41 lines
835 B
Zig
41 lines
835 B
Zig
pub fn main() void {
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printNumberHex(0x00000000);
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printNumberHex(0xaaaaaaaa);
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printNumberHex(0xdeadbeef);
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printNumberHex(0x31415926);
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}
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fn printNumberHex(x: u32) void {
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var i: u5 = 28;
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while (true) : (i -= 4) {
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const digit = (x >> i) & 0xf;
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asm volatile ("svc #0"
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:
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: [number] "{r7}" (4),
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[arg1] "{r0}" (1),
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[arg2] "{r1}" (@ptrToInt("0123456789abcdef") + digit),
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[arg3] "{r2}" (1),
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: "memory"
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);
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if (i == 0) break;
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}
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asm volatile ("svc #0"
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:
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: [number] "{r7}" (4),
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[arg1] "{r0}" (1),
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[arg2] "{r1}" (@ptrToInt("\n")),
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[arg3] "{r2}" (1),
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: "memory"
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);
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}
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// run
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// target=arm-linux
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//
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// 00000000
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// aaaaaaaa
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// deadbeef
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// 31415926
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//
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