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compiler_rt: README stubs for arbitrary precision big integer library routines

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Document current status of exports and intended design being inspired by
Integer Operations.
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Jan Philipp Hafer 2023-02-09 23:30:12 +01:00 committed by Andrew Kelley
parent a1f7c8d860
commit 8674418454
1 changed files with 16 additions and 3 deletions
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@ -695,6 +695,22 @@ are additionally supported by Zig, but not part of C standard. Alphabetically so
| ✓ | truncq | f128 | ∅ | f128 | .. PPC |
| ✓ | truncl |long double| ∅ |long double| .. |
Arbitrary Precision Big Integer (BigInt) library routines
TODO brief description
| Done | Name | result| a | b | size| ret | Comment |
| ---- | ------- | ----- | ----- | ----- | --- | ----- |---------------------- |
| | | | | | | |**BigInt Bit Operation**|
| | | | | | | |**BigInt Comparison** |
| | | | | | | |**BigInt Arithmetic** |
|✓|__udivei4 |[*c]u32|[*c]u32|[*c]u32|usize|void | `a / b` |
|✓|__umodei4 |[*c]u32|[*c]u32|[*c]u32|usize|void | `a % b` |
|✗|__divei4 |[*c]u32|[*c]u32|[*c]u32|usize|void | `a / b` |
|✗|__modei4 |[*c]u32|[*c]u32|[*c]u32|usize|void | `a % b` |
| | | | | | | |**BigInt Arithmetic with Trapping Overflow**|
| | | | | | | |**BigInt Arithmetic which Return on Overflow**[^noptr_faster]|
Further content (conditionally) exported with C abi:
- aarch64 outline atomics
- arm routines (memory routines + memclr [setting to 0], divmod routines and stubs for unwind_cpp)
@ -706,6 +722,3 @@ Further content (conditionally) exported with C abi:
- objective-c __isPlatformVersionAtLeast check
- stack probe routines
- tls emulation
Future work:
- Arbitrary length integer library routines