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target/arm: Convert TBL, TBX to decodetree 

Reviewed-by: Philippe Mathieu-Daudé <philmd@linaro.org>
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240912024114.1097832-8-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-09-11 19:40:52 -07:00 committed by Peter Maydell
parent 9c8f7da04b
commit 5dd7318f24
2 changed files with 18 additions and 33 deletions
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4
target/arm/tcg/a64.decode
View File

@ -1141,3 +1141,7 @@ FNMSUB 0001 1111 .. 1 ..... 1 ..... ..... ..... @rrrr_hsd
EXT_d 0010 1110 00 0 rm:5 00 imm:3 0 rn:5 rd:5
EXT_q 0110 1110 00 0 rm:5 0 imm:4 0 rn:5 rd:5
# Advanced SIMD Table Lookup
TBL_TBX 0 q:1 00 1110 000 rm:5 0 len:2 tbx:1 00 rn:5 rd:5

47
target/arm/tcg/translate-a64.c
View File

@ -4680,6 +4680,20 @@ static bool trans_EXTR(DisasContext *s, arg_extract *a)
return true;
}
static bool trans_TBL_TBX(DisasContext *s, arg_TBL_TBX *a)
{
if (fp_access_check(s)) {
int len = (a->len + 1) * 16;
tcg_gen_gvec_2_ptr(vec_full_reg_offset(s, a->rd),
vec_full_reg_offset(s, a->rm), tcg_env,
a->q ? 16 : 8, vec_full_reg_size(s),
(len << 6) | (a->tbx << 5) | a->rn,
gen_helper_simd_tblx);
}
return true;
}
/*
* Cryptographic AES, SHA, SHA512
*/
@ -8938,38 +8952,6 @@ static void disas_data_proc_fp(DisasContext *s, uint32_t insn)
}
}
/* TBL/TBX
* 31 30 29 24 23 22 21 20 16 15 14 13 12 11 10 9 5 4 0
* +---+---+-------------+-----+---+------+---+-----+----+-----+------+------+
* | 0 | Q | 0 0 1 1 1 0 | op2 | 0 | Rm | 0 | len | op | 0 0 | Rn | Rd |
* +---+---+-------------+-----+---+------+---+-----+----+-----+------+------+
*/
static void disas_simd_tb(DisasContext *s, uint32_t insn)
{
int op2 = extract32(insn, 22, 2);
int is_q = extract32(insn, 30, 1);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
int is_tbx = extract32(insn, 12, 1);
int len = (extract32(insn, 13, 2) + 1) * 16;
if (op2 != 0) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_gen_gvec_2_ptr(vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rm), tcg_env,
is_q ? 16 : 8, vec_full_reg_size(s),
(len << 6) | (is_tbx << 5) | rn,
gen_helper_simd_tblx);
}
/* ZIP/UZP/TRN
* 31 30 29 24 23 22 21 20 16 15 14 12 11 10 9 5 4 0
* +---+---+-------------+------+---+------+---+------------------+------+
@ -11834,7 +11816,6 @@ static const AArch64DecodeTable data_proc_simd[] = {
/* simd_mod_imm decode is a subset of simd_shift_imm, so must precede it */
{ 0x0f000400, 0x9ff80400, disas_simd_mod_imm },
{ 0x0f000400, 0x9f800400, disas_simd_shift_imm },
{ 0x0e000000, 0xbf208c00, disas_simd_tb },
{ 0x0e000800, 0xbf208c00, disas_simd_zip_trn },
{ 0x5e200800, 0xdf3e0c00, disas_simd_scalar_two_reg_misc },
{ 0x5f000400, 0xdf800400, disas_simd_scalar_shift_imm },