Revert "crypto/blake2b: put architecture-dependent features behind bu…

…ild-tag (ethereum#28381)"

This reverts commit 5e9d8bd.

crypto/blake2b/blake2b_f_test.go

@@ -1,6 +1,7 @@
 package blake2b
 
 import (
+ "encoding/binary"
  "fmt"
  "reflect"
  "testing"
@@ -57,3 +58,60 @@ var testVectorsF = []testVector{
  },
  },
 }
+
+func Fuzz(f *testing.F) {
+ f.Fuzz(func(t *testing.T, data []byte) {
+ fuzz(data)
+ })
+}
+
+func fuzz(data []byte) {
+ // Make sure the data confirms to the input model
+ if len(data) != 211 {
+ return
+ }
+ // Parse everything and call all the implementations
+ var (
+ rounds = binary.BigEndian.Uint16(data[0:2])
+
+ h [8]uint64
+ m [16]uint64
+ t [2]uint64
+ f uint64
+ )
+
+ for i := 0; i < 8; i++ {
+ offset := 2 + i*8
+ h[i] = binary.LittleEndian.Uint64(data[offset : offset+8])
+ }
+ for i := 0; i < 16; i++ {
+ offset := 66 + i*8
+ m[i] = binary.LittleEndian.Uint64(data[offset : offset+8])
+ }
+ t[0] = binary.LittleEndian.Uint64(data[194:202])
+ t[1] = binary.LittleEndian.Uint64(data[202:210])
+
+ if data[210]%2 == 1 { // Avoid spinning the fuzzer to hit 0/1
+ f = 0xFFFFFFFFFFFFFFFF
+ }
+
+ // Run the blake2b compression on all instruction sets and cross reference
+ want := h
+ fGeneric(&want, &m, t[0], t[1], f, uint64(rounds))
+
+ have := h
+ fSSE4(&have, &m, t[0], t[1], f, uint64(rounds))
+ if have != want {
+ panic("SSE4 mismatches generic algo")
+ }
+ have = h
+ fAVX(&have, &m, t[0], t[1], f, uint64(rounds))
+ if have != want {
+ panic("AVX mismatches generic algo")
+ }
+ have = h
+ fAVX2(&have, &m, t[0], t[1], f, uint64(rounds))
+ if have != want {
+ panic("AVX2 mismatches generic algo")
+ }
+}