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Immediate versions of ro[lr]

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6968 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
malc 2009-04-02 22:54:35 +00:00
parent d19076faca
commit 8cd6345d00
1 changed files with 83 additions and 1 deletions
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84
target-i386/translate.c
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@ -1551,7 +1551,6 @@ static inline void tcg_gen_lshift(TCGv ret, TCGv arg1, target_long arg2)
tcg_gen_shri_tl(ret, arg1, -arg2);
}
/* XXX: add faster immediate case */
static void gen_rot_rm_T1(DisasContext *s, int ot, int op1,
int is_right)
{
@ -1648,6 +1647,83 @@ static void gen_rot_rm_T1(DisasContext *s, int ot, int op1,
tcg_temp_free(a0);
}
static void gen_rot_rm_im(DisasContext *s, int ot, int op1, int op2,
int is_right)
{
int mask;
int data_bits;
TCGv t0, t1, a0;
/* XXX: inefficient, but we must use local temps */
t0 = tcg_temp_local_new();
t1 = tcg_temp_local_new();
a0 = tcg_temp_local_new();
if (ot == OT_QUAD)
mask = 0x3f;
else
mask = 0x1f;
/* load */
if (op1 == OR_TMP0) {
tcg_gen_mov_tl(a0, cpu_A0);
gen_op_ld_v(ot + s->mem_index, t0, a0);
} else {
gen_op_mov_v_reg(ot, t0, op1);
}
gen_extu(ot, t0);
tcg_gen_mov_tl(t1, t0);
op2 &= mask;
data_bits = 8 << ot;
if (op2 != 0) {
int shift = op2 & ((1 << (3 + ot)) - 1);
if (is_right) {
tcg_gen_shri_tl(cpu_tmp4, t0, shift);
tcg_gen_shli_tl(t0, t0, data_bits - shift);
}
else {
tcg_gen_shli_tl(cpu_tmp4, t0, shift);
tcg_gen_shri_tl(t0, t0, data_bits - shift);
}
tcg_gen_or_tl(t0, t0, cpu_tmp4);
}
/* store */
if (op1 == OR_TMP0) {
gen_op_st_v(ot + s->mem_index, t0, a0);
} else {
gen_op_mov_reg_v(ot, op1, t0);
}
if (op2 != 0) {
/* update eflags */
if (s->cc_op != CC_OP_DYNAMIC)
gen_op_set_cc_op(s->cc_op);
gen_compute_eflags(cpu_cc_src);
tcg_gen_andi_tl(cpu_cc_src, cpu_cc_src, ~(CC_O | CC_C));
tcg_gen_xor_tl(cpu_tmp0, t1, t0);
tcg_gen_lshift(cpu_tmp0, cpu_tmp0, 11 - (data_bits - 1));
tcg_gen_andi_tl(cpu_tmp0, cpu_tmp0, CC_O);
tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, cpu_tmp0);
if (is_right) {
tcg_gen_shri_tl(t0, t0, data_bits - 1);
}
tcg_gen_andi_tl(t0, t0, CC_C);
tcg_gen_or_tl(cpu_cc_src, cpu_cc_src, t0);
tcg_gen_discard_tl(cpu_cc_dst);
tcg_gen_movi_i32(cpu_cc_op, CC_OP_EFLAGS);
s->cc_op = CC_OP_EFLAGS;
}
tcg_temp_free(t0);
tcg_temp_free(t1);
tcg_temp_free(a0);
}
/* XXX: add faster immediate = 1 case */
static void gen_rotc_rm_T1(DisasContext *s, int ot, int op1,
int is_right)
@ -1862,6 +1938,12 @@ static void gen_shift(DisasContext *s1, int op, int ot, int d, int s)
static void gen_shifti(DisasContext *s1, int op, int ot, int d, int c)
{
switch(op) {
case OP_ROL:
gen_rot_rm_im(s1, ot, d, c, 0);
break;
case OP_ROR:
gen_rot_rm_im(s1, ot, d, c, 1);
break;
case OP_SHL:
case OP_SHL1:
gen_shift_rm_im(s1, ot, d, c, 0, 0);