1 files changed, 85 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 0000000..73981b0
--- /dev/null
+++ b/vendor/github.com/minio/md5-simd/md5-util_amd64.go
@@ -0,0 +1,85 @@
+//+build !noasm,!appengine,gc
+
+// 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
+
+// Helper struct for sorting blocks based on length
+type lane struct {
+        len uint
+        pos uint
+}
+
+type digest struct {
+        s [4]uint32
+}
+
+// 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)}
+                for i := c - 1; i >= 0; i-- {
+                        // swap so largest is at the end...
+                        if sorted[i].len > sorted[i+1].len {
+                                sorted[i], sorted[i+1] = sorted[i+1], sorted[i]
+                                continue
+                        }
+                        break
+                }
+        }
+
+        // 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)}
+                for i := c - 1; i >= 0; i-- {
+                        // swap so largest is at the end...
+                        if sorted[i].len > sorted[i+1].len {
+                                sorted[i], sorted[i+1] = sorted[i+1], sorted[i]
+                                continue
+                        }
+                        break
+                }
+        }
+
+        // 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
+}