diff options
Diffstat (limited to 'examples/arm64')
| -rw-r--r-- | examples/arm64/exit.hdass | 14 | ||||
| -rw-r--r-- | examples/arm64/sum.hdass | 19 |
2 files changed, 33 insertions, 0 deletions
diff --git a/examples/arm64/exit.hdass b/examples/arm64/exit.hdass new file mode 100644 index 0000000..a86e5e2 --- /dev/null +++ b/examples/arm64/exit.hdass @@ -0,0 +1,14 @@ +[entry: main] +[enable: logical_registers] + +// Exits with status 42 on AArch64 Linux. Logical registers map r1 -> x0 and +// r9 -> x8, so the exit code goes in x0 and the syscall number in x8; `syscall` +// lowers to `svc #0`. +const SYS_EXIT = 93 + +proc main +{ + r1 = 42 // x0 = exit code + r9 = SYS_EXIT // x8 = syscall number + syscall +} diff --git a/examples/arm64/sum.hdass b/examples/arm64/sum.hdass new file mode 100644 index 0000000..85820c9 --- /dev/null +++ b/examples/arm64/sum.hdass @@ -0,0 +1,19 @@ +[entry: main] +[enable: logical_registers] + +// Sums 5 + 4 + 3 + 2 + 1 = 15 with a named countdown loop, returns it as the +// exit status. Shows three-operand arithmetic (r1 = r1 + r2 -> add x0, x0, x1). +const SYS_EXIT = 93 + +proc main +{ + r1 = 0 + r2 = 5 + while .countdown r2 > 0 + { + r1 = r1 + r2 + r2 = r2 - 1 + } + r9 = SYS_EXIT + syscall +} |
