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target/arm: Implement SVE compress active elements

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Backports commit 3ca879aeb3412bc2be35d01a7bedf5fada960b5d from qemu
This commit is contained in:
Richard Henderson 2018-06-15 12:51:14 -04:00 committed by Lioncash
parent d9ed221567
commit 8ba3bde59b
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GPG Key ID: 4E3C3CC1031BA9C7
7 changed files with 61 additions and 0 deletions
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2
qemu/aarch64.h
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@ -3330,6 +3330,8 @@
#define helper_sve_clz_d helper_sve_clz_d_aarch64
#define helper_sve_clz_h helper_sve_clz_h_aarch64
#define helper_sve_clz_s helper_sve_clz_s_aarch64
#define helper_sve_compact_d helper_sve_compact_d_aarch64
#define helper_sve_compact_s helper_sve_compact_s_aarch64
#define helper_sve_cnot_b helper_sve_cnot_b_aarch64
#define helper_sve_cnot_d helper_sve_cnot_d_aarch64
#define helper_sve_cnot_h helper_sve_cnot_h_aarch64

2
qemu/aarch64eb.h
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@ -3330,6 +3330,8 @@
#define helper_sve_clz_d helper_sve_clz_d_aarch64eb
#define helper_sve_clz_h helper_sve_clz_h_aarch64eb
#define helper_sve_clz_s helper_sve_clz_s_aarch64eb
#define helper_sve_compact_d helper_sve_compact_d_aarch64eb
#define helper_sve_compact_s helper_sve_compact_s_aarch64eb
#define helper_sve_cnot_b helper_sve_cnot_b_aarch64eb
#define helper_sve_cnot_d helper_sve_cnot_d_aarch64eb
#define helper_sve_cnot_h helper_sve_cnot_h_aarch64eb

2
qemu/header_gen.py
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@ -3351,6 +3351,8 @@ aarch64_symbols = (
'helper_sve_clz_d',
'helper_sve_clz_h',
'helper_sve_clz_s',
'helper_sve_compact_d',
'helper_sve_compact_s',
'helper_sve_cnot_b',
'helper_sve_cnot_d',
'helper_sve_cnot_h',

3
qemu/target/arm/helper-sve.h
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@ -460,6 +460,9 @@ DEF_HELPER_FLAGS_4(sve_trn_h, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(sve_trn_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(sve_trn_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(sve_compact_s, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_4(sve_compact_d, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_5(sve_and_pppp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_5(sve_bic_pppp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)
DEF_HELPER_FLAGS_5(sve_eor_pppp, TCG_CALL_NO_RWG, void, ptr, ptr, ptr, ptr, i32)

6
qemu/target/arm/sve.decode
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@ -424,6 +424,12 @@ UZP2_z 00000101 .. 1 ..... 011 011 ..... ..... @rd_rn_rm
TRN1_z 00000101 .. 1 ..... 011 100 ..... ..... @rd_rn_rm
TRN2_z 00000101 .. 1 ..... 011 101 ..... ..... @rd_rn_rm
### SVE Permute - Predicated Group
# SVE compress active elements
# Note esz >= 2
COMPACT 00000101 .. 100001 100 ... ..... ..... @rd_pg_rn
### SVE Predicate Logical Operations Group
# SVE predicate logical operations

34
qemu/target/arm/sve_helper.c
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@ -2035,3 +2035,37 @@ DO_TRN(sve_trn_d, uint64_t, )
#undef DO_ZIP
#undef DO_UZP
#undef DO_TRN
void HELPER(sve_compact_s)(void *vd, void *vn, void *vg, uint32_t desc)
{
intptr_t i, j, opr_sz = simd_oprsz(desc) / 4;
uint32_t *d = vd, *n = vn;
uint8_t *pg = vg;
for (i = j = 0; i < opr_sz; i++) {
if (pg[H1(i / 2)] & (i & 1 ? 0x10 : 0x01)) {
d[H4(j)] = n[H4(i)];
j++;
}
}
for (; j < opr_sz; j++) {
d[H4(j)] = 0;
}
}
void HELPER(sve_compact_d)(void *vd, void *vn, void *vg, uint32_t desc)
{
intptr_t i, j, opr_sz = simd_oprsz(desc) / 8;
uint64_t *d = vd, *n = vn;
uint8_t *pg = vg;
for (i = j = 0; i < opr_sz; i++) {
if (pg[H1(i)] & 1) {
d[j] = n[i];
j++;
}
}
for (; j < opr_sz; j++) {
d[j] = 0;
}
}

12
qemu/target/arm/translate-sve.c
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@ -2370,6 +2370,18 @@ static bool trans_TRN2_z(DisasContext *s, arg_rrr_esz *a, uint32_t insn)
return do_zzz_data_ool(s, a, 1 << a->esz, trn_fns[a->esz]);
}
/*
*** SVE Permute Vector - Predicated Group
*/
static bool trans_COMPACT(DisasContext *s, arg_rpr_esz *a, uint32_t insn)
{
static gen_helper_gvec_3 * const fns[4] = {
NULL, NULL, gen_helper_sve_compact_s, gen_helper_sve_compact_d
};
return do_zpz_ool(s, a, fns[a->esz]);
}
/*
*** SVE Memory - 32-bit Gather and Unsized Contiguous Group
*/