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tcg-aarch64: Support deposit

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Also tidy the implementation of ubfm, sbfm, extr in order to share code.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Claudio Fontana <claudio.fontana@huawei.com>
Tested-by: Claudio Fontana <claudio.fontana@huawei.com>
This commit is contained in:
Richard Henderson 2013-08-14 13:05:07 -07:00
parent ed7a0aa8bc
commit b3c56df769
2 changed files with 49 additions and 21 deletions
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66
tcg/aarch64/tcg-target.c
View File

@ -269,6 +269,14 @@ typedef enum {
I3401_SUBI = 0x51000000,
I3401_SUBSI = 0x71000000,
/* Bitfield instructions. */
I3402_BFM = 0x33000000,
I3402_SBFM = 0x13000000,
I3402_UBFM = 0x53000000,
/* Extract instruction. */
I3403_EXTR = 0x13800000,
/* Logical immediate instructions. */
I3404_ANDI = 0x12000000,
I3404_ORRI = 0x32000000,
@ -409,6 +417,13 @@ static void tcg_out_insn_3402(TCGContext *s, AArch64Insn insn, TCGType ext,
#define tcg_out_insn_3404 tcg_out_insn_3402
static void tcg_out_insn_3403(TCGContext *s, AArch64Insn insn, TCGType ext,
TCGReg rd, TCGReg rn, TCGReg rm, int imms)
{
tcg_out32(s, insn | ext << 31 | ext << 22 | rm << 16 | imms << 10
| rn << 5 | rd);
}
/* This function is for both 3.5.2 (Add/Subtract shifted register), for
the rare occasion when we actually want to supply a shift amount. */
static inline void tcg_out_insn_3502S(TCGContext *s, AArch64Insn insn,
@ -575,36 +590,35 @@ static inline void tcg_out_mul(TCGContext *s, TCGType ext,
tcg_out32(s, base | rm << 16 | rn << 5 | rd);
}
static inline void tcg_out_bfm(TCGContext *s, TCGType ext, TCGReg rd,
TCGReg rn, unsigned int a, unsigned int b)
{
tcg_out_insn(s, 3402, BFM, ext, rd, rn, ext, a, b);
}
static inline void tcg_out_ubfm(TCGContext *s, TCGType ext, TCGReg rd,
TCGReg rn, unsigned int a, unsigned int b)
{
/* Using UBFM 0x53000000 Wd, Wn, a, b */
unsigned int base = ext ? 0xd3400000 : 0x53000000;
tcg_out32(s, base | a << 16 | b << 10 | rn << 5 | rd);
tcg_out_insn(s, 3402, UBFM, ext, rd, rn, ext, a, b);
}
static inline void tcg_out_sbfm(TCGContext *s, TCGType ext, TCGReg rd,
TCGReg rn, unsigned int a, unsigned int b)
{
/* Using SBFM 0x13000000 Wd, Wn, a, b */
unsigned int base = ext ? 0x93400000 : 0x13000000;
tcg_out32(s, base | a << 16 | b << 10 | rn << 5 | rd);
tcg_out_insn(s, 3402, SBFM, ext, rd, rn, ext, a, b);
}
static inline void tcg_out_extr(TCGContext *s, TCGType ext, TCGReg rd,
TCGReg rn, TCGReg rm, unsigned int a)
{
/* Using EXTR 0x13800000 Wd, Wn, Wm, a */
unsigned int base = ext ? 0x93c00000 : 0x13800000;
tcg_out32(s, base | rm << 16 | a << 10 | rn << 5 | rd);
tcg_out_insn(s, 3403, EXTR, ext, rd, rn, rm, a);
}
static inline void tcg_out_shl(TCGContext *s, TCGType ext,
TCGReg rd, TCGReg rn, unsigned int m)
{
int bits, max;
bits = ext ? 64 : 32;
max = bits - 1;
int bits = ext ? 64 : 32;
int max = bits - 1;
tcg_out_ubfm(s, ext, rd, rn, bits - (m & max), max - (m & max));
}
@ -632,12 +646,20 @@ static inline void tcg_out_rotr(TCGContext *s, TCGType ext,
static inline void tcg_out_rotl(TCGContext *s, TCGType ext,
TCGReg rd, TCGReg rn, unsigned int m)
{
int bits, max;
bits = ext ? 64 : 32;
max = bits - 1;
int bits = ext ? 64 : 32;
int max = bits - 1;
tcg_out_extr(s, ext, rd, rn, rn, bits - (m & max));
}
static inline void tcg_out_dep(TCGContext *s, TCGType ext, TCGReg rd,
TCGReg rn, unsigned lsb, unsigned width)
{
unsigned size = ext ? 64 : 32;
unsigned a = (size - lsb) & (size - 1);
unsigned b = width - 1;
tcg_out_bfm(s, ext, rd, rn, a, b);
}
static void tcg_out_cmp(TCGContext *s, TCGType ext, TCGReg a,
tcg_target_long b, bool const_b)
{
@ -786,8 +808,7 @@ static inline void tcg_out_rev16(TCGContext *s, TCGType ext,
static inline void tcg_out_sxt(TCGContext *s, TCGType ext, int s_bits,
TCGReg rd, TCGReg rn)
{
/* using ALIASes SXTB 0x13001c00, SXTH 0x13003c00, SXTW 0x93407c00
of SBFM Xd, Xn, #0, #7|15|31 */
/* Using ALIASes SXTB, SXTH, SXTW, of SBFM Xd, Xn, #0, #7|15|31 */
int bits = 8 * (1 << s_bits) - 1;
tcg_out_sbfm(s, ext, rd, rn, 0, bits);
}
@ -795,8 +816,7 @@ static inline void tcg_out_sxt(TCGContext *s, TCGType ext, int s_bits,
static inline void tcg_out_uxt(TCGContext *s, int s_bits,
TCGReg rd, TCGReg rn)
{
/* using ALIASes UXTB 0x53001c00, UXTH 0x53003c00
of UBFM Wd, Wn, #0, #7|15 */
/* Using ALIASes UXTB, UXTH of UBFM Wd, Wn, #0, #7|15 */
int bits = 8 * (1 << s_bits) - 1;
tcg_out_ubfm(s, 0, rd, rn, 0, bits);
}
@ -1469,6 +1489,11 @@ static void tcg_out_op(TCGContext *s, TCGOpcode opc,
tcg_out_movr(s, 0, a0, a1);
break;
case INDEX_op_deposit_i64:
case INDEX_op_deposit_i32:
tcg_out_dep(s, ext, a0, REG0(2), args[3], args[4]);
break;
case INDEX_op_mov_i64:
case INDEX_op_mov_i32:
case INDEX_op_movi_i64:
@ -1590,6 +1615,9 @@ static const TCGTargetOpDef aarch64_op_defs[] = {
{ INDEX_op_ext16u_i64, { "r", "r" } },
{ INDEX_op_ext32u_i64, { "r", "r" } },
{ INDEX_op_deposit_i32, { "r", "0", "rZ" } },
{ INDEX_op_deposit_i64, { "r", "0", "rZ" } },
{ -1 },
};

4
tcg/aarch64/tcg-target.h
View File

@ -55,7 +55,7 @@ typedef enum {
#define TCG_TARGET_HAS_eqv_i32 1
#define TCG_TARGET_HAS_nand_i32 0
#define TCG_TARGET_HAS_nor_i32 0
#define TCG_TARGET_HAS_deposit_i32 0
#define TCG_TARGET_HAS_deposit_i32 1
#define TCG_TARGET_HAS_movcond_i32 1
#define TCG_TARGET_HAS_add2_i32 0
#define TCG_TARGET_HAS_sub2_i32 0
@ -83,7 +83,7 @@ typedef enum {
#define TCG_TARGET_HAS_eqv_i64 1
#define TCG_TARGET_HAS_nand_i64 0
#define TCG_TARGET_HAS_nor_i64 0
#define TCG_TARGET_HAS_deposit_i64 0
#define TCG_TARGET_HAS_deposit_i64 1
#define TCG_TARGET_HAS_movcond_i64 1
#define TCG_TARGET_HAS_add2_i64 0
#define TCG_TARGET_HAS_sub2_i64 0