GitLab

intra_pred_paeth_w4_8bpc_c: 561.6
intra_pred_paeth_w4_8bpc_ssse3: 49.2
intra_pred_paeth_w8_8bpc_c: 1475.8
intra_pred_paeth_w8_8bpc_ssse3: 103.0
intra_pred_paeth_w16_8bpc_c: 4697.8
intra_pred_paeth_w16_8bpc_ssse3: 279.0
intra_pred_paeth_w32_8bpc_c: 13245.1
intra_pred_paeth_w32_8bpc_ssse3: 614.7
intra_pred_paeth_w64_8bpc_c: 32638.9
intra_pred_paeth_w64_8bpc_ssse3: 1477.6

This eases disambiguating these functions when looking at perf
profiles.

The width register has been set to clz(w)-24, not the other way
around. And the 32 bit prep function has got the h parameter in
r4, not in r5.

For cases with indented, nested .if/.macro in asm.S, ident those
by 4 chars.

Some initial assembly files were indented to 4/16 columns, while all
the actual implementation files, starting with src/arm/64/mc.S, have
used 8/24 for indentation.

cfl_ac_444_w4_8bpc_c: 978.2
cfl_ac_444_w4_8bpc_ssse3: 110.4
cfl_ac_444_w8_8bpc_c: 2312.3
cfl_ac_444_w8_8bpc_ssse3: 197.5
cfl_ac_444_w16_8bpc_c: 4081.1
cfl_ac_444_w16_8bpc_ssse3: 274.1
cfl_ac_444_w32_8bpc_c: 9544.3
cfl_ac_444_w32_8bpc_ssse3: 617.1

Port of 65ee1233 for AVX-2
from Kyle Siefring to SSE41, and optimize SSSE3.

---------------------
x86_64:
------------------------------------------
before: cdef_dir_8bpc_ssse3: 110.3
 after: cdef_dir_8bpc_ssse3: 105.9
   new: cdef_dir_8bpc_sse4:   96.4
------------------------------------------

---------------------
x86_32:
------------------------------------------
before: cdef_dir_8bpc_ssse3: 120.6
 after: cdef_dir_8bpc_ssse3: 110.7
   new: cdef_dir_8bpc_sse4:  106.5
------------------------------------------

Port of c204da0f for AVX-2
from Kyle Siefring.

---------------------
x86_64:
------------------------------------------
before: cdef_filter_4x4_8bpc_ssse3: 141.7
 after: cdef_filter_4x4_8bpc_ssse3: 131.6
before: cdef_filter_4x4_8bpc_sse4: 128.3
 after: cdef_filter_4x4_8bpc_sse4: 119.0
------------------------------------------
before: cdef_filter_4x8_8bpc_ssse3: 253.4
 after: cdef_filter_4x8_8bpc_ssse3: 236.1
before: cdef_filter_4x8_8bpc_sse4: 228.5
 after: cdef_filter_4x8_8bpc_sse4: 213.2
------------------------------------------
before: cdef_filter_8x8_8bpc_ssse3: 429.6
 after: cdef_filter_8x8_8bpc_ssse3: 386.9
before: cdef_filter_8x8_8bpc_sse4: 379.9
 after: cdef_filter_8x8_8bpc_sse4: 335.9
------------------------------------------

---------------------
x86_32:
------------------------------------------
before: cdef_filter_4x4_8bpc_ssse3: 184.3
 after: cdef_filter_4x4_8bpc_ssse3: 163.3
before: cdef_filter_4x4_8bpc_sse4: 168.9
 after: cdef_filter_4x4_8bpc_sse4: 146.1
------------------------------------------
before: cdef_filter_4x8_8bpc_ssse3: 335.3
 after: cdef_filter_4x8_8bpc_ssse3: 280.7
before: cdef_filter_4x8_8bpc_sse4: 305.1
 after: cdef_filter_4x8_8bpc_sse4: 257.9
------------------------------------------
before: cdef_filter_8x8_8bpc_ssse3: 579.1
 after: cdef_filter_8x8_8bpc_ssse3: 500.5
before: cdef_filter_8x8_8bpc_sse4: 517.0
 after: cdef_filter_8x8_8bpc_sse4: 455.8
------------------------------------------

Port of dc2ae517 for AVX-2
from Kyle Siefring.

---------------------
x86_64:
------------------------------------------
cdef_filter_4x4_8bpc_ssse3: 141.7
cdef_filter_4x4_8bpc_sse4: 128.3
------------------------------------------
cdef_filter_4x8_8bpc_ssse3: 253.4
cdef_filter_4x8_8bpc_sse4: 228.5
------------------------------------------
cdef_filter_8x8_8bpc_ssse3: 429.6
cdef_filter_8x8_8bpc_sse4: 379.9
------------------------------------------

---------------------
x86_32:
------------------------------------------
cdef_filter_4x4_8bpc_ssse3: 184.3
cdef_filter_4x4_8bpc_sse4: 168.9
------------------------------------------
cdef_filter_4x8_8bpc_ssse3: 335.3
cdef_filter_4x8_8bpc_sse4: 305.1
------------------------------------------
cdef_filter_8x8_8bpc_ssse3: 579.1
cdef_filter_8x8_8bpc_sse4: 517.0
------------------------------------------

Cycle times:
inv_txfm_add_16x32_dct_dct_0_8bpc_c: 2464.6
inv_txfm_add_16x32_dct_dct_0_8bpc_ssse3: 121.6
inv_txfm_add_16x32_dct_dct_1_8bpc_c: 24751.6
inv_txfm_add_16x32_dct_dct_1_8bpc_ssse3: 1101.9
inv_txfm_add_16x32_dct_dct_2_8bpc_c: 24377.0
inv_txfm_add_16x32_dct_dct_2_8bpc_ssse3: 1117.2
inv_txfm_add_16x32_dct_dct_3_8bpc_c: 24155.6
inv_txfm_add_16x32_dct_dct_3_8bpc_ssse3: 2349.3
inv_txfm_add_16x32_dct_dct_4_8bpc_c: 24175.6
inv_txfm_add_16x32_dct_dct_4_8bpc_ssse3: 1642.0
inv_txfm_add_16x32_identity_identity_0_8bpc_c: 10304.7
inv_txfm_add_16x32_identity_identity_0_8bpc_ssse3: 137.7
inv_txfm_add_16x32_identity_identity_1_8bpc_c: 10341.6
inv_txfm_add_16x32_identity_identity_1_8bpc_ssse3: 137.9
inv_txfm_add_16x32_identity_identity_2_8bpc_c: 10299.9
inv_txfm_add_16x32_identity_identity_2_8bpc_ssse3: 253.9
inv_txfm_add_16x32_identity_identity_3_8bpc_c: 10331.4
inv_txfm_add_16x32_identity_identity_3_8bpc_ssse3: 369.7
inv_txfm_add_16x32_identity_identity_4_8bpc_c: 10360.4
inv_txfm_add_16x32_identity_identity_4_8bpc_ssse3: 484.0
inv_txfm_add_32x16_dct_dct_0_8bpc_c: 2288.4
inv_txfm_add_32x16_dct_dct_0_8bpc_ssse3: 142.3
inv_txfm_add_32x16_dct_dct_1_8bpc_c: 23819.9
inv_txfm_add_32x16_dct_dct_1_8bpc_ssse3: 1740.1
inv_txfm_add_32x16_dct_dct_2_8bpc_c: 23755.8
inv_txfm_add_32x16_dct_dct_2_8bpc_ssse3: 1641.4
inv_txfm_add_32x16_dct_dct_3_8bpc_c: 23839.9
inv_txfm_add_32x16_dct_dct_3_8bpc_ssse3: 1559.0
inv_txfm_add_32x16_dct_dct_4_8bpc_c: 23757.7
inv_txfm_add_32x16_dct_dct_4_8bpc_ssse3: 1579.0
inv_txfm_add_32x16_identity_identity_0_8bpc_c: 10381.7
inv_txfm_add_32x16_identity_identity_0_8bpc_ssse3: 126.3
inv_txfm_add_32x16_identity_identity_1_8bpc_c: 10402.5
inv_txfm_add_32x16_identity_identity_1_8bpc_ssse3: 126.5
inv_txfm_add_32x16_identity_identity_2_8bpc_c: 10429.2
inv_txfm_add_32x16_identity_identity_2_8bpc_ssse3: 244.9
inv_txfm_add_32x16_identity_identity_3_8bpc_c: 10382.0
inv_txfm_add_32x16_identity_identity_3_8bpc_ssse3: 491.0
inv_txfm_add_32x16_identity_identity_4_8bpc_c: 10381.0
inv_txfm_add_32x16_identity_identity_4_8bpc_ssse3: 468.0
inv_txfm_add_32x32_dct_dct_0_8bpc_c: 4168.2
inv_txfm_add_32x32_dct_dct_0_8bpc_ssse3: 204.0
inv_txfm_add_32x32_dct_dct_1_8bpc_c: 46306.2
inv_txfm_add_32x32_dct_dct_1_8bpc_ssse3: 2216.0
inv_txfm_add_32x32_dct_dct_2_8bpc_c: 46300.2
inv_txfm_add_32x32_dct_dct_2_8bpc_ssse3: 2194.2
inv_txfm_add_32x32_dct_dct_3_8bpc_c: 46350.1
inv_txfm_add_32x32_dct_dct_3_8bpc_ssse3: 3484.4
inv_txfm_add_32x32_dct_dct_4_8bpc_c: 46318.1
inv_txfm_add_32x32_dct_dct_4_8bpc_ssse3: 3440.9
inv_txfm_add_32x32_identity_identity_0_8bpc_c: 14663.1
inv_txfm_add_32x32_identity_identity_0_8bpc_ssse3: 179.0
inv_txfm_add_32x32_identity_identity_1_8bpc_c: 14737.0
inv_txfm_add_32x32_identity_identity_1_8bpc_ssse3: 179.2
inv_txfm_add_32x32_identity_identity_2_8bpc_c: 14640.4
inv_txfm_add_32x32_identity_identity_2_8bpc_ssse3: 179.1
inv_txfm_add_32x32_identity_identity_3_8bpc_c: 14638.5
inv_txfm_add_32x32_identity_identity_3_8bpc_ssse3: 663.8
inv_txfm_add_32x32_identity_identity_4_8bpc_c: 14635.6
inv_txfm_add_32x32_identity_identity_4_8bpc_ssse3: 663.9

As meson still doesn't allow specifying different cflags between
static and dynamic libraries, this still includes the dllexport
in the static library when built with default_library=both, but
it at least is avoided in static-only builds, and avoids
defining these symbols as dllexport in the callers' translation
units.

The second shift is constant.

Cycle times:
inv_txfm_add_8x32_dct_dct_0_8bpc_c: 1164.7
inv_txfm_add_8x32_dct_dct_0_8bpc_ssse3: 79.5
inv_txfm_add_8x32_dct_dct_1_8bpc_c: 11291.6
inv_txfm_add_8x32_dct_dct_1_8bpc_ssse3: 508.5
inv_txfm_add_8x32_dct_dct_2_8bpc_c: 10720.4
inv_txfm_add_8x32_dct_dct_2_8bpc_ssse3: 507.9
inv_txfm_add_8x32_dct_dct_3_8bpc_c: 12351.5
inv_txfm_add_8x32_dct_dct_3_8bpc_ssse3: 687.2
inv_txfm_add_8x32_dct_dct_4_8bpc_c: 10402.3
inv_txfm_add_8x32_dct_dct_4_8bpc_ssse3: 687.9
inv_txfm_add_8x32_identity_identity_0_8bpc_c: 3485.0
inv_txfm_add_8x32_identity_identity_0_8bpc_ssse3: 97.7
inv_txfm_add_8x32_identity_identity_1_8bpc_c: 3495.7
inv_txfm_add_8x32_identity_identity_1_8bpc_ssse3: 97.7
inv_txfm_add_8x32_identity_identity_2_8bpc_c: 3503.7
inv_txfm_add_8x32_identity_identity_2_8bpc_ssse3: 97.8
inv_txfm_add_8x32_identity_identity_3_8bpc_c: 3489.5
inv_txfm_add_8x32_identity_identity_3_8bpc_ssse3: 184.4
inv_txfm_add_8x32_identity_identity_4_8bpc_c: 3498.1
inv_txfm_add_8x32_identity_identity_4_8bpc_ssse3: 182.8
inv_txfm_add_32x8_dct_dct_0_8bpc_c: 1220.4
inv_txfm_add_32x8_dct_dct_0_8bpc_ssse3: 65.6
inv_txfm_add_32x8_dct_dct_1_8bpc_c: 11120.7
inv_txfm_add_32x8_dct_dct_1_8bpc_ssse3: 623.8
inv_txfm_add_32x8_dct_dct_2_8bpc_c: 12236.3
inv_txfm_add_32x8_dct_dct_2_8bpc_ssse3: 624.7
inv_txfm_add_32x8_dct_dct_3_8bpc_c: 10866.3
inv_txfm_add_32x8_dct_dct_3_8bpc_ssse3: 694.1
inv_txfm_add_32x8_dct_dct_4_8bpc_c: 10322.8
inv_txfm_add_32x8_dct_dct_4_8bpc_ssse3: 692.5
inv_txfm_add_32x8_identity_identity_0_8bpc_c: 3368.1
inv_txfm_add_32x8_identity_identity_0_8bpc_ssse3: 98.6
inv_txfm_add_32x8_identity_identity_1_8bpc_c: 3381.1
inv_txfm_add_32x8_identity_identity_1_8bpc_ssse3: 98.3
inv_txfm_add_32x8_identity_identity_2_8bpc_c: 3376.6
inv_txfm_add_32x8_identity_identity_2_8bpc_ssse3: 98.3
inv_txfm_add_32x8_identity_identity_3_8bpc_c: 3364.3
inv_txfm_add_32x8_identity_identity_3_8bpc_ssse3: 182.2
inv_txfm_add_32x8_identity_identity_4_8bpc_c: 3390.0
inv_txfm_add_32x8_identity_identity_4_8bpc_ssse3: 182.2

cfl_ac_420_w4_8bpc_c: 1621.0
cfl_ac_420_w4_8bpc_ssse3: 92.5
cfl_ac_420_w8_8bpc_c: 3344.1
cfl_ac_420_w8_8bpc_ssse3: 115.4
cfl_ac_420_w16_8bpc_c: 6024.9
cfl_ac_420_w16_8bpc_ssse3: 187.8
cfl_ac_422_w4_8bpc_c: 1762.5
cfl_ac_422_w4_8bpc_ssse3: 81.4
cfl_ac_422_w8_8bpc_c: 4941.2
cfl_ac_422_w8_8bpc_ssse3: 166.5
cfl_ac_422_w16_8bpc_c: 8261.8
cfl_ac_422_w16_8bpc_ssse3: 272.3

This check was already done in dav1d_parse_obus(), so it's added as an assert
here for extra precaution.

Its previous contents don't need to be preserved.

Fixes tests on big endian architectures.

And the API version as the file version.

This optimization is so small 10 runs with a fixed seed were needed
to get some relevant numbers. This has been done for 3x3 case only.

before:
mean=113265.42
stddev=954.392

after:
mean=112654.71
stddev=884.833

This optimization is so tiny we can't even see it in checkasm.
The only actual difference being the removal of a memory load, it has to
be better.

Refs #241, Closes #255.

Increments the soname revision number for this behavior change.
Removes the DAV1D_VERSION and DAV1D_VERSION_INT defines and
dav1d_version_vcs() and dav1d_version_int().
Also cleans up the version usage in dav1d CLI.
Refs #241, #255.

```------------------
x86_64:
```

---------------------------------------
cdef_dir_8bpc_c: 1023.1
cdef_dir_8bpc_ssse3: 110.3
cdef_dir_8bpc_avx2: 71.1
------------------------------------------

---------------------
x86_32:
------------------------------------------
cdef_dir_8bpc_c: 1074.8
cdef_dir_8bpc_ssse3: 120.6
------------------------------------------

Thanks to Ronald for the AVX2 XMM version which was a very good starting
point.

Before:
cdef_filter_8x8_8bpc_avx2: 252.3
cdef_filter_4x8_8bpc_avx2: 182.1
cdef_filter_4x4_8bpc_avx2: 105.7

After:
cdef_filter_8x8_8bpc_avx2: 235.5
cdef_filter_4x8_8bpc_avx2: 174.8
cdef_filter_4x4_8bpc_avx2: 101.8

This might have said pri_taps[k]/sec_taps[k] at some earlier time.

Pad with a value which works both as a large unsigned value and a
negative signed value. This allows doing the max operation using
signed max, avoiding the conditional altogether.

Based on the same idea for x86 by Kyle Siefring.

Before:                  Cortex A53     A72     A73
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
After:
cdef_filter_4x4_8bpc_neon:    596.3   377.8   384.8
cdef_filter_4x8_8bpc_neon:   1097.4   705.5   707.1
cdef_filter_8x8_8bpc_neon:   1967.4  1232.3  1239.9

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

Before:
```
cdef_filter_8x8_8bpc_avx2: 275.5
cdef_filter_4x8_8bpc_avx2: 193.3
cdef_filter_4x4_8bpc_avx2: 113.5
```
After:
```
cdef_filter_8x8_8bpc_avx2: 252.3
cdef_filter_4x8_8bpc_avx2: 182.1
cdef_filter_4x4_8bpc_avx2: 105.7
```