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https://git.savannah.gnu.org/git/guile.git
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366 lines
8.2 KiB
C
366 lines
8.2 KiB
C
/* Copyright (C) 2001 Free Software Foundation, Inc.
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2, or (at your option)
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* any later version.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this software; see the file COPYING. If not, write to
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* the Free Software Foundation, Inc., 59 Temple Place, Suite 330,
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* Boston, MA 02111-1307 USA
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*
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* As a special exception, the Free Software Foundation gives permission
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* for additional uses of the text contained in its release of GUILE.
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*
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* The exception is that, if you link the GUILE library with other files
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* to produce an executable, this does not by itself cause the
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* resulting executable to be covered by the GNU General Public License.
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* Your use of that executable is in no way restricted on account of
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* linking the GUILE library code into it.
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*
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* This exception does not however invalidate any other reasons why
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* the executable file might be covered by the GNU General Public License.
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*
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* This exception applies only to the code released by the
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* Free Software Foundation under the name GUILE. If you copy
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* code from other Free Software Foundation releases into a copy of
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* GUILE, as the General Public License permits, the exception does
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* not apply to the code that you add in this way. To avoid misleading
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* anyone as to the status of such modified files, you must delete
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* this exception notice from them.
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*
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* If you write modifications of your own for GUILE, it is your choice
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* whether to permit this exception to apply to your modifications.
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* If you do not wish that, delete this exception notice. */
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/* This file is included in vm_engine.c */
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/*
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* Options
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*/
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#define VM_USE_HOOKS 1 /* Various hooks */
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#define VM_USE_CLOCK 1 /* Bogoclock */
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#define VM_CHECK_EXTERNAL 1 /* Check external link */
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/*
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* Registers
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*/
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/* Register optimization. [ stolen from librep/src/lispmach.h,v 1.3 ]
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Some compilers underestimate the use of the local variables representing
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the abstract machine registers, and don't put them in hardware registers,
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which slows down the interpreter considerably.
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For GCC, I have hand-assigned hardware registers for several architectures.
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*/
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#ifdef __GNUC__
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#ifdef __mips__
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#define IP_REG asm("$16")
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#define SP_REG asm("$17")
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#define FP_REG asm("$18")
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#endif
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#ifdef __sparc__
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#define IP_REG asm("%l0")
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#define SP_REG asm("%l1")
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#define FP_REG asm("%l2")
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#endif
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#ifdef __alpha__
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#ifdef __CRAY__
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#define IP_REG asm("r9")
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#define SP_REG asm("r10")
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#define FP_REG asm("r11")
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#else
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#define IP_REG asm("$9")
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#define SP_REG asm("$10")
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#define FP_REG asm("$11")
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#endif
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#endif
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#ifdef __i386__
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#define IP_REG asm("%esi")
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#define SP_REG asm("%edi")
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#define FP_REG
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#endif
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#if defined(PPC) || defined(_POWER) || defined(_IBMR2)
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#define IP_REG asm("26")
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#define SP_REG asm("27")
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#define FP_REG asm("28")
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#endif
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#ifdef __hppa__
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#define IP_REG asm("%r18")
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#define SP_REG asm("%r17")
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#define FP_REG asm("%r16")
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#endif
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#ifdef __mc68000__
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#define IP_REG asm("a5")
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#define SP_REG asm("a4")
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#define FP_REG
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#endif
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#ifdef __arm__
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#define IP_REG asm("r9")
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#define SP_REG asm("r8")
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#define FP_REG asm("r7")
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#endif
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#endif
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/*
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* Cache/Sync
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*/
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#define CACHE_REGISTER() \
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{ \
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ip = vp->ip; \
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sp = vp->sp; \
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fp = vp->fp; \
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}
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#define SYNC_REGISTER() \
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{ \
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vp->ip = ip; \
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vp->sp = sp; \
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vp->fp = fp; \
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}
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#define CACHE_PROGRAM() \
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{ \
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bp = SCM_PROGRAM_DATA (program); \
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objects = SCM_VELTS (bp->objs); \
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}
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#define SYNC_BEFORE_GC() \
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{ \
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SYNC_REGISTER (); \
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}
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#define SYNC_ALL() \
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{ \
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SYNC_REGISTER (); \
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}
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/*
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* Error check
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*/
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#undef CHECK_EXTERNAL
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#if VM_CHECK_EXTERNAL
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#define CHECK_EXTERNAL(e) \
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do { if (!SCM_CONSP (e)) goto vm_error_external; } while (0)
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#else
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#define CHECK_EXTERNAL(e)
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#endif
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/*
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* Hooks
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*/
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#undef RUN_HOOK
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#if VM_USE_HOOKS
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#define RUN_HOOK(h) \
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{ \
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if (!SCM_FALSEP (vp->hooks[h])) \
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{ \
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SYNC_REGISTER (); \
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vm_heapify_frames (vm); \
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scm_c_run_hook (vp->hooks[h], hook_args); \
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CACHE_REGISTER (); \
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} \
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}
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#else
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#define RUN_HOOK(h)
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#endif
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#define BOOT_HOOK() RUN_HOOK (SCM_VM_BOOT_HOOK)
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#define HALT_HOOK() RUN_HOOK (SCM_VM_HALT_HOOK)
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#define NEXT_HOOK() RUN_HOOK (SCM_VM_NEXT_HOOK)
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#define ENTER_HOOK() RUN_HOOK (SCM_VM_ENTER_HOOK)
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#define APPLY_HOOK() RUN_HOOK (SCM_VM_APPLY_HOOK)
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#define EXIT_HOOK() RUN_HOOK (SCM_VM_EXIT_HOOK)
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#define RETURN_HOOK() RUN_HOOK (SCM_VM_RETURN_HOOK)
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/*
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* Stack operation
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*/
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#define CHECK_OVERFLOW() \
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if (sp > stack_limit) \
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goto vm_error_stack_overflow
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#define CHECK_UNDERFLOW() \
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if (sp < stack_base) \
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goto vm_error_stack_underflow
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#define PUSH(x) do { sp++; CHECK_OVERFLOW (); *sp = x; } while (0)
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#define DROP() do { CHECK_UNDERFLOW (); sp--; } while (0)
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#define POP(x) do { x = *sp; DROP (); } while (0)
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#define CONS(x,y,z) \
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{ \
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SCM cell; \
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SYNC_BEFORE_GC (); \
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SCM_NEWCELL (cell); \
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SCM_SET_CELL_OBJECT_0 (cell, y); \
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SCM_SET_CELL_OBJECT_1 (cell, z); \
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x = cell; \
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}
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#define POP_LIST(n) \
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do { \
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int i; \
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SCM l = SCM_EOL; \
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sp -= n; \
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for (i = n; i; i--) \
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CONS (l, sp[i], l); \
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PUSH (l); \
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} while (0)
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#define POP_LIST_MARK() \
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do { \
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SCM o; \
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SCM l = SCM_EOL; \
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POP (o); \
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while (!SCM_UNBNDP (o)) \
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{ \
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CONS (l, o, l); \
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POP (o); \
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} \
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PUSH (l); \
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} while (0)
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/*
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* Instruction operation
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*/
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#define FETCH() (*ip++)
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#define FETCH_LENGTH(len) do { ip = vm_fetch_length (ip, &len); } while (0)
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#undef CLOCK
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#if VM_USE_CLOCK
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#define CLOCK(n) vp->clock += n
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#else
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#define CLOCK(n)
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#endif
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#undef NEXT_JUMP
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#ifdef HAVE_LABELS_AS_VALUES
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#define NEXT_JUMP() goto *jump_table[FETCH ()]
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#else
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#define NEXT_JUMP() goto vm_start
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#endif
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#define NEXT \
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{ \
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CLOCK (1); \
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NEXT_HOOK (); \
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NEXT_JUMP (); \
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}
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/*
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* Stack frame
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*/
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#define INIT_ARGS() \
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{ \
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if (bp->nrest) \
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{ \
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int n = nargs - (bp->nargs - 1); \
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if (n < 0) \
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goto vm_error_wrong_num_args; \
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POP_LIST (n); \
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} \
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else \
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{ \
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if (nargs != bp->nargs) \
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goto vm_error_wrong_num_args; \
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} \
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}
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/* See frames.h for the layout of stack frames */
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#define NEW_FRAME() \
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{ \
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int i; \
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SCM ra = SCM_PACK (ip); \
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SCM dl = SCM_PACK (fp); \
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SCM *p = sp + 1; \
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SCM *q = p + bp->nlocs; \
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\
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/* New pointers */ \
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ip = bp->base; \
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fp = p - bp->nargs; \
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sp = q + 3; \
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CHECK_OVERFLOW (); \
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\
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/* Init local variables */ \
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for (; p < q; p++) \
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*p = SCM_UNDEFINED; \
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\
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/* Create external variables */ \
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external = bp->external; \
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for (i = 0; i < bp->nexts; i++) \
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CONS (external, SCM_UNDEFINED, external); \
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\
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/* Set frame data */ \
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p[3] = ra; \
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p[2] = dl; \
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p[1] = SCM_BOOL_F; \
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p[0] = external; \
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}
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#define FREE_FRAME() \
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{ \
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SCM *last_sp = sp; \
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SCM *last_fp = fp; \
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SCM *p = fp + bp->nargs + bp->nlocs; \
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\
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/* Restore pointers */ \
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ip = SCM_FRAME_BYTE_CAST (p[3]); \
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fp = SCM_FRAME_STACK_CAST (p[2]); \
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\
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if (!SCM_FALSEP (p[1])) \
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{ \
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/* Unlink the heap stack */ \
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vp->this_frame = p[1]; \
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} \
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else \
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{ \
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/* Move stack items */ \
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p += 4; \
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sp = SCM_FRAME_LOWER_ADDRESS (last_fp); \
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while (p <= last_sp) \
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*sp++ = *p++; \
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sp--; \
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} \
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}
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#define CACHE_EXTERNAL() external = fp[bp->nargs + bp->nlocs]
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/*
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* Function support
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*/
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#define ARGS1(a1) SCM a1 = sp[0];
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#define ARGS2(a1,a2) SCM a1 = sp[-1], a2 = sp[0]; sp--;
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#define ARGS3(a1,a2,a3) SCM a1 = sp[-2], a2 = sp[-1], a3 = sp[0]; sp -= 2;
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#define RETURN(x) do { *sp = x; NEXT; } while (0)
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/*
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Local Variables:
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c-file-style: "gnu"
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End:
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*/
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