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core/vm: fix error in slt/sgt, found by vmtests. Added testcase

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This commit is contained in:
Martin Holst Swende 2018-02-09 12:08:42 +01:00
parent 788755760c
commit fb7c46e80e
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GPG key ID: 683B438C05A5DDF0
2 changed files with 7 additions and 2 deletions
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4
core/vm/instructions.go
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@ -206,7 +206,7 @@ func opSlt(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac
return nil, nil
}
// Both negative
if x.Cmp(y) > 0 {
if x.Cmp(y) < 0 {
y.SetUint64(1)
} else {
y.SetUint64(0)
@ -243,7 +243,7 @@ func opSgt(pc *uint64, evm *EVM, contract *Contract, memory *Memory, stack *Stac
return nil, nil
}
// Both negative (note: equality -> 0)
if x.Cmp(y) >= 0 {
if x.Cmp(y) <= 0 {
y.SetUint64(0)
} else {
y.SetUint64(1)

5
core/vm/instructions_test.go
View file

@ -161,6 +161,7 @@ func TestSAR(t *testing.T) {
func TestSGT(t *testing.T) {
tests := []twoOperandTest{
{"0000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000000"},
{"ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "ffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0000000000000000000000000000000000000000000000000000000000000000"},
{"7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0000000000000000000000000000000000000000000000000000000000000000"},
@ -171,6 +172,8 @@ func TestSGT(t *testing.T) {
{"8000000000000000000000000000000000000000000000000000000000000001", "8000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000000"},
{"8000000000000000000000000000000000000000000000000000000000000001", "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0000000000000000000000000000000000000000000000000000000000000001"},
{"7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "8000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000000"},
{"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb", "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd", "0000000000000000000000000000000000000000000000000000000000000001"},
{"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd", "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb", "0000000000000000000000000000000000000000000000000000000000000000"},
}
testTwoOperandOp(t, tests, opSgt)
}
@ -187,6 +190,8 @@ func TestSLT(t *testing.T) {
{"8000000000000000000000000000000000000000000000000000000000000001", "8000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000000"},
{"8000000000000000000000000000000000000000000000000000000000000001", "7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "0000000000000000000000000000000000000000000000000000000000000000"},
{"7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", "8000000000000000000000000000000000000000000000000000000000000001", "0000000000000000000000000000000000000000000000000000000000000001"},
{"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb", "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd", "0000000000000000000000000000000000000000000000000000000000000000"},
{"fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffd", "fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffb", "0000000000000000000000000000000000000000000000000000000000000001"},
}
testTwoOperandOp(t, tests, opSlt)
}