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target-m68k: Use setcond for scc

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Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Laurent Vivier <laurent@vivier.eu>
This commit is contained in:
Richard Henderson 2015-08-14 07:59:22 -07:00 committed by Laurent Vivier
parent 6a432295d7
commit b459e3eccf
1 changed files with 11 additions and 9 deletions

20
target-m68k/translate.c

@ -865,19 +865,21 @@ static void gen_jmpcc(DisasContext *s, int cond, TCGLabel *l1)
DISAS_INSN(scc)
{
TCGLabel *l1;
DisasCompare c;
int cond;
TCGv reg;
TCGv reg, tmp;
l1 = gen_new_label();
cond = (insn >> 8) & 0xf;
gen_cc_cond(&c, s, cond);
tmp = tcg_temp_new();
tcg_gen_setcond_i32(c.tcond, tmp, c.v1, c.v2);
free_cond(&c);
reg = DREG(insn, 0);
tcg_gen_andi_i32(reg, reg, 0xffffff00);
/* This is safe because we modify the reg directly, with no other values
live. */
gen_jmpcc(s, cond ^ 1, l1);
tcg_gen_ori_i32(reg, reg, 0xff);
gen_set_label(l1);
tcg_gen_neg_i32(tmp, tmp);
tcg_gen_deposit_i32(reg, reg, tmp, 0, 8);
tcg_temp_free(tmp);
}
/* Force a TB lookup after an instruction that changes the CPU state. */