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zig/test/behavior/math.zig
Luuk de Gram a0a587ff85 wasm: Enable passing behavior tests 
This shuffles some tests do ensure the new instructions are tested for the wasm backend,
by moving vectors into their own tests as well as move the f16 test cases as those require
special operating also.
2022-04-02 21:54:01 +02:00

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const builtin = @import("builtin");
const std = @import("std");
const expect = std.testing.expect;
const expectEqual = std.testing.expectEqual;
const expectEqualSlices = std.testing.expectEqualSlices;
const maxInt = std.math.maxInt;
const minInt = std.math.minInt;
const mem = std.mem;
test "assignment operators" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
var i: u32 = 0;
i += 5;
try expect(i == 5);
i -= 2;
try expect(i == 3);
i *= 20;
try expect(i == 60);
i /= 3;
try expect(i == 20);
i %= 11;
try expect(i == 9);
i <<= 1;
try expect(i == 18);
i >>= 2;
try expect(i == 4);
i = 6;
i &= 5;
try expect(i == 4);
i ^= 6;
try expect(i == 2);
i = 6;
i |= 3;
try expect(i == 7);
}
test "three expr in a row" {
try testThreeExprInARow(false, true);
comptime try testThreeExprInARow(false, true);
}
fn testThreeExprInARow(f: bool, t: bool) !void {
try assertFalse(f or f or f);
try assertFalse(t and t and f);
try assertFalse(1 | 2 | 4 != 7);
try assertFalse(3 ^ 6 ^ 8 != 13);
try assertFalse(7 & 14 & 28 != 4);
try assertFalse(9 << 1 << 2 != 9 << 3);
try assertFalse(90 >> 1 >> 2 != 90 >> 3);
try assertFalse(100 - 1 + 1000 != 1099);
try assertFalse(5 * 4 / 2 % 3 != 1);
try assertFalse(@as(i32, @as(i32, 5)) != 5);
try assertFalse(!!false);
try assertFalse(@as(i32, 7) != --(@as(i32, 7)));
}
fn assertFalse(b: bool) !void {
try expect(!b);
}
test "@clz" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try testClz();
comptime try testClz();
}
fn testClz() !void {
try expect(testOneClz(u8, 0b10001010) == 0);
try expect(testOneClz(u8, 0b00001010) == 4);
try expect(testOneClz(u8, 0b00011010) == 3);
try expect(testOneClz(u8, 0b00000000) == 8);
}
test "@clz big ints" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try testClzBigInts();
comptime try testClzBigInts();
}
fn testClzBigInts() !void {
try expect(testOneClz(u128, 0xffffffffffffffff) == 64);
try expect(testOneClz(u128, 0x10000000000000000) == 63);
}
fn testOneClz(comptime T: type, x: T) u32 {
return @clz(T, x);
}
test "@clz vectors" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
try testClzVectors();
comptime try testClzVectors();
}
fn testClzVectors() !void {
@setEvalBranchQuota(10_000);
try testOneClzVector(u8, 64, @splat(64, @as(u8, 0b10001010)), @splat(64, @as(u4, 0)));
try testOneClzVector(u8, 64, @splat(64, @as(u8, 0b00001010)), @splat(64, @as(u4, 4)));
try testOneClzVector(u8, 64, @splat(64, @as(u8, 0b00011010)), @splat(64, @as(u4, 3)));
try testOneClzVector(u8, 64, @splat(64, @as(u8, 0b00000000)), @splat(64, @as(u4, 8)));
try testOneClzVector(u128, 64, @splat(64, @as(u128, 0xffffffffffffffff)), @splat(64, @as(u8, 64)));
try testOneClzVector(u128, 64, @splat(64, @as(u128, 0x10000000000000000)), @splat(64, @as(u8, 63)));
}
fn testOneClzVector(
comptime T: type,
comptime len: u32,
x: @Vector(len, T),
expected: @Vector(len, u32),
) !void {
try expectVectorsEqual(@clz(T, x), expected);
}
fn expectVectorsEqual(a: anytype, b: anytype) !void {
const len_a = @typeInfo(@TypeOf(a)).Vector.len;
const len_b = @typeInfo(@TypeOf(b)).Vector.len;
try expect(len_a == len_b);
var i: usize = 0;
while (i < len_a) : (i += 1) {
try expect(a[i] == b[i]);
}
}
test "@ctz" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try testCtz();
comptime try testCtz();
}
fn testCtz() !void {
try expect(testOneCtz(u8, 0b10100000) == 5);
try expect(testOneCtz(u8, 0b10001010) == 1);
try expect(testOneCtz(u8, 0b00000000) == 8);
try expect(testOneCtz(u16, 0b00000000) == 16);
}
fn testOneCtz(comptime T: type, x: T) u32 {
return @ctz(T, x);
}
test "@ctz vectors" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_llvm and builtin.cpu.arch == .aarch64) {
// TODO this is tripping an LLVM assert:
// zig: /home/andy/Downloads/llvm-project-13/llvm/lib/CodeGen/GlobalISel/LegalizerInfo.cpp:198: llvm::LegalizeActionStep llvm::LegalizeRuleSet::apply(const llvm::LegalityQuery&) const: Assertion `mutationIsSane(Rule, Query, Mutation) && "legality mutation invalid for match"' failed.
// I need to report a zig issue and an llvm issue
return error.SkipZigTest;
}
try testCtzVectors();
comptime try testCtzVectors();
}
fn testCtzVectors() !void {
@setEvalBranchQuota(10_000);
try testOneCtzVector(u8, 64, @splat(64, @as(u8, 0b10100000)), @splat(64, @as(u4, 5)));
try testOneCtzVector(u8, 64, @splat(64, @as(u8, 0b10001010)), @splat(64, @as(u4, 1)));
try testOneCtzVector(u8, 64, @splat(64, @as(u8, 0b00000000)), @splat(64, @as(u4, 8)));
try testOneCtzVector(u16, 64, @splat(64, @as(u16, 0b00000000)), @splat(64, @as(u5, 16)));
}
fn testOneCtzVector(
comptime T: type,
comptime len: u32,
x: @Vector(len, T),
expected: @Vector(len, u32),
) !void {
try expectVectorsEqual(@ctz(T, x), expected);
}
test "const number literal" {
const one = 1;
const eleven = ten + one;
try expect(eleven == 11);
}
const ten = 10;
test "float equality" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
const x: f64 = 0.012;
const y: f64 = x + 1.0;
try testFloatEqualityImpl(x, y);
comptime try testFloatEqualityImpl(x, y);
}
fn testFloatEqualityImpl(x: f64, y: f64) !void {
const y2 = x + 1.0;
try expect(y == y2);
}
test "hex float literal parsing" {
comptime try expect(0x1.0 == 1.0);
}
test "hex float literal within range" {
const a = 0x1.0p16383;
const b = 0x0.1p16387;
const c = 0x1.0p-16382;
_ = a;
_ = b;
_ = c;
}
test "quad hex float literal parsing in range" {
const a = 0x1.af23456789bbaaab347645365cdep+5;
const b = 0x1.dedafcff354b6ae9758763545432p-9;
const c = 0x1.2f34dd5f437e849b4baab754cdefp+4534;
const d = 0x1.edcbff8ad76ab5bf46463233214fp-435;
_ = a;
_ = b;
_ = c;
_ = d;
}
test "underscore separator parsing" {
try expect(0_0_0_0 == 0);
try expect(1_234_567 == 1234567);
try expect(001_234_567 == 1234567);
try expect(0_0_1_2_3_4_5_6_7 == 1234567);
try expect(0b0_0_0_0 == 0);
try expect(0b1010_1010 == 0b10101010);
try expect(0b0000_1010_1010 == 0b10101010);
try expect(0b1_0_1_0_1_0_1_0 == 0b10101010);
try expect(0o0_0_0_0 == 0);
try expect(0o1010_1010 == 0o10101010);
try expect(0o0000_1010_1010 == 0o10101010);
try expect(0o1_0_1_0_1_0_1_0 == 0o10101010);
try expect(0x0_0_0_0 == 0);
try expect(0x1010_1010 == 0x10101010);
try expect(0x0000_1010_1010 == 0x10101010);
try expect(0x1_0_1_0_1_0_1_0 == 0x10101010);
try expect(123_456.789_000e1_0 == 123456.789000e10);
try expect(0_1_2_3_4_5_6.7_8_9_0_0_0e0_0_1_0 == 123456.789000e10);
try expect(0x1234_5678.9ABC_DEF0p-1_0 == 0x12345678.9ABCDEF0p-10);
try expect(0x1_2_3_4_5_6_7_8.9_A_B_C_D_E_F_0p-0_0_0_1_0 == 0x12345678.9ABCDEF0p-10);
}
test "comptime_int addition" {
comptime {
try expect(35361831660712422535336160538497375248 + 101752735581729509668353361206450473702 == 137114567242441932203689521744947848950);
try expect(594491908217841670578297176641415611445982232488944558774612 + 390603545391089362063884922208143568023166603618446395589768 == 985095453608931032642182098849559179469148836107390954364380);
}
}
test "comptime_int multiplication" {
comptime {
try expect(
45960427431263824329884196484953148229 * 128339149605334697009938835852565949723 == 5898522172026096622534201617172456926982464453350084962781392314016180490567,
);
try expect(
594491908217841670578297176641415611445982232488944558774612 * 390603545391089362063884922208143568023166603618446395589768 == 232210647056203049913662402532976186578842425262306016094292237500303028346593132411865381225871291702600263463125370016,
);
}
}
test "comptime_int shifting" {
comptime {
try expect((@as(u128, 1) << 127) == 0x80000000000000000000000000000000);
}
}
test "comptime_int multi-limb shift and mask" {
comptime {
var a = 0xefffffffa0000001eeeeeeefaaaaaaab;
try expect(@as(u32, a & 0xffffffff) == 0xaaaaaaab);
a >>= 32;
try expect(@as(u32, a & 0xffffffff) == 0xeeeeeeef);
a >>= 32;
try expect(@as(u32, a & 0xffffffff) == 0xa0000001);
a >>= 32;
try expect(@as(u32, a & 0xffffffff) == 0xefffffff);
a >>= 32;
try expect(a == 0);
}
}
test "comptime_int multi-limb partial shift right" {
comptime {
var a = 0x1ffffffffeeeeeeee;
a >>= 16;
try expect(a == 0x1ffffffffeeee);
}
}
test "xor" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
try test_xor();
comptime try test_xor();
}
fn test_xor() !void {
try testOneXor(0xFF, 0x00, 0xFF);
try testOneXor(0xF0, 0x0F, 0xFF);
try testOneXor(0xFF, 0xF0, 0x0F);
try testOneXor(0xFF, 0x0F, 0xF0);
try testOneXor(0xFF, 0xFF, 0x00);
}
fn testOneXor(a: u8, b: u8, c: u8) !void {
try expect(a ^ b == c);
}
test "comptime_int xor" {
comptime {
try expect(0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF ^ 0x00000000000000000000000000000000 == 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
try expect(0xFFFFFFFFFFFFFFFF0000000000000000 ^ 0x0000000000000000FFFFFFFFFFFFFFFF == 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
try expect(0xFFFFFFFFFFFFFFFF0000000000000000 ^ 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF == 0x0000000000000000FFFFFFFFFFFFFFFF);
try expect(0x0000000000000000FFFFFFFFFFFFFFFF ^ 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF == 0xFFFFFFFFFFFFFFFF0000000000000000);
try expect(0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF ^ 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF == 0x00000000000000000000000000000000);
try expect(0xFFFFFFFF00000000FFFFFFFF00000000 ^ 0x00000000FFFFFFFF00000000FFFFFFFF == 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF);
try expect(0xFFFFFFFF00000000FFFFFFFF00000000 ^ 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF == 0x00000000FFFFFFFF00000000FFFFFFFF);
try expect(0x00000000FFFFFFFF00000000FFFFFFFF ^ 0xFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFFF == 0xFFFFFFFF00000000FFFFFFFF00000000);
}
}
test "comptime_int param and return" {
const a = comptimeAdd(35361831660712422535336160538497375248, 101752735581729509668353361206450473702);
try expect(a == 137114567242441932203689521744947848950);
const b = comptimeAdd(594491908217841670578297176641415611445982232488944558774612, 390603545391089362063884922208143568023166603618446395589768);
try expect(b == 985095453608931032642182098849559179469148836107390954364380);
}
fn comptimeAdd(comptime a: comptime_int, comptime b: comptime_int) comptime_int {
return a + b;
}
test "binary not" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try expect(comptime x: {
break :x ~@as(u16, 0b1010101010101010) == 0b0101010101010101;
});
try expect(comptime x: {
break :x ~@as(u64, 2147483647) == 18446744071562067968;
});
try expect(comptime x: {
break :x ~@as(u0, 0) == 0;
});
try testBinaryNot(0b1010101010101010);
}
fn testBinaryNot(x: u16) !void {
try expect(~x == 0b0101010101010101);
}
test "division" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try testDivision();
comptime try testDivision();
}
fn testDivision() !void {
try expect(div(u32, 13, 3) == 4);
try expect(div(f32, 1.0, 2.0) == 0.5);
try expect(divExact(u32, 55, 11) == 5);
try expect(divExact(i32, -55, 11) == -5);
try expect(divExact(f32, 55.0, 11.0) == 5.0);
try expect(divExact(f32, -55.0, 11.0) == -5.0);
try expect(divFloor(i32, 5, 3) == 1);
try expect(divFloor(i32, -5, 3) == -2);
try expect(divFloor(f32, 5.0, 3.0) == 1.0);
try expect(divFloor(f32, -5.0, 3.0) == -2.0);
try expect(divFloor(i32, -0x80000000, -2) == 0x40000000);
try expect(divFloor(i32, 0, -0x80000000) == 0);
try expect(divFloor(i32, -0x40000001, 0x40000000) == -2);
try expect(divFloor(i32, -0x80000000, 1) == -0x80000000);
try expect(divFloor(i32, 10, 12) == 0);
try expect(divFloor(i32, -14, 12) == -2);
try expect(divFloor(i32, -2, 12) == -1);
try expect(divTrunc(i32, 5, 3) == 1);
try expect(divTrunc(i32, -5, 3) == -1);
try expect(divTrunc(i32, 9, -10) == 0);
try expect(divTrunc(i32, -9, 10) == 0);
try expect(divTrunc(f32, 5.0, 3.0) == 1.0);
try expect(divTrunc(f32, -5.0, 3.0) == -1.0);
try expect(divTrunc(f32, 9.0, -10.0) == 0.0);
try expect(divTrunc(f32, -9.0, 10.0) == 0.0);
try expect(divTrunc(f64, 5.0, 3.0) == 1.0);
try expect(divTrunc(f64, -5.0, 3.0) == -1.0);
try expect(divTrunc(f64, 9.0, -10.0) == 0.0);
try expect(divTrunc(f64, -9.0, 10.0) == 0.0);
try expect(divTrunc(i32, 10, 12) == 0);
try expect(divTrunc(i32, -14, 12) == -1);
try expect(divTrunc(i32, -2, 12) == 0);
try expect(mod(i32, 10, 12) == 10);
try expect(mod(i32, -14, 12) == 10);
try expect(mod(i32, -2, 12) == 10);
comptime {
try expect(
1194735857077236777412821811143690633098347576 % 508740759824825164163191790951174292733114988 == 177254337427586449086438229241342047632117600,
);
try expect(
@rem(-1194735857077236777412821811143690633098347576, 508740759824825164163191790951174292733114988) == -177254337427586449086438229241342047632117600,
);
try expect(
1194735857077236777412821811143690633098347576 / 508740759824825164163191790951174292733114988 == 2,
);
try expect(
@divTrunc(-1194735857077236777412821811143690633098347576, 508740759824825164163191790951174292733114988) == -2,
);
try expect(
@divTrunc(1194735857077236777412821811143690633098347576, -508740759824825164163191790951174292733114988) == -2,
);
try expect(
@divTrunc(-1194735857077236777412821811143690633098347576, -508740759824825164163191790951174292733114988) == 2,
);
try expect(
4126227191251978491697987544882340798050766755606969681711 % 10 == 1,
);
}
}
test "division half-precision floats" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try testDivisionFP16();
comptime try testDivisionFP16();
}
fn testDivisionFP16() !void {
try expect(div(f16, 1.0, 2.0) == 0.5);
try expect(divExact(f16, 55.0, 11.0) == 5.0);
try expect(divExact(f16, -55.0, 11.0) == -5.0);
try expect(divFloor(f16, 5.0, 3.0) == 1.0);
try expect(divFloor(f16, -5.0, 3.0) == -2.0);
try expect(divTrunc(f16, 5.0, 3.0) == 1.0);
try expect(divTrunc(f16, -5.0, 3.0) == -1.0);
try expect(divTrunc(f16, 9.0, -10.0) == 0.0);
try expect(divTrunc(f16, -9.0, 10.0) == 0.0);
}
fn div(comptime T: type, a: T, b: T) T {
return a / b;
}
fn divExact(comptime T: type, a: T, b: T) T {
return @divExact(a, b);
}
fn divFloor(comptime T: type, a: T, b: T) T {
return @divFloor(a, b);
}
fn divTrunc(comptime T: type, a: T, b: T) T {
return @divTrunc(a, b);
}
fn mod(comptime T: type, a: T, b: T) T {
return @mod(a, b);
}
test "unsigned wrapping" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testUnsignedWrappingEval(maxInt(u32));
comptime try testUnsignedWrappingEval(maxInt(u32));
}
fn testUnsignedWrappingEval(x: u32) !void {
const zero = x +% 1;
try expect(zero == 0);
const orig = zero -% 1;
try expect(orig == maxInt(u32));
}
test "signed wrapping" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testSignedWrappingEval(maxInt(i32));
comptime try testSignedWrappingEval(maxInt(i32));
}
fn testSignedWrappingEval(x: i32) !void {
const min_val = x +% 1;
try expect(min_val == minInt(i32));
const max_val = min_val -% 1;
try expect(max_val == maxInt(i32));
}
test "signed negation wrapping" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testSignedNegationWrappingEval(minInt(i16));
comptime try testSignedNegationWrappingEval(minInt(i16));
}
fn testSignedNegationWrappingEval(x: i16) !void {
try expect(x == -32768);
const neg = -%x;
try expect(neg == -32768);
}
test "unsigned negation wrapping" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testUnsignedNegationWrappingEval(1);
comptime try testUnsignedNegationWrappingEval(1);
}
fn testUnsignedNegationWrappingEval(x: u16) !void {
try expect(x == 1);
const neg = -%x;
try expect(neg == maxInt(u16));
}
test "unsigned 64-bit division" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try test_u64_div();
comptime try test_u64_div();
}
fn test_u64_div() !void {
const result = divWithResult(1152921504606846976, 34359738365);
try expect(result.quotient == 33554432);
try expect(result.remainder == 100663296);
}
fn divWithResult(a: u64, b: u64) DivResult {
return DivResult{
.quotient = a / b,
.remainder = a % b,
};
}
const DivResult = struct {
quotient: u64,
remainder: u64,
};
test "bit shift a u1" {
var x: u1 = 1;
var y = x << 0;
try expect(y == 1);
}
test "truncating shift right" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
try testShrTrunc(maxInt(u16));
comptime try testShrTrunc(maxInt(u16));
}
fn testShrTrunc(x: u16) !void {
const shifted = x >> 1;
try expect(shifted == 32767);
}
test "f128" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
try test_f128();
comptime try test_f128();
}
fn make_f128(x: f128) f128 {
return x;
}
fn test_f128() !void {
try expect(@sizeOf(f128) == 16);
try expect(make_f128(1.0) == 1.0);
try expect(make_f128(1.0) != 1.1);
try expect(make_f128(1.0) > 0.9);
try expect(make_f128(1.0) >= 0.9);
try expect(make_f128(1.0) >= 1.0);
try should_not_be_zero(1.0);
}
fn should_not_be_zero(x: f128) !void {
try expect(x != 0.0);
}
test "128-bit multiplication" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
var a: i128 = 3;
var b: i128 = 2;
var c = a * b;
try expect(c == 6);
}
test "@addWithOverflow" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
var result: u8 = undefined;
try expect(@addWithOverflow(u8, 250, 100, &result));
try expect(result == 94);
try expect(!@addWithOverflow(u8, 100, 150, &result));
try expect(result == 250);
var a: u8 = 200;
var b: u8 = 99;
try expect(@addWithOverflow(u8, a, b, &result));
try expect(result == 43);
b = 55;
try expect(!@addWithOverflow(u8, a, b, &result));
try expect(result == 255);
}
test "small int addition" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
var x: u2 = 0;
try expect(x == 0);
x += 1;
try expect(x == 1);
x += 1;
try expect(x == 2);
x += 1;
try expect(x == 3);
var result: @TypeOf(x) = 3;
try expect(@addWithOverflow(@TypeOf(x), x, 1, &result));
try expect(result == 0);
}
test "@mulWithOverflow" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
var result: u8 = undefined;
try expect(@mulWithOverflow(u8, 86, 3, &result));
try expect(result == 2);
try expect(!@mulWithOverflow(u8, 85, 3, &result));
try expect(result == 255);
var a: u8 = 123;
var b: u8 = 2;
try expect(!@mulWithOverflow(u8, a, b, &result));
try expect(result == 246);
b = 4;
try expect(@mulWithOverflow(u8, a, b, &result));
try expect(result == 236);
}
test "@subWithOverflow" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
var result: u8 = undefined;
try expect(@subWithOverflow(u8, 1, 2, &result));
try expect(result == 255);
try expect(!@subWithOverflow(u8, 1, 1, &result));
try expect(result == 0);
var a: u8 = 1;
var b: u8 = 2;
try expect(@subWithOverflow(u8, a, b, &result));
try expect(result == 255);
b = 1;
try expect(!@subWithOverflow(u8, a, b, &result));
try expect(result == 0);
}
test "@shlWithOverflow" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
var result: u16 = undefined;
try expect(@shlWithOverflow(u16, 0b0010111111111111, 3, &result));
try expect(result == 0b0111111111111000);
try expect(!@shlWithOverflow(u16, 0b0010111111111111, 2, &result));
try expect(result == 0b1011111111111100);
var a: u16 = 0b0000_0000_0000_0011;
var b: u4 = 15;
try expect(@shlWithOverflow(u16, a, b, &result));
try expect(result == 0b1000_0000_0000_0000);
b = 14;
try expect(!@shlWithOverflow(u16, a, b, &result));
try expect(result == 0b1100_0000_0000_0000);
}
test "overflow arithmetic with u0 values" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
var result: u0 = undefined;
try expect(!@addWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
try expect(!@subWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
try expect(!@mulWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
try expect(!@shlWithOverflow(u0, 0, 0, &result));
try expect(result == 0);
}
test "allow signed integer division/remainder when values are comptime known and positive or exact" {
if (builtin.zig_backend == .stage1) return error.SkipZigTest;
try expect(5 / 3 == 1);
try expect(-5 / -3 == 1);
try expect(-6 / 3 == -2);
try expect(5 % 3 == 2);
try expect(-6 % 3 == 0);
var undef: i32 = undefined;
if (0 % undef != 0) {
@compileError("0 as numerator should return comptime zero independent of denominator");
}
}
test "quad hex float literal parsing accurate" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
const a: f128 = 0x1.1111222233334444555566667777p+0;
// implied 1 is dropped, with an exponent of 0 (0x3fff) after biasing.
const expected: u128 = 0x3fff1111222233334444555566667777;
try expect(@bitCast(u128, a) == expected);
// non-normalized
const b: f128 = 0x11.111222233334444555566667777p-4;
try expect(@bitCast(u128, b) == expected);
const S = struct {
fn doTheTest() !void {
{
var f: f128 = 0x1.2eab345678439abcdefea56782346p+5;
try expect(@bitCast(u128, f) == 0x40042eab345678439abcdefea5678234);
}
{
var f: f128 = 0x1.edcb34a235253948765432134674fp-1;
try expect(@bitCast(u128, f) == 0x3ffeedcb34a235253948765432134674);
}
{
var f: f128 = 0x1.353e45674d89abacc3a2ebf3ff4ffp-50;
try expect(@bitCast(u128, f) == 0x3fcd353e45674d89abacc3a2ebf3ff50);
}
{
var f: f128 = 0x1.ed8764648369535adf4be3214567fp-9;
try expect(@bitCast(u128, f) == 0x3ff6ed8764648369535adf4be3214568);
}
const exp2ft = [_]f64{
0x1.6a09e667f3bcdp-1,
0x1.7a11473eb0187p-1,
0x1.8ace5422aa0dbp-1,
0x1.9c49182a3f090p-1,
0x1.ae89f995ad3adp-1,
0x1.c199bdd85529cp-1,
0x1.d5818dcfba487p-1,
0x1.ea4afa2a490dap-1,
0x1.0000000000000p+0,
0x1.0b5586cf9890fp+0,
0x1.172b83c7d517bp+0,
0x1.2387a6e756238p+0,
0x1.306fe0a31b715p+0,
0x1.3dea64c123422p+0,
0x1.4bfdad5362a27p+0,
0x1.5ab07dd485429p+0,
0x1.8p23,
0x1.62e430p-1,
0x1.ebfbe0p-3,
0x1.c6b348p-5,
0x1.3b2c9cp-7,
0x1.0p127,
-0x1.0p-149,
};
const answers = [_]u64{
0x3fe6a09e667f3bcd,
0x3fe7a11473eb0187,
0x3fe8ace5422aa0db,
0x3fe9c49182a3f090,
0x3feae89f995ad3ad,
0x3fec199bdd85529c,
0x3fed5818dcfba487,
0x3feea4afa2a490da,
0x3ff0000000000000,
0x3ff0b5586cf9890f,
0x3ff172b83c7d517b,
0x3ff2387a6e756238,
0x3ff306fe0a31b715,
0x3ff3dea64c123422,
0x3ff4bfdad5362a27,
0x3ff5ab07dd485429,
0x4168000000000000,
0x3fe62e4300000000,
0x3fcebfbe00000000,
0x3fac6b3480000000,
0x3f83b2c9c0000000,
0x47e0000000000000,
0xb6a0000000000000,
};
for (exp2ft) |x, i| {
try expect(@bitCast(u64, x) == answers[i]);
}
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "truncating shift left" {
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testShlTrunc(maxInt(u16));
comptime try testShlTrunc(maxInt(u16));
}
fn testShlTrunc(x: u16) !void {
const shifted = x << 1;
try expect(shifted == 65534);
}
test "exact shift left" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testShlExact(0b00110101);
comptime try testShlExact(0b00110101);
}
fn testShlExact(x: u8) !void {
const shifted = @shlExact(x, 2);
try expect(shifted == 0b11010100);
}
test "exact shift right" {
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
try testShrExact(0b10110100);
comptime try testShrExact(0b10110100);
}
fn testShrExact(x: u8) !void {
const shifted = @shrExact(x, 2);
try expect(shifted == 0b00101101);
}
test "shift left/right on u0 operand" {
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var x: u0 = 0;
var y: u0 = 0;
try expectEqual(@as(u0, 0), x << 0);
try expectEqual(@as(u0, 0), x >> 0);
try expectEqual(@as(u0, 0), x << y);
try expectEqual(@as(u0, 0), x >> y);
try expectEqual(@as(u0, 0), @shlExact(x, 0));
try expectEqual(@as(u0, 0), @shrExact(x, 0));
try expectEqual(@as(u0, 0), @shlExact(x, y));
try expectEqual(@as(u0, 0), @shrExact(x, y));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "comptime float rem int" {
comptime {
var x = @as(f32, 1) % 2;
try expect(x == 1.0);
}
}
test "remainder division" {
comptime try remdiv(f16);
comptime try remdiv(f32);
comptime try remdiv(f64);
comptime try remdiv(f128);
try remdiv(f16);
try remdiv(f64);
try remdiv(f128);
}
fn remdiv(comptime T: type) !void {
try expect(@as(T, 1) == @as(T, 1) % @as(T, 2));
try expect(@as(T, 1) == @as(T, 7) % @as(T, 3));
}
test "float remainder division using @rem" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
comptime try frem(f16);
comptime try frem(f32);
comptime try frem(f64);
comptime try frem(f128);
try frem(f16);
try frem(f32);
try frem(f64);
try frem(f128);
}
fn frem(comptime T: type) !void {
const epsilon = switch (T) {
f16 => 1.0,
f32 => 0.001,
f64 => 0.00001,
f128 => 0.0000001,
else => unreachable,
};
try expect(std.math.fabs(@rem(@as(T, 6.9), @as(T, 4.0)) - @as(T, 2.9)) < epsilon);
try expect(std.math.fabs(@rem(@as(T, -6.9), @as(T, 4.0)) - @as(T, -2.9)) < epsilon);
try expect(std.math.fabs(@rem(@as(T, -5.0), @as(T, 3.0)) - @as(T, -2.0)) < epsilon);
try expect(std.math.fabs(@rem(@as(T, 3.0), @as(T, 2.0)) - @as(T, 1.0)) < epsilon);
try expect(std.math.fabs(@rem(@as(T, 1.0), @as(T, 2.0)) - @as(T, 1.0)) < epsilon);
try expect(std.math.fabs(@rem(@as(T, 0.0), @as(T, 1.0)) - @as(T, 0.0)) < epsilon);
try expect(std.math.fabs(@rem(@as(T, -0.0), @as(T, 1.0)) - @as(T, -0.0)) < epsilon);
}
test "float modulo division using @mod" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
comptime try fmod(f16);
comptime try fmod(f32);
comptime try fmod(f64);
comptime try fmod(f128);
try fmod(f16);
try fmod(f32);
try fmod(f64);
try fmod(f128);
}
fn fmod(comptime T: type) !void {
const epsilon = switch (T) {
f16 => 1.0,
f32 => 0.001,
f64 => 0.00001,
f128 => 0.0000001,
else => unreachable,
};
try expect(std.math.fabs(@mod(@as(T, 6.9), @as(T, 4.0)) - @as(T, 2.9)) < epsilon);
try expect(std.math.fabs(@mod(@as(T, -6.9), @as(T, 4.0)) - @as(T, 1.1)) < epsilon);
try expect(std.math.fabs(@mod(@as(T, -5.0), @as(T, 3.0)) - @as(T, 1.0)) < epsilon);
try expect(std.math.fabs(@mod(@as(T, 3.0), @as(T, 2.0)) - @as(T, 1.0)) < epsilon);
try expect(std.math.fabs(@mod(@as(T, 1.0), @as(T, 2.0)) - @as(T, 1.0)) < epsilon);
try expect(std.math.fabs(@mod(@as(T, 0.0), @as(T, 1.0)) - @as(T, 0.0)) < epsilon);
try expect(std.math.fabs(@mod(@as(T, -0.0), @as(T, 1.0)) - @as(T, -0.0)) < epsilon);
}
test "@sqrt" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
try testSqrt(f64, 12.0);
comptime try testSqrt(f64, 12.0);
try testSqrt(f32, 13.0);
comptime try testSqrt(f32, 13.0);
try testSqrt(f16, 13.0);
comptime try testSqrt(f16, 13.0);
if (builtin.zig_backend == .stage1) {
const x = 14.0;
const y = x * x;
const z = @sqrt(y);
comptime try expect(z == x);
}
}
fn testSqrt(comptime T: type, x: T) !void {
try expect(@sqrt(x * x) == x);
}
test "@fabs" {
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
try testFabs(f128, 12.0);
comptime try testFabs(f128, 12.0);
try testFabs(f64, 12.0);
comptime try testFabs(f64, 12.0);
try testFabs(f32, 12.0);
comptime try testFabs(f32, 12.0);
try testFabs(f16, 12.0);
comptime try testFabs(f16, 12.0);
const x = 14.0;
const y = -x;
const z = @fabs(y);
comptime try expectEqual(x, z);
}
test "@fabs f80" {
if (true) {
// https://github.com/ziglang/zig/issues/11030
return error.SkipZigTest;
}
try testFabs(f80, 12.0);
comptime try testFabs(f80, 12.0);
}
fn testFabs(comptime T: type, x: T) !void {
const y = -x;
const z = @fabs(y);
try expect(x == z);
}
test "@floor" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
try testFloor(f64, 12.0);
comptime try testFloor(f64, 12.0);
try testFloor(f32, 12.0);
comptime try testFloor(f32, 12.0);
try testFloor(f16, 12.0);
comptime try testFloor(f16, 12.0);
const x = 14.0;
const y = x + 0.7;
const z = @floor(y);
comptime try expect(x == z);
}
test "@floor f80" {
if (true) {
// https://github.com/ziglang/zig/issues/11030
return error.SkipZigTest;
}
try testFloor(f80, 12.0);
comptime try testFloor(f80, 12.0);
}
test "@floor f128" {
if (builtin.zig_backend == .stage1) {
// Fails because it incorrectly lowers to a floorl function call.
return error.SkipZigTest;
}
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
testFloor(f128, 12.0);
comptime try testFloor(f128, 12.0);
}
fn testFloor(comptime T: type, x: T) !void {
const y = x + 0.6;
const z = @floor(y);
try expect(x == z);
}
test "@ceil" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
try testCeil(f64, 12.0);
comptime try testCeil(f64, 12.0);
try testCeil(f32, 12.0);
comptime try testCeil(f32, 12.0);
try testCeil(f16, 12.0);
comptime try testCeil(f16, 12.0);
const x = 14.0;
const y = x - 0.7;
const z = @ceil(y);
comptime try expect(x == z);
}
test "@ceil f80" {
if (true) {
// https://github.com/ziglang/zig/issues/11030
return error.SkipZigTest;
}
try testCeil(f80, 12.0);
comptime try testCeil(f80, 12.0);
}
test "@ceil f128" {
if (builtin.zig_backend == .stage1) {
// Fails because it incorrectly lowers to a ceill function call.
return error.SkipZigTest;
}
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
testCeil(f128, 12.0);
comptime try testCeil(f128, 12.0);
}
fn testCeil(comptime T: type, x: T) !void {
const y = x - 0.8;
const z = @ceil(y);
try expect(x == z);
}
test "@trunc" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
try testTrunc(f64, 12.0);
comptime try testTrunc(f64, 12.0);
try testTrunc(f32, 12.0);
comptime try testTrunc(f32, 12.0);
try testTrunc(f16, 12.0);
comptime try testTrunc(f16, 12.0);
const x = 14.0;
const y = x + 0.7;
const z = @trunc(y);
comptime try expect(x == z);
}
test "@trunc f80" {
if (true) {
// https://github.com/ziglang/zig/issues/11030
return error.SkipZigTest;
}
try testTrunc(f80, 12.0);
comptime try testTrunc(f80, 12.0);
comptime {
const x: f80 = 12.0;
const y = x + 0.8;
const z = @trunc(y);
try expect(x == z);
}
}
test "@trunc f128" {
if (builtin.zig_backend == .stage1) {
// Fails because it incorrectly lowers to a truncl function call.
return error.SkipZigTest;
}
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
testTrunc(f128, 12.0);
comptime try testTrunc(f128, 12.0);
}
fn testTrunc(comptime T: type, x: T) !void {
{
const y = x + 0.8;
const z = @trunc(y);
try expect(x == z);
}
{
const y = -x - 0.8;
const z = @trunc(y);
try expect(-x == z);
}
}
test "@round" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
try testRound(f64, 12.0);
comptime try testRound(f64, 12.0);
try testRound(f32, 12.0);
comptime try testRound(f32, 12.0);
try testRound(f16, 12.0);
comptime try testRound(f16, 12.0);
const x = 14.0;
const y = x + 0.4;
const z = @round(y);
comptime try expect(x == z);
}
test "@round f80" {
if (true) {
// https://github.com/ziglang/zig/issues/11030
return error.SkipZigTest;
}
try testRound(f80, 12.0);
comptime try testRound(f80, 12.0);
}
test "@round f128" {
if (builtin.zig_backend == .stage1) {
// Fails because it incorrectly lowers to a roundl function call.
return error.SkipZigTest;
}
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
testRound(f128, 12.0);
comptime try testRound(f128, 12.0);
}
fn testRound(comptime T: type, x: T) !void {
const y = x - 0.5;
const z = @round(y);
try expect(x == z);
}
test "vector integer addition" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var a: @Vector(4, i32) = [_]i32{ 1, 2, 3, 4 };
var b: @Vector(4, i32) = [_]i32{ 5, 6, 7, 8 };
var result = a + b;
var result_array: [4]i32 = result;
const expected = [_]i32{ 6, 8, 10, 12 };
try expectEqualSlices(i32, &expected, &result_array);
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "NaN comparison" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
try testNanEqNan(f16);
try testNanEqNan(f32);
try testNanEqNan(f64);
try testNanEqNan(f128);
comptime try testNanEqNan(f16);
comptime try testNanEqNan(f32);
comptime try testNanEqNan(f64);
comptime try testNanEqNan(f128);
}
test "NaN comparison f80" {
if (true) {
// https://github.com/ziglang/zig/issues/11030
return error.SkipZigTest;
}
try testNanEqNan(f80);
comptime try testNanEqNan(f80);
}
fn testNanEqNan(comptime F: type) !void {
var nan1 = std.math.nan(F);
var nan2 = std.math.nan(F);
try expect(nan1 != nan2);
try expect(!(nan1 == nan2));
try expect(!(nan1 > nan2));
try expect(!(nan1 >= nan2));
try expect(!(nan1 < nan2));
try expect(!(nan1 <= nan2));
}
test "vector comparison" {
if (builtin.zig_backend == .stage2_c) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_wasm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_arm) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_aarch64) return error.SkipZigTest; // TODO
if (builtin.zig_backend == .stage2_x86_64) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
var a: @Vector(6, i32) = [_]i32{ 1, 3, -1, 5, 7, 9 };
var b: @Vector(6, i32) = [_]i32{ -1, 3, 0, 6, 10, -10 };
try expect(mem.eql(bool, &@as([6]bool, a < b), &[_]bool{ false, false, true, true, true, false }));
try expect(mem.eql(bool, &@as([6]bool, a <= b), &[_]bool{ false, true, true, true, true, false }));
try expect(mem.eql(bool, &@as([6]bool, a == b), &[_]bool{ false, true, false, false, false, false }));
try expect(mem.eql(bool, &@as([6]bool, a != b), &[_]bool{ true, false, true, true, true, true }));
try expect(mem.eql(bool, &@as([6]bool, a > b), &[_]bool{ true, false, false, false, false, true }));
try expect(mem.eql(bool, &@as([6]bool, a >= b), &[_]bool{ true, true, false, false, false, true }));
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
test "compare undefined literal with comptime_int" {
var x = undefined == 1;
// x is now undefined with type bool
x = true;
try expect(x);
}
test "signed zeros are represented properly" {
if (builtin.zig_backend != .stage1) return error.SkipZigTest; // TODO
const S = struct {
fn doTheTest() !void {
inline for ([_]type{ f16, f32, f64, f128 }) |T| {
const ST = std.meta.Int(.unsigned, @typeInfo(T).Float.bits);
var as_fp_val = -@as(T, 0.0);
var as_uint_val = @bitCast(ST, as_fp_val);
// Ensure the sign bit is set.
try expect(as_uint_val >> (@typeInfo(T).Float.bits - 1) == 1);
}
}
};
try S.doTheTest();
comptime try S.doTheTest();
}
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