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Add Math.signbit (#333)

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This commit is contained in:
Max Graey
2018-11-18 12:46:48 +02:00
committed by Daniel Wirtz
parent 1928404f3b
commit 4944280cdc
7 changed files with 14830 additions and 14334 deletions
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13772
tests/compiler/std/math.optimized.wat
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44
tests/compiler/std/math.ts
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@ -33,15 +33,11 @@
const js = true; // also test, and thus compare to, JS math?
// these flags are unused, but kept in case these might just so happen to become useful
const INEXACT = 1 << 0;
const INVALID = 1 << 1;
const INEXACT = 1 << 0;
const INVALID = 1 << 1;
const DIVBYZERO = 1 << 2;
const UNDERFLOW = 1 << 3;
const OVERFLOW = 1 << 4;
function signbit(d: f64): i32 {
return <i32>(reinterpret<u64>(d) >> 63);
}
const OVERFLOW = 1 << 4;
function eulp(x: f64): i32 {
var u = reinterpret<u64>(x);
@ -54,7 +50,7 @@ function ulperr(got: f64, want: f64, dwant: f64): f64 {
const Ox1p1023 = reinterpret<f64>(0x7FE0000000000000);
if (isNaN(got) && isNaN(want)) return 0;
if (got == want) {
if (signbit(got) == signbit(want)) return dwant;
if (NativeMath.signbit(got) == NativeMath.signbit(want)) return dwant;
return Infinity;
}
if (!isFinite(got)) {
@ -64,10 +60,6 @@ function ulperr(got: f64, want: f64, dwant: f64): f64 {
return NativeMath.scalbn(got - want, -eulp(want)) + dwant;
}
function signbitf(f: f32): i32 {
return <i32>(reinterpret<u32>(f) >> 31);
}
function eulpf(x: f32): i32 {
var u = reinterpret<u32>(x);
var e = <i32>(u >> 23 & 0xff);
@ -79,7 +71,7 @@ function ulperrf(got: f32, want: f32, dwant: f32): f32 {
const Ox1p127f = reinterpret<f32>(0x7F000000);
if (isNaN(got) && isNaN(want)) return 0;
if (got == want) {
if (signbitf(got) == signbitf(want)) return dwant;
if (NativeMathf.signbit(got) == NativeMathf.signbit(want)) return dwant;
return Infinity;
}
if (!isFinite(got)) {
@ -2651,6 +2643,32 @@ assert(test_signf(Infinity, 1.0, 0.0, 0));
assert(test_signf(-Infinity, -1.0, 0.0, 0));
assert(test_signf(NaN, NaN, 0.0, 0));
////////////////////////////////////////////////////////////////////////////////////////////////////
// Math.signbit
////////////////////////////////////////////////////////////////////////////////////////////////////
assert(NativeMath.signbit(0.0) == false);
assert(NativeMath.signbit(-0.0) == true);
assert(NativeMath.signbit(1.0) == false);
assert(NativeMath.signbit(-1.0) == true);
assert(NativeMath.signbit(+NaN) == false);
assert(NativeMath.signbit(-NaN) == false);
assert(NativeMath.signbit(+Infinity) == false);
assert(NativeMath.signbit(-Infinity) == true);
////////////////////////////////////////////////////////////////////////////////////////////////////
// Mathf.signbit
////////////////////////////////////////////////////////////////////////////////////////////////////
assert(NativeMathf.signbit(0.0) == false);
assert(NativeMathf.signbit(-0.0) == true);
assert(NativeMathf.signbit(1.0) == false);
assert(NativeMathf.signbit(-1.0) == true);
assert(NativeMathf.signbit(+NaN) == false);
assert(NativeMathf.signbit(-NaN) == false);
assert(NativeMathf.signbit(+Infinity) == false);
assert(NativeMathf.signbit(-Infinity) == true);
////////////////////////////////////////////////////////////////////////////////////////////////////
// Math.rem
////////////////////////////////////////////////////////////////////////////////////////////////////

15325
tests/compiler/std/math.untouched.wat
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