* zstd: Shorter asm for decSymbol.newState

The asm needs to compute decSymbol.newState, which is

	uint16(state >> 16),

or, equivalently (except for types),

	uint32(state) >> 16.

This can be accomplished by a MOVL+SHRL, the former of which is elided
by avo, so we get a single instruction for both the BMI2 and non-BMI2
cases.

Benchmarks show no difference on a new BMI2-supporting machine, but on
an older i7, decompression throughput is a tiny bit faster:

	goos: linux
	goarch: amd64
	pkg: github.com/klauspost/compress/zstd
	cpu: Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz
	                                       │     old      │                shift                │
	                                       │     B/s      │     B/s       vs base               │
	Decoder_DecodeAll/kppkn.gtb.zst-8        441.4Mi ± 2%   450.4Mi ± 0%  +2.03% (p=0.000 n=10)
	Decoder_DecodeAll/geo.protodata.zst-8    1.148Gi ± 1%   1.152Gi ± 0%  +0.34% (p=0.009 n=10)
	Decoder_DecodeAll/plrabn12.txt.zst-8     347.9Mi ± 0%   356.6Mi ± 1%  +2.48% (p=0.000 n=10)
	Decoder_DecodeAll/lcet10.txt.zst-8       417.4Mi ± 0%   427.3Mi ± 0%  +2.37% (p=0.000 n=10)
	Decoder_DecodeAll/asyoulik.txt.zst-8     347.1Mi ± 0%   352.7Mi ± 1%  +1.62% (p=0.003 n=10)
	Decoder_DecodeAll/alice29.txt.zst-8      346.3Mi ± 1%   352.6Mi ± 0%  +1.83% (p=0.000 n=10)
	Decoder_DecodeAll/html_x_4.zst-8         1.440Gi ± 0%   1.445Gi ± 0%  +0.29% (p=0.019 n=10)
	Decoder_DecodeAll/paper-100k.pdf.zst-8   4.191Gi ± 0%   4.210Gi ± 0%  +0.45% (p=0.007 n=10)
	Decoder_DecodeAll/fireworks.jpeg.zst-8   8.891Gi ± 0%   8.849Gi ± 0%  -0.47% (p=0.000 n=10)
	Decoder_DecodeAll/urls.10K.zst-8         589.6Mi ± 0%   600.2Mi ± 0%  +1.80% (p=0.001 n=10)
	Decoder_DecodeAll/html.zst-8             926.1Mi ± 1%   937.9Mi ± 0%  +1.27% (p=0.000 n=10)
	Decoder_DecodeAll/comp-data.bin.zst-8    389.6Mi ± 0%   395.1Mi ± 0%  +1.40% (p=0.000 n=10)
	geomean                                  832.6Mi        843.3Mi       +1.28%

* zstd: Remove unused parameter in asm generator

…lly update them (#899)

* ci: hashpin sensitive workflow dependencies

Signed-off-by: Diogo Teles Sant'Anna <diogoteles@google.com>

* ci: configure dependabot to update workflow dependencies

Signed-off-by: Diogo Teles Sant'Anna <diogoteles@google.com>

---------

Signed-off-by: Diogo Teles Sant'Anna <diogoteles@google.com>

Bumps the github-actions group with 4 updates: [actions/checkout](https://github.com/actions/checkout), [github/codeql-action](https://github.com/github/codeql-action), [actions/setup-go](https://github.com/actions/setup-go) and [goreleaser/goreleaser-action](https://github.com/goreleaser/goreleaser-action).


Updates `actions/checkout` from 2 to 4
- [Release notes](https://github.com/actions/checkout/releases)
- [Commits](actions/checkout@v2...v4)

Updates `github/codeql-action` from 2.22.11 to 3.22.11
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](github/codeql-action@03e7845...b374143)

Updates `actions/setup-go` from 2 to 5
- [Release notes](https://github.com/actions/setup-go/releases)
- [Commits](actions/setup-go@v2...v5)

Updates `goreleaser/goreleaser-action` from 2.9.1 to 5.0.0
- [Release notes](https://github.com/goreleaser/goreleaser-action/releases)
- [Commits](goreleaser/goreleaser-action@b953231...7ec5c2b)

---
updated-dependencies:
- dependency-name: actions/checkout
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: github/codeql-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: actions/setup-go
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
- dependency-name: goreleaser/goreleaser-action
  dependency-type: direct:production
  update-type: version-update:semver-major
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

* Update generator and executable go.mod
* Update sum files

Bumps the github-actions group with 1 update: [github/codeql-action](https://github.com/github/codeql-action).


Updates `github/codeql-action` from 3.22.11 to 3.22.12
- [Release notes](https://github.com/github/codeql-action/releases)
- [Changelog](https://github.com/github/codeql-action/blob/main/CHANGELOG.md)
- [Commits](github/codeql-action@b374143...012739e)

---
updated-dependencies:
- dependency-name: github/codeql-action
  dependency-type: direct:production
  update-type: version-update:semver-patch
  dependency-group: github-actions
...

Signed-off-by: dependabot[bot] <support@github.com>
Co-authored-by: dependabot[bot] <49699333+dependabot[bot]@users.noreply.github.com>

Allows to remove the frame header from input and adds a function that encodes current frame header values.

Benchmark results below. On a different machine, I saw somewhat bigger
speedups when benchmarking a version that has the noasm version of FSE,
but asm seqdec. The paper-100k benchmarks have some extreme variance in
the first 12 runs, so I did 12 more to get a more reliable average. The
apparent regression on that benchmark may be a fluke.

The asm FSE decoder still wins.

goos: linux
goarch: amd64
pkg: github.com/klauspost/compress/zstd
cpu: Intel(R) Core(TM) i7-3770K CPU @ 3.50GHz
                                                     │     old      │                 new                 │
                                                     │     B/s      │     B/s       vs base               │
Decoder_DecoderSmall/kppkn.gtb.zst/buffered-8          252.3Mi ± 0%   251.9Mi ± 0%  -0.12% (p=0.027 n=12)
Decoder_DecoderSmall/kppkn.gtb.zst/unbuffered-8        300.2Mi ± 1%   299.5Mi ± 1%       ~ (p=0.977 n=12)
Decoder_DecoderSmall/geo.protodata.zst/buffered-8      702.1Mi ± 0%   701.4Mi ± 0%       ~ (p=0.551 n=12)
Decoder_DecoderSmall/geo.protodata.zst/unbuffered-8    703.1Mi ± 1%   695.9Mi ± 1%       ~ (p=0.178 n=12)
Decoder_DecoderSmall/plrabn12.txt.zst/buffered-8       200.3Mi ± 0%   200.2Mi ± 0%       ~ (p=0.417 n=12)
Decoder_DecoderSmall/plrabn12.txt.zst/unbuffered-8     294.3Mi ± 2%   294.2Mi ± 2%       ~ (p=0.755 n=12)
Decoder_DecoderSmall/lcet10.txt.zst/buffered-8         237.7Mi ± 0%   237.7Mi ± 0%       ~ (p=0.561 n=12)
Decoder_DecoderSmall/lcet10.txt.zst/unbuffered-8       315.7Mi ± 1%   313.0Mi ± 2%       ~ (p=0.713 n=12)
Decoder_DecoderSmall/asyoulik.txt.zst/buffered-8       205.7Mi ± 3%   212.8Mi ± 0%  +3.43% (p=0.002 n=12)
Decoder_DecoderSmall/asyoulik.txt.zst/unbuffered-8     267.1Mi ± 2%   273.4Mi ± 4%       ~ (p=0.078 n=12)
Decoder_DecoderSmall/alice29.txt.zst/buffered-8        194.8Mi ± 0%   194.8Mi ± 0%       ~ (p=0.876 n=12)
Decoder_DecoderSmall/alice29.txt.zst/unbuffered-8      219.8Mi ± 2%   221.5Mi ± 1%       ~ (p=0.410 n=12)
Decoder_DecoderSmall/html_x_4.zst/buffered-8           1.512Gi ± 1%   1.550Gi ± 0%  +2.49% (p=0.000 n=12)
Decoder_DecoderSmall/html_x_4.zst/unbuffered-8         1.149Gi ± 2%   1.196Gi ± 2%  +4.09% (p=0.000 n=12)
Decoder_DecoderSmall/paper-100k.pdf.zst/buffered-8     2.504Gi ± 1%   2.513Gi ± 0%       ~ (p=0.136 n=24)
Decoder_DecoderSmall/paper-100k.pdf.zst/unbuffered-8   1.041Gi ± 3%   1.023Gi ± 0%  -1.72% (p=0.002 n=24)
Decoder_DecoderSmall/fireworks.jpeg.zst/buffered-8     6.315Gi ± 0%   6.349Gi ± 0%  +0.53% (p=0.000 n=12)
Decoder_DecoderSmall/fireworks.jpeg.zst/unbuffered-8   3.178Gi ± 3%   3.234Gi ± 2%       ~ (p=0.713 n=12)
Decoder_DecoderSmall/urls.10K.zst/buffered-8           350.9Mi ± 0%   351.0Mi ± 0%       ~ (p=1.000 n=12)
Decoder_DecoderSmall/urls.10K.zst/unbuffered-8         525.8Mi ± 1%   524.9Mi ± 3%       ~ (p=0.671 n=12)
Decoder_DecoderSmall/html.zst/buffered-8               562.0Mi ± 0%   561.2Mi ± 0%       ~ (p=0.054 n=12)
Decoder_DecoderSmall/html.zst/unbuffered-8             537.4Mi ± 2%   543.5Mi ± 2%       ~ (p=0.178 n=12)
Decoder_DecoderSmall/comp-data.bin.zst/buffered-8      283.4Mi ± 0%   283.8Mi ± 0%       ~ (p=0.164 n=12)
Decoder_DecoderSmall/comp-data.bin.zst/unbuffered-8    118.0Mi ± 1%   120.3Mi ± 3%       ~ (p=0.128 n=12)
geomean                                                505.1Mi        508.1Mi       +0.60%

Dictionary was being ignored when compressing with a custom window size.

Fixes #911

Limit the default window size to 8MB.

…r custom use (#916)

The spec writes that 0xfe must not be interpreted by decompressors, so
setting up a callback should be denied.

I left 0xfe open for use by the Writer, as it could maybe be valid for a
user to handle padding manually.

Co-authored-by: Klaus Post <klauspost@gmail.com>