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Index: lib/libmd/Makefile
===================================================================
--- lib/libmd/Makefile
+++ lib/libmd/Makefile
@@ -116,12 +116,12 @@
SRCS+= rmd160.S
CFLAGS+= -DRMD160_ASM
.endif
-#.if exists(${MACHINE_ARCH}/skein_block_asm.S)
-## Fully unroll all loops in the assembly optimized version
-#ACFLAGS+= -DSKEIN_LOOP=0
-#SRCS+= skein_block_asm.S
-#CFLAGS+= -DSKEIN_ASM -DSKEIN_USE_ASM=1792 # list of block functions to replace with assembly: 256+512+1024 = 1792
-#.endif
+.if exists(${MACHINE_ARCH}/skein_block_asm.S)
+# Fully unroll all loops in the assembly optimized version
+ACFLAGS+= -DSKEIN_LOOP=0
+SRCS+= skein_block_asm.S
+CFLAGS+= -DSKEIN_ASM -DSKEIN_USE_ASM=1792 # list of block functions to replace with assembly: 256+512+1024 = 1792
+.endif
.if exists(${MACHINE_ARCH}/sha.S) || exists(${MACHINE_ARCH}/rmd160.S) || exists(${MACHINE_ARCH}/skein_block_asm.S)
ACFLAGS+= -DELF -Wa,--noexecstack
.endif
Index: sys/crypto/skein/amd64/skein_block_asm.S
===================================================================
--- sys/crypto/skein/amd64/skein_block_asm.S
+++ sys/crypto/skein/amd64/skein_block_asm.S
@@ -972,7 +972,7 @@
addReg \reg0 , \reg1 #perform the MIX
RotL64 \reg1 , 1024,%((\_RN0_) % 8),\_Rn1_
xorReg \reg1 , \reg0
-.if ((\_RN0_) && 3) == 3 #time to do key injection?
+.if ((\_RN0_) & 3) == 3 #time to do key injection?
.if _SKEIN_DEBUG
movq %\reg0 , xDebug_1024+8*\w0(%rsp) #save intermediate values for Debug_Round
movq %\reg1 , xDebug_1024+8*\w1(%rsp) # (before inline key injection)

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