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| author | Richard Henderson | 2021-05-26 00:58:14 +0200 |
|---|---|---|
| committer | Peter Maydell | 2021-06-03 17:43:26 +0200 |
| commit | 5693887f2e97335362d945c778f2bbddd4e9d1bb (patch) | |
| tree | 064e2cc4ea55864aa274944503d2477f6db4a4d1 /target/arm/vec_helper.c | |
| parent | target/arm: Implement bfloat16 matrix multiply accumulate (diff) | |
| download | qemu-5693887f2e97335362d945c778f2bbddd4e9d1bb.tar.gz qemu-5693887f2e97335362d945c778f2bbddd4e9d1bb.tar.xz qemu-5693887f2e97335362d945c778f2bbddd4e9d1bb.zip | |
target/arm: Implement bfloat widening fma (vector)
This is BFMLAL{B,T} for both AArch64 AdvSIMD and SVE,
and VFMA{B,T}.BF16 for AArch32 NEON.
Reviewed-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Message-id: 20210525225817.400336-10-richard.henderson@linaro.org
Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Diffstat (limited to 'target/arm/vec_helper.c')
| -rw-r--r-- | target/arm/vec_helper.c | 16 |
1 files changed, 16 insertions, 0 deletions
diff --git a/target/arm/vec_helper.c b/target/arm/vec_helper.c index 27e9bdd329..d82736b5e6 100644 --- a/target/arm/vec_helper.c +++ b/target/arm/vec_helper.c @@ -2512,3 +2512,19 @@ void HELPER(gvec_bfmmla)(void *vd, void *vn, void *vm, void *va, uint32_t desc) } clear_tail(d, opr_sz, simd_maxsz(desc)); } + +void HELPER(gvec_bfmlal)(void *vd, void *vn, void *vm, void *va, + void *stat, uint32_t desc) +{ + intptr_t i, opr_sz = simd_oprsz(desc); + intptr_t sel = simd_data(desc); + float32 *d = vd, *a = va; + bfloat16 *n = vn, *m = vm; + + for (i = 0; i < opr_sz / 4; ++i) { + float32 nn = n[H2(i * 2 + sel)] << 16; + float32 mm = m[H2(i * 2 + sel)] << 16; + d[H4(i)] = float32_muladd(nn, mm, a[H4(i)], 0, stat); + } + clear_tail(d, opr_sz, simd_maxsz(desc)); +} |