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https://github.com/logos-storage/plonky2.git
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645d45f227
* Column definitions for addition, range checks & lookups I implemented addition (unsigned for now) as an example of how the arithmetic unit can interact with the 16-bit range check unit. Range checks and lookups aren't implemented yet. * Missing constraints * Tweaks to get tests passing * Reorg registers into files * Minor
21 lines
839 B
Rust
21 lines
839 B
Rust
//! Core registers.
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/// A cycle counter. Starts at 0; increments by 1.
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pub(crate) const COL_CLOCK: usize = super::START_CORE;
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/// A column which contains the values `[0, ... 2^16 - 1]`, potentially with duplicates. Used for
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/// 16-bit range checks.
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///
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/// For ease of verification, we enforce that it must begin with 0 and end with `2^16 - 1`, and each
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/// delta must be either 0 or 1.
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pub(crate) const COL_RANGE_16: usize = COL_CLOCK + 1;
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/// Pointer to the current instruction.
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pub(crate) const COL_INSTRUCTION_PTR: usize = COL_RANGE_16 + 1;
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/// Pointer to the base of the current call's stack frame.
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pub(crate) const COL_FRAME_PTR: usize = COL_INSTRUCTION_PTR + 1;
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/// Pointer to the tip of the current call's stack frame.
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pub(crate) const COL_STACK_PTR: usize = COL_FRAME_PTR + 1;
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pub(super) const END: usize = COL_STACK_PTR + 1;
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