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target/arm: Decode aa32 armv8.3 2-reg-index

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Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20180228193125.20577-15-richard.henderson@linaro.org
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Richard Henderson 2018-03-02 10:45:45 +00:00 committed by Peter Maydell
parent 8b7209fae7
commit 638808ff8a
1 changed files with 61 additions and 0 deletions
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61
target/arm/translate.c
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@ -7742,6 +7742,61 @@ static int disas_neon_insn_3same_ext(DisasContext *s, uint32_t insn)
return 0;
}
/* Advanced SIMD two registers and a scalar extension.
* 31 24 23 22 20 16 12 11 10 9 8 3 0
* +-----------------+----+---+----+----+----+---+----+---+----+---------+----+
* | 1 1 1 1 1 1 1 0 | o1 | D | o2 | Vn | Vd | 1 | o3 | 0 | o4 | N Q M U | Vm |
* +-----------------+----+---+----+----+----+---+----+---+----+---------+----+
*
*/
static int disas_neon_insn_2reg_scalar_ext(DisasContext *s, uint32_t insn)
{
int rd, rn, rm, rot, size, opr_sz;
TCGv_ptr fpst;
bool q;
q = extract32(insn, 6, 1);
VFP_DREG_D(rd, insn);
VFP_DREG_N(rn, insn);
VFP_DREG_M(rm, insn);
if ((rd | rn) & q) {
return 1;
}
if ((insn & 0xff000f10) == 0xfe000800) {
/* VCMLA (indexed) -- 1111 1110 S.RR .... .... 1000 ...0 .... */
rot = extract32(insn, 20, 2);
size = extract32(insn, 23, 1);
if (!arm_dc_feature(s, ARM_FEATURE_V8_FCMA)
|| (!size && !arm_dc_feature(s, ARM_FEATURE_V8_FP16))) {
return 1;
}
} else {
return 1;
}
if (s->fp_excp_el) {
gen_exception_insn(s, 4, EXCP_UDEF,
syn_fp_access_trap(1, 0xe, false), s->fp_excp_el);
return 0;
}
if (!s->vfp_enabled) {
return 1;
}
opr_sz = (1 + q) * 8;
fpst = get_fpstatus_ptr(1);
tcg_gen_gvec_3_ptr(vfp_reg_offset(1, rd),
vfp_reg_offset(1, rn),
vfp_reg_offset(1, rm), fpst,
opr_sz, opr_sz, rot,
size ? gen_helper_gvec_fcmlas_idx
: gen_helper_gvec_fcmlah_idx);
tcg_temp_free_ptr(fpst);
return 0;
}
static int disas_coproc_insn(DisasContext *s, uint32_t insn)
{
int cpnum, is64, crn, crm, opc1, opc2, isread, rt, rt2;
@ -8492,6 +8547,12 @@ static void disas_arm_insn(DisasContext *s, unsigned int insn)
goto illegal_op;
}
return;
} else if ((insn & 0x0f000a00) == 0x0e000800
&& arm_dc_feature(s, ARM_FEATURE_V8)) {
if (disas_neon_insn_2reg_scalar_ext(s, insn)) {
goto illegal_op;
}
return;
} else if ((insn & 0x0fe00000) == 0x0c400000) {
/* Coprocessor double register transfer. */
ARCH(5TE);