Re: [PATCH] Re: Bignum performance

[Emanuel Berg]

Po Lu wrote:

>> Are we talking 1 word = 2 bytes = 16 bits here, s2c?
>>
>> If so, the range of fixnums are -32 768 to 32 767
>> inclusive, so those are hardly huge numbers.
>
> Under Arm64, general purpose integer registers are 64 bits
> wide. That is also the word size of said machine.

If they are, the range for fixnums is

(list (* -1 (expt 2 (1- 64)))
      (1-   (expt 2 (1- 64))) )

(-9223372036854775808 9223372036854775807)

Only after that it gets slower :P

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