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d29871977f
We already have a LICENSE file that covers the Zig Standard Library. We no longer need to remind everyone that the license is MIT in every single file. Previously this was introduced to clarify the situation for a fork of Zig that made Zig's LICENSE file harder to find, and replaced it with their own license that required annual payments to their company. However that fork now appears to be dead. So there is no need to reinforce the copyright notice in every single file.
85 lines
2.9 KiB
Zig
85 lines
2.9 KiB
Zig
// Ported from:
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//
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// https://github.com/llvm/llvm-project/blob/02d85149a05cb1f6dc49f0ba7a2ceca53718ae17/compiler-rt/test/builtins/Unit/addtf3_test.c
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// https://github.com/llvm/llvm-project/blob/02d85149a05cb1f6dc49f0ba7a2ceca53718ae17/compiler-rt/test/builtins/Unit/subtf3_test.c
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const qnan128 = @bitCast(f128, @as(u128, 0x7fff800000000000) << 64);
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const inf128 = @bitCast(f128, @as(u128, 0x7fff000000000000) << 64);
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const __addtf3 = @import("addXf3.zig").__addtf3;
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fn test__addtf3(a: f128, b: f128, expected_hi: u64, expected_lo: u64) !void {
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const x = __addtf3(a, b);
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const rep = @bitCast(u128, x);
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const hi = @intCast(u64, rep >> 64);
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const lo = @truncate(u64, rep);
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if (hi == expected_hi and lo == expected_lo) {
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return;
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}
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// test other possible NaN representation (signal NaN)
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else if (expected_hi == 0x7fff800000000000 and expected_lo == 0x0) {
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if ((hi & 0x7fff000000000000) == 0x7fff000000000000 and
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((hi & 0xffffffffffff) > 0 or lo > 0))
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{
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return;
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}
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}
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return error.TestFailed;
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}
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test "addtf3" {
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try test__addtf3(qnan128, 0x1.23456789abcdefp+5, 0x7fff800000000000, 0x0);
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// NaN + any = NaN
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try test__addtf3(@bitCast(f128, (@as(u128, 0x7fff000000000000) << 64) | @as(u128, 0x800030000000)), 0x1.23456789abcdefp+5, 0x7fff800000000000, 0x0);
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// inf + inf = inf
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try test__addtf3(inf128, inf128, 0x7fff000000000000, 0x0);
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// inf + any = inf
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try test__addtf3(inf128, 0x1.2335653452436234723489432abcdefp+5, 0x7fff000000000000, 0x0);
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// any + any
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try test__addtf3(0x1.23456734245345543849abcdefp+5, 0x1.edcba52449872455634654321fp-1, 0x40042afc95c8b579, 0x61e58dd6c51eb77c);
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}
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const __subtf3 = @import("addXf3.zig").__subtf3;
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fn test__subtf3(a: f128, b: f128, expected_hi: u64, expected_lo: u64) !void {
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const x = __subtf3(a, b);
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const rep = @bitCast(u128, x);
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const hi = @intCast(u64, rep >> 64);
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const lo = @truncate(u64, rep);
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if (hi == expected_hi and lo == expected_lo) {
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return;
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}
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// test other possible NaN representation (signal NaN)
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else if (expected_hi == 0x7fff800000000000 and expected_lo == 0x0) {
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if ((hi & 0x7fff000000000000) == 0x7fff000000000000 and
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((hi & 0xffffffffffff) > 0 or lo > 0))
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{
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return;
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}
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}
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return error.TestFailed;
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}
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test "subtf3" {
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// qNaN - any = qNaN
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try test__subtf3(qnan128, 0x1.23456789abcdefp+5, 0x7fff800000000000, 0x0);
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// NaN + any = NaN
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try test__subtf3(@bitCast(f128, (@as(u128, 0x7fff000000000000) << 64) | @as(u128, 0x800030000000)), 0x1.23456789abcdefp+5, 0x7fff800000000000, 0x0);
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// inf - any = inf
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try test__subtf3(inf128, 0x1.23456789abcdefp+5, 0x7fff000000000000, 0x0);
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// any + any
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try test__subtf3(0x1.234567829a3bcdef5678ade36734p+5, 0x1.ee9d7c52354a6936ab8d7654321fp-1, 0x40041b8af1915166, 0xa44a7bca780a166c);
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}
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