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tcg-i386: Tidy unary arithmetic. 

Define OPC_GRP3 and EXT3_FOO to match.  Use them instead of
bare constants.

Define OPC_GRP5 and rename the existing EXT_BAR to EXT5_BAR to
make it clear which extension should be used with which opcode.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-05-21 08:30:30 -07:00 committed by Aurelien Jarno
parent 32a8ffb970
commit 9363dedbbb
1 changed files with 25 additions and 13 deletions
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38
tcg/i386/tcg-target.c
View File

@ -190,7 +190,11 @@ static inline int tcg_target_const_match(tcg_target_long val,
#define OPC_SHIFT_cl (0xd3)
#define OPC_TESTL (0x85)
/* Group 1 opcode extensions for 0x80-0x83. */
#define OPC_GRP3_Ev (0xf7)
#define OPC_GRP5 (0xff)
/* Group 1 opcode extensions for 0x80-0x83.
These are also used as modifiers for OPC_ARITH. */
#define ARITH_ADD 0
#define ARITH_OR 1
#define ARITH_ADC 2
@ -207,9 +211,17 @@ static inline int tcg_target_const_match(tcg_target_long val,
#define SHIFT_SHR 5
#define SHIFT_SAR 7
/* Group 5 opcode extensions for 0xff. */
#define EXT_CALLN_Ev 2
#define EXT_JMPN_Ev 4
/* Group 3 opcode extensions for 0xf6, 0xf7. To be used with OPC_GRP3. */
#define EXT3_NOT 2
#define EXT3_NEG 3
#define EXT3_MUL 4
#define EXT3_IMUL 5
#define EXT3_DIV 6
#define EXT3_IDIV 7
/* Group 5 opcode extensions for 0xff. To be used with OPC_GRP5. */
#define EXT5_CALLN_Ev 2
#define EXT5_JMPN_Ev 4
/* Condition codes to be added to OPC_JCC_{long,short}. */
#define JCC_JMP (-1)
@ -1060,7 +1072,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
tcg_out32(s, 0);
} else {
/* indirect jump method */
tcg_out_modrm_offset(s, 0xff, EXT_JMPN_Ev, -1,
tcg_out_modrm_offset(s, OPC_GRP5, EXT5_JMPN_Ev, -1,
(tcg_target_long)(s->tb_next + args[0]));
}
s->tb_next_offset[args[0]] = s->code_ptr - s->code_buf;
@ -1070,7 +1082,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
tcg_out_calli(s, args[0]);
} else {
/* call *reg */
tcg_out_modrm(s, 0xff, EXT_CALLN_Ev, args[0]);
tcg_out_modrm(s, OPC_GRP5, EXT5_CALLN_Ev, args[0]);
}
break;
case INDEX_op_jmp:
@ -1079,7 +1091,7 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
tcg_out32(s, args[0] - (tcg_target_long)s->code_ptr - 4);
} else {
/* jmp *reg */
tcg_out_modrm(s, 0xff, EXT_JMPN_Ev, args[0]);
tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, args[0]);
}
break;
case INDEX_op_br:
@ -1156,13 +1168,13 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
}
break;
case INDEX_op_mulu2_i32:
tcg_out_modrm(s, 0xf7, 4, args[3]);
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_MUL, args[3]);
break;
case INDEX_op_div2_i32:
tcg_out_modrm(s, 0xf7, 7, args[4]);
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_IDIV, args[4]);
break;
case INDEX_op_divu2_i32:
tcg_out_modrm(s, 0xf7, 6, args[4]);
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_DIV, args[4]);
break;
case INDEX_op_shl_i32:
c = SHIFT_SHL;
@ -1226,11 +1238,11 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
break;
case INDEX_op_neg_i32:
tcg_out_modrm(s, 0xf7, 3, args[0]);
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_NEG, args[0]);
break;
case INDEX_op_not_i32:
tcg_out_modrm(s, 0xf7, 2, args[0]);
tcg_out_modrm(s, OPC_GRP3_Ev, EXT3_NOT, args[0]);
break;
case INDEX_op_ext8s_i32:
@ -1398,7 +1410,7 @@ void tcg_target_qemu_prologue(TCGContext *s)
stack_addend = frame_size - push_size;
tcg_out_addi(s, TCG_REG_ESP, -stack_addend);
tcg_out_modrm(s, 0xff, EXT_JMPN_Ev, TCG_REG_EAX); /* jmp *%eax */
tcg_out_modrm(s, OPC_GRP5, EXT5_JMPN_Ev, TCG_REG_EAX); /* jmp *%eax */
/* TB epilogue */
tb_ret_addr = s->code_ptr;