From cb712ff37d3c20a21695e00c52fff213a6fd40b4 Mon Sep 17 00:00:00 2001
From: Wim <wim@42.be>
Date: Sun, 16 Jun 2019 23:33:25 +0200
Subject: Update vendor (#852)

---
 .../x/crypto/internal/chacha20/chacha_ppc64le.go   | 51 ++++++++++++++++++++++
 1 file changed, 51 insertions(+)
 create mode 100644 vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go

(limited to 'vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go')

diff --git a/vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go b/vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go
new file mode 100644
index 00000000..9bd6df64
--- /dev/null
+++ b/vendor/golang.org/x/crypto/internal/chacha20/chacha_ppc64le.go
@@ -0,0 +1,51 @@
+// Copyright 2019 The Go Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style
+// license that can be found in the LICENSE file.
+
+// +build ppc64le,!gccgo,!appengine
+
+package chacha20
+
+import "encoding/binary"
+
+var haveAsm = true
+
+const bufSize = 256
+
+//go:noescape
+func chaCha20_ctr32_vmx(out, inp *byte, len int, key *[8]uint32, counter *uint32)
+
+func (c *Cipher) xorKeyStreamAsm(dst, src []byte) {
+	if len(src) >= bufSize {
+		chaCha20_ctr32_vmx(&dst[0], &src[0], len(src)-len(src)%bufSize, &c.key, &c.counter)
+	}
+	if len(src)%bufSize != 0 {
+		chaCha20_ctr32_vmx(&c.buf[0], &c.buf[0], bufSize, &c.key, &c.counter)
+		start := len(src) - len(src)%bufSize
+		ts, td, tb := src[start:], dst[start:], c.buf[:]
+		// Unroll loop to XOR 32 bytes per iteration.
+		for i := 0; i < len(ts)-32; i += 32 {
+			td, tb = td[:len(ts)], tb[:len(ts)] // bounds check elimination
+			s0 := binary.LittleEndian.Uint64(ts[0:8])
+			s1 := binary.LittleEndian.Uint64(ts[8:16])
+			s2 := binary.LittleEndian.Uint64(ts[16:24])
+			s3 := binary.LittleEndian.Uint64(ts[24:32])
+			b0 := binary.LittleEndian.Uint64(tb[0:8])
+			b1 := binary.LittleEndian.Uint64(tb[8:16])
+			b2 := binary.LittleEndian.Uint64(tb[16:24])
+			b3 := binary.LittleEndian.Uint64(tb[24:32])
+			binary.LittleEndian.PutUint64(td[0:8], s0^b0)
+			binary.LittleEndian.PutUint64(td[8:16], s1^b1)
+			binary.LittleEndian.PutUint64(td[16:24], s2^b2)
+			binary.LittleEndian.PutUint64(td[24:32], s3^b3)
+			ts, td, tb = ts[32:], td[32:], tb[32:]
+		}
+		td, tb = td[:len(ts)], tb[:len(ts)] // bounds check elimination
+		for i, v := range ts {
+			td[i] = tb[i] ^ v
+		}
+		c.len = bufSize - (len(src) % bufSize)
+
+	}
+
+}
-- 
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