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20328e976f
- adds __cmpsi2, __cmpdi2, __cmpti2 - adds __ucmpsi2, __ucmpdi2, __ucmpti2 - use 2 if statements with 2 temporaries and a constant - tests: MIN, MIN+1, MIN/2, -1, 0, 1, MAX/2, MAX-1, MAX if applicable See #1290
50 lines
1.8 KiB
Zig
50 lines
1.8 KiB
Zig
const cmp = @import("cmp.zig");
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const testing = @import("std").testing;
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fn test__ucmpsi2(a: u32, b: u32, expected: i32) !void {
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var result = cmp.__ucmpsi2(a, b);
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try testing.expectEqual(expected, result);
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}
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test "ucmpsi2" {
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// minInt == 0
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// maxInt == 4294967295
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// minInt/2 == 0
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// maxInt/2 == 2147483647
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// 1. equality 0, 1 maxInt/2, maxInt-1, maxInt
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try test__ucmpsi2(0, 0, 1);
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try test__ucmpsi2(1, 1, 1);
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try test__ucmpsi2(2147483647, 2147483647, 1);
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try test__ucmpsi2(4294967294, 4294967294, 1);
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try test__ucmpsi2(4294967295, 4294967295, 1);
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// 2. cmp minInt, {0, 1, maxInt/2, maxInt-1, maxInt}
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try test__ucmpsi2(0, 1, 0);
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try test__ucmpsi2(0, 2147483647, 0);
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try test__ucmpsi2(0, 4294967294, 0);
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try test__ucmpsi2(0, 4294967295, 0);
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// 3. cmp minInt+1, {minInt, 0, maxInt/2, maxInt-1, maxInt}
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try test__ucmpsi2(1, 0, 2);
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try test__ucmpsi2(1, 2147483647, 0);
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try test__ucmpsi2(1, 4294967294, 0);
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try test__ucmpsi2(1, 4294967295, 0);
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// 4. cmp minInt/2==minInt, {}
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// 5. cmp -1 {}
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// 6. cmp 0==minInt,{}
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// 7. cmp 1==minInt+1, {}
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// 8. cmp maxInt/2, {0, maxInt-1, maxInt}
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try test__ucmpsi2(2147483647, 0, 2);
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try test__ucmpsi2(2147483647, 1, 2);
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try test__ucmpsi2(2147483647, 4294967294, 0);
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try test__ucmpsi2(2147483647, 4294967295, 0);
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// 9. cmp maxInt-1, {0,1,2, maxInt/2, maxInt}
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try test__ucmpsi2(4294967294, 0, 2);
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try test__ucmpsi2(4294967294, 1, 2);
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try test__ucmpsi2(4294967294, 2147483647, 2);
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try test__ucmpsi2(4294967294, 4294967295, 0);
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// 10.cmp maxInt, {0,1,2, maxInt/2, maxInt-1}
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try test__ucmpsi2(4294967295, 0, 2);
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try test__ucmpsi2(4294967295, 1, 2);
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try test__ucmpsi2(4294967295, 2147483647, 2);
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try test__ucmpsi2(4294967295, 4294967294, 2);
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}
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