diff options
Diffstat (limited to 'files/source/scale_neon64.cc')
| -rw-r--r-- | files/source/scale_neon64.cc | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/files/source/scale_neon64.cc b/files/source/scale_neon64.cc index 9f9636e6..ad06ee83 100644 --- a/files/source/scale_neon64.cc +++ b/files/source/scale_neon64.cc @@ -1568,6 +1568,45 @@ void ScaleRowUp2_16_NEON(const uint16_t* src_ptr, ); } +void ScaleUVRowDown2_NEON(const uint8_t* src_ptr, + ptrdiff_t src_stride, + uint8_t* dst, + int dst_width) { + (void)src_stride; + asm volatile( + "1: \n" + "ld2 {v0.8h,v1.8h}, [%0], #32 \n" // load 16 UV + "subs %w2, %w2, #8 \n" // 8 processed per loop. + "prfm pldl1keep, [%0, 448] \n" // prefetch 7 lines ahead + "st1 {v1.8h}, [%1], #16 \n" // store 8 UV + "b.gt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst), // %1 + "+r"(dst_width) // %2 + : + : "memory", "cc", "v0", "v1"); +} + +void ScaleUVRowDown2Linear_NEON(const uint8_t* src_ptr, + ptrdiff_t src_stride, + uint8_t* dst, + int dst_width) { + (void)src_stride; + asm volatile( + "1: \n" + "ld2 {v0.8h,v1.8h}, [%0], #32 \n" // load 16 UV + "subs %w2, %w2, #8 \n" // 8 processed per loop. + "urhadd v0.16b, v0.16b, v1.16b \n" // rounding half add + "prfm pldl1keep, [%0, 448] \n" // prefetch 7 lines ahead + "st1 {v0.8h}, [%1], #16 \n" // store 8 UV + "b.gt 1b \n" + : "+r"(src_ptr), // %0 + "+r"(dst), // %1 + "+r"(dst_width) // %2 + : + : "memory", "cc", "v0", "v1"); +} + void ScaleUVRowDown2Box_NEON(const uint8_t* src_ptr, ptrdiff_t src_stride, uint8_t* dst, |