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target/arm: Implement SME2 BFMOPA (non-widening)

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Reviewed-by: Alex Bennée <alex.bennee@linaro.org>
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20250704142112.1018902-106-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
This commit is contained in:
Peter Maydell 2025-07-04 08:21:08 -06:00
parent 1a039f94d3
commit 4805911a92
4 changed files with 64 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

6
target/arm/tcg/helper-sme.h
View file

@ -145,6 +145,8 @@ DEF_HELPER_FLAGS_7(sme_fmopa_d, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_7(sme_bfmopa_w, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_FLAGS_7(sme_bfmopa, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_7(sme_fmops_w_h, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, env, i32)
@ -156,6 +158,8 @@ DEF_HELPER_FLAGS_7(sme_fmops_d, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_7(sme_bfmops_w, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_FLAGS_7(sme_bfmops, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_7(sme_ah_fmops_w_h, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, env, i32)
@ -167,6 +171,8 @@ DEF_HELPER_FLAGS_7(sme_ah_fmops_d, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_7(sme_ah_bfmops_w, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, env, i32)
DEF_HELPER_FLAGS_7(sme_ah_bfmops, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, fpst, i32)
DEF_HELPER_FLAGS_6(sme_smopa_s, TCG_CALL_NO_RWG,
void, ptr, ptr, ptr, ptr, ptr, i32)

2
target/arm/tcg/sme.decode
View file

@ -191,6 +191,8 @@ FMOPA_h 10000001 100 ..... ... ... ..... . 100 . @op_16
FMOPA_s 10000000 100 ..... ... ... ..... . 00 .. @op_32
FMOPA_d 10000000 110 ..... ... ... ..... . 0 ... @op_64
BFMOPA 10000001 101 ..... ... ... ..... . 100 . @op_16
BFMOPA_w 10000001 100 ..... ... ... ..... . 00 .. @op_32
FMOPA_w_h 10000001 101 ..... ... ... ..... . 00 .. @op_32

51
target/arm/tcg/sme_helper.c
View file

@ -1144,6 +1144,57 @@ void HELPER(sme_ah_fmops_d)(void *vza, void *vzn, void *vzm, void *vpn,
float_muladd_negate_product);
}
static void do_bfmopa(void *vza, void *vzn, void *vzm, uint16_t *pn,
uint16_t *pm, float_status *fpst, uint32_t desc,
uint16_t negx, int negf)
{
intptr_t row, col, oprsz = simd_maxsz(desc);
for (row = 0; row < oprsz; ) {
uint16_t pa = pn[H2(row >> 4)];
do {
if (pa & 1) {
void *vza_row = vza + tile_vslice_offset(row);
uint16_t n = *(uint32_t *)(vzn + H1_2(row)) ^ negx;
for (col = 0; col < oprsz; ) {
uint16_t pb = pm[H2(col >> 4)];
do {
if (pb & 1) {
uint16_t *a = vza_row + H1_2(col);
uint16_t *m = vzm + H1_2(col);
*a = bfloat16_muladd(n, *m, *a, negf, fpst);
}
col += 2;
pb >>= 2;
} while (col & 15);
}
}
row += 2;
pa >>= 2;
} while (row & 15);
}
}
void HELPER(sme_bfmopa)(void *vza, void *vzn, void *vzm, void *vpn,
void *vpm, float_status *fpst, uint32_t desc)
{
do_bfmopa(vza, vzn, vzm, vpn, vpm, fpst, desc, 0, 0);
}
void HELPER(sme_bfmops)(void *vza, void *vzn, void *vzm, void *vpn,
void *vpm, float_status *fpst, uint32_t desc)
{
do_bfmopa(vza, vzn, vzm, vpn, vpm, fpst, desc, 1u << 15, 0);
}
void HELPER(sme_ah_bfmops)(void *vza, void *vzn, void *vzm, void *vpn,
void *vpm, float_status *fpst, uint32_t desc)
{
do_bfmopa(vza, vzn, vzm, vpn, vpm, fpst, desc, 0,
float_muladd_negate_product);
}
/*
* Alter PAIR as needed for controlling predicates being false,
* and for NEG on an enabled row element.

5
target/arm/tcg/translate-sme.c
View file

@ -582,6 +582,11 @@ TRANS_FEAT(FMOPA_d, aa64_sme_f64f64, do_outprod_fpst, a, MO_64, FPST_ZA,
: !s->fpcr_ah ? gen_helper_sme_fmops_d
: gen_helper_sme_ah_fmops_d)
TRANS_FEAT(BFMOPA, aa64_sme_b16b16, do_outprod_fpst, a, MO_16, FPST_ZA,
!a->sub ? gen_helper_sme_bfmopa
: !s->fpcr_ah ? gen_helper_sme_bfmops
: gen_helper_sme_ah_bfmops)
TRANS_FEAT(BFMOPA_w, aa64_sme, do_outprod_env, a, MO_32,
!a->sub ? gen_helper_sme_bfmopa_w
: !s->fpcr_ah ? gen_helper_sme_bfmops_w