Zig 0.17.0-dev (Split by item)

This is an example of documentation generated by ZigDoc, an alternative to Zig's built-in Auto Doc feature. See also examples in other modes/formats. The project being documented here (as the example) is the Zig library itself.

syscall4

powerpc64.syscall4

pub fn syscall4(
    number: SYS,
    arg1: syscall_arg_t,
    arg2: syscall_arg_t,
    arg3: syscall_arg_t,
    arg4: syscall_arg_t,
) u64

File

lib/std/os/linux/powerpc64.zig:92

Code

pub fn syscall4(
    number: SYS,
    arg1: syscall_arg_t,
    arg2: syscall_arg_t,
    arg3: syscall_arg_t,
    arg4: syscall_arg_t,
) u64 {
    // These registers are both inputs and clobbers.
    var r0_out: u64 = undefined;
    var r4_out: u64 = undefined;
    var r5_out: u64 = undefined;
    var r6_out: u64 = undefined;
    return asm volatile (
        \\ sc
        \\ bns+ 1f
        \\ neg 3, 3
        \\ 1:
        : [ret] "={r3}" (-> u64),
          [r0_out] "={r0}" (r0_out),
          [r4_out] "={r4}" (r4_out),
          [r5_out] "={r5}" (r5_out),
          [r6_out] "={r6}" (r6_out),
        : [number] "{r0}" (@backingInt(number)),
          [arg1] "{r3}" (arg1),
          [arg2] "{r4}" (arg2),
          [arg3] "{r5}" (arg3),
          [arg4] "{r6}" (arg4),
        : .{ .memory = true, .cr0 = true, .r7 = true, .r8 = true, .r9 = true, .r10 = true, .r11 = true, .r12 = true, .ctr = true, .xer = true });
}