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add math.isNaN (#16179)

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* add math.isNaN
* isNaN now works with --passc:-ffast-math; tests
* Update lib/pure/math.nim

Co-authored-by: Andreas Rumpf <rumpf_a@web.de>
This commit is contained in:
Timothee Cour 2020-12-11 02:01:43 -08:00 • committed by GitHub
commit 0b73106ccf
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4 changed files with 50 additions and 5 deletions
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31
tests/stdlib/tmath.nim
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@ -12,8 +12,11 @@ discard """
[Suite] ^
'''
matrix:"; -d:nimTmathCase2 -d:danger --passc:-ffast-math"
"""
# xxx: fix bugs for js then add: targets:"c js"
import math, random, os
import unittest
import sets, tables
@ -37,12 +40,16 @@ suite "random int":
var rand: int
for i in 1..1000:
rand = rand(100..1000)
check rand < 1000
when defined(js): # xxx bug: otherwise fails
check rand <= 1000
else:
check rand < 1000
check rand >= 100
test " again gives new numbers":
var rand1 = rand(1000000)
os.sleep(200)
when not defined(js):
os.sleep(200)
var rand2 = rand(1000000)
check rand1 != rand2
@ -72,7 +79,8 @@ suite "random float":
test " again gives new numbers":
var rand1:float = rand(1000000.0)
os.sleep(200)
when not defined(js):
os.sleep(200)
var rand2:float = rand(1000000.0)
check rand1 != rand2
@ -151,6 +159,7 @@ block:
when not defined(js):
# Check for no side effect annotation
proc mySqrt(num: float): float {.noSideEffect.} =
# xxx unused
return sqrt(num)
# check gamma function
@ -194,7 +203,8 @@ block:
#special case
doAssert(classify(trunc(1e1000000)) == fcInf)
doAssert(classify(trunc(-1e1000000)) == fcNegInf)
doAssert(classify(trunc(0.0/0.0)) == fcNan)
when not defined(nimTmathCase2):
doAssert(classify(trunc(0.0/0.0)) == fcNan)
doAssert(classify(trunc(0.0)) == fcZero)
#trick the compiler to produce signed zero
@ -211,7 +221,8 @@ block:
doAssert(trunc(0.1'f32) == 0)
doAssert(classify(trunc(1e1000000'f32)) == fcInf)
doAssert(classify(trunc(-1e1000000'f32)) == fcNegInf)
doAssert(classify(trunc(f_nan.float32)) == fcNan)
when not defined(nimTmathCase2):
doAssert(classify(trunc(f_nan.float32)) == fcNan)
doAssert(classify(trunc(0.0'f32)) == fcZero)
block: # sgn() tests
@ -272,3 +283,13 @@ block:
doAssert log2(2.0'f32) == 1.0'f32
doAssert log2(1.0'f32) == 0.0'f32
doAssert classify(log2(0.0'f32)) == fcNegInf
template main =
# xxx wrap all under `main` so it also gets tested in vm.
block: # isNaN
doAssert NaN.isNaN
doAssert not Inf.isNaN
doAssert isNaN(Inf - Inf)
main()
static: main()