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/*
** Definitions for MIPS CPUs.
** Copyright (C) 2005-2012 Mike Pall. See Copyright Notice in luajit.h
*/
#ifndef _LJ_TARGET_MIPS_H
#define _LJ_TARGET_MIPS_H
/* -- Registers IDs ------------------------------------------------------- */
#define GPRDEF(_) \
_(R0) _(R1) _(R2) _(R3) _(R4) _(R5) _(R6) _(R7) \
_(R8) _(R9) _(R10) _(R11) _(R12) _(R13) _(R14) _(R15) \
_(R16) _(R17) _(R18) _(R19) _(R20) _(R21) _(R22) _(R23) \
_(R24) _(R25) _(SYS1) _(SYS2) _(GP) _(SP) _(R30) _(RA)
#define FPRDEF(_) \
_(F0) _(F1) _(F2) _(F3) _(F4) _(F5) _(F6) _(F7) \
_(F8) _(F9) _(F10) _(F11) _(F12) _(F13) _(F14) _(F15) \
_(F16) _(F17) _(F18) _(F19) _(F20) _(F21) _(F22) _(F23) \
_(F24) _(F25) _(F26) _(F27) _(F28) _(F29) _(F30) _(F31)
#define VRIDDEF(_)
#define RIDENUM(name) RID_##name,
enum {
GPRDEF(RIDENUM) /* General-purpose registers (GPRs). */
FPRDEF(RIDENUM) /* Floating-point registers (FPRs). */
RID_MAX,
RID_TMP = RID_RA,
/* Calling conventions. */
RID_RET = RID_R2,
#if LJ_LE
RID_RETHI = RID_R3,
RID_RETLO = RID_R2,
#else
RID_RETHI = RID_R2,
RID_RETLO = RID_R3,
#endif
RID_FPRET = RID_F0,
/* These definitions must match with the *.dasc file(s): */
RID_BASE = RID_R16, /* Interpreter BASE. */
RID_LPC = RID_R18, /* Interpreter PC. */
RID_DISPATCH = RID_R19, /* Interpreter DISPATCH table. */
RID_LREG = RID_R20, /* Interpreter L. */
RID_JGL = RID_R30, /* On-trace: global_State + 32768. */
/* Register ranges [min, max) and number of registers. */
RID_MIN_GPR = RID_R0,
RID_MAX_GPR = RID_RA+1,
RID_MIN_FPR = RID_F0,
RID_MAX_FPR = RID_F31+1,
RID_NUM_GPR = RID_MAX_GPR - RID_MIN_GPR,
RID_NUM_FPR = (RID_MAX_FPR - RID_MIN_FPR)/2
};
#define RID_NUM_KREF RID_NUM_GPR
#define RID_MIN_KREF RID_R0
/* -- Register sets ------------------------------------------------------- */
/* Make use of all registers, except TMP, SP, SYS1, SYS2 and JGL. */
#define RSET_FIXED \
(RID2RSET(RID_TMP)|RID2RSET(RID_SP)|RID2RSET(RID_SYS1)|\
RID2RSET(RID_SYS2)|RID2RSET(RID_JGL))
#define RSET_GPR (RSET_RANGE(RID_MIN_GPR, RID_MAX_GPR) - RSET_FIXED)
#define RSET_FPR \
(RID2RSET(RID_F0)|RID2RSET(RID_F2)|RID2RSET(RID_F4)|RID2RSET(RID_F6)|\
RID2RSET(RID_F8)|RID2RSET(RID_F10)|RID2RSET(RID_F12)|RID2RSET(RID_F14)|\
RID2RSET(RID_F16)|RID2RSET(RID_F18)|RID2RSET(RID_F20)|RID2RSET(RID_F22)|\
RID2RSET(RID_F24)|RID2RSET(RID_F26)|RID2RSET(RID_F28)|RID2RSET(RID_F30))
#define RSET_ALL (RSET_GPR|RSET_FPR)
#define RSET_INIT RSET_ALL
#define RSET_SCRATCH_GPR \
(RSET_RANGE(RID_R1, RID_R15+1)|\
RID2RSET(RID_R24)|RID2RSET(RID_R25)|RID2RSET(RID_GP)|RID2RSET(RID_RA))
#define RSET_SCRATCH_FPR \
(RID2RSET(RID_F0)|RID2RSET(RID_F2)|RID2RSET(RID_F4)|RID2RSET(RID_F6)|\
RID2RSET(RID_F8)|RID2RSET(RID_F10)|RID2RSET(RID_F12)|RID2RSET(RID_F14)|\
RID2RSET(RID_F16)|RID2RSET(RID_F18))
#define RSET_SCRATCH (RSET_SCRATCH_GPR|RSET_SCRATCH_FPR)
#define REGARG_FIRSTGPR RID_R4
#define REGARG_LASTGPR RID_R7
#define REGARG_NUMGPR 4
#define REGARG_FIRSTFPR RID_F12
#define REGARG_LASTFPR RID_F14
#define REGARG_NUMFPR 2
/* -- Spill slots --------------------------------------------------------- */
/* Spill slots are 32 bit wide. An even/odd pair is used for FPRs.
**
** SPS_FIXED: Available fixed spill slots in interpreter frame.
** This definition must match with the *.dasc file(s).
**
** SPS_FIRST: First spill slot for general use.
*/
#define SPS_FIXED 5
#define SPS_FIRST 4
#define sps_scale(slot) (4 * (int32_t)(slot))
#define sps_align(slot) (((slot) - SPS_FIXED + 1) & ~1)
/* -- Exit state ---------------------------------------------------------- */
/* This definition must match with the *.dasc file(s). */
typedef struct {
lua_Number fpr[RID_NUM_FPR]; /* Floating-point registers. */
int32_t gpr[RID_NUM_GPR]; /* General-purpose registers. */
int32_t spill[256]; /* Spill slots. */
} ExitState;
/* Highest exit + 1 indicates stack check. */
#define EXITSTATE_CHECKEXIT 1
#define EXITSTUB_SPACING 8
#define EXITSTUBS_PER_GROUP 16
/* -- Instructions -------------------------------------------------------- */
/* Instruction fields. */
#define MIPSF_S(r) ((r) << 21)
#define MIPSF_T(r) ((r) << 16)
#define MIPSF_D(r) ((r) << 11)
#define MIPSF_R(r) ((r) << 21)
#define MIPSF_H(r) ((r) << 16)
#define MIPSF_G(r) ((r) << 11)
#define MIPSF_F(r) ((r) << 6)
#define MIPSF_A(n) ((n) << 6)
#define MIPSF_M(n) ((n) << 11)
typedef enum MIPSIns {
/* Integer instructions. */
MIPSI_MOVE = 0x00000021,
MIPSI_NOP = 0x00000000,
MIPSI_LI = 0x24000000,
MIPSI_LU = 0x34000000,
MIPSI_LUI = 0x3c000000,
MIPSI_ORI = 0x34000000,
MIPSI_B = 0x10000000,
MIPSI_JR = 0x00000008,
/* Load/store instructions. */
MIPSI_LW = 0x8c000000,
MIPSI_SW = 0xac000000,
} MIPSIns;
#endif
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