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core/vm: optimize Memory.Set32 (#24847)

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* core/vm: remove unnecessary memset for Memory.Set32

* core/vm: optimize Memory.Set32
This commit is contained in:
Qian Bin 2022-05-11 17:00:29 +08:00 committed by GitHub
parent f5ff022dbc
commit e0a1fd5fdc
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1 changed files with 2 additions and 3 deletions
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5
core/vm/memory.go
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@ -53,10 +53,9 @@ func (m *Memory) Set32(offset uint64, val *uint256.Int) {
if offset+32 > uint64(len(m.store)) { if offset+32 > uint64(len(m.store)) {
panic("invalid memory: store empty") panic("invalid memory: store empty")
} }
// Zero the memory area
copy(m.store[offset:offset+32], []byte{0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0})
// Fill in relevant bits // Fill in relevant bits
val.WriteToSlice(m.store[offset:]) b32 := val.Bytes32()
copy(m.store[offset:], b32[:])
} }
// Resize resizes the memory to size // Resize resizes the memory to size