mirror of
https://github.com/odin-lang/Odin.git
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95df04fbe1
Move all ten ISA packages (x86, arm32, arm64, mips, riscv, ppc, ppc_vle, rsp, mos6502, mos65816) from core/rexcode/<arch> to core/rexcode/isa/<arch>, so the import pattern is now `import "core:rexcode/isa/x86"`. The shared core stays at core:rexcode/isa. Mechanical: relative `import "../isa"` / "../../isa" -> absolute "core:rexcode/isa" (the only path that survives the move; the "../" and "../.." self/generated imports move with their packages). build.lua now builds paths as <root>/isa/<name>; stale `cd <arch>` hints in the verify tools and the doc.odin paths updated. WASM stays at core/rexcode/wasm for now -- it is an IR, not an ISA, and will move under the forthcoming core:rexcode/ir once that layer lands. All 10 arches gen/builders/check/test green; import core:rexcode/isa/x86 verified working; wasm still compiles.
114 lines
4.5 KiB
Odin
114 lines
4.5 KiB
Odin
// rexcode · Brendan Punsky (dotbmp@github), original author
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package rexcode_x86
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// =============================================================================
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// GENERATED FILE - DO NOT EDIT
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// =============================================================================
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//
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// Loads the flat binary encode/decode tables into @(rodata) and exposes the
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// accessors the encoder/decoder drive. Produced by tablegen:
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//
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// odin run tablegen # Stage A: ENCODING_TABLE -> generated/ + this file
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// odin run tablegen/generated # Stage B: typed Odin literals -> tables/*.bin
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//
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// The .bin blobs are raw, host-endian, packed struct images.
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// -----------------------------------------------------------------------------
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// Subsidiary table types (generated scaffolding)
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// -----------------------------------------------------------------------------
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// Companion run index: ENCODE_RUNS[mnemonic] -> contiguous run in ENCODE_FORMS.
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Encode_Run :: struct {
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start: u32, // start index in ENCODE_FORMS
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count: u32, // number of forms for this mnemonic
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}
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// Precomputed extraction of mod, reg, rm fields from a ModR/M byte.
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ModRM_Info :: struct #packed {
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mod: u8,
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reg: u8,
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rm: u8,
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has_sib: bool,
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disp_size: u8,
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}
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// Precomputed extraction of scale, index, base fields from a SIB byte.
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SIB_Info :: struct #packed {
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scale: u8,
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index: u8,
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base: u8,
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}
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// Information needed to decode an instruction given its opcode bytes.
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Decode_Entry :: struct {
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esc: Escape,
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prefix: u8,
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opcode: u8,
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ext: u8,
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mnemonic: Mnemonic,
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ops: [4]Operand_Type,
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enc: [4]Operand_Encoding,
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flags: Encoding_Flags,
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}
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VEX_Decode_Entry :: struct {
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esc: Escape,
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prefix: u8,
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opcode: u8,
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ext: u8,
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vex_w: VEX_W,
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vex_l: VEX_L,
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mnemonic: Mnemonic,
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ops: [4]Operand_Type,
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enc: [4]Operand_Encoding,
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flags: Encoding_Flags,
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}
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// (start, count) into a *_DECODE_ENTRIES array. Index tables are stored flat:
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// a logical [4][256] is loaded as [1024]; address with `didx`.
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Decode_Index :: struct {
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start: u16,
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count: u8,
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}
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// -----------------------------------------------------------------------------
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// Loaded tables (rodata, embedded from tables/*.bin at compile time)
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// -----------------------------------------------------------------------------
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@(rodata) ENCODE_FORMS := #load("tables/x86.encode_forms.bin", []Encoding)
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@(rodata) ENCODE_RUNS := #load("tables/x86.encode_runs.bin", []Encode_Run)
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@(rodata) MODRM_TABLE := #load("tables/x86.modrm.bin", []ModRM_Info)
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@(rodata) SIB_TABLE := #load("tables/x86.sib.bin", []SIB_Info)
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@(rodata) LEGACY_DECODE_ENTRIES := #load("tables/x86.legacy.bin", []Decode_Entry)
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@(rodata) VEX_DECODE_ENTRIES := #load("tables/x86.vex.bin", []VEX_Decode_Entry)
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@(rodata) EVEX_DECODE_ENTRIES := #load("tables/x86.evex.bin", []VEX_Decode_Entry)
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@(rodata) DECODE_INDEX_LEGACY := #load("tables/x86.idx_legacy.bin", []Decode_Index)
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@(rodata) DECODE_INDEX_ESC_0F := #load("tables/x86.idx_0f.bin", []Decode_Index)
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@(rodata) DECODE_INDEX_ESC_0F38 := #load("tables/x86.idx_0f38.bin", []Decode_Index)
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@(rodata) DECODE_INDEX_ESC_0F3A := #load("tables/x86.idx_0f3a.bin", []Decode_Index)
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@(rodata) VEX_INDEX_0F := #load("tables/x86.vex_idx_0f.bin", []Decode_Index)
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@(rodata) VEX_INDEX_0F38 := #load("tables/x86.vex_idx_0f38.bin", []Decode_Index)
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@(rodata) VEX_INDEX_0F3A := #load("tables/x86.vex_idx_0f3a.bin", []Decode_Index)
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@(rodata) EVEX_INDEX_0F := #load("tables/x86.evex_idx_0f.bin", []Decode_Index)
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@(rodata) EVEX_INDEX_0F38 := #load("tables/x86.evex_idx_0f38.bin", []Decode_Index)
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@(rodata) EVEX_INDEX_0F3A := #load("tables/x86.evex_idx_0f3a.bin", []Decode_Index)
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// -----------------------------------------------------------------------------
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// Accessors
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// -----------------------------------------------------------------------------
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// Per-mnemonic encode forms: the run of ENCODE_FORMS belonging to `m`.
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// Replaces the old ENCODING_TABLE[m] slice; the returned view is into rodata.
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@(private, require_results)
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encoding_forms :: #force_inline proc "contextless" (m: Mnemonic) -> []Encoding {
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r := ENCODE_RUNS[u16(m)]
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return ENCODE_FORMS[r.start:][:r.count]
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}
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// Flat [prefix][opcode] lookup into a logical [4][256] index table.
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@(private, require_results)
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didx :: #force_inline proc "contextless" (t: []Decode_Index, prefix, opcode: u8) -> Decode_Index {
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return t[(int(prefix) << 8) | int(opcode)]
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}
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