pub struct MachineMemory {
pub ultra_banks: bool,
pub rom_consts: bool,
pub lut_banks: bool,
}Expand description
Where a field machine keeps its memories.
The as-built machines put everything in block RAM, which is what runs out first on a full chip (a fixed-base machine used 72 BRAM36: banks M and A 16 each, bank I 16, base-point tables 22, program 2.5). The specialized layout moves the run-time-written banks to UltraRAM, which the design barely uses, and turns a constants-only bank I into LUT ROM.
Fields§
§ultra_banks: boolBanks M and A and the key tables in UltraRAM (ram_style = "ultra").
Bank I also goes to UltraRAM when the program has inputs and no
presets (UltraRAM cannot be preloaded).
rom_consts: boolBank I as LUT ROM (ram_style = "distributed") when the program
takes no per-context inputs, so the bank only holds constants. Also
puts the constant ROM C, and the scanner’s per-context memories of
programs with no T steps, in LUT RAM.
lut_banks: boolBanks M and A in LUT RAM (ram_style = "distributed") when
ultra_banks is off: the layout that turns spare LUTs into
machines once UltraRAM and block RAM are spent. Key tables stay in
UltraRAM.
Implementations§
Source§impl MachineMemory
impl MachineMemory
Sourcepub const AS_BUILT: MachineMemory
pub const AS_BUILT: MachineMemory
Every memory left to synthesis (block RAM), as mapped in Vivado on 2026-10-14.
Sourcepub const SPECIALIZED: MachineMemory
pub const SPECIALIZED: MachineMemory
UltraRAM banks and LUT-ROM constants (the default for FieldMachine::new).
Sourcepub const BRAM_BANKS: MachineMemory
pub const BRAM_BANKS: MachineMemory
The block-RAM fallback for a machine that UltraRAM cannot hold: banks M and A (and key tables) in block RAM, constants still in LUT ROM. What the planner places when a build runs out of UltraRAM.
Sourcepub const LUT_BANKS: MachineMemory
pub const LUT_BANKS: MachineMemory
The LUT-RAM fallback: banks M and A in LUT RAM, key tables in UltraRAM, constants in LUT ROM.
Trait Implementations§
Source§impl Clone for MachineMemory
impl Clone for MachineMemory
Source§fn clone(&self) -> MachineMemory
fn clone(&self) -> MachineMemory
Returns a duplicate of the value. Read more
1.0.0 · Source§fn clone_from(&mut self, source: &Self)
fn clone_from(&mut self, source: &Self)
Performs copy-assignment from
source. Read moreSource§impl Debug for MachineMemory
impl Debug for MachineMemory
Source§impl PartialEq for MachineMemory
impl PartialEq for MachineMemory
impl Copy for MachineMemory
impl Eq for MachineMemory
impl StructuralPartialEq for MachineMemory
Auto Trait Implementations§
impl Freeze for MachineMemory
impl RefUnwindSafe for MachineMemory
impl Send for MachineMemory
impl Sync for MachineMemory
impl Unpin for MachineMemory
impl UnsafeUnpin for MachineMemory
impl UnwindSafe for MachineMemory
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