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target-m68k: add exg ops 

Suggested-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Laurent Vivier 2016-01-16 23:05:55 +01:00
parent c630e436c0
commit 29cf437da4
1 changed files with 30 additions and 0 deletions
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30
target-m68k/translate.c
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@ -2021,6 +2021,33 @@ DISAS_INSN(eor)
DEST_EA(env, insn, OS_LONG, dest, &addr);
}
static void do_exg(TCGv reg1, TCGv reg2)
{
TCGv temp = tcg_temp_new();
tcg_gen_mov_i32(temp, reg1);
tcg_gen_mov_i32(reg1, reg2);
tcg_gen_mov_i32(reg2, temp);
tcg_temp_free(temp);
}
DISAS_INSN(exg_aa)
{
/* exchange Dx and Dy */
do_exg(DREG(insn, 9), DREG(insn, 0));
}
DISAS_INSN(exg_dd)
{
/* exchange Ax and Ay */
do_exg(AREG(insn, 9), AREG(insn, 0));
}
DISAS_INSN(exg_da)
{
/* exchange Dx and Ay */
do_exg(DREG(insn, 9), AREG(insn, 0));
}
DISAS_INSN(and)
{
TCGv src;
@ -3154,6 +3181,9 @@ void register_m68k_insns (CPUM68KState *env)
INSN(cmpa, b0c0, f0c0, M68000);
INSN(eor, b180, f1c0, CF_ISA_A);
BASE(and, c000, f000);
INSN(exg_dd, c140, f1f8, M68000);
INSN(exg_aa, c148, f1f8, M68000);
INSN(exg_da, c188, f1f8, M68000);
BASE(mulw, c0c0, f0c0);
BASE(addsub, d000, f000);
INSN(addx, d180, f1f8, CF_ISA_A);