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math: fix failing test on FreeBSD with gcc 12.2.0 (and -ffast-math) (#19278)

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Delyan Angelov 2023-09-06 07:30:46 +03:00 • committed by GitHub
parent 639f128c1b
commit 3e93a13ed8
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5 changed files with 68 additions and 21 deletions
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15
vlib/math/math.v
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@ -140,6 +140,7 @@ pub fn clamp(x f64, a f64, b f64) f64 {
// if n is not a number, its sign is nan too.
[inline]
pub fn sign(n f64) f64 {
// dump(n)
if is_nan(n) {
return nan()
}
@ -200,9 +201,21 @@ pub fn veryclose(a f64, b f64) bool {
// alike checks if a and b are equal
pub fn alike(a f64, b f64) bool {
// eprintln('>>> a: ${f64_bits(a):20} | b: ${f64_bits(b):20} | a==b: ${a == b} | a: ${a:10} | b: ${b:10}')
// compare a and b, ignoring their last 2 bits:
if f64_bits(a) & 0xFFFF_FFFF_FFFF_FFFC == f64_bits(b) & 0xFFFF_FFFF_FFFF_FFFC {
return true
}
if a == -0 && b == 0 {
return true
}
if a == 0 && b == -0 {
return true
}
if is_nan(a) && is_nan(b) {
return true
} else if a == b {
}
if a == b {
return signbit(a) == signbit(b)
}
return false