mirror of
https://github.com/odin-lang/Odin.git
synced 2026-06-19 16:42:33 +00:00
a4f08f8307
Each ISA's hand-written ENCODING_TABLE (the single source of truth) now lives in a per-arch tablegen/ metaprogram that flattens it and serializes committed binary blobs; the library #loads those into @(rodata) at compile time rather than compiling a table body. No arch keeps encoding_table.odin or decoding_tables.odin -- only a generated tables.odin loader and tables/*.bin. * Two-stage, type-checked pipeline: tablegen Stage A emits human-readable generated Odin, which compiles and serializes the blobs in Stage B. * encode() goes through encoding_forms(m); decoders are unchanged apart from x86's flattened 2-D index. Decode tables are byte-identical to the old ones. * build.lua: a LuaJIT driver for the metaprograms, validations, and tests, with cross-platform gating and a clear report. * Docs refreshed; the obsolete forward-looking plan in cross_arch_design.md trimmed to what was actually built. * Attribution headers added to all rexcode source files; the generators emit them so generated files keep them.
562 lines
17 KiB
Odin
562 lines
17 KiB
Odin
// rexcode · Brendan Punsky (dotbmp@github), original author
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package rexcode_arm64
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import "core:strings"
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import "core:reflect"
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import "core:os"
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import "core:io"
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import "../isa"
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// =============================================================================
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// AArch64 PRINTER
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// =============================================================================
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//
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// Canonical Arm assembly syntax:
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//
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// add x0, x1, x2 (R-type)
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// add x0, x1, #16 (imm)
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// add x0, x1, x2, lsl #3 (shifted register)
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// add x0, x1, w2, sxtw #2 (extended register)
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// ldr x0, [x1, #8] (offset)
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// ldr x0, [x1, #-8]! (pre-index)
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// ldr x0, [x1], #8 (post-index)
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// ldr x0, [x1, x2, lsl #3] (register offset)
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// ldr x0, [x1, w2, sxtw #2] (extended-register offset)
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// b .L0 (relative)
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// b.eq .L0 (B.cond with condition suffix)
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// cbz x0, .L0
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// tbz x0, #5, .L0
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// fadd d0, d1, d2 (FP scalar)
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// fmov w0, s0 (cross-class FMOV)
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//
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// FP mnemonics: the enum names already include the dot via the underscore-
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// to-dot rule (FADD_S -> fadd.s). For the canonical assembly form we want
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// no dot inside .S/.D (it's just `fadd s0, s0, s0`) -- the operand types
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// disambiguate. So the printer special-cases the FP mnemonics.
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Token :: isa.Token
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Token_Kind :: isa.Token_Kind
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Print_Options :: isa.Print_Options
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Print_Result :: isa.Print_Result
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DEFAULT_PRINT_OPTIONS :: isa.DEFAULT_PRINT_OPTIONS
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@(rodata, private="file")
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COND_NAMES := [16]string{
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"eq", "ne", "cs", "cc", "mi", "pl", "vs", "vc",
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"hi", "ls", "ge", "lt", "gt", "le", "al", "nv",
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}
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@(rodata, private="file")
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SHIFT_NAMES := [4]string{ "lsl", "lsr", "asr", "ror" }
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@(rodata, private="file")
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EXTEND_NAMES := [8]string{
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"uxtb", "uxth", "uxtw", "uxtx",
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"sxtb", "sxth", "sxtw", "sxtx",
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}
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mnemonic_to_string :: proc(m: Mnemonic, lowercase: bool = true, allocator := context.temp_allocator) -> string {
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sb := strings.builder_make(allocator)
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write_mnemonic(&sb, m, !lowercase)
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return strings.to_string(sb)
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}
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register_name :: proc(r: Register, lowercase: bool = true, allocator := context.temp_allocator) -> string {
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sb := strings.builder_make(allocator)
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write_register(&sb, r, !lowercase)
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return strings.to_string(sb)
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}
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// =============================================================================
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// Core sbprint
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// =============================================================================
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sbprint :: proc(
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sb: ^strings.Builder,
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instructions: []Instruction,
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inst_info: []Instruction_Info,
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label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil,
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options: ^Print_Options = nil,
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label_names: ^map[u32]string = nil,
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) {
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opts := options
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if opts == nil {
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@(static) defaults := DEFAULT_PRINT_OPTIONS
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opts = &defaults
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}
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offset_to_label: map[u32]u32
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defer delete(offset_to_label)
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for ld, id in label_defs {
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if ld != LABEL_UNDEFINED {
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offset_to_label[u32(ld)] = u32(id)
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}
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}
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for i in 0..<len(instructions) {
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inst := &instructions[i]
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offset := u32(i) * 4
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if i < len(inst_info) {
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offset = inst_info[i].offset
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}
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if label_id, has := offset_to_label[offset]; has {
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write_label(sb, label_id, label_names, opts)
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strings.write_byte(sb, ':')
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strings.write_string(sb, opts.separator)
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}
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strings.write_string(sb, opts.indent)
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if opts.show_offsets {
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isa.print_hex(sb, u64(offset), opts)
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strings.write_string(sb, ": ")
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}
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write_full_mnemonic(sb, inst, opts.uppercase)
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// B.cond's condition is encoded into the mnemonic suffix (b.eq),
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// so when printing we skip the first operand (it IS the cond).
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start_slot := 0
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if inst.mnemonic == .B_COND && inst.operand_count >= 1 && inst.ops[0].kind == .COND {
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start_slot = 1
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}
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if int(inst.operand_count) > start_slot {
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strings.write_byte(sb, ' ')
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for slot in start_slot..<int(inst.operand_count) {
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if slot > start_slot {
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strings.write_byte(sb, ',')
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if opts.space_after_comma { strings.write_byte(sb, ' ') }
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}
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write_operand(sb, &inst.ops[slot], offset_to_label, label_names, opts)
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}
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}
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strings.write_string(sb, opts.separator)
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}
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}
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sbprintln :: proc(
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sb: ^strings.Builder,
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instructions: []Instruction,
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inst_info: []Instruction_Info,
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label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil,
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options: ^Print_Options = nil,
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label_names: ^map[u32]string = nil,
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) {
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sbprint(sb, instructions, inst_info, label_defs, tokens, options, label_names)
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strings.write_byte(sb, '\n')
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}
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// =============================================================================
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// Sink wrappers
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// =============================================================================
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print :: proc(
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) {
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sb := strings.builder_make(context.temp_allocator)
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sbprint(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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os.write_string(os.stdout, strings.to_string(sb))
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}
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println :: proc(
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) {
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sb := strings.builder_make(context.temp_allocator)
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sbprintln(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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os.write_string(os.stdout, strings.to_string(sb))
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}
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aprint :: proc(
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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allocator := context.allocator,
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) -> string {
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sb := strings.builder_make(allocator)
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sbprint(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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return strings.to_string(sb)
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}
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aprintln :: proc(
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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allocator := context.allocator,
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) -> string {
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sb := strings.builder_make(allocator)
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sbprintln(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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return strings.to_string(sb)
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}
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tprint :: proc(
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) -> string {
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sb := strings.builder_make(context.temp_allocator)
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sbprint(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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return strings.to_string(sb)
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}
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tprintln :: proc(
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) -> string {
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sb := strings.builder_make(context.temp_allocator)
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sbprintln(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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return strings.to_string(sb)
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}
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bprint :: proc(
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buf: []u8,
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) -> string {
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sb := strings.builder_from_bytes(buf)
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sbprint(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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return strings.to_string(sb)
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}
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bprintln :: proc(
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buf: []u8,
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) -> string {
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sb := strings.builder_from_bytes(buf)
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sbprintln(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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return strings.to_string(sb)
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}
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fprint :: proc(
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fd: ^os.File,
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) {
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sb := strings.builder_make(context.temp_allocator)
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sbprint(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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os.write_string(fd, strings.to_string(sb))
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}
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fprintln :: proc(
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fd: ^os.File,
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) {
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sb := strings.builder_make(context.temp_allocator)
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sbprintln(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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os.write_string(fd, strings.to_string(sb))
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}
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wprint :: proc(
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w: io.Writer,
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) {
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sb := strings.builder_make(context.temp_allocator)
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sbprint(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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io.write_string(w, strings.to_string(sb))
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}
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wprintln :: proc(
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w: io.Writer,
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instructions: []Instruction, inst_info: []Instruction_Info, label_defs: []Label_Definition,
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tokens: ^[dynamic]Token = nil, options: ^Print_Options = nil, label_names: ^map[u32]string = nil,
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) {
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sb := strings.builder_make(context.temp_allocator)
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sbprintln(&sb, instructions, inst_info, label_defs, tokens, options, label_names)
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io.write_string(w, strings.to_string(sb))
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}
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// =============================================================================
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// Internal writers
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// =============================================================================
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// write_full_mnemonic handles a few special cases that need transformation:
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// * Suffix family mnemonics (ADD_IMM/ADD_SR/ADD_ER) collapse to `add`.
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// * B_COND prints as `b.<cond>` using the first operand's cond payload.
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// * Mov-wide / shifted/extended/imm variants all share the canonical
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// ARM ARM mnemonic; the suffix is for our internal disambiguation.
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@(private="file")
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write_full_mnemonic :: proc(sb: ^strings.Builder, inst: ^Instruction, uppercase: bool) {
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// B_COND -> `b.<cond>` based on the first operand.
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if inst.mnemonic == .B_COND && inst.operand_count >= 1 && inst.ops[0].kind == .COND {
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strings.write_string(sb, uppercase ? "B." : "b.")
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c := inst.ops[0].cond & 0xF
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cn := COND_NAMES[c]
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if uppercase {
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for i in 0..<len(cn) {
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ch := cn[i]
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if ch >= 'a' && ch <= 'z' { strings.write_byte(sb, ch - 32) } else { strings.write_byte(sb, ch) }
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}
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} else {
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strings.write_string(sb, cn)
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}
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return
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}
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write_mnemonic(sb, inst.mnemonic, uppercase)
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}
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@(private="file")
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write_mnemonic :: proc(sb: ^strings.Builder, m: Mnemonic, uppercase: bool) {
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name, ok := reflect.enum_name_from_value(m)
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if !ok { strings.write_string(sb, "<?>"); return }
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// Strip internal disambiguator suffixes -- the user-facing mnemonic
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// is just the base name (ADD_IMM -> add, ADD_SR -> add, LDR_LIT -> ldr,
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// CCMP_REG -> ccmp, MSR_REG -> msr, FMOV_GEN -> fmov, ...).
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n := len(name)
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suffixes := []string{ "_IMM", "_SR", "_ER", "_LIT", "_REG", "_COND", "_GEN" }
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for s in suffixes {
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if n > len(s) {
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tail := name[n - len(s):]
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if tail == s {
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n -= len(s)
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break
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}
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}
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}
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for i in 0..<n {
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c := name[i]
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if c == '_' {
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strings.write_byte(sb, '.')
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} else if !uppercase && c >= 'A' && c <= 'Z' {
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strings.write_byte(sb, c + 32)
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} else {
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strings.write_byte(sb, c)
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}
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}
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}
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@(private="file")
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write_register :: proc(sb: ^strings.Builder, r: Register, uppercase: bool) {
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if r == NONE { strings.write_string(sb, "<none>"); return }
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cls := reg_class(r)
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hw := reg_hw(r)
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// SP and ZR have named forms; the rest are letter+number.
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switch cls {
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case REG_XSP:
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strings.write_string(sb, uppercase ? "SP" : "sp")
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return
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case REG_WSP:
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strings.write_string(sb, uppercase ? "WSP" : "wsp")
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return
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case REG_X:
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if hw == 31 {
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strings.write_string(sb, uppercase ? "XZR" : "xzr")
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return
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}
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strings.write_byte(sb, uppercase ? 'X' : 'x')
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write_decimal_u32(sb, u32(hw))
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case REG_W:
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if hw == 31 {
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strings.write_string(sb, uppercase ? "WZR" : "wzr")
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return
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}
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strings.write_byte(sb, uppercase ? 'W' : 'w')
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write_decimal_u32(sb, u32(hw))
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case REG_B:
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strings.write_byte(sb, uppercase ? 'B' : 'b')
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write_decimal_u32(sb, u32(hw))
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case REG_H:
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strings.write_byte(sb, uppercase ? 'H' : 'h')
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write_decimal_u32(sb, u32(hw))
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case REG_S:
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strings.write_byte(sb, uppercase ? 'S' : 's')
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write_decimal_u32(sb, u32(hw))
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case REG_D:
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strings.write_byte(sb, uppercase ? 'D' : 'd')
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write_decimal_u32(sb, u32(hw))
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case REG_Q:
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strings.write_byte(sb, uppercase ? 'Q' : 'q')
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write_decimal_u32(sb, u32(hw))
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case REG_V:
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strings.write_byte(sb, uppercase ? 'V' : 'v')
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write_decimal_u32(sb, u32(hw))
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case REG_Z:
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strings.write_byte(sb, uppercase ? 'Z' : 'z')
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write_decimal_u32(sb, u32(hw))
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case REG_P:
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strings.write_byte(sb, uppercase ? 'P' : 'p')
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write_decimal_u32(sb, u32(hw))
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}
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}
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@(private="file")
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write_operand :: proc(
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sb: ^strings.Builder,
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op: ^Operand,
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offset_to_label: map[u32]u32,
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label_names: ^map[u32]string,
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opts: ^Print_Options,
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) {
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switch op.kind {
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case .NONE:
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case .REGISTER:
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write_register(sb, op.reg, opts.uppercase)
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case .IMMEDIATE:
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strings.write_byte(sb, '#')
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write_signed_decimal(sb, op.immediate)
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case .COND:
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c := op.cond & 0xF
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s := COND_NAMES[c]
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if opts.uppercase {
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for i in 0..<len(s) {
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ch := s[i]
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if ch >= 'a' && ch <= 'z' { strings.write_byte(sb, ch - 32) } else { strings.write_byte(sb, ch) }
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}
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} else {
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strings.write_string(sb, s)
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}
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case .SHIFTED_REG:
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write_register(sb, op.shifted.reg, opts.uppercase)
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if op.shifted.amount != 0 || op.shifted.type != .LSL {
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if opts.space_after_comma {
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strings.write_string(sb, ", ")
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} else {
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strings.write_byte(sb, ',')
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}
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strings.write_string(sb, SHIFT_NAMES[u8(op.shifted.type) & 0x3])
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strings.write_string(sb, " #")
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write_decimal_u32(sb, u32(op.shifted.amount))
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}
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case .EXTENDED_REG:
|
|
write_register(sb, op.extended.reg, opts.uppercase)
|
|
if opts.space_after_comma {
|
|
strings.write_string(sb, ", ")
|
|
} else {
|
|
strings.write_byte(sb, ',')
|
|
}
|
|
strings.write_string(sb, EXTEND_NAMES[u8(op.extended.extend) & 0x7])
|
|
if op.extended.amount != 0 {
|
|
strings.write_string(sb, " #")
|
|
write_decimal_u32(sb, u32(op.extended.amount))
|
|
}
|
|
|
|
case .MEMORY:
|
|
write_memory(sb, op.mem, opts)
|
|
|
|
case .RELATIVE:
|
|
target := u32(op.relative)
|
|
if id, has := offset_to_label[target]; has {
|
|
write_label(sb, id, label_names, opts)
|
|
} else {
|
|
isa.print_hex(sb, u64(target), opts)
|
|
}
|
|
}
|
|
}
|
|
|
|
@(private="file")
|
|
write_memory :: proc(sb: ^strings.Builder, m: Memory, opts: ^Print_Options) {
|
|
strings.write_byte(sb, '[')
|
|
write_register(sb, m.base, opts.uppercase)
|
|
|
|
switch m.mode {
|
|
case .OFFSET:
|
|
if m.disp != 0 {
|
|
if opts.space_after_comma {
|
|
strings.write_string(sb, ", #")
|
|
} else {
|
|
strings.write_string(sb, ",#")
|
|
}
|
|
write_signed_decimal(sb, i64(m.disp))
|
|
}
|
|
strings.write_byte(sb, ']')
|
|
|
|
case .PRE_INDEXED:
|
|
if opts.space_after_comma {
|
|
strings.write_string(sb, ", #")
|
|
} else {
|
|
strings.write_string(sb, ",#")
|
|
}
|
|
write_signed_decimal(sb, i64(m.disp))
|
|
strings.write_string(sb, "]!")
|
|
|
|
case .POST_INDEXED:
|
|
strings.write_string(sb, "], #")
|
|
write_signed_decimal(sb, i64(m.disp))
|
|
|
|
case .REG_OFFSET:
|
|
strings.write_string(sb, ", ")
|
|
write_register(sb, m.index, opts.uppercase)
|
|
if m.shift != 0 {
|
|
strings.write_string(sb, ", lsl #")
|
|
write_decimal_u32(sb, u32(m.shift))
|
|
}
|
|
strings.write_byte(sb, ']')
|
|
|
|
case .EXT_REG_OFFSET:
|
|
strings.write_string(sb, ", ")
|
|
write_register(sb, m.index, opts.uppercase)
|
|
strings.write_string(sb, ", ")
|
|
strings.write_string(sb, EXTEND_NAMES[u8(m.extend) & 0x7])
|
|
if m.shift != 0 {
|
|
strings.write_string(sb, " #")
|
|
write_decimal_u32(sb, u32(m.shift))
|
|
}
|
|
strings.write_byte(sb, ']')
|
|
|
|
case .LITERAL:
|
|
strings.write_byte(sb, ']') // shouldn't normally appear
|
|
}
|
|
}
|
|
|
|
@(private="file")
|
|
write_label :: proc(
|
|
sb: ^strings.Builder,
|
|
label_id: u32,
|
|
label_names: ^map[u32]string,
|
|
opts: ^Print_Options,
|
|
) {
|
|
if label_names != nil {
|
|
if name, has := label_names^[label_id]; has {
|
|
strings.write_string(sb, name)
|
|
return
|
|
}
|
|
}
|
|
strings.write_string(sb, opts.label_prefix)
|
|
write_decimal_u32(sb, label_id)
|
|
}
|
|
|
|
@(private="file")
|
|
write_decimal_u32 :: proc(sb: ^strings.Builder, v: u32) {
|
|
if v == 0 { strings.write_byte(sb, '0'); return }
|
|
buf: [10]u8
|
|
i := 0
|
|
n := v
|
|
for n > 0 { buf[i] = '0' + u8(n % 10); n /= 10; i += 1 }
|
|
for j := i - 1; j >= 0; j -= 1 { strings.write_byte(sb, buf[j]) }
|
|
}
|
|
|
|
@(private="file")
|
|
write_signed_decimal :: proc(sb: ^strings.Builder, v: i64) {
|
|
if v < 0 {
|
|
strings.write_byte(sb, '-')
|
|
n := u64(-(v + 1)) + 1
|
|
write_decimal_u64(sb, n)
|
|
} else {
|
|
write_decimal_u64(sb, u64(v))
|
|
}
|
|
}
|
|
|
|
@(private="file")
|
|
write_decimal_u64 :: proc(sb: ^strings.Builder, v: u64) {
|
|
if v == 0 { strings.write_byte(sb, '0'); return }
|
|
buf: [20]u8
|
|
i := 0
|
|
n := v
|
|
for n > 0 { buf[i] = '0' + u8(n % 10); n /= 10; i += 1 }
|
|
for j := i - 1; j >= 0; j -= 1 { strings.write_byte(sb, buf[j]) }
|
|
}
|