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/******************************** -*- C -*- ****************************
*
* Platform-independent layer (i386 version)
*
***********************************************************************/
/***********************************************************************
*
* Copyright 2000, 2001, 2002, 2003, 2006 Free Software Foundation, Inc.
* Written by Paolo Bonzini and Matthew Flatt.
*
* This file is part of GNU lightning.
*
* GNU lightning is free software; you can redistribute it and/or modify it
* under the terms of the GNU Lesser General Public License as published
* by the Free Software Foundation; either version 3, or (at your option)
* any later version.
*
* GNU lightning 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 Lesser General Public
* License for more details.
*
* You should have received a copy of the GNU Lesser General Public License
* along with GNU lightning; see the file COPYING.LESSER; if not, write to the
* Free Software Foundation, 59 Temple Place - Suite 330, Boston,
* MA 02111-1307, USA.
*
***********************************************************************/
#ifndef __lightning_core_h
#define __lightning_core_h
#define JIT_CAN_16 1
#define JIT_AP _EBP
#define JIT_R_NUM 3
#define JIT_R(i) (_EAX + (i))
#define JIT_V_NUM 3
#define JIT_V(i) ((i) == 0 ? _EBX : _ESI + (i) - 1)
struct jit_local_state {
int framesize;
int argssize;
int alloca_offset;
int alloca_slack;
jit_insn *finish_ref;
};
/* Whether a register is used for the user-accessible registers. */
#define jit_save(reg) 1
#define jit_base_prolog() (_jitl.framesize = 20, _jitl.alloca_offset = _jitl.alloca_slack = 0, _jitl.argssize = 0, \
PUSHLr(_EBX), PUSHLr(_ESI), PUSHLr(_EDI), PUSHLr(_EBP), MOVLrr(_ESP, _EBP))
#define jit_base_ret(ofs) \
(((ofs) < 0 ? LEAVE_() : POPLr(_EBP)), \
POPLr(_EDI), POPLr(_ESI), POPLr(_EBX), RET_())
/* Used internally. SLACK is used by the Darwin ABI which keeps the stack
aligned to 16-bytes. */
#define jit_allocai_internal(amount, slack) \
(((amount) < _jitl.alloca_slack \
? (void)0 \
: (void)(_jitl.alloca_slack += (amount) + (slack), \
((amount) + (slack) == sizeof (int) \
? PUSHLr(_EAX) \
: SUBLir((amount) + (slack), _ESP)))), \
_jitl.alloca_slack -= (amount), \
_jitl.alloca_offset -= (amount))
/* Stack */
#define jit_pushr_i(rs) PUSHLr(rs)
#define jit_popr_i(rs) POPLr(rs)
/* The += in argssize allows for stack pollution */
#ifdef __APPLE__
/* Stack must stay 16-byte aligned: */
# define jit_prepare_i(ni) (((ni & 0x3) \
? (void)SUBLir(4 * ((((ni) + 3) & ~(0x3)) - (ni)), JIT_SP) \
: (void)0), \
_jitl.argssize += (((ni) + 3) & ~(0x3)))
#define jit_allocai(n) \
jit_allocai_internal ((n), (_jitl.alloca_slack - (n)) & 15)
#define jit_prolog(n) (jit_base_prolog(), jit_subi_i (JIT_SP, JIT_SP, 12))
#define jit_ret() jit_base_ret (-12)
#else
# define jit_prepare_i(ni) (_jitl.argssize += (ni))
#define jit_allocai(n) \
jit_allocai_internal ((n), 0)
#define jit_prolog(n) jit_base_prolog()
#define jit_ret() jit_base_ret (_jitl.alloca_offset)
#endif
#define jit_bare_ret() RET_()
#define jit_calli(label) (CALLm( ((unsigned long) (label))), _jit.x.pc)
#define jit_callr(reg) CALLsr(reg)
#define jit_pusharg_i(rs) PUSHLr(rs)
#define jit_finish(sub) (_jitl.finish_ref = jit_calli((sub)), ADDLir(sizeof(long) * _jitl.argssize, JIT_SP), _jitl.argssize = 0, _jitl.finish_ref)
#define jit_finishr(reg) (jit_callr((reg)), ADDLir(sizeof(long) * _jitl.argssize, JIT_SP), _jitl.argssize = 0)
#define jit_arg_c() ((_jitl.framesize += sizeof(int)) - sizeof(int))
#define jit_arg_uc() ((_jitl.framesize += sizeof(int)) - sizeof(int))
#define jit_arg_s() ((_jitl.framesize += sizeof(int)) - sizeof(int))
#define jit_arg_us() ((_jitl.framesize += sizeof(int)) - sizeof(int))
#define jit_arg_i() ((_jitl.framesize += sizeof(int)) - sizeof(int))
#define jit_arg_ui() ((_jitl.framesize += sizeof(int)) - sizeof(int))
#define jit_arg_l() ((_jitl.framesize += sizeof(long)) - sizeof(long))
#define jit_arg_ul() ((_jitl.framesize += sizeof(long)) - sizeof(long))
#define jit_arg_p() ((_jitl.framesize += sizeof(long)) - sizeof(long))
#define jit_movi_p(d, is) (MOVLir (((long)(is)), (d)), _jit.x.pc)
#define jit_patch_long_at(jump_pc,v) (*_PSL((jump_pc) - sizeof(long)) = _jit_SL((jit_insn *)(v) - (jump_pc)))
#define jit_patch_at(jump_pc,v) jit_patch_long_at(jump_pc, v)
#define jit_patch_calli(jump_pc,v) jit_patch_long_at(jump_pc, v)
/* Memory */
#define jit_replace(s, rep, op) \
(jit_pushr_i(rep), \
MOVLrr((s), (rep)), \
op, jit_popr_i(rep))
#define jit_movbrm(rs, dd, db, di, ds) \
(jit_check8(rs) \
? MOVBrm(jit_reg8(rs), dd, db, di, ds) \
: jit_replace(rs, \
((dd != _EAX && db != _EAX && di != _EAX) ? _EAX : \
((dd != _ECX && db != _ECX && di != _ECX) ? _ECX : _EDX)), \
MOVBrm(((dd != _EAX && db != _EAX && di != _EAX) ? _AL : \
((dd != _ECX && db != _ECX && di != _ECX) ? _CL : _DL)), \
dd, db, di, ds)))
#define jit_ldr_c(d, rs) MOVSBLmr(0, (rs), 0, 0, (d))
#define jit_ldxr_c(d, s1, s2) MOVSBLmr(0, (s1), (s2), 1, (d))
#define jit_ldr_s(d, rs) MOVSWLmr(0, (rs), 0, 0, (d))
#define jit_ldxr_s(d, s1, s2) MOVSWLmr(0, (s1), (s2), 1, (d))
#define jit_ldi_c(d, is) MOVSBLmr((is), 0, 0, 0, (d))
#define jit_ldxi_c(d, rs, is) MOVSBLmr((is), (rs), 0, 0, (d))
#define jit_ldi_uc(d, is) MOVZBLmr((is), 0, 0, 0, (d))
#define jit_ldxi_uc(d, rs, is) MOVZBLmr((is), (rs), 0, 0, (d))
#define jit_sti_c(id, rs) jit_movbrm((rs), (id), 0, 0, 0)
#define jit_stxi_c(id, rd, rs) jit_movbrm((rs), (id), (rd), 0, 0)
#define jit_ldi_s(d, is) MOVSWLmr((is), 0, 0, 0, (d))
#define jit_ldxi_s(d, rs, is) MOVSWLmr((is), (rs), 0, 0, (d))
#define jit_ldi_us(d, is) MOVZWLmr((is), 0, 0, 0, (d))
#define jit_ldxi_us(d, rs, is) MOVZWLmr((is), (rs), 0, 0, (d))
#define jit_sti_s(id, rs) MOVWrm(jit_reg16(rs), (id), 0, 0, 0)
#define jit_stxi_s(id, rd, rs) MOVWrm(jit_reg16(rs), (id), (rd), 0, 0)
#define jit_ldi_i(d, is) MOVLmr((is), 0, 0, 0, (d))
#define jit_ldxi_i(d, rs, is) MOVLmr((is), (rs), 0, 0, (d))
#define jit_ldr_i(d, rs) MOVLmr(0, (rs), 0, 0, (d))
#define jit_ldxr_i(d, s1, s2) MOVLmr(0, (s1), (s2), 1, (d))
#define jit_sti_i(id, rs) MOVLrm((rs), (id), 0, 0, 0)
#define jit_stxi_i(id, rd, rs) MOVLrm((rs), (id), (rd), 0, 0)
#endif /* __lightning_core_h */
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