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core/vm: add remaining tests from the EIP

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This commit is contained in:
Felix Lange 2025-07-07 10:59:20 +02:00
parent 891ae31ad2
commit 81546c64c7
1 changed files with 25 additions and 26 deletions
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51
core/vm/instructions_test.go
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@ -977,39 +977,38 @@ func TestOpCLZ(t *testing.T) {
evm := NewEVM(BlockContext{}, nil, params.TestChainConfig, Config{})
tests := []struct {
name string
inputHex string
want uint64 // expected CLZ result
}{
{"zero", "0x0", 256},
{"one", "0x1", 255},
{"all-ones (256 bits)", "0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 0},
{"low-40-bits", "0xffffffffff", 216}, // 40 bits, so 256-40 = 216
{"low-11-bits", "0x6ff", 245}, // 0x6ff = 0b11011111111 (11 bits), so 256-11 = 245
{"0x0", 256},
{"0x1", 255},
{"0x6ff", 245}, // 0x6ff = 0b11011111111 (11 bits), so 256-11 = 245
{"0xffffffffff", 216}, // 40 bits, so 256-40 = 216
{"0x4000000000000000000000000000000000000000000000000000000000000000", 1},
{"0x7fffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 1},
{"0x8000000000000000000000000000000000000000000000000000000000000000", 0},
{"0xffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff", 0},
}
for _, tc := range tests {
t.Run(tc.name, func(t *testing.T) {
// prepare a fresh stack and PC
stack := newstack()
pc := uint64(0)
// prepare a fresh stack and PC
stack := newstack()
pc := uint64(0)
// parse input
val := new(uint256.Int)
if err := val.SetFromHex(tc.inputHex); err != nil {
t.Fatal("invalid hex uint256:", tc.inputHex)
}
// parse input
val := new(uint256.Int)
if err := val.SetFromHex(tc.inputHex); err != nil {
t.Fatal("invalid hex uint256:", tc.inputHex)
}
stack.push(val)
opCLZ(&pc, evm.interpreter, &ScopeContext{Stack: stack})
stack.push(val)
opCLZ(&pc, evm.interpreter, &ScopeContext{Stack: stack})
if gotLen := stack.len(); gotLen != 1 {
t.Fatalf("stack length = %d; want 1", gotLen)
}
result := stack.pop()
if got := result.Uint64(); got != tc.want {
t.Fatalf("clz(%q) = %d; want %d", tc.inputHex, got, tc.want)
}
})
if gotLen := stack.len(); gotLen != 1 {
t.Fatalf("stack length = %d; want 1", gotLen)
}
result := stack.pop()
if got := result.Uint64(); got != tc.want {
t.Fatalf("clz(%q) = %d; want %d", tc.inputHex, got, tc.want)
}
}
}