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On Wed, 26 Jul 2006, Michael Sperber wrote:
For sure, SRFI 77 doesn't have 32-bit or 64-bit integers *as types*. (And that would cause major pain with the way Scheme's arithmetic is generally set up.)
However, it does have the necessary operations to easily implement 32-bit or 64-bit unsigned or two's complement arithmetic in the form of `div+mod' and `div0+mod0' operations. As such, it also has bit operations on them.
Conceded. But the context of my comment was efficiency. How likely is it that implementations will compile the expression (exact-and (* x y) #xFFFFFFFF) to the single machine instruction available on many architectures?
Given that SRFI-74 already mentions ranges u32, s32, ..., operations such as exact-u32*, exact-s32-div, ..., would seem natural and could address the efficiency concern.
SRFI 77 doesn't have, but R6RS will have, support for "unboxed arrays" of numbers in the form of a variation on SRFI 74. I'm not sure they qualify as "uniform," but is the uniformity crucial to your application?
Oh, they would probably do the job. Andre