status-im
/
nim-eth
mirror of https://github.com/status-im/nim-eth.git
2
0
Fork 0
Code Issues Projects Releases Wiki Activity

avoid func call when merkleizing UintN arrays (#413) 

This gets rid of an unnecessary function call when merkleizing `UintN`
arrays on `littleEndian` architectures.
This commit is contained in:
Etan Kissling 2021-10-21 10:40:40 +02:00 committed by GitHub
parent 33f548186d
commit d34d3409da
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
1 changed files with 4 additions and 12 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

16
eth/ssz/merkleization.nim
View File

@ -443,13 +443,15 @@ func chunkedHashTreeRootForBasicTypes[T](merkleizer: var SszMerkleizerImpl,
arr: openArray[T]): Digest =
static:
doAssert T is BasicType
doAssert bytesPerChunk mod sizeof(T) == 0
if arr.len == 0:
return getFinalHash(merkleizer)
when T is byte:
when sizeof(T) == 1 or cpuEndian == littleEndian:
var
remainingBytes = arr.len
remainingBytes = when sizeof(T) == 1: arr.len
else: arr.len * sizeof(T)
pos = cast[ptr byte](unsafeAddr arr[0])
while remainingBytes >= bytesPerChunk:
@ -460,17 +462,7 @@ func chunkedHashTreeRootForBasicTypes[T](merkleizer: var SszMerkleizerImpl,
if remainingBytes > 0:
merkleizer.addChunk(makeOpenArray(pos, remainingBytes))
elif T is bool or cpuEndian == littleEndian:
let
baseAddr = cast[ptr byte](unsafeAddr arr[0])
len = arr.len * sizeof(T)
return chunkedHashTreeRootForBasicTypes(merkleizer, makeOpenArray(baseAddr, len))
else:
static:
doAssert T is UintN
doAssert bytesPerChunk mod sizeof(T) == 0
const valuesPerChunk = bytesPerChunk div sizeof(T)
var writtenValues = 0