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A64: Add EOR3 and BCAX support

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Backported to unicorn from: https://lists.nongnu.org/archive/html/qemu-devel/2018-01/msg05003.html
This commit is contained in:
Lioncash 2018-01-25 21:17:53 -05:00
parent ed28aa9171
commit d41b200fd4
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2 changed files with 58 additions and 0 deletions
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1
qemu/target-arm/cpu.h
View file

@ -749,6 +749,7 @@ enum arm_features {
ARM_FEATURE_V8_SHA1, /* implements SHA1 part of v8 Crypto Extensions */
ARM_FEATURE_V8_SHA256, /* implements SHA256 part of v8 Crypto Extensions */
ARM_FEATURE_V8_PMULL, /* implements PMULL part of v8 Crypto Extensions */
ARM_FEATURE_V8_SHA3, /* implements SHA3 part of v8 Crypto Extensions */
};
static inline int arm_feature(CPUARMState *env, int feature)

57
qemu/target-arm/translate-a64.c
View file

@ -10912,6 +10912,62 @@ static void disas_crypto_two_reg_sha(DisasContext *s, uint32_t insn)
tcg_temp_free_i32(tcg_ctx, tcg_rn_regno);
}
/* Crypto four-register
* 31 23 22 21 20 16 15 14 10 9 5 4 0
* ---------------------------------------------------
* | 1 1 0 0 1 1 1 0 0 | Op0 | Rm | 0 | Ra | Rn | Rd |
* ---------------------------------------------------
*/
static void disas_crypto_four_reg(DisasContext *s, uint32_t insn)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
int op0 = extract32(insn, 21, 2);
int rm = extract32(insn, 16, 5);
int ra = extract32(insn, 10, 5);
int rn = extract32(insn, 5, 5);
int rd = extract32(insn, 0, 5);
TCGv_i64 tcg_op1, tcg_op2, tcg_op3, tcg_res[2];
int pass;
if (op0 > 1 || !arm_dc_feature(s, ARM_FEATURE_V8_SHA3)) {
unallocated_encoding(s);
return;
}
if (!fp_access_check(s)) {
return;
}
tcg_op1 = tcg_temp_new_i64(tcg_ctx);
tcg_op2 = tcg_temp_new_i64(tcg_ctx);
tcg_op3 = tcg_temp_new_i64(tcg_ctx);
tcg_res[0] = tcg_temp_new_i64(tcg_ctx);
tcg_res[1] = tcg_temp_new_i64(tcg_ctx);
for (pass = 0; pass < 2; pass++) {
read_vec_element(s, tcg_op1, rn, pass, MO_64);
read_vec_element(s, tcg_op2, rm, pass, MO_64);
read_vec_element(s, tcg_op3, ra, pass, MO_64);
if (op0 == 0) {
/* EOR3 */
tcg_gen_xor_i64(tcg_ctx, tcg_res[pass], tcg_op2, tcg_op3);
} else {
/* BCAX */
tcg_gen_andc_i64(tcg_ctx, tcg_res[pass], tcg_op2, tcg_op3);
}
tcg_gen_xor_i64(tcg_ctx, tcg_res[pass], tcg_res[pass], tcg_op1);
}
write_vec_element(s, tcg_res[0], rd, 0, MO_64);
write_vec_element(s, tcg_res[1], rd, 1, MO_64);
tcg_temp_free(tcg_ctx, tcg_op1);
tcg_temp_free(tcg_ctx, tcg_op2);
tcg_temp_free(tcg_ctx, tcg_op3);
tcg_temp_free(tcg_ctx, tcg_res[0]);
tcg_temp_free(tcg_ctx, tcg_res[1]);
}
/* C3.6 Data processing - SIMD, inc Crypto
*
* As the decode gets a little complex we are using a table based
@ -10941,6 +10997,7 @@ static const AArch64DecodeTable data_proc_simd[] = {
{ 0x4e280800, 0xff3e0c00, disas_crypto_aes },
{ 0x5e000000, 0xff208c00, disas_crypto_three_reg_sha },
{ 0x5e280800, 0xff3e0c00, disas_crypto_two_reg_sha },
{ 0xce000000, 0xff808000, disas_crypto_four_reg },
{ 0x00000000, 0x00000000, NULL }
};