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387b0ac4f1
* Generalise NaN handling and make std.math.nan() give quiet NaNs * Address uses of std.math.qnan_* and std.math.nan_* consts * Comment out failing test due to issues with signalling NaN * Fix issue in c_builtins.zig where we need qnan_u32
36 lines
1.5 KiB
Zig
36 lines
1.5 KiB
Zig
const std = @import("std");
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const math = std.math;
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const mem = std.mem;
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const testing = std.testing;
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const qnan_u16: u16 = 0x7E00;
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const snan_u16: u16 = 0x7D00;
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const qnan_u32: u32 = 0x7FC00000;
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const snan_u32: u32 = 0x7FA00000;
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const qnan_u64: u64 = 0x7FF8000000000000;
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const snan_u64: u64 = 0x7FF4000000000000;
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const qnan_u128: u128 = 0x7FFF8000000000000000000000000000;
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const snan_u128: u128 = 0x7FFF4000000000000000000000000000;
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const qnan_f16: f16 = math.nan(f16);
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const snan_f16: f16 = math.snan(f16);
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const qnan_f32: f32 = math.nan(f32);
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const snan_f32: f32 = math.snan(f32);
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const qnan_f64: f64 = math.nan(f64);
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const snan_f64: f64 = math.snan(f64);
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const qnan_f128: f128 = math.nan(f128);
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const snan_f128: f128 = math.snan(f128);
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test "nan memory equality" {
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// signaled
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try testing.expect(mem.eql(u8, mem.asBytes(&snan_u16), mem.asBytes(&snan_f16)));
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try testing.expect(mem.eql(u8, mem.asBytes(&snan_u32), mem.asBytes(&snan_f32)));
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try testing.expect(mem.eql(u8, mem.asBytes(&snan_u64), mem.asBytes(&snan_f64)));
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try testing.expect(mem.eql(u8, mem.asBytes(&snan_u128), mem.asBytes(&snan_f128)));
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// quiet
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try testing.expect(mem.eql(u8, mem.asBytes(&qnan_u16), mem.asBytes(&qnan_f16)));
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try testing.expect(mem.eql(u8, mem.asBytes(&qnan_u32), mem.asBytes(&qnan_f32)));
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try testing.expect(mem.eql(u8, mem.asBytes(&qnan_u64), mem.asBytes(&qnan_f64)));
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try testing.expect(mem.eql(u8, mem.asBytes(&qnan_u128), mem.asBytes(&qnan_f128)));
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}
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