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target/arm: Convert VCADD (vector) to decodetree

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Convert the VCADD (vector) insns to decodetree.

Backports commit 94d5eb7b3f72fbbdee55d7908e9cb6de95949f4b from qemu
This commit is contained in:
Peter Maydell 2020-05-07 09:05:53 -04:00 committed by Lioncash
parent d8287755b2
commit 1d4dba1e5a
3 changed files with 43 additions and 11 deletions
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5
qemu/target/arm/neon-shared.decode
View file

@ -35,4 +35,7 @@
%vd_sp 12:4 22:1
VCMLA 1111 110 rot:2 . 1 size:1 .... .... 1000 . q:1 . 0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp
vm=%vm_dp vn=%vn_dp vd=%vd_dp
VCADD 1111 110 rot:1 1 . 0 size:1 .... .... 1000 . q:1 . 0 .... \
vm=%vm_dp vn=%vn_dp vd=%vd_dp

38
qemu/target/arm/translate-neon.inc.c
View file

@ -68,3 +68,41 @@ static bool trans_VCMLA(DisasContext *s, arg_VCMLA *a)
tcg_temp_free_ptr(tcg_ctx, fpst);
return true;
}
static bool trans_VCADD(DisasContext *s, arg_VCADD *a)
{
int opr_sz;
TCGv_ptr fpst;
gen_helper_gvec_3_ptr *fn_gvec_ptr;
TCGContext *tcg_ctx = s->uc->tcg_ctx;
if (!dc_isar_feature(aa32_vcma, s)
|| (!a->size && !dc_isar_feature(aa32_fp16_arith, 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 | a->vm) & 0x10)) {
return false;
}
if ((a->vn | a->vm | a->vd) & a->q) {
return false;
}
if (!vfp_access_check(s)) {
return true;
}
opr_sz = (1 + a->q) * 8;
fpst = get_fpstatus_ptr(s, 1);
fn_gvec_ptr = a->size ? gen_helper_gvec_fcadds : gen_helper_gvec_fcaddh;
tcg_gen_gvec_3_ptr(tcg_ctx, vfp_reg_offset(1, a->vd),
vfp_reg_offset(1, a->vn),
vfp_reg_offset(1, a->vm),
fpst, opr_sz, opr_sz, a->rot,
fn_gvec_ptr);
tcg_temp_free_ptr(tcg_ctx, fpst);
return true;
}

11
qemu/target/arm/translate.c
View file

@ -7181,16 +7181,7 @@ static int disas_neon_insn_3same_ext(DisasContext *s, uint32_t insn)
bool is_long = false, q = extract32(insn, 6, 1);
bool ptr_is_env = false;
if ((insn & 0xfea00f10) == 0xfc800800) {
/* VCADD -- 1111 110R 1.0S .... .... 1000 ...0 .... */
int size = extract32(insn, 20, 1);
data = extract32(insn, 24, 1); /* rot */
if (!dc_isar_feature(aa32_vcma, s)
|| (!size && !dc_isar_feature(aa32_fp16_arith, s))) {
return 1;
}
fn_gvec_ptr = size ? gen_helper_gvec_fcadds : gen_helper_gvec_fcaddh;
} else if ((insn & 0xfeb00f00) == 0xfc200d00) {
if ((insn & 0xfeb00f00) == 0xfc200d00) {
/* V[US]DOT -- 1111 1100 0.10 .... .... 1101 .Q.U .... */
bool u = extract32(insn, 4, 1);
if (!dc_isar_feature(aa32_dp, s)) {