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https://github.com/odin-lang/Odin.git
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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.
65 lines
1.6 KiB
Odin
65 lines
1.6 KiB
Odin
// rexcode · Brendan Punsky (dotbmp@github), original author
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package rexcode_ppc_vle
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// =============================================================================
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// PowerPC VLE Operands
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// =============================================================================
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Operand_Kind :: enum u8 {
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NONE,
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REGISTER,
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IMMEDIATE,
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MEMORY,
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RELATIVE,
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}
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Memory :: struct #packed {
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base: Register,
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index: Register,
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disp: i64,
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}
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#assert(size_of(Memory) == 12)
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@(require_results)
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mem_d :: #force_inline proc "contextless" (base: Register, disp: i64) -> Memory {
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return Memory{base = base, index = NONE, disp = disp}
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}
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@(require_results)
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mem_x :: #force_inline proc "contextless" (base, index: Register) -> Memory {
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return Memory{base = base, index = index, disp = 0}
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}
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Operand :: struct #packed {
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using _: struct #raw_union {
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reg: Register,
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mem: Memory,
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immediate: i64,
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relative: i64,
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},
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kind: Operand_Kind,
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size: u8,
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_: [2]u8,
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}
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@(require_results)
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op_reg :: #force_inline proc "contextless" (r: Register) -> Operand {
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return Operand{reg = r, kind = .REGISTER}
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}
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@(require_results)
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op_imm :: #force_inline proc "contextless" (v: i64) -> Operand {
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return Operand{immediate = v, kind = .IMMEDIATE}
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}
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@(require_results)
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op_mem :: #force_inline proc "contextless" (m: Memory) -> Operand {
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return Operand{mem = m, kind = .MEMORY}
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}
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@(require_results)
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op_label :: #force_inline proc "contextless" (label_id: u32) -> Operand {
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return Operand{relative = i64(label_id), kind = .RELATIVE}
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}
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@(require_results)
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op_rel_offset :: #force_inline proc "contextless" (off: i64) -> Operand {
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return Operand{relative = off, kind = .RELATIVE}
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}
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