ((int64_t)tmp) << 16;
|
1034 |
res |= (val >> 16) & 0xff; |
1035 |
env->macc[acc + 1] = res;
|
1036 |
} |
1037 |
|
1038 |
OP(set_mac_exts) |
1039 |
{ |
1040 |
int acc = PARAM2;
|
1041 |
int32_t val = get_op(PARAM1); |
1042 |
int64_t res; |
1043 |
int32_t tmp; |
1044 |
res = (uint32_t)env->macc[acc]; |
1045 |
tmp = (int16_t)val; |
1046 |
res |= ((int64_t)tmp) << 32;
|
1047 |
env->macc[acc] = res; |
1048 |
res = (uint32_t)env->macc[acc + 1];
|
1049 |
tmp = val & 0xffff0000;
|
1050 |
res |= (int64_t)tmp << 16;
|
1051 |
env->macc[acc + 1] = res;
|
1052 |
} |
1053 |
|
1054 |
OP(set_mac_extu) |
1055 |
{ |
1056 |
int acc = PARAM2;
|
1057 |
int32_t val = get_op(PARAM1); |
1058 |
uint64_t res; |
1059 |
res = (uint32_t)env->macc[acc]; |
1060 |
res |= ((uint64_t)(val & 0xffff)) << 32; |
1061 |
env->macc[acc] = res; |
1062 |
res = (uint32_t)env->macc[acc + 1];
|
1063 |
res |= (uint64_t)(val & 0xffff0000) << 16; |
1064 |
env->macc[acc + 1] = res;
|
1065 |
} |
1066 |
|
1067 |
OP(set_macsr) |
1068 |
{ |
1069 |
m68k_set_macsr(env, get_op(PARAM1)); |
1070 |
} |