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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.
35 lines
984 B
Odin
35 lines
984 B
Odin
// rexcode · Brendan Punsky (dotbmp@github), original author
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package rexcode_mos65816
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// =============================================================================
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// 65816 RELOCATIONS
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// =============================================================================
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//
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// Per the cross-arch design (§2.4): each arch owns its own Relocation_Type
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// and Relocation struct. The 65816's relocation kinds reflect the four
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// address widths it can patch:
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//
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// ABS16 2-byte LE absolute, low 16 of (base + target + addend)
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// ABS24 3-byte LE absolute, low 24 of (base + target + addend)
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// REL8 signed 8-bit PC-relative (target - (offset + 1))
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// REL16 signed 16-bit PC-relative (target - (offset + 2)) -- BRL, PER
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Relocation_Type :: enum u8 {
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NONE = 0,
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ABS16,
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ABS24,
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REL8,
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REL16,
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}
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Relocation :: struct #packed {
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offset: u32,
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label_id: u32,
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addend: i32,
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type: Relocation_Type,
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size: u8,
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inst_idx: u16,
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}
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#assert(size_of(Relocation) == 16)
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