| .globl stackSave |
| .globl stackRestore |
| .globl stackAlloc |
| |
| .globaltype __stack_pointer, i32 |
| |
| stackSave: |
| .functype stackSave() -> (i32) |
| global.get __stack_pointer |
| end_function |
| |
| stackRestore: |
| .functype stackRestore(i32) -> () |
| local.get 0 |
| global.set __stack_pointer |
| end_function |
| |
| stackAlloc: |
| .functype stackAlloc(i32) -> (i32) |
| .local i32, i32 |
| global.get __stack_pointer |
| # Get arg 0 -> number of bytes to allocate |
| local.get 0 |
| # Stack grows down. Subtract arg0 from __stack_pointer |
| i32.sub |
| # Align result by anding with ~15 |
| i32.const 0xfffffff0 |
| i32.and |
| local.tee 1 |
| global.set __stack_pointer |
| local.get 1 |
| end_function |
