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| author | Frank Barchard <fbarchard@google.com> | 2023-06-06 15:05:32 -0700 |
|---|---|---|
| committer | libyuv LUCI CQ <libyuv-scoped@luci-project-accounts.iam.gserviceaccount.com> | 2023-06-07 00:02:40 +0000 |
| commit | b08ccb6a83f5c76d5a9e181b0f65efd33ce8262d (patch) | |
| tree | 955ccd5af95f4edc619ed1a79ed7e9ad5979a21d /source | |
| parent | 1602e4c607f3268685eff6ed56b3a0d994f5b3fc (diff) | |
| download | libyuv-b08ccb6a83f5c76d5a9e181b0f65efd33ce8262d.tar.gz | |
FP16 to FP32 float conversion row function
Bug: None
Change-Id: I97aab6aafd41c3bf36bfbf33fdcc424e5b3fd6e3
Reviewed-on: https://chromium-review.googlesource.com/c/libyuv/libyuv/+/4590225
Commit-Queue: Frank Barchard <fbarchard@chromium.org>
Reviewed-by: Wan-Teh Chang <wtc@google.com>
Diffstat (limited to 'source')
| -rw-r--r-- | source/row_neon64.cc | 40 |
1 files changed, 40 insertions, 0 deletions
diff --git a/source/row_neon64.cc b/source/row_neon64.cc index 74190d61..a341dc13 100644 --- a/source/row_neon64.cc +++ b/source/row_neon64.cc @@ -3960,6 +3960,46 @@ void ByteToFloatRow_NEON(const uint8_t* src, : "cc", "memory", "v1", "v2", "v3"); } +// Convert FP16 Half Floats to FP32 Floats +void ConvertFP16ToFP32Row_NEON(const uint16_t* src, // fp16 + float* dst, + int width) { + asm volatile( + "1: \n" + "ld1 {v1.8h}, [%0], #16 \n" // load 8 halffloats + "subs %w2, %w2, #8 \n" // 8 floats per loop + "prfm pldl1keep, [%0, 448] \n" + "fcvtl v2.4s, v1.4h \n" // 8 floats + "fcvtl2 v3.4s, v1.8h \n" + "stp q2, q3, [%1], #32 \n" // store 8 floats + "b.gt 1b \n" + : "+r"(src), // %0 + "+r"(dst), // %1 + "+r"(width) // %2 + : + : "cc", "memory", "v1", "v2", "v3"); +} + +// Convert FP32 Floats to FP16 Half Floats +void ConvertFP32ToFP16Row_NEON(const float* src, + uint16_t* dst, // fp16 + int width) { + asm volatile( + "1: \n" + "ldp q2, q3, [%0], #32 \n" // load 8 floats + "subs %w2, %w2, #8 \n" // 8 floats per loop + "prfm pldl1keep, [%0, 448] \n" + "fcvtn v1.4h, v2.4s \n" // 8 fp16 halffloats + "fcvtn2 v1.8h, v3.4s \n" + "str q1, [%1], #16 \n" // store 8 fp16 halffloats + "b.gt 1b \n" + : "+r"(src), // %0 + "+r"(dst), // %1 + "+r"(width) // %2 + : + : "cc", "memory", "v1", "v2", "v3"); +} + float ScaleMaxSamples_NEON(const float* src, float* dst, float scale, |