diff --git a/crypto/aes/asm/bsaes-x86_64.pl b/crypto/aes/asm/bsaes-x86_64.pl
index bbc86add36b0606dcf0102ce30a84c7d1b5bc7a2..34ea2f818d2b004cee5577683cf50f2700aec437 100644
--- a/crypto/aes/asm/bsaes-x86_64.pl
+++ b/crypto/aes/asm/bsaes-x86_64.pl
@@ -1152,27 +1152,44 @@ ___
 }
 $code.=<<___;
 .align	64
-.LBS0:	.quad	0x5555555555555555, 0x5555555555555555
-.LBS1:	.quad	0x3333333333333333, 0x3333333333333333
-.LBS2:	.quad	0x0f0f0f0f0f0f0f0f, 0x0f0f0f0f0f0f0f0f
-.LSR:	.quad	0x0504070600030201, 0x0f0e0d0c0a09080b
-.LSRM0:	.quad	0x0304090e00050a0f, 0x01060b0c0207080d
-.LM0:	.quad	0x02060a0e03070b0f, 0x0004080c0105090d
-.LM0SR:	.quad	0x0a0e02060f03070b, 0x0004080c05090d01
-.LNOT:	.quad	0xffffffffffffffff, 0xffffffffffffffff
-.L63:	.quad	0x6363636363636363, 0x6363636363636363
-.LSWPUP:
+.LBS0:		# bit-slice constants
+	.quad	0x5555555555555555, 0x5555555555555555
+.LBS1:
+	.quad	0x3333333333333333, 0x3333333333333333
+.LBS2:
+	.quad	0x0f0f0f0f0f0f0f0f, 0x0f0f0f0f0f0f0f0f
+.LSR:		# shiftrows constants
+	.quad	0x0504070600030201, 0x0f0e0d0c0a09080b
+.LSRM0:
+	.quad	0x0304090e00050a0f, 0x01060b0c0207080d
+.LM0:
+	.quad	0x02060a0e03070b0f, 0x0004080c0105090d
+.LM0SR:
+	.quad	0x0a0e02060f03070b, 0x0004080c05090d01
+.LNOT:		# magic constants
+	.quad	0xffffffffffffffff, 0xffffffffffffffff
+.L63:
+	.quad	0x6363636363636363, 0x6363636363636363
+.LSWPUP:	# byte-swap upper dword
 	.quad	0x0706050403020100, 0x0c0d0e0f0b0a0908
 .LSWPUPM0SR:
 	.quad	0x0a0d02060c03070b, 0x0004080f05090e01
-.LADD1:	.quad	0x0000000000000000, 0x0000000100000000
-.LADD2:	.quad	0x0000000000000000, 0x0000000200000000
-.LADD3:	.quad	0x0000000000000000, 0x0000000300000000
-.LADD4:	.quad	0x0000000000000000, 0x0000000400000000
-.LADD5:	.quad	0x0000000000000000, 0x0000000500000000
-.LADD6:	.quad	0x0000000000000000, 0x0000000600000000
-.LADD7:	.quad	0x0000000000000000, 0x0000000700000000
-.LADD8:	.quad	0x0000000000000000, 0x0000000800000000
+.LADD1:		# counter increment constants
+	.quad	0x0000000000000000, 0x0000000100000000
+.LADD2:
+	.quad	0x0000000000000000, 0x0000000200000000
+.LADD3:
+	.quad	0x0000000000000000, 0x0000000300000000
+.LADD4:
+	.quad	0x0000000000000000, 0x0000000400000000
+.LADD5:
+	.quad	0x0000000000000000, 0x0000000500000000
+.LADD6:
+	.quad	0x0000000000000000, 0x0000000600000000
+.LADD7:
+	.quad	0x0000000000000000, 0x0000000700000000
+.LADD8:
+	.quad	0x0000000000000000, 0x0000000800000000
 .asciz	"Bit-sliced AES for x86_64/SSSE3, Emilia Käsper and Peter Schwabe"
 .align	64
 ___