On 13.01.2017 13:52, Laurent Vivier wrote: > On 680x0 family only. > > Address Register indirect With postincrement: > > When using the stack pointer (A7) with byte size data, the register > is incremented by two. > > Address Register indirect With predecrement: > > When using the stack pointer (A7) with byte size data, the register > is decremented by two. > > Signed-off-by: Laurent Vivier <laur...@vivier.eu> > --- > target/m68k/translate.c | 14 ++++++++++++-- > 1 file changed, 12 insertions(+), 2 deletions(-) > > diff --git a/target/m68k/translate.c b/target/m68k/translate.c > index cf5d8dd..727c189 100644 > --- a/target/m68k/translate.c > +++ b/target/m68k/translate.c > @@ -725,7 +725,12 @@ static TCGv gen_lea_mode(CPUM68KState *env, DisasContext > *s, > } > reg = get_areg(s, reg0); > tmp = tcg_temp_new(); > - tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize)); > + if (reg0 == 7 && opsize == OS_BYTE && > + m68k_feature(s->env, M68K_FEATURE_M68000)) { > + tcg_gen_subi_i32(tmp, reg, 2); > + } else { > + tcg_gen_subi_i32(tmp, reg, opsize_bytes(opsize)); > + } > return tmp; > case 5: /* Indirect displacement. */ > reg = get_areg(s, reg0); > @@ -801,7 +806,12 @@ static TCGv gen_ea_mode(CPUM68KState *env, DisasContext > *s, int mode, int reg0, > result = gen_ldst(s, opsize, reg, val, what); > if (what == EA_STORE || !addrp) { > TCGv tmp = tcg_temp_new(); > - tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize)); > + if (reg0 == 7 && opsize == OS_BYTE && > + m68k_feature(s->env, M68K_FEATURE_M68000)) { > + tcg_gen_subi_i32(tmp, reg, 2); > + } else { > + tcg_gen_addi_i32(tmp, reg, opsize_bytes(opsize)); > + } > delay_set_areg(s, reg0, tmp, true); > } > return result; >
Reviewed-by: Thomas Huth <h...@tuxfamily.org>