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target/arm: Convert V[US]DOT (scalar) to decodetree 

Convert the V[US]DOT (scalar) insns in the 2reg-scalar-ext group
to decodetree.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20200430181003.21682-10-peter.maydell@linaro.org
This commit is contained in:
Peter Maydell 2020-04-30 19:09:36 +01:00
parent 7e1b5d6153
commit 35f5d4d174
3 changed files with 39 additions and 12 deletions
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3
target/arm/neon-shared.decode
View File

@ -54,3 +54,6 @@ VCMLA_scalar 1111 1110 0 . rot:2 .... .... 1000 . q:1 index:1 0 vm:4 \
vn=%vn_dp vd=%vd_dp size=0
VCMLA_scalar 1111 1110 1 . rot:2 .... .... 1000 . q:1 . 0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp size=1 index=0
VDOT_scalar 1111 1110 0 . 10 .... .... 1101 . q:1 index:1 u:1 rm:4 \
vm=%vm_dp vn=%vn_dp vd=%vd_dp

35
target/arm/translate-neon.inc.c
View File

@ -207,3 +207,38 @@ static bool trans_VCMLA_scalar(DisasContext *s, arg_VCMLA_scalar *a)
tcg_temp_free_ptr(fpst);
return true;
}
static bool trans_VDOT_scalar(DisasContext *s, arg_VDOT_scalar *a)
{
gen_helper_gvec_3 *fn_gvec;
int opr_sz;
TCGv_ptr fpst;
if (!dc_isar_feature(aa32_dp, s)) {
return false;
}
/* UNDEF accesses to D16-D31 if they don't exist. */
if (!dc_isar_feature(aa32_simd_r32, s) &&
((a->vd | a->vn) & 0x10)) {
return false;
}
if ((a->vd | a->vn) & a->q) {
return false;
}
if (!vfp_access_check(s)) {
return true;
}
fn_gvec = a->u ? gen_helper_gvec_udot_idx_b : gen_helper_gvec_sdot_idx_b;
opr_sz = (1 + a->q) * 8;
fpst = get_fpstatus_ptr(1);
tcg_gen_gvec_3_ool(vfp_reg_offset(1, a->vd),
vfp_reg_offset(1, a->vn),
vfp_reg_offset(1, a->rm),
opr_sz, opr_sz, a->index, fn_gvec);
tcg_temp_free_ptr(fpst);
return true;
}

13
target/arm/translate.c
View File

@ -7049,18 +7049,7 @@ static int disas_neon_insn_2reg_scalar_ext(DisasContext *s, uint32_t insn)
bool is_long = false, q = extract32(insn, 6, 1);
bool ptr_is_env = false;
if ((insn & 0xffb00f00) == 0xfe200d00) {
/* V[US]DOT -- 1111 1110 0.10 .... .... 1101 .Q.U .... */
int u = extract32(insn, 4, 1);
if (!dc_isar_feature(aa32_dp, s)) {
return 1;
}
fn_gvec = u ? gen_helper_gvec_udot_idx_b : gen_helper_gvec_sdot_idx_b;
/* rm is just Vm, and index is M. */
data = extract32(insn, 5, 1); /* index */
rm = extract32(insn, 0, 4);
} else if ((insn & 0xffa00f10) == 0xfe000810) {
if ((insn & 0xffa00f10) == 0xfe000810) {
/* VFM[AS]L -- 1111 1110 0.0S .... .... 1000 .Q.1 .... */
int is_s = extract32(insn, 20, 1);
int vm20 = extract32(insn, 0, 3);