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体验新版 GitCode,发现更多精彩内容 >>
提交
f49f1ae7
编写于
10月 14, 2016
作者:
R
Richard Henderson
浏览文件
操作
浏览文件
下载
电子邮件补丁
差异文件
target-alpha: Use deposit and extract ops
Signed-off-by:
N
Richard Henderson
<
rth@twiddle.net
>
上级
752b1be9
变更
1
隐藏空白更改
内联
并排
Showing
1 changed file
with
42 addition
and
25 deletion
+42
-25
target/alpha/translate.c
target/alpha/translate.c
+42
-25
未找到文件。
target/alpha/translate.c
浏览文件 @
f49f1ae7
...
...
@@ -949,7 +949,13 @@ static void gen_ext_h(DisasContext *ctx, TCGv vc, TCGv va, int rb, bool islit,
uint8_t
lit
,
uint8_t
byte_mask
)
{
if
(
islit
)
{
tcg_gen_shli_i64
(
vc
,
va
,
(
64
-
lit
*
8
)
&
0x3f
);
int
pos
=
(
64
-
lit
*
8
)
&
0x3f
;
int
len
=
cto32
(
byte_mask
)
*
8
;
if
(
pos
<
len
)
{
tcg_gen_deposit_z_i64
(
vc
,
va
,
pos
,
len
-
pos
);
}
else
{
tcg_gen_movi_i64
(
vc
,
0
);
}
}
else
{
TCGv
tmp
=
tcg_temp_new
();
tcg_gen_shli_i64
(
tmp
,
load_gpr
(
ctx
,
rb
),
3
);
...
...
@@ -966,38 +972,44 @@ static void gen_ext_l(DisasContext *ctx, TCGv vc, TCGv va, int rb, bool islit,
uint8_t
lit
,
uint8_t
byte_mask
)
{
if
(
islit
)
{
tcg_gen_shri_i64
(
vc
,
va
,
(
lit
&
7
)
*
8
);
int
pos
=
(
lit
&
7
)
*
8
;
int
len
=
cto32
(
byte_mask
)
*
8
;
if
(
pos
+
len
>=
64
)
{
len
=
64
-
pos
;
}
tcg_gen_extract_i64
(
vc
,
va
,
pos
,
len
);
}
else
{
TCGv
tmp
=
tcg_temp_new
();
tcg_gen_andi_i64
(
tmp
,
load_gpr
(
ctx
,
rb
),
7
);
tcg_gen_shli_i64
(
tmp
,
tmp
,
3
);
tcg_gen_shr_i64
(
vc
,
va
,
tmp
);
tcg_temp_free
(
tmp
);
gen_zapnoti
(
vc
,
vc
,
byte_mask
);
}
gen_zapnoti
(
vc
,
vc
,
byte_mask
);
}
/* INSWH, INSLH, INSQH */
static
void
gen_ins_h
(
DisasContext
*
ctx
,
TCGv
vc
,
TCGv
va
,
int
rb
,
bool
islit
,
uint8_t
lit
,
uint8_t
byte_mask
)
{
TCGv
tmp
=
tcg_temp_new
();
/* The instruction description has us left-shift the byte mask and extract
bits <15:8> and apply that zap at the end. This is equivalent to simply
performing the zap first and shifting afterward. */
gen_zapnoti
(
tmp
,
va
,
byte_mask
);
if
(
islit
)
{
lit
&=
7
;
if
(
unlikely
(
lit
==
0
))
{
tcg_gen_movi_i64
(
vc
,
0
);
int
pos
=
64
-
(
lit
&
7
)
*
8
;
int
len
=
cto32
(
byte_mask
)
*
8
;
if
(
pos
<
len
)
{
tcg_gen_extract_i64
(
vc
,
va
,
pos
,
len
-
pos
);
}
else
{
tcg_gen_
shri_i64
(
vc
,
tmp
,
64
-
lit
*
8
);
tcg_gen_
movi_i64
(
vc
,
0
);
}
}
else
{
TCGv
tmp
=
tcg_temp_new
();
TCGv
shift
=
tcg_temp_new
();
/* The instruction description has us left-shift the byte mask
and extract bits <15:8> and apply that zap at the end. This
is equivalent to simply performing the zap first and shifting
afterward. */
gen_zapnoti
(
tmp
,
va
,
byte_mask
);
/* If (B & 7) == 0, we need to shift by 64 and leave a zero. Do this
portably by splitting the shift into two parts: shift_count-1 and 1.
Arrange for the -1 by using ones-complement instead of
...
...
@@ -1010,32 +1022,37 @@ static void gen_ins_h(DisasContext *ctx, TCGv vc, TCGv va, int rb, bool islit,
tcg_gen_shr_i64
(
vc
,
tmp
,
shift
);
tcg_gen_shri_i64
(
vc
,
vc
,
1
);
tcg_temp_free
(
shift
);
tcg_temp_free
(
tmp
);
}
tcg_temp_free
(
tmp
);
}
/* INSBL, INSWL, INSLL, INSQL */
static
void
gen_ins_l
(
DisasContext
*
ctx
,
TCGv
vc
,
TCGv
va
,
int
rb
,
bool
islit
,
uint8_t
lit
,
uint8_t
byte_mask
)
{
TCGv
tmp
=
tcg_temp_new
();
/* The instruction description has us left-shift the byte mask
the same number of byte slots as the data and apply the zap
at the end. This is equivalent to simply performing the zap
first and shifting afterward. */
gen_zapnoti
(
tmp
,
va
,
byte_mask
);
if
(
islit
)
{
tcg_gen_shli_i64
(
vc
,
tmp
,
(
lit
&
7
)
*
8
);
int
pos
=
(
lit
&
7
)
*
8
;
int
len
=
cto32
(
byte_mask
)
*
8
;
if
(
pos
+
len
>
64
)
{
len
=
64
-
pos
;
}
tcg_gen_deposit_z_i64
(
vc
,
va
,
pos
,
len
);
}
else
{
TCGv
tmp
=
tcg_temp_new
();
TCGv
shift
=
tcg_temp_new
();
/* The instruction description has us left-shift the byte mask
and extract bits <15:8> and apply that zap at the end. This
is equivalent to simply performing the zap first and shifting
afterward. */
gen_zapnoti
(
tmp
,
va
,
byte_mask
);
tcg_gen_andi_i64
(
shift
,
load_gpr
(
ctx
,
rb
),
7
);
tcg_gen_shli_i64
(
shift
,
shift
,
3
);
tcg_gen_shl_i64
(
vc
,
tmp
,
shift
);
tcg_temp_free
(
shift
);
tcg_temp_free
(
tmp
);
}
tcg_temp_free
(
tmp
);
}
/* MSKWH, MSKLH, MSKQH */
...
...
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