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target/arm: Convert XAR to decodetree

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Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20240524232121.284515-17-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2024-05-24 16:20:30 -07:00 committed by Peter Maydell
parent 376bb8a45d
commit d90a473363
2 changed files with 18 additions and 29 deletions
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4
target/arm/tcg/a64.decode
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@ -654,3 +654,7 @@ SM3TT1A 11001110 010 ..... 10 .. 00 ..... ..... @crypto3i
SM3TT1B 11001110 010 ..... 10 .. 01 ..... ..... @crypto3i
SM3TT2A 11001110 010 ..... 10 .. 10 ..... ..... @crypto3i
SM3TT2B 11001110 010 ..... 10 .. 11 ..... ..... @crypto3i
### Cryptographic XAR
XAR 1100 1110 100 rm:5 imm:6 rn:5 rd:5

43
target/arm/tcg/translate-a64.c
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@ -4688,6 +4688,20 @@ TRANS_FEAT(SM3TT1B, aa64_sm3, do_crypto3i, a, gen_helper_crypto_sm3tt1b)
TRANS_FEAT(SM3TT2A, aa64_sm3, do_crypto3i, a, gen_helper_crypto_sm3tt2a)
TRANS_FEAT(SM3TT2B, aa64_sm3, do_crypto3i, a, gen_helper_crypto_sm3tt2b)
static bool trans_XAR(DisasContext *s, arg_XAR *a)
{
if (!dc_isar_feature(aa64_sha3, s)) {
return false;
}
if (fp_access_check(s)) {
gen_gvec_xar(MO_64, vec_full_reg_offset(s, a->rd),
vec_full_reg_offset(s, a->rn),
vec_full_reg_offset(s, a->rm), a->imm, 16,
vec_full_reg_size(s));
}
return true;
}
/* Shift a TCGv src by TCGv shift_amount, put result in dst.
* Note that it is the caller's responsibility to ensure that the
* shift amount is in range (ie 0..31 or 0..63) and provide the ARM
@ -13588,34 +13602,6 @@ static void disas_simd_indexed(DisasContext *s, uint32_t insn)
}
}
/* Crypto XAR
* 31 21 20 16 15 10 9 5 4 0
* +-----------------------+------+--------+------+------+
* | 1 1 0 0 1 1 1 0 1 0 0 | Rm | imm6 | Rn | Rd |
* +-----------------------+------+--------+------+------+
*/
static void disas_crypto_xar(DisasContext *s, uint32_t insn)
{
int rm = extract32(insn, 16, 5);
int imm6 = extract32(insn, 10, 6);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
if (!dc_isar_feature(aa64_sha3, s)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
gen_gvec_xar(MO_64, vec_full_reg_offset(s, rd),
vec_full_reg_offset(s, rn),
vec_full_reg_offset(s, rm), imm6, 16,
vec_full_reg_size(s));
}
/* C3.6 Data processing - SIMD, inc Crypto
*
* As the decode gets a little complex we are using a table based
@ -13644,7 +13630,6 @@ static const AArch64DecodeTable data_proc_simd[] = {
{ 0x5e000400, 0xdfe08400, disas_simd_scalar_copy },
{ 0x5f000000, 0xdf000400, disas_simd_indexed }, /* scalar indexed */
{ 0x5f000400, 0xdf800400, disas_simd_scalar_shift_imm },
{ 0xce800000, 0xffe00000, disas_crypto_xar },
{ 0x0e400400, 0x9f60c400, disas_simd_three_reg_same_fp16 },
{ 0x0e780800, 0x8f7e0c00, disas_simd_two_reg_misc_fp16 },
{ 0x5e400400, 0xdf60c400, disas_simd_scalar_three_reg_same_fp16 },