634d11ab28
And add std.math.f128_* constants. The routines are: __fixdfdi, __fixdfsi, __fixdfti, __fixsfdi, __fixsfsi, __fixsfti, __fixtfdi, __fixtfsi, __fixtfti. These all call fixint which is a generic zig function that does the conversion: pub fn fixint(comptime fp_t: type, comptime fixint_t: type, a: fp_t) fixint_t There are also a set tests: __fixdfdi_test, __fixdfsi_test, __fixdfti_test, __fixsfdi_test, __fixsfsi_test, __fixsfti_test, __fixtfdi_test, __fixtfsi_test, __fixtfti_test.
67 lines
2.3 KiB
Zig
67 lines
2.3 KiB
Zig
const __fixdfdi = @import("fixdfdi.zig").__fixdfdi;
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const std = @import("std");
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const math = std.math;
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const assert = std.debug.assert;
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const warn = std.debug.warn;
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fn test__fixdfdi(a: f64, expected: i64) void {
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const x = __fixdfdi(a);
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//warn("a={}:{x} x={}:{x} expected={}:{x}:u64({x})\n", a, @bitCast(u64, a), x, x, expected, expected, @bitCast(u64, expected));
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assert(x == expected);
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}
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test "fixdfdi" {
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//warn("\n");
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test__fixdfdi(-math.f64_max, math.minInt(i64));
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test__fixdfdi(-0x1.FFFFFFFFFFFFFp+1023, math.minInt(i64));
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test__fixdfdi(-0x1.FFFFFFFFFFFFFp+1023, -0x8000000000000000);
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test__fixdfdi(-0x1.0000000000000p+127, -0x8000000000000000);
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test__fixdfdi(-0x1.FFFFFFFFFFFFFp+126, -0x8000000000000000);
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test__fixdfdi(-0x1.FFFFFFFFFFFFEp+126, -0x8000000000000000);
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test__fixdfdi(-0x1.0000000000001p+63, -0x8000000000000000);
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test__fixdfdi(-0x1.0000000000000p+63, -0x8000000000000000);
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test__fixdfdi(-0x1.FFFFFFFFFFFFFp+62, -0x7FFFFFFFFFFFFC00);
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test__fixdfdi(-0x1.FFFFFFFFFFFFEp+62, -0x7FFFFFFFFFFFF800);
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test__fixdfdi(-0x1.FFFFFEp+62, -0x7fffff8000000000);
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test__fixdfdi(-0x1.FFFFFCp+62, -0x7fffff0000000000);
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test__fixdfdi(-2.01, -2);
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test__fixdfdi(-2.0, -2);
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test__fixdfdi(-1.99, -1);
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test__fixdfdi(-1.0, -1);
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test__fixdfdi(-0.99, 0);
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test__fixdfdi(-0.5, 0);
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test__fixdfdi(-math.f64_min, 0);
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test__fixdfdi(0.0, 0);
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test__fixdfdi(math.f64_min, 0);
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test__fixdfdi(0.5, 0);
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test__fixdfdi(0.99, 0);
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test__fixdfdi(1.0, 1);
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test__fixdfdi(1.5, 1);
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test__fixdfdi(1.99, 1);
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test__fixdfdi(2.0, 2);
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test__fixdfdi(2.01, 2);
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test__fixdfdi(0x1.FFFFFCp+62, 0x7FFFFF0000000000);
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test__fixdfdi(0x1.FFFFFEp+62, 0x7FFFFF8000000000);
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test__fixdfdi(0x1.FFFFFFFFFFFFEp+62, 0x7FFFFFFFFFFFF800);
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test__fixdfdi(0x1.FFFFFFFFFFFFFp+62, 0x7FFFFFFFFFFFFC00);
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test__fixdfdi(0x1.0000000000000p+63, 0x7FFFFFFFFFFFFFFF);
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test__fixdfdi(0x1.0000000000001p+63, 0x7FFFFFFFFFFFFFFF);
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test__fixdfdi(0x1.FFFFFFFFFFFFEp+126, 0x7FFFFFFFFFFFFFFF);
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test__fixdfdi(0x1.FFFFFFFFFFFFFp+126, 0x7FFFFFFFFFFFFFFF);
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test__fixdfdi(0x1.0000000000000p+127, 0x7FFFFFFFFFFFFFFF);
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test__fixdfdi(0x1.FFFFFFFFFFFFFp+1023, 0x7FFFFFFFFFFFFFFF);
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test__fixdfdi(0x1.FFFFFFFFFFFFFp+1023, math.maxInt(i64));
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test__fixdfdi(math.f64_max, math.maxInt(i64));
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}
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