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crates/core/machine/src/syscall/precompiles/memcpy.rs

@@ -0,0 +1,62 @@
+
+pub fn memory_copy_32<F: PrimeField32>(
+    local_chip: &MemoryLocalChip,
+    src: *const Fr,
+    dst: *mut Fr
+) {
+
+    let event = MemoryLocalEvent {
+        addr: src as u32,
+        initial_mem_access: MemoryRecord {
+            shard: current_shard,
+            timestamp: current_clk,
+            value: unsafe { *src }
+        },
+        final_mem_access: MemoryRecord {
+            shard: current_shard, 
+            timestamp: current_clk + 1,
+            value: unsafe { *src }
+        }
+    };
+
+    local_chip.process_memory_event(event);
+}
+
+
+pub fn memory_copy_64<F: PrimeField32>(
+    local_chip: &MemoryLocalChip,
+    src: *const Fr,
+    dst: *mut Fr
+) {
+
+    let low_event = MemoryLocalEvent {
+        addr: src as u32,
+        initial_mem_access: MemoryRecord {
+            shard: current_shard,
+            timestamp: current_clk,
+            value: unsafe { *src }
+        },
+        final_mem_access: MemoryRecord {
+            shard: current_shard,
+            timestamp: current_clk + 1, 
+            value: unsafe { *src }
+        }
+    };
+
+    let high_event = MemoryLocalEvent {
+        addr: (src as u32) + 4,
+        initial_mem_access: MemoryRecord {
+            shard: current_shard,
+            timestamp: current_clk,
+            value: unsafe { *src.offset(1) }
+        },
+        final_mem_access: MemoryRecord {
+            shard: current_shard,
+            timestamp: current_clk + 1,
+            value: unsafe { *src.offset(1) }
+        }
+    };
+
+    local_chip.process_memory_event(low_event);
+    local_chip.process_memory_event(high_event); 
+}