diff options
| author | Martin Storsjö <martin@martin.st> | 2019-03-05 12:32:05 +0300 |
|---|---|---|
| committer | Martin Storsjö <martin@martin.st> | 2019-03-05 22:10:25 +0300 |
| commit | 4f5261a0ed399dcec88c87f34d1095b0152b9ae1 (patch) | |
| tree | 094447ae8576c73d77971b84474132315ccadb5e /src/arm/64/cdef.S | |
| parent | dc2ae517648accc0fe4ac0737f9ee850accda278 (diff) | |
arm64: cdef: Do saturating subtractions to avoid max operations with 0
Before: Cortex A53 A72 A73
cdef_filter_4x4_8bpc_neon: 677.4 433.9 452.9
cdef_filter_4x8_8bpc_neon: 1255.0 815.2 841.8
cdef_filter_8x8_8bpc_neon: 2278.5 1440.0 1505.0
After:
cdef_filter_4x4_8bpc_neon: 645.5 401.9 422.5
cdef_filter_4x8_8bpc_neon: 1193.7 756.6 782.4
cdef_filter_8x8_8bpc_neon: 2162.4 1361.9 1375.6
Diffstat (limited to 'src/arm/64/cdef.S')
| -rw-r--r-- | src/arm/64/cdef.S | 13 |
1 files changed, 4 insertions, 9 deletions
diff --git a/src/arm/64/cdef.S b/src/arm/64/cdef.S index d2fb0da..8913cde 100644 --- a/src/arm/64/cdef.S +++ b/src/arm/64/cdef.S @@ -304,10 +304,8 @@ endconst uabd v20.8h, v0.8h, \s2\().8h // abs(diff) ushl v17.8h, v16.8h, \shift // abs(diff) >> shift ushl v21.8h, v20.8h, \shift // abs(diff) >> shift - sub v17.8h, \thresh_vec, v17.8h // threshold - (abs(diff) >> shift) - sub v21.8h, \thresh_vec, v21.8h // threshold - (abs(diff) >> shift) - smax v17.8h, v29.8h, v17.8h // imax(0, threshold - ()) - smax v21.8h, v29.8h, v21.8h // imax(0, threshold - ()) + uqsub v17.8h, \thresh_vec, v17.8h // imax(0, threshold - (abs(diff) >> shift)) + uqsub v21.8h, \thresh_vec, v21.8h // imax(0, threshold - (abs(diff) >> shift)) cmhi v18.8h, v0.8h, \s1\().8h // px > p0 cmhi v22.8h, v0.8h, \s2\().8h // px > p1 smin v17.8h, v17.8h, v16.8h // imin(abs(diff), imax()) @@ -334,7 +332,6 @@ function cdef_filter\w\()_neon, export=1 add x5, x9, w5, uxtw #1 movi v31.16b, #255 movi v30.8h, #15 - movi v29.8h, #0 dup v28.8h, w6 // damping ushr v31.8h, v31.8h, #1 // INT16_MAX @@ -344,10 +341,8 @@ function cdef_filter\w\()_neon, export=1 clz v26.8h, v27.8h // clz(threshold) sub v24.8h, v30.8h, v24.8h // ulog2(threshold) sub v26.8h, v30.8h, v26.8h // ulog2(threshold) - sub v24.8h, v28.8h, v24.8h // damping - ulog2(threshold) - sub v26.8h, v28.8h, v26.8h // damping - ulog2(threshold) - smax v24.8h, v29.8h, v24.8h // shift = imax(0, damping - ulog2(threshold)) - smax v26.8h, v29.8h, v26.8h // shift = imax(0, damping - ulog2(threshold)) + uqsub v24.8h, v28.8h, v24.8h // shift = imax(0, damping - ulog2(threshold)) + uqsub v26.8h, v28.8h, v26.8h // shift = imax(0, damping - ulog2(threshold)) neg v24.8h, v24.8h // -shift neg v26.8h, v26.8h // -shift |