git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@510 c046a42c-6fe2-441c-8c8c-71466251a162
458 lines
10 KiB
C
458 lines
10 KiB
C
/*
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* i386 micro operations (included several times to generate
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* different operand sizes)
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*
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* Copyright (c) 2003 Fabrice Bellard
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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#ifdef MEM_WRITE
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#if MEM_WRITE == 0
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#if DATA_BITS == 8
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#define MEM_SUFFIX b_raw
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#elif DATA_BITS == 16
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#define MEM_SUFFIX w_raw
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#elif DATA_BITS == 32
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#define MEM_SUFFIX l_raw
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#endif
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#elif MEM_WRITE == 1
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#if DATA_BITS == 8
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#define MEM_SUFFIX b_kernel
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#elif DATA_BITS == 16
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#define MEM_SUFFIX w_kernel
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#elif DATA_BITS == 32
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#define MEM_SUFFIX l_kernel
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#endif
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#elif MEM_WRITE == 2
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#if DATA_BITS == 8
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#define MEM_SUFFIX b_user
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#elif DATA_BITS == 16
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#define MEM_SUFFIX w_user
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#elif DATA_BITS == 32
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#define MEM_SUFFIX l_user
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#endif
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#else
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#error invalid MEM_WRITE
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#endif
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#else
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#define MEM_SUFFIX SUFFIX
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#endif
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void OPPROTO glue(glue(op_rol, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, src;
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count = T1 & SHIFT_MASK;
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if (count) {
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src = T0;
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T0 &= DATA_MASK;
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T0 = (T0 << count) | (T0 >> (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#else
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/* gcc 3.2 workaround. This is really a bug in gcc. */
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asm volatile("" : : "r" (T0));
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#endif
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CC_SRC = (cc_table[CC_OP].compute_all() & ~(CC_O | CC_C)) |
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(lshift(src ^ T0, 11 - (DATA_BITS - 1)) & CC_O) |
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(T0 & CC_C);
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CC_OP = CC_OP_EFLAGS;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_ror, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, src;
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count = T1 & SHIFT_MASK;
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if (count) {
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src = T0;
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T0 &= DATA_MASK;
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T0 = (T0 >> count) | (T0 << (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#else
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/* gcc 3.2 workaround. This is really a bug in gcc. */
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asm volatile("" : : "r" (T0));
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#endif
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CC_SRC = (cc_table[CC_OP].compute_all() & ~(CC_O | CC_C)) |
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(lshift(src ^ T0, 11 - (DATA_BITS - 1)) & CC_O) |
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((T0 >> (DATA_BITS - 1)) & CC_C);
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CC_OP = CC_OP_EFLAGS;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_rol, MEM_SUFFIX), _T0_T1)(void)
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{
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int count;
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count = T1 & SHIFT_MASK;
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if (count) {
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T0 &= DATA_MASK;
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T0 = (T0 << count) | (T0 >> (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_ror, MEM_SUFFIX), _T0_T1)(void)
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{
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int count;
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count = T1 & SHIFT_MASK;
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if (count) {
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T0 &= DATA_MASK;
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T0 = (T0 >> count) | (T0 << (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_rcl, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, res, eflags;
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unsigned int src;
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count = T1 & 0x1f;
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#if DATA_BITS == 16
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count = rclw_table[count];
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#elif DATA_BITS == 8
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count = rclb_table[count];
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#endif
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if (count) {
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eflags = cc_table[CC_OP].compute_all();
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T0 &= DATA_MASK;
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src = T0;
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res = (T0 << count) | ((eflags & CC_C) << (count - 1));
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if (count > 1)
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res |= T0 >> (DATA_BITS + 1 - count);
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T0 = res;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = (eflags & ~(CC_C | CC_O)) |
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(lshift(src ^ T0, 11 - (DATA_BITS - 1)) & CC_O) |
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((src >> (DATA_BITS - count)) & CC_C);
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CC_OP = CC_OP_EFLAGS;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_rcr, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, res, eflags;
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unsigned int src;
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count = T1 & 0x1f;
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#if DATA_BITS == 16
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count = rclw_table[count];
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#elif DATA_BITS == 8
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count = rclb_table[count];
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#endif
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if (count) {
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eflags = cc_table[CC_OP].compute_all();
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T0 &= DATA_MASK;
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src = T0;
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res = (T0 >> count) | ((eflags & CC_C) << (DATA_BITS - count));
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if (count > 1)
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res |= T0 << (DATA_BITS + 1 - count);
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T0 = res;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = (eflags & ~(CC_C | CC_O)) |
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(lshift(src ^ T0, 11 - (DATA_BITS - 1)) & CC_O) |
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((src >> (count - 1)) & CC_C);
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CC_OP = CC_OP_EFLAGS;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_shl, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, src;
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count = T1 & 0x1f;
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if (count) {
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src = (DATA_TYPE)T0 << (count - 1);
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T0 = T0 << count;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = src;
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CC_DST = T0;
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CC_OP = CC_OP_SHLB + SHIFT;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_shr, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, src;
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count = T1 & 0x1f;
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if (count) {
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T0 &= DATA_MASK;
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src = T0 >> (count - 1);
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T0 = T0 >> count;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = src;
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CC_DST = T0;
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CC_OP = CC_OP_SARB + SHIFT;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_sar, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int count, src;
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count = T1 & 0x1f;
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if (count) {
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src = (DATA_STYPE)T0;
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T0 = src >> count;
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src = src >> (count - 1);
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = src;
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CC_DST = T0;
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CC_OP = CC_OP_SARB + SHIFT;
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}
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FORCE_RET();
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}
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#if DATA_BITS == 16
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/* XXX: overflow flag might be incorrect in some cases in shldw */
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void OPPROTO glue(glue(op_shld, MEM_SUFFIX), _T0_T1_im_cc)(void)
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{
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int count;
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unsigned int res, tmp;
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count = PARAM1;
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T1 &= 0xffff;
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res = T1 | (T0 << 16);
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tmp = res >> (32 - count);
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res <<= count;
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if (count > 16)
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res |= T1 << (count - 16);
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T0 = res >> 16;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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}
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void OPPROTO glue(glue(op_shld, MEM_SUFFIX), _T0_T1_ECX_cc)(void)
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{
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int count;
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unsigned int res, tmp;
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count = ECX & 0x1f;
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if (count) {
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T1 &= 0xffff;
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res = T1 | (T0 << 16);
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tmp = res >> (32 - count);
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res <<= count;
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if (count > 16)
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res |= T1 << (count - 16);
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T0 = res >> 16;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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CC_OP = CC_OP_SARB + SHIFT;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_shrd, MEM_SUFFIX), _T0_T1_im_cc)(void)
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{
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int count;
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unsigned int res, tmp;
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count = PARAM1;
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res = (T0 & 0xffff) | (T1 << 16);
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tmp = res >> (count - 1);
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res >>= count;
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if (count > 16)
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res |= T1 << (32 - count);
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T0 = res;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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}
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void OPPROTO glue(glue(op_shrd, MEM_SUFFIX), _T0_T1_ECX_cc)(void)
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{
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int count;
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unsigned int res, tmp;
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count = ECX & 0x1f;
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if (count) {
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res = (T0 & 0xffff) | (T1 << 16);
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tmp = res >> (count - 1);
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res >>= count;
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if (count > 16)
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res |= T1 << (32 - count);
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T0 = res;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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CC_OP = CC_OP_SARB + SHIFT;
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}
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FORCE_RET();
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}
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#endif
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#if DATA_BITS == 32
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void OPPROTO glue(glue(op_shld, MEM_SUFFIX), _T0_T1_im_cc)(void)
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{
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int count, tmp;
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count = PARAM1;
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T0 &= DATA_MASK;
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T1 &= DATA_MASK;
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tmp = T0 << (count - 1);
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T0 = (T0 << count) | (T1 >> (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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}
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void OPPROTO glue(glue(op_shld, MEM_SUFFIX), _T0_T1_ECX_cc)(void)
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{
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int count, tmp;
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count = ECX & 0x1f;
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if (count) {
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T0 &= DATA_MASK;
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T1 &= DATA_MASK;
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tmp = T0 << (count - 1);
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T0 = (T0 << count) | (T1 >> (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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CC_OP = CC_OP_SHLB + SHIFT;
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}
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FORCE_RET();
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}
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void OPPROTO glue(glue(op_shrd, MEM_SUFFIX), _T0_T1_im_cc)(void)
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{
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int count, tmp;
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count = PARAM1;
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T0 &= DATA_MASK;
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T1 &= DATA_MASK;
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tmp = T0 >> (count - 1);
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T0 = (T0 >> count) | (T1 << (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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}
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void OPPROTO glue(glue(op_shrd, MEM_SUFFIX), _T0_T1_ECX_cc)(void)
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{
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int count, tmp;
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count = ECX & 0x1f;
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if (count) {
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T0 &= DATA_MASK;
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T1 &= DATA_MASK;
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tmp = T0 >> (count - 1);
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T0 = (T0 >> count) | (T1 << (DATA_BITS - count));
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = tmp;
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CC_DST = T0;
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CC_OP = CC_OP_SARB + SHIFT;
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}
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FORCE_RET();
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}
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#endif
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/* carry add/sub (we only need to set CC_OP differently) */
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void OPPROTO glue(glue(op_adc, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int cf;
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cf = cc_table[CC_OP].compute_c();
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T0 = T0 + T1 + cf;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = T1;
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CC_DST = T0;
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CC_OP = CC_OP_ADDB + SHIFT + cf * 3;
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}
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void OPPROTO glue(glue(op_sbb, MEM_SUFFIX), _T0_T1_cc)(void)
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{
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int cf;
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cf = cc_table[CC_OP].compute_c();
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T0 = T0 - T1 - cf;
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = T1;
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CC_DST = T0;
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CC_OP = CC_OP_SUBB + SHIFT + cf * 3;
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}
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void OPPROTO glue(glue(op_cmpxchg, MEM_SUFFIX), _T0_T1_EAX_cc)(void)
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{
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unsigned int src, dst;
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src = T0;
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dst = EAX - T0;
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if ((DATA_TYPE)dst == 0) {
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T0 = T1;
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} else {
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EAX = (EAX & ~DATA_MASK) | (T0 & DATA_MASK);
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}
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#ifdef MEM_WRITE
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glue(st, MEM_SUFFIX)((uint8_t *)A0, T0);
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#endif
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CC_SRC = src;
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CC_DST = dst;
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FORCE_RET();
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}
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#undef MEM_SUFFIX
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#undef MEM_WRITE
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