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https://github.com/ziglang/zig.git
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6b14c58f63
This improves readability as well as compatibility with stage2. Most of compiler-rt is now enabled for stage2 with just a few functions disabled (until stage2 passes more behavior tests).
36 lines
794 B
Zig
36 lines
794 B
Zig
const std = @import("std");
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const builtin = @import("builtin");
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// neg - negate (the number)
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// - negXi2 for unoptimized little and big endian
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// sfffffff = 2^31-1
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// two's complement inverting bits and add 1 would result in -INT_MIN == 0
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// => -INT_MIN = -2^31 forbidden
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// * size optimized builds
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// * machines that dont support carry operations
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inline fn negXi2(comptime T: type, a: T) T {
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@setRuntimeSafety(builtin.is_test);
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return -a;
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}
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pub fn __negsi2(a: i32) callconv(.C) i32 {
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return negXi2(i32, a);
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}
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pub fn __negdi2(a: i64) callconv(.C) i64 {
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return negXi2(i64, a);
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}
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pub fn __negti2(a: i128) callconv(.C) i128 {
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return negXi2(i128, a);
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}
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test {
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_ = @import("negsi2_test.zig");
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_ = @import("negdi2_test.zig");
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_ = @import("negti2_test.zig");
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}
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