1 files changed, 70 insertions, 0 deletions
diff --git a/vendor/github.com/minio/md5-simd/md5-util_amd64.go b/vendor/github.com/minio/md5-simd/md5-util_amd64.go
new file mode 100644
index 0000000000..32bbae4a04
--- /dev/null
+++ b/vendor/github.com/minio/md5-simd/md5-util_amd64.go
@@ -0,0 +1,70 @@
+// Copyright (c) 2020 MinIO Inc. All rights reserved.
+// Use of this source code is governed by a license that can be
+// found in the LICENSE file.
+
+package md5simd
+
+import (
+	"sort"
+)
+
+// Helper struct for sorting blocks based on length
+type lane struct {
+	len uint
+	pos uint
+}
+
+// Helper struct for generating number of rounds in combination with mask for valid lanes
+type maskRounds struct {
+	mask   uint64
+	rounds uint64
+}
+
+func generateMaskAndRounds8(input [8][]byte, mr *[8]maskRounds) (rounds int) {
+	// Sort on blocks length small to large
+	var sorted [8]lane
+	for c, inpt := range input {
+		sorted[c] = lane{uint(len(inpt)), uint(c)}
+	}
+	sort.Slice(sorted[:], func(i, j int) bool { return sorted[i].len < sorted[j].len })
+
+	// Create mask array including 'rounds' (of processing blocks of 64 bytes) between masks
+	m, round := uint64(0xff), uint64(0)
+
+	for _, s := range sorted {
+		if s.len > 0 {
+			if uint64(s.len)>>6 > round {
+				mr[rounds] = maskRounds{m, (uint64(s.len) >> 6) - round}
+				rounds++
+			}
+			round = uint64(s.len) >> 6
+		}
+		m = m & ^(1 << uint(s.pos))
+	}
+	return
+}
+
+func generateMaskAndRounds16(input [16][]byte, mr *[16]maskRounds) (rounds int) {
+
+	// Sort on blocks length small to large
+	var sorted [16]lane
+	for c, inpt := range input {
+		sorted[c] = lane{uint(len(inpt)), uint(c)}
+	}
+	sort.Slice(sorted[:], func(i, j int) bool { return sorted[i].len < sorted[j].len })
+
+	// Create mask array including 'rounds' (of processing blocks of 64 bytes) between masks
+	m, round := uint64(0xffff), uint64(0)
+
+	for _, s := range sorted {
+		if s.len > 0 {
+			if uint64(s.len)>>6 > round {
+				mr[rounds] = maskRounds{m, (uint64(s.len) >> 6) - round}
+				rounds++
+			}
+			round = uint64(s.len) >> 6
+		}
+		m = m & ^(1 << uint(s.pos))
+	}
+	return
+}