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arm/translate-a64: implement simd_scalar_three_reg_same_fp16

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This covers the encoding group:

Advanced SIMD scalar three same FP16

As all the helpers are already there it is simply a case of calling the
existing helpers in the scalar context.

Backports commit 7c93b7741b29b3ffda81a6e9525771b4409db99f from qemu
This commit is contained in:
Alex Bennée 2018-03-08 22:53:04 -05:00 committed by Lioncash
parent dd29452046
commit c6c8a1cccc
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 100 additions and 0 deletions
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100
qemu/target/arm/translate-a64.c
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@ -7928,6 +7928,105 @@ static void disas_simd_scalar_three_reg_same(DisasContext *s, uint32_t insn)
tcg_temp_free_i64(tcg_ctx, tcg_rd);
}
/* AdvSIMD scalar three same FP16
* 31 30 29 28 24 23 22 21 20 16 15 14 13 11 10 9 5 4 0
* +-----+---+-----------+---+-----+------+-----+--------+---+----+----+
* | 0 1 | U | 1 1 1 1 0 | a | 1 0 | Rm | 0 0 | opcode | 1 | Rn | Rd |
* +-----+---+-----------+---+-----+------+-----+--------+---+----+----+
* v: 0101 1110 0100 0000 0000 0100 0000 0000 => 5e400400
* m: 1101 1111 0110 0000 1100 0100 0000 0000 => df60c400
*/
static void disas_simd_scalar_three_reg_same_fp16(DisasContext *s,
uint32_t insn)
{
TCGContext *tcg_ctx = s->uc->tcg_ctx;
int rd = extract32(insn, 0, 5);
int rn = extract32(insn, 5, 5);
int opcode = extract32(insn, 11, 3);
int rm = extract32(insn, 16, 5);
bool u = extract32(insn, 29, 1);
bool a = extract32(insn, 23, 1);
int fpopcode = opcode | (a << 3) | (u << 4);
TCGv_ptr fpst;
TCGv_i32 tcg_op1;
TCGv_i32 tcg_op2;
TCGv_i32 tcg_res;
switch (fpopcode) {
case 0x03: /* FMULX */
case 0x04: /* FCMEQ (reg) */
case 0x07: /* FRECPS */
case 0x0f: /* FRSQRTS */
case 0x14: /* FCMGE (reg) */
case 0x15: /* FACGE */
case 0x1a: /* FABD */
case 0x1c: /* FCMGT (reg) */
case 0x1d: /* FACGT */
break;
default:
unallocated_encoding(s);
return;
}
if (!arm_dc_feature(s, ARM_FEATURE_V8_FP16)) {
unallocated_encoding(s);
}
if (!fp_access_check(s)) {
return;
}
fpst = get_fpstatus_ptr(tcg_ctx, true);
tcg_op1 = tcg_temp_new_i32(tcg_ctx);
tcg_op2 = tcg_temp_new_i32(tcg_ctx);
tcg_res = tcg_temp_new_i32(tcg_ctx);
read_vec_element_i32(s, tcg_op1, rn, 0, MO_16);
read_vec_element_i32(s, tcg_op2, rm, 0, MO_16);
switch (fpopcode) {
case 0x03: /* FMULX */
gen_helper_advsimd_mulxh(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x04: /* FCMEQ (reg) */
gen_helper_advsimd_ceq_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x07: /* FRECPS */
gen_helper_recpsf_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x0f: /* FRSQRTS */
gen_helper_rsqrtsf_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x14: /* FCMGE (reg) */
gen_helper_advsimd_cge_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x15: /* FACGE */
gen_helper_advsimd_acge_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1a: /* FABD */
gen_helper_advsimd_subh(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
tcg_gen_andi_i32(tcg_ctx, tcg_res, tcg_res, 0x7fff);
break;
case 0x1c: /* FCMGT (reg) */
gen_helper_advsimd_cgt_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
case 0x1d: /* FACGT */
gen_helper_advsimd_acgt_f16(tcg_ctx, tcg_res, tcg_op1, tcg_op2, fpst);
break;
default:
g_assert_not_reached();
}
write_fp_sreg(s, rd, tcg_res);
tcg_temp_free_i32(tcg_ctx, tcg_res);
tcg_temp_free_i32(tcg_ctx, tcg_op1);
tcg_temp_free_i32(tcg_ctx, tcg_op2);
tcg_temp_free_ptr(tcg_ctx, fpst);
}
static void handle_2misc_64(DisasContext *s, int opcode, bool u,
TCGv_i64 tcg_rd, TCGv_i64 tcg_rn,
TCGv_i32 tcg_rmode, TCGv_ptr tcg_fpstatus)
@ -12813,6 +12912,7 @@ static const AArch64DecodeTable data_proc_simd[] = {
{ 0xce408000, 0xffe0c000, disas_crypto_three_reg_imm2 },
{ 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 },
{ 0x00000000, 0x00000000, NULL }
};