/*
 * Copyright (C) 2012  Free Software Foundation, Inc.
 *
 * This is free software; you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as published by
 * the Free Software Foundation, either version 3 of the License, or
 * (at your option) any later version.
 *
 * This software is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 *
 * Authors:
 *	Paulo Cesar Pereira de Andrade
 */

#ifndef _jit_arm_h
#define _jit_arm_h

#define JIT_HASH_CONSTS		0
#define JIT_NUM_OPERANDS	3

/*
 * Types
 */
#define jit_swf_p()		(jit_cpu.vfp == 0)
#define jit_hardfp_p()		jit_cpu.abi

#define JIT_RET			_R0
#define JIT_SP			_R13
#define JIT_FP			_R11
typedef enum {
#define jit_arg_reg_p(i)	((i) >= 0 && (i) < 4)
#define jit_r(i)		(_R4 + (i))
#define jit_r_num()		3
#define jit_v(i)		(_R7 + (i))
#define jit_v_num()		3
#define jit_arg_f_reg_p(i)	((i) >= 0 && (i) < 4)
#define jit_f(i)		(jit_cpu.abi ? _D8 + (i) : _D7 + (i))
#define jit_f_num()		(jit_cpu.vfp ? 16 : 8)
    _R12,			/* ip - temporary */
#define JIT_R0			_R4
#define JIT_R1			_R5
#define JIT_R2			_R6
    _R4,			/* r4 - variable */
    _R5,			/* r5 - variable */
    _R6,			/* r6 - variable */
#define JIT_V0			_R7
#define JIT_V1			_R8
#define JIT_V2			_R9
    _R7,			/* r7 - variable */
    _R8,			/* r8 - variable */
    _R9,			/* r9 - variable */
    _R10,			/* sl - stack limit */
    _R11,			/* fp - frame pointer */
    _R13,			/* sp - stack pointer */
    _R14,			/* lr - link register */
    _R15,			/* pc - program counter */
#define JIT_RA0			_R0
#define JIT_RA1			_R1
#define JIT_RA2			_R2
#define JIT_RA3			_R3
    _R3,			/* r3 - argument/result */
    _R2,			/* r2 - argument/result */
    _R1,			/* r1 - argument/result */
    _R0,			/* r0 - argument/result */
#if defined(__ARM_PCS_VFP)
#  define JIT_FRET		_D0
#else
#  define JIT_FRET		_R0
#endif
#define JIT_F0			(jit_hardfp_p() ? _D8 : _D0)
#define JIT_F1			(jit_hardfp_p() ? _D9 : _D1)
#define JIT_F2			(jit_hardfp_p() ? _D10 : _D2)
#define JIT_F3			(jit_hardfp_p() ? _D11 : _D3)
#define JIT_F4			(jit_hardfp_p() ? _D12 : _D4)
#define JIT_F5			(jit_hardfp_p() ? _D13 : _D5)
#define JIT_F6			(jit_hardfp_p() ? _D14 : _D6)
#define JIT_F7			(jit_hardfp_p() ? _D15 : _D7)
    _S16,	_D8 = _S16,	_Q4 = _D8,
    _S17,
    _S18,	_D9 = _S18,
    _S19,
    _S20,	_D10 = _S20,	_Q5 = _D10,
    _S21,
    _S22,	_D11 = _S22,
    _S23,
    _S24,	_D12 = _S24,	_Q6 = _D12,
    _S25,
    _S26,	_D13 = _S26,
    _S27,
    _S28,	_D14 = _S28,	_Q7 = _D14,
    _S29,
    _S30,	_D15 = _S30,
    _S31,
#define JIT_FA0			_D0
#define JIT_FA1			_D1
#define JIT_FA2			_D2
#define JIT_FA3			_D3
#define JIT_FA4			_D4
#define JIT_FA5			_D5
#define JIT_FA6			_D6
#define JIT_FA7			_D7
    _S15,
    _S14,	_D7 = _S14,
    _S13,
    _S12,	_D6 = _S12,	_Q3 = _D6,
    _S11,
    _S10,	_D5 = _S10,
    _S9,
    _S8,	_D4 = _S8,	_Q2 = _D4,
    _S7,
    _S6,	_D3 = _S6,
    _S5,
    _S4,	_D2 = _S4,	_Q1 = _D2,
    _S3,
    _S2,	_D1 = _S2,
    _S1,
    _S0,	_D0 = _S0,	_Q0 = _D0,
    _NOREG,
#define JIT_NOREG		_NOREG
} jit_reg_t;

typedef struct {
    jit_uint32_t version	: 4;
    jit_uint32_t extend		: 1;
    /* only generate thumb instructions for thumb2 */
    jit_uint32_t thumb		: 1;
    jit_uint32_t vfp		: 3;
    jit_uint32_t neon		: 1;
    jit_uint32_t abi		: 2;
} jit_cpu_t;

typedef struct {
    /* prevent using thumb instructions that set flags? */
    jit_uint32_t no_set_flags	: 1;
} jit_flags_t;

typedef jit_int64_t		jit_regset_t;

/*
 * Initialization
 */
extern jit_cpu_t		jit_cpu;

#endif /* _jit_arm_h */