mirror of
https://github.com/pezkuwichain/revive.git
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Cyrill Leutwiler
100 lines
2.6 KiB
Rust
100 lines
2.6 KiB
Rust
//! Translates the heap memory operations.
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use inkwell::values::BasicValue;
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use crate::polkavm::context::address_space::AddressSpace;
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use crate::polkavm::context::pointer::Pointer;
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use crate::polkavm::context::Context;
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use crate::polkavm::Dependency;
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/// Translates the `msize` instruction.
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pub fn msize<'ctx, D>(
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context: &mut Context<'ctx, D>,
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) -> anyhow::Result<inkwell::values::BasicValueEnum<'ctx>>
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where
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D: Dependency + Clone,
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{
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Ok(context
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.builder()
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.build_int_z_extend(
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context.build_msize()?,
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context.word_type(),
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"heap_size_extended",
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)?
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.as_basic_value_enum())
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}
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/// Translates the `mload` instruction.
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/// Uses the main heap.
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pub fn load<'ctx, D>(
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context: &mut Context<'ctx, D>,
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offset: inkwell::values::IntValue<'ctx>,
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assignment_pointer: &mut Option<inkwell::values::PointerValue<'ctx>>,
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) -> anyhow::Result<Option<inkwell::values::BasicValueEnum<'ctx>>>
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where
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D: Dependency + Clone,
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{
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let pointer = Pointer::new_with_offset(
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context,
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AddressSpace::Heap,
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context.word_type(),
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offset,
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"memory_load_pointer",
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);
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context.build_load_assign(pointer, "memory_load_result", assignment_pointer)
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}
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/// Translates the `mstore` instruction.
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/// Uses the main heap.
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pub fn store<'ctx, D>(
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context: &mut Context<'ctx, D>,
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offset: inkwell::values::IntValue<'ctx>,
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value: inkwell::values::IntValue<'ctx>,
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) -> anyhow::Result<()>
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where
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D: Dependency + Clone,
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{
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let pointer = Pointer::new_with_offset(
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context,
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AddressSpace::Heap,
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context.word_type(),
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offset,
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"memory_store_pointer",
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);
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context.build_store(pointer, value)?;
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Ok(())
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}
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/// Translates the `mstore8` instruction.
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/// Uses the main heap.
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pub fn store_byte<'ctx, D>(
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context: &mut Context<'ctx, D>,
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offset: inkwell::values::IntValue<'ctx>,
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value: inkwell::values::IntValue<'ctx>,
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) -> anyhow::Result<()>
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where
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D: Dependency + Clone,
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{
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let byte_type = context.byte_type();
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let value = context
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.builder()
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.build_int_truncate(value, byte_type, "mstore8_value")?;
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let pointer = Pointer::new_with_offset(
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context,
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AddressSpace::Heap,
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byte_type,
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offset,
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"mstore8_destination",
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);
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let pointer = context.build_sbrk(
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pointer.to_int(context),
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context.xlen_type().const_int(1, false),
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)?;
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context
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.builder()
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.build_store(pointer, value)?
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.set_alignment(revive_common::BYTE_LENGTH_BYTE as u32)
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.expect("Alignment is valid");
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Ok(())
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}
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