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C backend: implement signed trunc

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This commit is contained in:
Emily Bellows
2021-10-29 21:04:54 -04:00
committed by Andrew Kelley
parent 1de6f9a267
commit 969bcb6a59
3 changed files with 14 additions and 4 deletions
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7
test/behavior/basic.zig
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@@ -27,8 +27,11 @@ test "truncate to non-power-of-two integers" {
try testTrunc(u32, u1, 0b10110, 0b0);
try testTrunc(u32, u2, 0b10101, 0b01);
try testTrunc(u32, u2, 0b10110, 0b10);
// TODO add test coverage for this!
// try testTrunc(i32, i3, -4, -4);
try testTrunc(i32, i5, -4, -4);
try testTrunc(i32, i5, 4, 4);
try testTrunc(i32, i5, -28, 4);
try testTrunc(i32, i5, 28, -4);
try testTrunc(i32, i5, std.math.maxInt(i32), -1);
}
fn testTrunc(comptime Big: type, comptime Little: type, big: Big, little: Little) !void {