root / target-i386 / ops_template.h @ cad3a37d
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/*
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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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#define DATA_BITS (1 << (3 + SHIFT)) |
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#define SHIFT_MASK (DATA_BITS - 1) |
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#define SIGN_MASK (((target_ulong)1) << (DATA_BITS - 1)) |
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#if DATA_BITS <= 32 |
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#define SHIFT1_MASK 0x1f |
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#else
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#define SHIFT1_MASK 0x3f |
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#endif
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|
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#if DATA_BITS == 8 |
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#define SUFFIX b
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#define DATA_TYPE uint8_t
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#define DATA_STYPE int8_t
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#define DATA_MASK 0xff |
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#elif DATA_BITS == 16 |
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#define SUFFIX w
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#define DATA_TYPE uint16_t
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#define DATA_STYPE int16_t
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#define DATA_MASK 0xffff |
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#elif DATA_BITS == 32 |
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#define SUFFIX l
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#define DATA_TYPE uint32_t
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#define DATA_STYPE int32_t
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#define DATA_MASK 0xffffffff |
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#elif DATA_BITS == 64 |
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#define SUFFIX q
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#define DATA_TYPE uint64_t
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#define DATA_STYPE int64_t
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#define DATA_MASK 0xffffffffffffffffULL |
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#else
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#error unhandled operand size
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#endif
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/* dynamic flags computation */
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static int glue(compute_all_add, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2; |
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src1 = CC_SRC; |
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src2 = CC_DST - CC_SRC; |
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cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_add, SUFFIX)(void) |
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{
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int cf;
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target_long src1; |
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src1 = CC_SRC; |
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cf = (DATA_TYPE)CC_DST < (DATA_TYPE)src1; |
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return cf;
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} |
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static int glue(compute_all_adc, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2; |
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src1 = CC_SRC; |
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src2 = CC_DST - CC_SRC - 1;
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cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2 ^ -1) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O; |
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_adc, SUFFIX)(void) |
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{
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int cf;
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target_long src1; |
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src1 = CC_SRC; |
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cf = (DATA_TYPE)CC_DST <= (DATA_TYPE)src1; |
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return cf;
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} |
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static int glue(compute_all_sub, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_sub, SUFFIX)(void) |
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{
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int cf;
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 < (DATA_TYPE)src2; |
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return cf;
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} |
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static int glue(compute_all_sbb, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC + 1;
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = lshift((src1 ^ src2) & (src1 ^ CC_DST), 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_sbb, SUFFIX)(void) |
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{
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int cf;
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC + 1;
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src2 = CC_SRC; |
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cf = (DATA_TYPE)src1 <= (DATA_TYPE)src2; |
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return cf;
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} |
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static int glue(compute_all_logic, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = 0;
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = 0;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_logic, SUFFIX)(void) |
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{
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return 0; |
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} |
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static int glue(compute_all_inc, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2; |
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src1 = CC_DST - 1;
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src2 = 1;
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cf = CC_SRC; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = ((CC_DST & DATA_MASK) == SIGN_MASK) << 11;
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return cf | pf | af | zf | sf | of;
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} |
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#if DATA_BITS == 32 |
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static int glue(compute_c_inc, SUFFIX)(void) |
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{
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return CC_SRC;
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} |
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#endif
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static int glue(compute_all_dec, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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target_long src1, src2; |
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src1 = CC_DST + 1;
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src2 = 1;
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cf = CC_SRC; |
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pf = parity_table[(uint8_t)CC_DST]; |
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af = (CC_DST ^ src1 ^ src2) & 0x10;
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = ((CC_DST & DATA_MASK) == ((target_ulong)SIGN_MASK - 1)) << 11; |
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_all_shl, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = (CC_SRC >> (DATA_BITS - 1)) & CC_C;
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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/* of is defined if shift count == 1 */
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of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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static int glue(compute_c_shl, SUFFIX)(void) |
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{
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return (CC_SRC >> (DATA_BITS - 1)) & CC_C; |
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} |
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|
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#if DATA_BITS == 32 |
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static int glue(compute_c_sar, SUFFIX)(void) |
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{
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return CC_SRC & 1; |
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} |
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#endif
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static int glue(compute_all_sar, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = CC_SRC & 1;
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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/* of is defined if shift count == 1 */
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of = lshift(CC_SRC ^ CC_DST, 12 - DATA_BITS) & CC_O;
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return cf | pf | af | zf | sf | of;
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} |
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|
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#if DATA_BITS == 32 |
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static int glue(compute_c_mul, SUFFIX)(void) |
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{
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int cf;
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cf = (CC_SRC != 0);
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return cf;
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} |
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#endif
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/* NOTE: we compute the flags like the P4. On olders CPUs, only OF and
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CF are modified and it is slower to do that. */
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static int glue(compute_all_mul, SUFFIX)(void) |
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{
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int cf, pf, af, zf, sf, of;
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cf = (CC_SRC != 0);
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pf = parity_table[(uint8_t)CC_DST]; |
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af = 0; /* undefined */ |
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zf = ((DATA_TYPE)CC_DST == 0) << 6; |
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sf = lshift(CC_DST, 8 - DATA_BITS) & 0x80; |
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of = cf << 11;
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return cf | pf | af | zf | sf | of;
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} |
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|
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/* various optimized jumps cases */
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void OPPROTO glue(op_jb_sub, SUFFIX)(void) |
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{
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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if ((DATA_TYPE)src1 < (DATA_TYPE)src2)
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jz_sub, SUFFIX)(void) |
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{
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if ((DATA_TYPE)CC_DST == 0) |
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jnz_sub, SUFFIX)(void) |
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{
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if ((DATA_TYPE)CC_DST != 0) |
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jbe_sub, SUFFIX)(void) |
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{
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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|
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if ((DATA_TYPE)src1 <= (DATA_TYPE)src2)
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_js_sub, SUFFIX)(void) |
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{
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if (CC_DST & SIGN_MASK)
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jl_sub, SUFFIX)(void) |
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{
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
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|
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if ((DATA_STYPE)src1 < (DATA_STYPE)src2)
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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void OPPROTO glue(op_jle_sub, SUFFIX)(void) |
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{
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target_long src1, src2; |
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src1 = CC_DST + CC_SRC; |
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src2 = CC_SRC; |
| 330 |
|
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if ((DATA_STYPE)src1 <= (DATA_STYPE)src2)
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
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} |
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|
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/* oldies */
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|
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#if DATA_BITS >= 16 |
| 339 |
|
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void OPPROTO glue(op_loopnz, SUFFIX)(void) |
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{
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if ((DATA_TYPE)ECX != 0 && !(T0 & CC_Z)) |
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GOTO_LABEL_PARAM(1);
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FORCE_RET(); |
| 345 |
} |
| 346 |
|
| 347 |
void OPPROTO glue(op_loopz, SUFFIX)(void) |
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{
|
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if ((DATA_TYPE)ECX != 0 && (T0 & CC_Z)) |
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GOTO_LABEL_PARAM(1);
|
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FORCE_RET(); |
| 352 |
} |
| 353 |
|
| 354 |
void OPPROTO glue(op_jz_ecx, SUFFIX)(void) |
| 355 |
{
|
| 356 |
if ((DATA_TYPE)ECX == 0) |
| 357 |
GOTO_LABEL_PARAM(1);
|
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FORCE_RET(); |
| 359 |
} |
| 360 |
|
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void OPPROTO glue(op_jnz_ecx, SUFFIX)(void) |
| 362 |
{
|
| 363 |
if ((DATA_TYPE)ECX != 0) |
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GOTO_LABEL_PARAM(1);
|
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FORCE_RET(); |
| 366 |
} |
| 367 |
|
| 368 |
#endif
|
| 369 |
|
| 370 |
/* various optimized set cases */
|
| 371 |
|
| 372 |
void OPPROTO glue(op_setb_T0_sub, SUFFIX)(void) |
| 373 |
{
|
| 374 |
target_long src1, src2; |
| 375 |
src1 = CC_DST + CC_SRC; |
| 376 |
src2 = CC_SRC; |
| 377 |
|
| 378 |
T0 = ((DATA_TYPE)src1 < (DATA_TYPE)src2); |
| 379 |
} |
| 380 |
|
| 381 |
void OPPROTO glue(op_setz_T0_sub, SUFFIX)(void) |
| 382 |
{
|
| 383 |
T0 = ((DATA_TYPE)CC_DST == 0);
|
| 384 |
} |
| 385 |
|
| 386 |
void OPPROTO glue(op_setbe_T0_sub, SUFFIX)(void) |
| 387 |
{
|
| 388 |
target_long src1, src2; |
| 389 |
src1 = CC_DST + CC_SRC; |
| 390 |
src2 = CC_SRC; |
| 391 |
|
| 392 |
T0 = ((DATA_TYPE)src1 <= (DATA_TYPE)src2); |
| 393 |
} |
| 394 |
|
| 395 |
void OPPROTO glue(op_sets_T0_sub, SUFFIX)(void) |
| 396 |
{
|
| 397 |
T0 = lshift(CC_DST, -(DATA_BITS - 1)) & 1; |
| 398 |
} |
| 399 |
|
| 400 |
void OPPROTO glue(op_setl_T0_sub, SUFFIX)(void) |
| 401 |
{
|
| 402 |
target_long src1, src2; |
| 403 |
src1 = CC_DST + CC_SRC; |
| 404 |
src2 = CC_SRC; |
| 405 |
|
| 406 |
T0 = ((DATA_STYPE)src1 < (DATA_STYPE)src2); |
| 407 |
} |
| 408 |
|
| 409 |
void OPPROTO glue(op_setle_T0_sub, SUFFIX)(void) |
| 410 |
{
|
| 411 |
target_long src1, src2; |
| 412 |
src1 = CC_DST + CC_SRC; |
| 413 |
src2 = CC_SRC; |
| 414 |
|
| 415 |
T0 = ((DATA_STYPE)src1 <= (DATA_STYPE)src2); |
| 416 |
} |
| 417 |
|
| 418 |
/* bit operations */
|
| 419 |
#if DATA_BITS >= 16 |
| 420 |
|
| 421 |
void OPPROTO glue(glue(op_bt, SUFFIX), _T0_T1_cc)(void) |
| 422 |
{
|
| 423 |
int count;
|
| 424 |
count = T1 & SHIFT_MASK; |
| 425 |
CC_SRC = T0 >> count; |
| 426 |
} |
| 427 |
|
| 428 |
void OPPROTO glue(glue(op_bts, SUFFIX), _T0_T1_cc)(void) |
| 429 |
{
|
| 430 |
int count;
|
| 431 |
count = T1 & SHIFT_MASK; |
| 432 |
T1 = T0 >> count; |
| 433 |
T0 |= (((target_long)1) << count);
|
| 434 |
} |
| 435 |
|
| 436 |
void OPPROTO glue(glue(op_btr, SUFFIX), _T0_T1_cc)(void) |
| 437 |
{
|
| 438 |
int count;
|
| 439 |
count = T1 & SHIFT_MASK; |
| 440 |
T1 = T0 >> count; |
| 441 |
T0 &= ~(((target_long)1) << count);
|
| 442 |
} |
| 443 |
|
| 444 |
void OPPROTO glue(glue(op_btc, SUFFIX), _T0_T1_cc)(void) |
| 445 |
{
|
| 446 |
int count;
|
| 447 |
count = T1 & SHIFT_MASK; |
| 448 |
T1 = T0 >> count; |
| 449 |
T0 ^= (((target_long)1) << count);
|
| 450 |
} |
| 451 |
|
| 452 |
void OPPROTO glue(glue(op_add_bit, SUFFIX), _A0_T1)(void) |
| 453 |
{
|
| 454 |
A0 += ((DATA_STYPE)T1 >> (3 + SHIFT)) << SHIFT;
|
| 455 |
} |
| 456 |
|
| 457 |
void OPPROTO glue(glue(op_bsf, SUFFIX), _T0_cc)(void) |
| 458 |
{
|
| 459 |
int count;
|
| 460 |
target_long res; |
| 461 |
|
| 462 |
res = T0 & DATA_MASK; |
| 463 |
if (res != 0) { |
| 464 |
count = 0;
|
| 465 |
while ((res & 1) == 0) { |
| 466 |
count++; |
| 467 |
res >>= 1;
|
| 468 |
} |
| 469 |
T1 = count; |
| 470 |
CC_DST = 1; /* ZF = 0 */ |
| 471 |
} else {
|
| 472 |
CC_DST = 0; /* ZF = 1 */ |
| 473 |
} |
| 474 |
FORCE_RET(); |
| 475 |
} |
| 476 |
|
| 477 |
void OPPROTO glue(glue(op_bsr, SUFFIX), _T0_cc)(void) |
| 478 |
{
|
| 479 |
int count;
|
| 480 |
target_long res; |
| 481 |
|
| 482 |
res = T0 & DATA_MASK; |
| 483 |
if (res != 0) { |
| 484 |
count = DATA_BITS - 1;
|
| 485 |
while ((res & SIGN_MASK) == 0) { |
| 486 |
count--; |
| 487 |
res <<= 1;
|
| 488 |
} |
| 489 |
T1 = count; |
| 490 |
CC_DST = 1; /* ZF = 0 */ |
| 491 |
} else {
|
| 492 |
CC_DST = 0; /* ZF = 1 */ |
| 493 |
} |
| 494 |
FORCE_RET(); |
| 495 |
} |
| 496 |
|
| 497 |
#endif
|
| 498 |
|
| 499 |
#if DATA_BITS == 32 |
| 500 |
void OPPROTO op_update_bt_cc(void) |
| 501 |
{
|
| 502 |
CC_SRC = T1; |
| 503 |
} |
| 504 |
#endif
|
| 505 |
|
| 506 |
/* string operations */
|
| 507 |
|
| 508 |
void OPPROTO glue(op_movl_T0_Dshift, SUFFIX)(void) |
| 509 |
{
|
| 510 |
T0 = DF << SHIFT; |
| 511 |
} |
| 512 |
|
| 513 |
#undef DATA_BITS
|
| 514 |
#undef SHIFT_MASK
|
| 515 |
#undef SHIFT1_MASK
|
| 516 |
#undef SIGN_MASK
|
| 517 |
#undef DATA_TYPE
|
| 518 |
#undef DATA_STYPE
|
| 519 |
#undef DATA_MASK
|
| 520 |
#undef SUFFIX
|