Skip to content

QuantizeErrorNEON: use addv w/aarch64 #142

New issue

Have a question about this project? Sign up for a free GitHub account to open an issue and contact its maintainers and the community.

Sign up for GitHub

By clicking “Sign up for GitHub”, you agree to our terms of service and privacy statement. We’ll occasionally send you account related emails.

Already on GitHub? Sign in to your account

Merged
jzern merged 1 commit into from
Jun 4, 2025
Merged

QuantizeErrorNEON: use addv w/aarch64 #142

Show file tree
Hide file tree
Changes from all commits
Commits
Show all changes
1 commit
Select commit
File filter

Filter by extension

Filter by extension
Conversations
Failed to load comments.
Loading
Jump to
Jump to file
Failed to load files.
Loading
Diff view
Diff view
4 changes: 4 additions & 0 deletions src/enc.cc
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -836,9 +836,13 @@ static uint32_t QuantizeErrorNEON(const int16_t in[64],
sum2 = vmlal_u16(sum2, vget_high_u16(G), vget_high_u16(G));
}
const uint32x4_t sum3 = vaddq_u32(sum1, sum2);
#if defined(SJPEG_AARCH64)
const uint32_t err = vaddvq_u32(sum3);
#else
const uint64x2_t sum4 = vpaddlq_u32(sum3);
const uint64_t sum5 = vgetq_lane_u64(sum4, 0) + vgetq_lane_u64(sum4, 1);
const uint32_t err = (uint32_t)sum5;
#endif
return err;
}

Expand Down
4 changes: 4 additions & 0 deletions src/sjpegi.h
View file
Open in desktop
Original file line number Diff line number Diff line change
Expand Up @@ -34,6 +34,10 @@
#define SJPEG_USE_NEON
#endif

#if defined(__aarch64__) || defined(_M_ARM64) || defined(_M_ARM64EC)
#define SJPEG_AARCH64
#endif

#if defined(SJPEG_NEED_ASM_HEADERS)
#if defined(SJPEG_USE_SSE2)
#include <emmintrin.h>
Expand Down