\
typedef struct pre##_cbcctx { \
pre##_ctx ctx; /* Underlying cipher context */ \
- uint32 iv[PRE##_BLKSZ / 4]; /* Previous ciphertext or IV */ \
+ uint32 a[PRE##_BLKSZ/4]; /* Previous ciphertext or IV */ \
} pre##_cbcctx; \
\
/* --- @pre_cbcgetiv@ --- * \