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Add test for uint256_mul_div_mod possible overflow #1328

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merged 3 commits into from
Jul 14, 2023
Merged

Add test for uint256_mul_div_mod possible overflow #1328

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3cdf65f
Add test
pefontana Jul 12, 2023
4fb4b0b
Fix Makefile compare commands
pefontana Jul 12, 2023
74d9d7c
Fix memory holes
pefontana Jul 12, 2023
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12 changes: 6 additions & 6 deletions Makefile
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Original file line number Diff line number Diff line change
Expand Up @@ -205,22 +205,22 @@ compare_benchmarks: $(COMPILED_BENCHES)
cd bench && ./run_benchmarks.sh

compare_trace_memory: $(CAIRO_RS_TRACE) $(CAIRO_TRACE) $(CAIRO_RS_MEM) $(CAIRO_MEM)
cd src/tests; ./compare_vm_state.sh trace memory
cd vm/src/tests; ./compare_vm_state.sh trace memory

compare_trace: $(CAIRO_RS_TRACE) $(CAIRO_TRACE)
cd src/tests; ./compare_vm_state.sh trace
cd vm/src/tests; ./compare_vm_state.sh trace

compare_memory: $(CAIRO_RS_MEM) $(CAIRO_MEM)
cd src/tests; ./compare_vm_state.sh memory
cd vm/src/tests; ./compare_vm_state.sh memory

compare_trace_memory_proof: $(COMPILED_PROOF_TESTS) $(CAIRO_RS_TRACE_PROOF) $(CAIRO_TRACE_PROOF) $(CAIRO_RS_MEM_PROOF) $(CAIRO_MEM_PROOF)
cd src/tests; ./compare_vm_state.sh trace memory proof_mode
cd vm/src/tests; ./compare_vm_state.sh trace memory proof_mode

compare_trace_proof: $(CAIRO_RS_TRACE_PROOF) $(CAIRO_TRACE_PROOF)
cd src/tests; ./compare_vm_state.sh trace proof_mode
cd vm/src/tests; ./compare_vm_state.sh trace proof_mode

compare_memory_proof: $(CAIRO_RS_MEM_PROOF) $(CAIRO_MEM_PROOF)
cd src/tests; ./compare_vm_state.sh memory proof_mode
cd vm/src/tests; ./compare_vm_state.sh memory proof_mode

# Run with nightly enable the `doc_cfg` feature wich let us provide clear explaination about which parts of the code are behind a feature flag
docs:
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10 changes: 10 additions & 0 deletions cairo_programs/uint256.cairo
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Expand Up @@ -84,6 +84,16 @@ func main{range_check_ptr: felt}() {
assert b_quotient_high = Uint256(0, 0);
assert b_remainder = Uint256(170141183460469231731687303715884105854, 1);

let (c_quotient_low, c_quotient_high, c_remainder) = uint256_mul_div_mod(
Uint256(340281070833283907490476236129005105807, 340282366920938463463374607431768211455),
Uint256(2447157533618445569039502, 0),
Uint256(0, 1),
);

assert c_quotient_low = Uint256(340282366920938463454053728725133866491, 2447157533618445569039501);
assert c_quotient_high = Uint256(0, 0);
assert c_remainder = Uint256(326588112914912836985603897252688572242, 0);

let (mult_low_a, mult_high_a) = uint256_mul(Uint256(59, 2), Uint256(10, 0));
assert mult_low_a = Uint256(590, 20);
assert mult_high_a = Uint256(0, 0);
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