mirror of
https://github.com/ziglang/zig.git
synced 2025-12-27 08:33:15 +00:00
722d4a11bb
Support for f128, comptime_float, and c_longdouble require improvements to compiler_rt and will implemented in a later PR. Some of the code in this commit could be made more generic, for instance `llvm.airSqrt` could probably be `llvm.airUnaryMath`, but let's cross that bridge when we get to it.
117 lines
3.2 KiB
Zig
117 lines
3.2 KiB
Zig
const std = @import("std");
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const expect = std.testing.expect;
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const math = std.math;
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const pi = std.math.pi;
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const e = std.math.e;
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const Vector = std.meta.Vector;
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const epsilon = 0.000001;
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test "floating point comparisons" {
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try testFloatComparisons();
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comptime try testFloatComparisons();
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}
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fn testFloatComparisons() !void {
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inline for ([_]type{ f16, f32, f64, f128 }) |ty| {
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// No decimal part
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{
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const x: ty = 1.0;
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try expect(x == 1);
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try expect(x != 0);
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try expect(x > 0);
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try expect(x < 2);
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try expect(x >= 1);
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try expect(x <= 1);
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}
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// Non-zero decimal part
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{
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const x: ty = 1.5;
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try expect(x != 1);
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try expect(x != 2);
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try expect(x > 1);
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try expect(x < 2);
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try expect(x >= 1);
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try expect(x <= 2);
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}
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}
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}
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test "different sized float comparisons" {
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try testDifferentSizedFloatComparisons();
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comptime try testDifferentSizedFloatComparisons();
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}
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fn testDifferentSizedFloatComparisons() !void {
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var a: f16 = 1;
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var b: f64 = 2;
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try expect(a < b);
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}
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// TODO This is waiting on library support for the Windows build (not sure why the other's don't need it)
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//test "@nearbyint" {
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// comptime testNearbyInt();
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// testNearbyInt();
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//}
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//fn testNearbyInt() void {
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// // TODO test f16, f128, and c_longdouble
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// // https://github.com/ziglang/zig/issues/4026
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// {
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// var a: f32 = 2.1;
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// try expect(@nearbyint(a) == 2);
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// }
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// {
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// var a: f64 = -3.75;
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// try expect(@nearbyint(a) == -4);
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// }
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//}
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test "negative f128 floatToInt at compile-time" {
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const a: f128 = -2;
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var b = @floatToInt(i64, a);
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try expect(@as(i64, -2) == b);
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}
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test "@sqrt" {
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comptime try testSqrt();
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try testSqrt();
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}
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fn testSqrt() !void {
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{
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var a: f16 = 4;
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try expect(@sqrt(a) == 2);
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}
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{
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var a: f32 = 9;
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try expect(@sqrt(a) == 3);
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var b: f32 = 1.1;
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try expect(math.approxEqAbs(f32, @sqrt(b), 1.0488088481701516, epsilon));
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}
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{
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var a: f64 = 25;
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try expect(@sqrt(a) == 5);
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}
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}
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test "more @sqrt f16 tests" {
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// TODO these are not all passing at comptime
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try expect(@sqrt(@as(f16, 0.0)) == 0.0);
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try expect(math.approxEqAbs(f16, @sqrt(@as(f16, 2.0)), 1.414214, epsilon));
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try expect(math.approxEqAbs(f16, @sqrt(@as(f16, 3.6)), 1.897367, epsilon));
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try expect(@sqrt(@as(f16, 4.0)) == 2.0);
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try expect(math.approxEqAbs(f16, @sqrt(@as(f16, 7.539840)), 2.745877, epsilon));
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try expect(math.approxEqAbs(f16, @sqrt(@as(f16, 19.230934)), 4.385309, epsilon));
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try expect(@sqrt(@as(f16, 64.0)) == 8.0);
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try expect(math.approxEqAbs(f16, @sqrt(@as(f16, 64.1)), 8.006248, epsilon));
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try expect(math.approxEqAbs(f16, @sqrt(@as(f16, 8942.230469)), 94.563370, epsilon));
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// special cases
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try expect(math.isPositiveInf(@sqrt(@as(f16, math.inf(f16)))));
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try expect(@sqrt(@as(f16, 0.0)) == 0.0);
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try expect(@sqrt(@as(f16, -0.0)) == -0.0);
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try expect(math.isNan(@sqrt(@as(f16, -1.0))));
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try expect(math.isNan(@sqrt(@as(f16, math.nan(f16)))));
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}
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