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chore(avm): Constrain pc_size_in_bits column and rename #12899

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Merged
jeanmon merged 1 commit into from
Mar 20, 2025
Merged

chore(avm): Constrain pc_size_in_bits column and rename #12899

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6 changes: 4 additions & 2 deletions barretenberg/cpp/pil/vm2/instr_fetching.pil
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Original file line number Diff line number Diff line change
@@ -1,5 +1,6 @@
include "bc_decomposition.pil";
include "range_check.pil";
include "constants_gen.pil";

namespace instr_fetching;

Expand Down Expand Up @@ -58,12 +59,13 @@ pc_abs_diff = sel * ((2 * pc_out_of_range - 1) * (pc - bytecode_size) - 1 + pc_o

// TODO: Remove this one once we support constant in lookup tuples
// A column with the value 32 at each row.
pol commit thirty_two;
pol commit pc_size_in_bits;
sel * (pc_size_in_bits - constants.AVM_PC_SIZE_IN_BITS) = 0;

// pc_abs_diff is 32-bit long (pc is uint32_t)
// Use constant AVM_PC_SIZE_IN_BITS once we support constants in lookup tuples.
#[PC_ABS_DIFF_POSITIVE]
sel { pc_abs_diff, thirty_two } in range_check.sel { range_check.value, range_check.rng_chk_bits };
sel { pc_abs_diff, pc_size_in_bits } in range_check.sel { range_check.value, range_check.rng_chk_bits };

// The size of the bytecode is bytes_remaining at pc == 0.
#[BYTECODE_SIZE_FROM_BC_DEC]
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