mirror of https://gitee.com/openkylin/qemu.git
lm32: use lookup table for opcodes
Instead of a for loop use a faster lookup table. Signed-off-by: Michael Walle <michael@walle.cc> Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>
This commit is contained in:
Michael Walle
Edgar E. Iglesias
parent
fcda98630b
commit
a5086f9542
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@ -1,78 +0,0 @@
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/*
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* LatticeMico32 instruction decoding macros.
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*
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* Copyright (c) 2010 Michael Walle <michael@walle.cc>
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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, see <http://www.gnu.org/licenses/>.
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*/
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/* Convenient binary macros */
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#define HEX__(n) 0x##n##LU
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#define B8__(x) (((x&0x0000000FLU) ? 1 : 0) \
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+ ((x&0x000000F0LU) ? 2 : 0) \
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+ ((x&0x00000F00LU) ? 4 : 0) \
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+ ((x&0x0000F000LU) ? 8 : 0) \
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+ ((x&0x000F0000LU) ? 16 : 0) \
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+ ((x&0x00F00000LU) ? 32 : 0) \
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+ ((x&0x0F000000LU) ? 64 : 0) \
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+ ((x&0xF0000000LU) ? 128 : 0))
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#define B8(d) ((unsigned char)B8__(HEX__(d)))
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/* Decode logic, value and mask. */
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#define DEC_ADD {B8(00001101), B8(00011111)}
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#define DEC_AND {B8(00001000), B8(00011111)}
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#define DEC_ANDHI {B8(00011000), B8(00111111)}
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#define DEC_B {B8(00110000), B8(00111111)}
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#define DEC_BI {B8(00111000), B8(00111111)}
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#define DEC_BE {B8(00010001), B8(00111111)}
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#define DEC_BG {B8(00010010), B8(00111111)}
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#define DEC_BGE {B8(00010011), B8(00111111)}
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#define DEC_BGEU {B8(00010100), B8(00111111)}
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#define DEC_BGU {B8(00010101), B8(00111111)}
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#define DEC_BNE {B8(00010111), B8(00111111)}
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#define DEC_CALL {B8(00110110), B8(00111111)}
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#define DEC_CALLI {B8(00111110), B8(00111111)}
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#define DEC_CMPE {B8(00011001), B8(00011111)}
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#define DEC_CMPG {B8(00011010), B8(00011111)}
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#define DEC_CMPGE {B8(00011011), B8(00011111)}
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#define DEC_CMPGEU {B8(00011100), B8(00011111)}
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#define DEC_CMPGU {B8(00011101), B8(00011111)}
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#define DEC_CMPNE {B8(00011111), B8(00011111)}
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#define DEC_DIVU {B8(00100011), B8(00111111)}
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#define DEC_LB {B8(00000100), B8(00111111)}
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#define DEC_LBU {B8(00010000), B8(00111111)}
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#define DEC_LH {B8(00000111), B8(00111111)}
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#define DEC_LHU {B8(00001011), B8(00111111)}
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#define DEC_LW {B8(00001010), B8(00111111)}
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#define DEC_MODU {B8(00110001), B8(00111111)}
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#define DEC_MUL {B8(00000010), B8(00011111)}
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#define DEC_NOR {B8(00000001), B8(00011111)}
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#define DEC_OR {B8(00001110), B8(00011111)}
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#define DEC_ORHI {B8(00011110), B8(00111111)}
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#define DEC_SCALL {B8(00101011), B8(00111111)}
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#define DEC_RCSR {B8(00100100), B8(00111111)}
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#define DEC_SB {B8(00001100), B8(00111111)}
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#define DEC_SEXTB {B8(00101100), B8(00111111)}
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#define DEC_SEXTH {B8(00110111), B8(00111111)}
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#define DEC_SH {B8(00000011), B8(00111111)}
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#define DEC_SL {B8(00001111), B8(00011111)}
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#define DEC_SR {B8(00000101), B8(00011111)}
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#define DEC_SRU {B8(00000000), B8(00011111)}
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#define DEC_SUB {B8(00110010), B8(00111111)}
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#define DEC_SW {B8(00010110), B8(00111111)}
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#define DEC_USER {B8(00110011), B8(00111111)}
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#define DEC_WCSR {B8(00110100), B8(00111111)}
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#define DEC_XNOR {B8(00001001), B8(00011111)}
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#define DEC_XOR {B8(00000110), B8(00011111)}
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@ -29,7 +29,6 @@
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#include "disas.h"
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#include "helper.h"
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#include "tcg-op.h"
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#include "lm32-decode.h"
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#include "qemu-common.h"
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#include "hw/lm32_pic.h"
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@ -963,66 +962,28 @@ static void dec_xor(DisasContext *dc)
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}
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}
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typedef struct {
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struct {
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uint32_t bits;
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uint32_t mask;
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};
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void (*dec)(DisasContext *dc);
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} DecoderInfo;
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static void dec_ill(DisasContext *dc)
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{
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cpu_abort(dc->env, "unknown opcode 0x%02x\n", dc->opcode);
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}
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typedef void (*DecoderInfo)(DisasContext *dc);
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static const DecoderInfo decinfo[] = {
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{DEC_ADD, dec_add},
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{DEC_AND, dec_and},
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{DEC_ANDHI, dec_andhi},
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{DEC_B, dec_b},
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{DEC_BI, dec_bi},
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{DEC_BE, dec_be},
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{DEC_BG, dec_bg},
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{DEC_BGE, dec_bge},
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{DEC_BGEU, dec_bgeu},
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{DEC_BGU, dec_bgu},
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{DEC_BNE, dec_bne},
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{DEC_CALL, dec_call},
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{DEC_CALLI, dec_calli},
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{DEC_CMPE, dec_cmpe},
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{DEC_CMPG, dec_cmpg},
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{DEC_CMPGE, dec_cmpge},
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{DEC_CMPGEU, dec_cmpgeu},
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{DEC_CMPGU, dec_cmpgu},
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{DEC_CMPNE, dec_cmpne},
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{DEC_DIVU, dec_divu},
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{DEC_LB, dec_lb},
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{DEC_LBU, dec_lbu},
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{DEC_LH, dec_lh},
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{DEC_LHU, dec_lhu},
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{DEC_LW, dec_lw},
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{DEC_MODU, dec_modu},
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{DEC_MUL, dec_mul},
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{DEC_NOR, dec_nor},
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{DEC_OR, dec_or},
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{DEC_ORHI, dec_orhi},
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{DEC_SCALL, dec_scall},
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{DEC_RCSR, dec_rcsr},
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{DEC_SB, dec_sb},
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{DEC_SEXTB, dec_sextb},
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{DEC_SEXTH, dec_sexth},
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{DEC_SH, dec_sh},
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{DEC_SL, dec_sl},
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{DEC_SR, dec_sr},
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{DEC_SRU, dec_sru},
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{DEC_SUB, dec_sub},
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{DEC_SW, dec_sw},
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{DEC_USER, dec_user},
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{DEC_WCSR, dec_wcsr},
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{DEC_XNOR, dec_xnor},
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{DEC_XOR, dec_xor},
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dec_sru, dec_nor, dec_mul, dec_sh, dec_lb, dec_sr, dec_xor, dec_lh,
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dec_and, dec_xnor, dec_lw, dec_lhu, dec_sb, dec_add, dec_or, dec_sl,
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dec_lbu, dec_be, dec_bg, dec_bge, dec_bgeu, dec_bgu, dec_sw, dec_bne,
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dec_andhi, dec_cmpe, dec_cmpg, dec_cmpge, dec_cmpgeu, dec_cmpgu, dec_orhi,
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dec_cmpne,
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dec_sru, dec_nor, dec_mul, dec_divu, dec_rcsr, dec_sr, dec_xor, dec_ill,
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dec_and, dec_xnor, dec_ill, dec_scall, dec_sextb, dec_add, dec_or, dec_sl,
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dec_b, dec_modu, dec_sub, dec_user, dec_wcsr, dec_ill, dec_call, dec_sexth,
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dec_bi, dec_cmpe, dec_cmpg, dec_cmpge, dec_cmpgeu, dec_cmpgu, dec_calli,
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dec_cmpne
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};
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static inline void decode(DisasContext *dc)
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{
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uint32_t ir;
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int i;
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if (unlikely(qemu_loglevel_mask(CPU_LOG_TB_OP))) {
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tcg_gen_debug_insn_start(dc->pc);
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@ -1061,15 +1022,10 @@ static inline void decode(DisasContext *dc)
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dc->format = OP_FMT_RI;
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}
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/* Large switch for all insns. */
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for (i = 0; i < ARRAY_SIZE(decinfo); i++) {
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if ((dc->opcode & decinfo[i].mask) == decinfo[i].bits) {
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decinfo[i].dec(dc);
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return;
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}
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}
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assert(ARRAY_SIZE(decinfo) == 64);
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assert(dc->opcode < 64);
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cpu_abort(dc->env, "unknown opcode 0x%02x\n", dc->opcode);
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decinfo[dc->opcode](dc);
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}
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static void check_breakpoint(CPUState *env, DisasContext *dc)
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