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author | OpenShift Merge Robot <openshift-merge-robot@users.noreply.github.com> | 2020-08-28 08:23:59 -0400 |
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committer | GitHub <noreply@github.com> | 2020-08-28 08:23:59 -0400 |
commit | 74bdf52c401dd1c9cd3c636d4fa8ea94e7c88ef3 (patch) | |
tree | af0904e9ec643dea2caa8d39a55764adc38c069f /vendor/golang.org/x/crypto/poly1305/sum_s390x.go | |
parent | 061c93f70101026d79cca6e75ac0c565e1fa99ec (diff) | |
parent | 90a86cad3a6f007c6708406d8a78528fbb302a0a (diff) | |
download | podman-74bdf52c401dd1c9cd3c636d4fa8ea94e7c88ef3.tar.gz podman-74bdf52c401dd1c9cd3c636d4fa8ea94e7c88ef3.tar.bz2 podman-74bdf52c401dd1c9cd3c636d4fa8ea94e7c88ef3.zip |
Merge pull request #7472 from containers/dependabot/go_modules/k8s.io/apimachinery-0.19.0
Bump k8s.io/apimachinery from 0.18.8 to 0.19.0
Diffstat (limited to 'vendor/golang.org/x/crypto/poly1305/sum_s390x.go')
-rw-r--r-- | vendor/golang.org/x/crypto/poly1305/sum_s390x.go | 72 |
1 files changed, 54 insertions, 18 deletions
diff --git a/vendor/golang.org/x/crypto/poly1305/sum_s390x.go b/vendor/golang.org/x/crypto/poly1305/sum_s390x.go index 5f91ff84a..958fedc07 100644 --- a/vendor/golang.org/x/crypto/poly1305/sum_s390x.go +++ b/vendor/golang.org/x/crypto/poly1305/sum_s390x.go @@ -2,7 +2,7 @@ // Use of this source code is governed by a BSD-style // license that can be found in the LICENSE file. -// +build go1.11,!gccgo,!purego +// +build !gccgo,!purego package poly1305 @@ -10,30 +10,66 @@ import ( "golang.org/x/sys/cpu" ) -// poly1305vx is an assembly implementation of Poly1305 that uses vector +// updateVX is an assembly implementation of Poly1305 that uses vector // instructions. It must only be called if the vector facility (vx) is // available. //go:noescape -func poly1305vx(out *[16]byte, m *byte, mlen uint64, key *[32]byte) +func updateVX(state *macState, msg []byte) -// poly1305vmsl is an assembly implementation of Poly1305 that uses vector -// instructions, including VMSL. It must only be called if the vector facility (vx) is -// available and if VMSL is supported. -//go:noescape -func poly1305vmsl(out *[16]byte, m *byte, mlen uint64, key *[32]byte) +// mac is a replacement for macGeneric that uses a larger buffer and redirects +// calls that would have gone to updateGeneric to updateVX if the vector +// facility is installed. +// +// A larger buffer is required for good performance because the vector +// implementation has a higher fixed cost per call than the generic +// implementation. +type mac struct { + macState + + buffer [16 * TagSize]byte // size must be a multiple of block size (16) + offset int +} -func sum(out *[16]byte, m []byte, key *[32]byte) { - if cpu.S390X.HasVX { - var mPtr *byte - if len(m) > 0 { - mPtr = &m[0] +func (h *mac) Write(p []byte) (int, error) { + nn := len(p) + if h.offset > 0 { + n := copy(h.buffer[h.offset:], p) + if h.offset+n < len(h.buffer) { + h.offset += n + return nn, nil } - if cpu.S390X.HasVXE && len(m) > 256 { - poly1305vmsl(out, mPtr, uint64(len(m)), key) + p = p[n:] + h.offset = 0 + if cpu.S390X.HasVX { + updateVX(&h.macState, h.buffer[:]) } else { - poly1305vx(out, mPtr, uint64(len(m)), key) + updateGeneric(&h.macState, h.buffer[:]) } - } else { - sumGeneric(out, m, key) } + + tail := len(p) % len(h.buffer) // number of bytes to copy into buffer + body := len(p) - tail // number of bytes to process now + if body > 0 { + if cpu.S390X.HasVX { + updateVX(&h.macState, p[:body]) + } else { + updateGeneric(&h.macState, p[:body]) + } + } + h.offset = copy(h.buffer[:], p[body:]) // copy tail bytes - can be 0 + return nn, nil +} + +func (h *mac) Sum(out *[TagSize]byte) { + state := h.macState + remainder := h.buffer[:h.offset] + + // Use the generic implementation if we have 2 or fewer blocks left + // to sum. The vector implementation has a higher startup time. + if cpu.S390X.HasVX && len(remainder) > 2*TagSize { + updateVX(&state, remainder) + } else if len(remainder) > 0 { + updateGeneric(&state, remainder) + } + finalize(out, &state.h, &state.s) } |