dest4-sparcv9.pl: add clarification comment.

	st		%f3, [$ivec + 4]

	st		%f3, [$ivec + 4]

.type	des_t4_cbc_decrypt,#function

.type	des_t4_cbc_decrypt,#function

.size	des_t4_cbc_decrypt,.-des_t4_cbc_decrypt

.size	des_t4_cbc_decrypt,.-des_t4_cbc_decrypt

___

# One might wonder why does one have back-to-back des_iip/des_ip

# pairs between EDE passes. Indeed, aren't they inverse of each other?

# They almost are. Outcome of the pair is 32-bit words being swapped

# in target register. Consider pair of des_iip/des_ip as a way to

# perform the due swap, it's actually fastest way in this case.

$code.=<<___;

.globl	des_t4_ede3_cbc_encrypt

.globl	des_t4_ede3_cbc_encrypt

.align	32

.align	32

des_t4_ede3_cbc_encrypt:

des_t4_ede3_cbc_encrypt: