rename target to polkavm

Signed-off-by: xermicus <cyrill@parity.io>

crates/llvm-context/src/polkavm/evm/crypto.rs

@@ -0,0 +1,47 @@
+//! Translates the cryptographic operations.
+
+use crate::polkavm::context::Context;
+use crate::polkavm::Dependency;
+
+/// Translates the `sha3` instruction.
+pub fn sha3<'ctx, D>(
+    context: &mut Context<'ctx, D>,
+    offset: inkwell::values::IntValue<'ctx>,
+    length: inkwell::values::IntValue<'ctx>,
+) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
+where
+    D: Dependency + Clone,
+{
+    let offset_casted = context.safe_truncate_int_to_i32(offset)?;
+    let length_casted = context.safe_truncate_int_to_i32(length)?;
+    let input_pointer = context.build_heap_gep(offset_casted, length_casted)?;
+    let input_pointer_casted = context.builder().build_ptr_to_int(
+        input_pointer.value,
+        context.xlen_type(),
+        "input_pointer_casted",
+    )?;
+
+    let output_pointer = context.build_alloca(context.field_type(), "output_pointer");
+    let output_pointer_casted = context.builder().build_ptr_to_int(
+        output_pointer.value,
+        context.xlen_type(),
+        "output_pointer_casted",
+    )?;
+
+    let function = context
+        .module()
+        .get_function("hash_keccak_256")
+        .expect("is declared");
+
+    context.builder().build_call(
+        function,
+        &[
+            input_pointer_casted.into(),
+            length_casted.into(),
+            output_pointer_casted.into(),
+        ],
+        "call_seal_hash_keccak_256",
+    )?;
+
+    Ok(context.build_byte_swap(context.build_load(output_pointer, "sha3_output")?))
+}