InfernoDeity
/
holey-bytes
forked from AbleOS/holey-bytes
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

ABI proposal part 1

master
ondra05 2023-09-08 10:46:41 +02:00
parent 0b9601e105
commit 35f3d59a54
No known key found for this signature in database
GPG Key ID: 0DA6D2BB2285E881
1 changed files with 29 additions and 0 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

29
c-abi.md Normal file
View File

@ -0,0 +1,29 @@
# C ABI (proposal)
## C datatypes
| C Type | Description | Size (B) |
|:------------|:-------------------------|-------------:|
| char | Character / byte | 8 |
| short | Short integer | 16 |
| int | Integer | 32 |
| long | Long integer | 64 |
| long long | Long long integer | 64 |
| T* | Pointer | 64 |
| float | Single-precision float | 32 |
| double | Double-precision float | 64 |
| long double | Extended-precision float | **Bikeshed** |
## Registers
| Register | ABI Name | Description | Saver |
|:---------|:---------|:---------------|:-------|
| `r0` | — | Zero register | N/A |
| `r1` | `ra` | Return address | Caller |
| `r2` | `sp` | Stack pointer | Callee |
| `r3` | `tp` | Thread pointer | N/A |
**TODO:** Parameters
**TODO:** Saved
**TODO:** Temp