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Vm bitops fixes (#10520)

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Arne Döring
2019-02-05 09:31:37 +01:00
committed by Andreas Rumpf
parent bcb5995ddf
commit 824f39b32e
5 changed files with 47 additions and 62 deletions
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67
tests/stdlib/tbitops.nim
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@@ -1,9 +1,9 @@
discard """
nimout: "OK"
output: "OK"
"""
import bitops
proc main() =
const U8 = 0b0011_0010'u8
const I8 = 0b0011_0010'i8
@@ -79,25 +79,6 @@ proc main() =
doAssert( U8.rotateLeftBits(3) == 0b10010001'u8)
doAssert( U8.rotateRightBits(3) == 0b0100_0110'u8)
static :
# test bitopts at compile time with vm
doAssert( U8.fastLog2 == 5)
doAssert( I8.fastLog2 == 5)
doAssert( U8.countLeadingZeroBits == 2)
doAssert( I8.countLeadingZeroBits == 2)
doAssert( U8.countTrailingZeroBits == 1)
doAssert( I8.countTrailingZeroBits == 1)
doAssert( U8.firstSetBit == 2)
doAssert( I8.firstSetBit == 2)
doAssert( U8.parityBits == 1)
doAssert( I8.parityBits == 1)
doAssert( U8.countSetBits == 3)
doAssert( I8.countSetBits == 3)
doAssert( U8.rotateLeftBits(3) == 0b10010001'u8)
doAssert( U8.rotateRightBits(3) == 0b0100_0110'u8)
template test_undefined_impl(ffunc: untyped; expected: int; is_static: bool) =
doAssert( ffunc(0'u8) == expected)
doAssert( ffunc(0'i8) == expected)
@@ -142,26 +123,6 @@ proc main() =
doAssert( U64A.rotateLeftBits(64) == U64A)
doAssert( U64A.rotateRightBits(64) == U64A)
static: # check for undefined behavior with rotate by zero.
doAssert( U8.rotateLeftBits(0) == U8)
doAssert( U8.rotateRightBits(0) == U8)
doAssert( U16.rotateLeftBits(0) == U16)
doAssert( U16.rotateRightBits(0) == U16)
doAssert( U32.rotateLeftBits(0) == U32)
doAssert( U32.rotateRightBits(0) == U32)
doAssert( U64A.rotateLeftBits(0) == U64A)
doAssert( U64A.rotateRightBits(0) == U64A)
# check for undefined behavior with rotate by integer width.
doAssert( U8.rotateLeftBits(8) == U8)
doAssert( U8.rotateRightBits(8) == U8)
doAssert( U16.rotateLeftBits(16) == U16)
doAssert( U16.rotateRightBits(16) == U16)
doAssert( U32.rotateLeftBits(32) == U32)
doAssert( U32.rotateRightBits(32) == U32)
doAssert( U64A.rotateLeftBits(64) == U64A)
doAssert( U64A.rotateRightBits(64) == U64A)
block:
# mask operations
var v: uint8
@@ -207,18 +168,22 @@ proc main() =
var v: uint64
v.setBit(63)
doAssert v == 0b1000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000_0000'u64
block:
# Test if RangeError is thrown if indexing out of range
try:
var v: uint32
var i = 32
v.setBit(i)
doAssert false
except RangeError:
discard
except:
doAssert false
echo "OK"
block: # not ready for vm because exception is compile error
try:
var v: uint32
var i = 32
v.setBit(i)
doAssert false
except RangeError:
discard
except:
doAssert false
main()
static:
# test everything on vm as well
main()