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https://github.com/open-goal/jak-project
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water
112 lines
2.8 KiB
C++
112 lines
2.8 KiB
C++
/*!
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* @file registers.h
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* Definitions and conventions for x86-64 registers.
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*/
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#ifndef JAK1_REGISTERS_H
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#define JAK1_REGISTERS_H
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#include "common/common_types.h"
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namespace goal {
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enum X86R : u8 {
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RAX, // return, temp
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RCX, // arg 3
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RDX, // arg 2
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RBX, // X saved
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RSP, // stack pointer
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RBP, // X base pointer (like fp)
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RSI, // arg 1
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RDI, // arg 0
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R8, // arg 4
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R9, // arg 5, saved
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R10, // arg 6, saved (arg in GOAL only)
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R11, // arg 7, saved (arg in GOAL only)
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R12, // X saved - pp register (like s6)
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R13, // X saved - function call register (like t9)
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R14, // X saved - offset (added in GOAL x86)
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R15, // X saved - st (like s7)
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XMM0,
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XMM1,
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XMM2,
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XMM3,
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XMM4,
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XMM5,
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XMM6,
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XMM7,
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XMM8,
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XMM9,
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XMM10,
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XMM11,
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XMM12,
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XMM13,
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XMM14,
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XMM15
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};
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// the argument registers of GOAL.
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// We must have 8 to be compatible with GOAL's 8-argument function calls.
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constexpr int ARG_REG_COUNT = 8;
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// the first 6 are shared with Linux, and the last two are unique to GOAL.
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constexpr X86R ARG_REGS[ARG_REG_COUNT] = {
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X86R::RDI, X86R::RSI, X86R::RDX, X86R::RCX, X86R::R8, X86R::R9, X86R::R10, X86R::R11,
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};
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// The saved registers of GOAL. Note that RSP, RBP, R12, R13, R14, R15 shouldn't be changed by the
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// caller, but these are special registers and won't be allocated to hold variables.
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constexpr int SAVED_REG_COUNT = 4;
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constexpr X86R SAVED_REGS[SAVED_REG_COUNT] = {X86R::RBX, X86R::R9, X86R::R10, X86R::R11};
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// special registers
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constexpr X86R PP_REG = X86R::R12;
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constexpr X86R FUNC_REG = X86R::R13;
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constexpr X86R OFF_REG = X86R::R14;
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constexpr X86R ST_REG = X86R::R15;
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constexpr X86R FP_REG = X86R::RBP;
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constexpr X86R RET_REG = X86R::RAX;
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// size in bytes of a pointer
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constexpr int PTR_SIZE = 4;
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// size in bytes of a general purpose register
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constexpr int GPR_SIZE = 8;
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constexpr const char* x86_gpr_names[] = {
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"rax", "rcx", "rdx", "rbx", "rsp", "rbp", "rsi", "rdi", "r8", "r9", "r10",
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"r11", "r12", "r13", "r14", "r15", "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5",
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"xmm6", "xmm7", "xmm8", "xmm9", "xmm10", "xmm11", "xmm12", "xmm13", "xmm14", "xmm15"};
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/*
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Name Arg ID Clobber? Special
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RAX - y return
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RCX 3 y arg
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RDX 2 y arg
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RBX - n
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RSP - n stack pointer
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RBP - n base pointer
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RSI 1 y arg
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RDI 0 y arg
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R8 4 y arg
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R9 5 n arg
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R10 6 n arg
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R11 7 n arg
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R12 - n pp
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R13 - n func
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R14 - n
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R15
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*/
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bool is_gpr(u8 reg);
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u8 get_nth_xmm(u8 id);
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bool is_xmm(u8 reg);
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u8 xmm_to_id(u8 reg);
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} // namespace goal
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#endif // JAK1_REGISTERS_H
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