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target-arm: A64: Implement 3-register SHA instructions

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Implement the 3-register SHA instruction group from the optional
Crypto Extensions.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Message-id: 1401458125-27977-9-git-send-email-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2014-06-09 15:43:26 +01:00
parent 5acc765c04
commit be56f04eea
1 changed files with 58 additions and 1 deletions
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59
target-arm/translate-a64.c
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@ -10609,7 +10609,64 @@ static void disas_crypto_aes(DisasContext *s, uint32_t insn)
*/
static void disas_crypto_three_reg_sha(DisasContext *s, uint32_t insn)
{
unsupported_encoding(s, insn);
int size = extract32(insn, 22, 2);
int opcode = extract32(insn, 12, 3);
int rm = extract32(insn, 16, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
CryptoThreeOpEnvFn *genfn;
TCGv_i32 tcg_rd_regno, tcg_rn_regno, tcg_rm_regno;
int feature = ARM_FEATURE_V8_SHA256;
if (size != 0) {
unallocated_encoding(s);
return;
}
switch (opcode) {
case 0: /* SHA1C */
case 1: /* SHA1P */
case 2: /* SHA1M */
case 3: /* SHA1SU0 */
genfn = NULL;
feature = ARM_FEATURE_V8_SHA1;
break;
case 4: /* SHA256H */
genfn = gen_helper_crypto_sha256h;
break;
case 5: /* SHA256H2 */
genfn = gen_helper_crypto_sha256h2;
break;
case 6: /* SHA256SU1 */
genfn = gen_helper_crypto_sha256su1;
break;
default:
unallocated_encoding(s);
return;
}
if (!arm_dc_feature(s, feature)) {
unallocated_encoding(s);
return;
}
tcg_rd_regno = tcg_const_i32(rd << 1);
tcg_rn_regno = tcg_const_i32(rn << 1);
tcg_rm_regno = tcg_const_i32(rm << 1);
if (genfn) {
genfn(cpu_env, tcg_rd_regno, tcg_rn_regno, tcg_rm_regno);
} else {
TCGv_i32 tcg_opcode = tcg_const_i32(opcode);
gen_helper_crypto_sha1_3reg(cpu_env, tcg_rd_regno,
tcg_rn_regno, tcg_rm_regno, tcg_opcode);
tcg_temp_free_i32(tcg_opcode);
}
tcg_temp_free_i32(tcg_rd_regno);
tcg_temp_free_i32(tcg_rn_regno);
tcg_temp_free_i32(tcg_rm_regno);
}
/* C3.6.21 Crypto two-reg SHA