3 Commits

Author	SHA1	Message	Date
Stephen Heumann	506f9fa965	Implement strtoll and strtoull (aka strtoimax and strtoumax). ... This is a fairly straightforward adaptation of the strtol/strtoul code. The multiplication routine is modified to return the next 16 bits in X so that strtoull can detect overflows.	2021-02-06 14:37:42 -06:00
Stephen Heumann	d1d0358e4b	Add 64-bit division routines. ... The ~CDIV8 routine is the same as ~DIV8 in SysLib, except that it negates the remainder if the numerator is negative. This complies with the definition of the % operator in C, which gives negative (or 0) remainders if the numerator is negative, such that (a/b)*b + a%b equals a. The ~UDIV8 routine is an unsigned version, using the same core division loop but without the sign handling.	2021-02-05 12:42:22 -06:00
Stephen Heumann	2bb5361c24	Add a new file for 64-bit integer routines, initially with an unsigned multiply. ... This file will be expanded with more support routines as needed. The unsigned multiply routine uses the core multiplication loop from the 64-bit signed multiply routine in SysLib, with new entry/exit code for the unsigned version.	2021-02-04 23:58:54 -06:00