mirror of
https://github.com/ziglang/zig.git
synced 2026-01-23 07:45:24 +00:00
f26dda2117
Most of this migration was performed automatically with `zig fmt`. There were a few exceptions which I had to manually fix: * `@alignCast` and `@addrSpaceCast` cannot be automatically rewritten * `@truncate`'s fixup is incorrect for vectors * Test cases are not formatted, and their error locations change
678 lines
22 KiB
Zig
678 lines
22 KiB
Zig
//! Machine Intermediate Representation.
|
|
//! This representation is produced by wasm Codegen.
|
|
//! Each of these instructions have a 1:1 mapping to a wasm opcode,
|
|
//! but may contain metadata for a specific opcode such as an immediate.
|
|
//! MIR can be lowered to both textual code (wat) and binary format (wasm).
|
|
//! The main benefits of MIR is optimization passes, pre-allocated locals,
|
|
//! and known jump labels for blocks.
|
|
|
|
const Mir = @This();
|
|
|
|
const std = @import("std");
|
|
|
|
/// A struct of array that represents each individual wasm
|
|
instructions: std.MultiArrayList(Inst).Slice,
|
|
/// A slice of indexes where the meaning of the data is determined by the
|
|
/// `Inst.Tag` value.
|
|
extra: []const u32,
|
|
|
|
pub const Inst = struct {
|
|
/// The opcode that represents this instruction
|
|
tag: Tag,
|
|
/// Data is determined by the set `tag`.
|
|
/// For example, `data` will be an i32 for when `tag` is 'i32_const'.
|
|
data: Data,
|
|
|
|
/// The position of a given MIR isntruction with the instruction list.
|
|
pub const Index = u32;
|
|
|
|
/// Contains all possible wasm opcodes the Zig compiler may emit
|
|
/// Rather than re-using std.wasm.Opcode, we only declare the opcodes
|
|
/// we need, and also use this possibility to document how to access
|
|
/// their payload.
|
|
///
|
|
/// Note: Uses its actual opcode value representation to easily convert
|
|
/// to and from its binary representation.
|
|
pub const Tag = enum(u8) {
|
|
/// Uses `nop`
|
|
@"unreachable" = 0x00,
|
|
/// Creates a new block that can be jump from.
|
|
///
|
|
/// Type of the block is given in data `block_type`
|
|
block = 0x02,
|
|
/// Creates a new loop.
|
|
///
|
|
/// Type of the loop is given in data `block_type`
|
|
loop = 0x03,
|
|
/// Inserts debug information about the current line and column
|
|
/// of the source code
|
|
///
|
|
/// Uses `payload` of which the payload type is `DbgLineColumn`
|
|
dbg_line = 0x06,
|
|
/// Emits epilogue begin debug information
|
|
///
|
|
/// Uses `nop`
|
|
dbg_epilogue_begin = 0x07,
|
|
/// Emits prologue end debug information
|
|
///
|
|
/// Uses `nop`
|
|
dbg_prologue_end = 0x08,
|
|
/// Represents the end of a function body or an initialization expression
|
|
///
|
|
/// Payload is `nop`
|
|
end = 0x0B,
|
|
/// Breaks from the current block to a label
|
|
///
|
|
/// Data is `label` where index represents the label to jump to
|
|
br = 0x0C,
|
|
/// Breaks from the current block if the stack value is non-zero
|
|
///
|
|
/// Data is `label` where index represents the label to jump to
|
|
br_if = 0x0D,
|
|
/// Jump table that takes the stack value as an index where each value
|
|
/// represents the label to jump to.
|
|
///
|
|
/// Data is extra of which the Payload's type is `JumpTable`
|
|
br_table = 0x0E,
|
|
/// Returns from the function
|
|
///
|
|
/// Uses `nop`
|
|
@"return" = 0x0F,
|
|
/// Calls a function by its index
|
|
///
|
|
/// Uses `label`
|
|
call = 0x10,
|
|
/// Calls a function pointer by its function signature
|
|
/// and index into the function table.
|
|
///
|
|
/// Uses `label`
|
|
call_indirect = 0x11,
|
|
/// Contains a symbol to a function pointer
|
|
/// uses `label`
|
|
///
|
|
/// Note: This uses `0x16` as value which is reserved by the WebAssembly
|
|
/// specification but unused, meaning we must update this if the specification were to
|
|
/// use this value.
|
|
function_index = 0x16,
|
|
/// Pops three values from the stack and pushes
|
|
/// the first or second value dependent on the third value.
|
|
/// Uses `tag`
|
|
select = 0x1B,
|
|
/// Loads a local at given index onto the stack.
|
|
///
|
|
/// Uses `label`
|
|
local_get = 0x20,
|
|
/// Pops a value from the stack into the local at given index.
|
|
/// Stack value must be of the same type as the local.
|
|
///
|
|
/// Uses `label`
|
|
local_set = 0x21,
|
|
/// Sets a local at given index using the value at the top of the stack without popping the value.
|
|
/// Stack value must have the same type as the local.
|
|
///
|
|
/// Uses `label`
|
|
local_tee = 0x22,
|
|
/// Loads a (mutable) global at given index onto the stack
|
|
///
|
|
/// Uses `label`
|
|
global_get = 0x23,
|
|
/// Pops a value from the stack and sets the global at given index.
|
|
/// Note: Both types must be equal and global must be marked mutable.
|
|
///
|
|
/// Uses `label`.
|
|
global_set = 0x24,
|
|
/// Loads a 32-bit integer from memory (data section) onto the stack
|
|
/// Pops the value from the stack which represents the offset into memory.
|
|
///
|
|
/// Uses `payload` of type `MemArg`.
|
|
i32_load = 0x28,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load = 0x29,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
f32_load = 0x2A,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
f64_load = 0x2B,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i32_load8_s = 0x2C,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i32_load8_u = 0x2D,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i32_load16_s = 0x2E,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i32_load16_u = 0x2F,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load8_s = 0x30,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load8_u = 0x31,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load16_s = 0x32,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load16_u = 0x33,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load32_s = 0x34,
|
|
/// Loads a value from memory onto the stack, based on the signedness
|
|
/// and bitsize of the type.
|
|
///
|
|
/// Uses `payload` with type `MemArg`
|
|
i64_load32_u = 0x35,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `payload` of type `MemArg`.
|
|
i32_store = 0x36,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
i64_store = 0x37,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
f32_store = 0x38,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
f64_store = 0x39,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
i32_store8 = 0x3A,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
i32_store16 = 0x3B,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
i64_store8 = 0x3C,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
i64_store16 = 0x3D,
|
|
/// Pops 2 values from the stack, where the first value represents the value to write into memory
|
|
/// and the second value represents the offset into memory where the value must be written to.
|
|
/// This opcode is typed and expects the stack value's type to be equal to this opcode's type.
|
|
///
|
|
/// Uses `Payload` with type `MemArg`
|
|
i64_store32 = 0x3E,
|
|
/// Returns the memory size in amount of pages.
|
|
///
|
|
/// Uses `label`
|
|
memory_size = 0x3F,
|
|
/// Increases the memory by given number of pages.
|
|
///
|
|
/// Uses `label`
|
|
memory_grow = 0x40,
|
|
/// Loads a 32-bit signed immediate value onto the stack
|
|
///
|
|
/// Uses `imm32`
|
|
i32_const = 0x41,
|
|
/// Loads a i64-bit signed immediate value onto the stack
|
|
///
|
|
/// uses `payload` of type `Imm64`
|
|
i64_const = 0x42,
|
|
/// Loads a 32-bit float value onto the stack.
|
|
///
|
|
/// Uses `float32`
|
|
f32_const = 0x43,
|
|
/// Loads a 64-bit float value onto the stack.
|
|
///
|
|
/// Uses `payload` of type `Float64`
|
|
f64_const = 0x44,
|
|
/// Uses `tag`
|
|
i32_eqz = 0x45,
|
|
/// Uses `tag`
|
|
i32_eq = 0x46,
|
|
/// Uses `tag`
|
|
i32_ne = 0x47,
|
|
/// Uses `tag`
|
|
i32_lt_s = 0x48,
|
|
/// Uses `tag`
|
|
i32_lt_u = 0x49,
|
|
/// Uses `tag`
|
|
i32_gt_s = 0x4A,
|
|
/// Uses `tag`
|
|
i32_gt_u = 0x4B,
|
|
/// Uses `tag`
|
|
i32_le_s = 0x4C,
|
|
/// Uses `tag`
|
|
i32_le_u = 0x4D,
|
|
/// Uses `tag`
|
|
i32_ge_s = 0x4E,
|
|
/// Uses `tag`
|
|
i32_ge_u = 0x4F,
|
|
/// Uses `tag`
|
|
i64_eqz = 0x50,
|
|
/// Uses `tag`
|
|
i64_eq = 0x51,
|
|
/// Uses `tag`
|
|
i64_ne = 0x52,
|
|
/// Uses `tag`
|
|
i64_lt_s = 0x53,
|
|
/// Uses `tag`
|
|
i64_lt_u = 0x54,
|
|
/// Uses `tag`
|
|
i64_gt_s = 0x55,
|
|
/// Uses `tag`
|
|
i64_gt_u = 0x56,
|
|
/// Uses `tag`
|
|
i64_le_s = 0x57,
|
|
/// Uses `tag`
|
|
i64_le_u = 0x58,
|
|
/// Uses `tag`
|
|
i64_ge_s = 0x59,
|
|
/// Uses `tag`
|
|
i64_ge_u = 0x5A,
|
|
/// Uses `tag`
|
|
f32_eq = 0x5B,
|
|
/// Uses `tag`
|
|
f32_ne = 0x5C,
|
|
/// Uses `tag`
|
|
f32_lt = 0x5D,
|
|
/// Uses `tag`
|
|
f32_gt = 0x5E,
|
|
/// Uses `tag`
|
|
f32_le = 0x5F,
|
|
/// Uses `tag`
|
|
f32_ge = 0x60,
|
|
/// Uses `tag`
|
|
f64_eq = 0x61,
|
|
/// Uses `tag`
|
|
f64_ne = 0x62,
|
|
/// Uses `tag`
|
|
f64_lt = 0x63,
|
|
/// Uses `tag`
|
|
f64_gt = 0x64,
|
|
/// Uses `tag`
|
|
f64_le = 0x65,
|
|
/// Uses `tag`
|
|
f64_ge = 0x66,
|
|
/// Uses `tag`
|
|
i32_clz = 0x67,
|
|
/// Uses `tag`
|
|
i32_ctz = 0x68,
|
|
/// Uses `tag`
|
|
i32_popcnt = 0x69,
|
|
/// Uses `tag`
|
|
i32_add = 0x6A,
|
|
/// Uses `tag`
|
|
i32_sub = 0x6B,
|
|
/// Uses `tag`
|
|
i32_mul = 0x6C,
|
|
/// Uses `tag`
|
|
i32_div_s = 0x6D,
|
|
/// Uses `tag`
|
|
i32_div_u = 0x6E,
|
|
/// Uses `tag`
|
|
i32_rem_s = 0x6F,
|
|
/// Uses `tag`
|
|
i32_rem_u = 0x70,
|
|
/// Uses `tag`
|
|
i32_and = 0x71,
|
|
/// Uses `tag`
|
|
i32_or = 0x72,
|
|
/// Uses `tag`
|
|
i32_xor = 0x73,
|
|
/// Uses `tag`
|
|
i32_shl = 0x74,
|
|
/// Uses `tag`
|
|
i32_shr_s = 0x75,
|
|
/// Uses `tag`
|
|
i32_shr_u = 0x76,
|
|
/// Uses `tag`
|
|
i64_clz = 0x79,
|
|
/// Uses `tag`
|
|
i64_ctz = 0x7A,
|
|
/// Uses `tag`
|
|
i64_popcnt = 0x7B,
|
|
/// Uses `tag`
|
|
i64_add = 0x7C,
|
|
/// Uses `tag`
|
|
i64_sub = 0x7D,
|
|
/// Uses `tag`
|
|
i64_mul = 0x7E,
|
|
/// Uses `tag`
|
|
i64_div_s = 0x7F,
|
|
/// Uses `tag`
|
|
i64_div_u = 0x80,
|
|
/// Uses `tag`
|
|
i64_rem_s = 0x81,
|
|
/// Uses `tag`
|
|
i64_rem_u = 0x82,
|
|
/// Uses `tag`
|
|
i64_and = 0x83,
|
|
/// Uses `tag`
|
|
i64_or = 0x84,
|
|
/// Uses `tag`
|
|
i64_xor = 0x85,
|
|
/// Uses `tag`
|
|
i64_shl = 0x86,
|
|
/// Uses `tag`
|
|
i64_shr_s = 0x87,
|
|
/// Uses `tag`
|
|
i64_shr_u = 0x88,
|
|
/// Uses `tag`
|
|
f32_abs = 0x8B,
|
|
/// Uses `tag`
|
|
f32_neg = 0x8C,
|
|
/// Uses `tag`
|
|
f32_ceil = 0x8D,
|
|
/// Uses `tag`
|
|
f32_floor = 0x8E,
|
|
/// Uses `tag`
|
|
f32_trunc = 0x8F,
|
|
/// Uses `tag`
|
|
f32_nearest = 0x90,
|
|
/// Uses `tag`
|
|
f32_sqrt = 0x91,
|
|
/// Uses `tag`
|
|
f32_add = 0x92,
|
|
/// Uses `tag`
|
|
f32_sub = 0x93,
|
|
/// Uses `tag`
|
|
f32_mul = 0x94,
|
|
/// Uses `tag`
|
|
f32_div = 0x95,
|
|
/// Uses `tag`
|
|
f32_min = 0x96,
|
|
/// Uses `tag`
|
|
f32_max = 0x97,
|
|
/// Uses `tag`
|
|
f32_copysign = 0x98,
|
|
/// Uses `tag`
|
|
f64_abs = 0x99,
|
|
/// Uses `tag`
|
|
f64_neg = 0x9A,
|
|
/// Uses `tag`
|
|
f64_ceil = 0x9B,
|
|
/// Uses `tag`
|
|
f64_floor = 0x9C,
|
|
/// Uses `tag`
|
|
f64_trunc = 0x9D,
|
|
/// Uses `tag`
|
|
f64_nearest = 0x9E,
|
|
/// Uses `tag`
|
|
f64_sqrt = 0x9F,
|
|
/// Uses `tag`
|
|
f64_add = 0xA0,
|
|
/// Uses `tag`
|
|
f64_sub = 0xA1,
|
|
/// Uses `tag`
|
|
f64_mul = 0xA2,
|
|
/// Uses `tag`
|
|
f64_div = 0xA3,
|
|
/// Uses `tag`
|
|
f64_min = 0xA4,
|
|
/// Uses `tag`
|
|
f64_max = 0xA5,
|
|
/// Uses `tag`
|
|
f64_copysign = 0xA6,
|
|
/// Uses `tag`
|
|
i32_wrap_i64 = 0xA7,
|
|
/// Uses `tag`
|
|
i32_trunc_f32_s = 0xA8,
|
|
/// Uses `tag`
|
|
i32_trunc_f32_u = 0xA9,
|
|
/// Uses `tag`
|
|
i32_trunc_f64_s = 0xAA,
|
|
/// Uses `tag`
|
|
i32_trunc_f64_u = 0xAB,
|
|
/// Uses `tag`
|
|
i64_extend_i32_s = 0xAC,
|
|
/// Uses `tag`
|
|
i64_extend_i32_u = 0xAD,
|
|
/// Uses `tag`
|
|
i64_trunc_f32_s = 0xAE,
|
|
/// Uses `tag`
|
|
i64_trunc_f32_u = 0xAF,
|
|
/// Uses `tag`
|
|
i64_trunc_f64_s = 0xB0,
|
|
/// Uses `tag`
|
|
i64_trunc_f64_u = 0xB1,
|
|
/// Uses `tag`
|
|
f32_convert_i32_s = 0xB2,
|
|
/// Uses `tag`
|
|
f32_convert_i32_u = 0xB3,
|
|
/// Uses `tag`
|
|
f32_convert_i64_s = 0xB4,
|
|
/// Uses `tag`
|
|
f32_convert_i64_u = 0xB5,
|
|
/// Uses `tag`
|
|
f32_demote_f64 = 0xB6,
|
|
/// Uses `tag`
|
|
f64_convert_i32_s = 0xB7,
|
|
/// Uses `tag`
|
|
f64_convert_i32_u = 0xB8,
|
|
/// Uses `tag`
|
|
f64_convert_i64_s = 0xB9,
|
|
/// Uses `tag`
|
|
f64_convert_i64_u = 0xBA,
|
|
/// Uses `tag`
|
|
f64_promote_f32 = 0xBB,
|
|
/// Uses `tag`
|
|
i32_reinterpret_f32 = 0xBC,
|
|
/// Uses `tag`
|
|
i64_reinterpret_f64 = 0xBD,
|
|
/// Uses `tag`
|
|
f32_reinterpret_i32 = 0xBE,
|
|
/// Uses `tag`
|
|
f64_reinterpret_i64 = 0xBF,
|
|
/// Uses `tag`
|
|
i32_extend8_s = 0xC0,
|
|
/// Uses `tag`
|
|
i32_extend16_s = 0xC1,
|
|
/// Uses `tag`
|
|
i64_extend8_s = 0xC2,
|
|
/// Uses `tag`
|
|
i64_extend16_s = 0xC3,
|
|
/// Uses `tag`
|
|
i64_extend32_s = 0xC4,
|
|
/// The instruction consists of a prefixed opcode.
|
|
/// The prefixed opcode can be found at payload's index.
|
|
///
|
|
/// The `data` field depends on the extension instruction and
|
|
/// may contain additional data.
|
|
misc_prefix = 0xFC,
|
|
/// The instruction consists of a simd opcode.
|
|
/// The actual simd-opcode is found at payload's index.
|
|
///
|
|
/// The `data` field depends on the simd instruction and
|
|
/// may contain additional data.
|
|
simd_prefix = 0xFD,
|
|
/// The instruction consists of an atomics opcode.
|
|
/// The actual atomics-opcode is found at payload's index.
|
|
///
|
|
/// The `data` field depends on the atomics instruction and
|
|
/// may contain additional data.
|
|
atomics_prefix = 0xFE,
|
|
/// Contains a symbol to a memory address
|
|
/// Uses `label`
|
|
///
|
|
/// Note: This uses `0xFF` as value as it is unused and not reserved
|
|
/// by the wasm specification, making it safe to use.
|
|
memory_address = 0xFF,
|
|
|
|
/// From a given wasm opcode, returns a MIR tag.
|
|
pub fn fromOpcode(opcode: std.wasm.Opcode) Tag {
|
|
return @as(Tag, @enumFromInt(@intFromEnum(opcode))); // Given `Opcode` is not present as a tag for MIR yet
|
|
}
|
|
|
|
/// Returns a wasm opcode from a given MIR tag.
|
|
pub fn toOpcode(self: Tag) std.wasm.Opcode {
|
|
return @as(std.wasm.Opcode, @enumFromInt(@intFromEnum(self)));
|
|
}
|
|
};
|
|
|
|
/// All instructions contain a 4-byte payload, which is contained within
|
|
/// this union. `Tag` determines which union tag is active, as well as
|
|
/// how to interpret the data within.
|
|
pub const Data = union {
|
|
/// Uses no additional data
|
|
tag: void,
|
|
/// Contains the result type of a block
|
|
///
|
|
/// Used by `block` and `loop`
|
|
block_type: u8,
|
|
/// Contains an u32 index into a wasm section entry, such as a local.
|
|
/// Note: This is not an index to another instruction.
|
|
///
|
|
/// Used by e.g. `local_get`, `local_set`, etc.
|
|
label: u32,
|
|
/// A 32-bit immediate value.
|
|
///
|
|
/// Used by `i32_const`
|
|
imm32: i32,
|
|
/// A 32-bit float value
|
|
///
|
|
/// Used by `f32_float`
|
|
float32: f32,
|
|
/// Index into `extra`. Meaning of what can be found there is context-dependent.
|
|
///
|
|
/// Used by e.g. `br_table`
|
|
payload: u32,
|
|
};
|
|
};
|
|
|
|
pub fn deinit(self: *Mir, gpa: std.mem.Allocator) void {
|
|
self.instructions.deinit(gpa);
|
|
gpa.free(self.extra);
|
|
self.* = undefined;
|
|
}
|
|
|
|
pub fn extraData(self: *const Mir, comptime T: type, index: usize) struct { data: T, end: usize } {
|
|
const fields = std.meta.fields(T);
|
|
var i: usize = index;
|
|
var result: T = undefined;
|
|
inline for (fields) |field| {
|
|
@field(result, field.name) = switch (field.type) {
|
|
u32 => self.extra[i],
|
|
else => |field_type| @compileError("Unsupported field type " ++ @typeName(field_type)),
|
|
};
|
|
i += 1;
|
|
}
|
|
|
|
return .{ .data = result, .end = i };
|
|
}
|
|
|
|
pub const JumpTable = struct {
|
|
/// Length of the jump table and the amount of entries it contains (includes default)
|
|
length: u32,
|
|
};
|
|
|
|
/// Stores an unsigned 64bit integer
|
|
/// into a 32bit most significant bits field
|
|
/// and a 32bit least significant bits field.
|
|
///
|
|
/// This uses an unsigned integer rather than a signed integer
|
|
/// as we can easily store those into `extra`
|
|
pub const Imm64 = struct {
|
|
msb: u32,
|
|
lsb: u32,
|
|
|
|
pub fn fromU64(imm: u64) Imm64 {
|
|
return .{
|
|
.msb = @as(u32, @truncate(imm >> 32)),
|
|
.lsb = @as(u32, @truncate(imm)),
|
|
};
|
|
}
|
|
|
|
pub fn toU64(self: Imm64) u64 {
|
|
var result: u64 = 0;
|
|
result |= @as(u64, self.msb) << 32;
|
|
result |= @as(u64, self.lsb);
|
|
return result;
|
|
}
|
|
};
|
|
|
|
pub const Float64 = struct {
|
|
msb: u32,
|
|
lsb: u32,
|
|
|
|
pub fn fromFloat64(float: f64) Float64 {
|
|
const tmp = @as(u64, @bitCast(float));
|
|
return .{
|
|
.msb = @as(u32, @truncate(tmp >> 32)),
|
|
.lsb = @as(u32, @truncate(tmp)),
|
|
};
|
|
}
|
|
|
|
pub fn toF64(self: Float64) f64 {
|
|
@as(f64, @bitCast(self.toU64()));
|
|
}
|
|
|
|
pub fn toU64(self: Float64) u64 {
|
|
var result: u64 = 0;
|
|
result |= @as(u64, self.msb) << 32;
|
|
result |= @as(u64, self.lsb);
|
|
return result;
|
|
}
|
|
};
|
|
|
|
pub const MemArg = struct {
|
|
offset: u32,
|
|
alignment: u32,
|
|
};
|
|
|
|
/// Represents a memory address, which holds both the pointer
|
|
/// or the parent pointer and the offset to it.
|
|
pub const Memory = struct {
|
|
pointer: u32,
|
|
offset: u32,
|
|
};
|
|
|
|
/// Maps a source line with wasm bytecode
|
|
pub const DbgLineColumn = struct {
|
|
line: u32,
|
|
column: u32,
|
|
};
|