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https://git.savannah.gnu.org/git/guile.git
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04b2d77354
* libguile/vm-engine.h (DEAD): New macro, nulls out a value. * libguile/vm-i-system.c: * libguile/vm-i-loader.c: * libguile/vm-i-scheme.c: Use DEAD when variables become dead. Later we can #ifdef this out, but I want to give the buildbots a try with this patch to make sure it's correct.
1838 lines
40 KiB
C
1838 lines
40 KiB
C
/* Copyright (C) 2001, 2008, 2009, 2010, 2011,
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* 2012 Free Software Foundation, Inc.
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Lesser General Public License
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* as published by the Free Software Foundation; either version 3 of
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* the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful, but
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* WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Lesser General Public License for more details.
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*
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* You should have received a copy of the GNU Lesser General Public
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* License along with this library; if not, write to the Free Software
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* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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* 02110-1301 USA
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*/
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/* This file is included in vm_engine.c */
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/* Compiler barrier, to prevent instruction reordering, apparently due
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to a bug in GCC 4.3.2 on sparc-linux-gnu and on hppa2.0-linux-gnu.
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See <http://bugs.gnu.org/10520>, for details. */
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#ifdef __GNUC__
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# define COMPILER_BARRIER __asm__ __volatile__ ("")
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#else
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# define COMPILER_BARRIER do { } while (0)
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#endif
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/*
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* Basic operations
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*/
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VM_DEFINE_INSTRUCTION (0, nop, "nop", 0, 0, 0)
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{
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (1, halt, "halt", 0, 0, 0)
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{
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nvalues = SCM_I_INUM (*sp--);
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NULLSTACK (1);
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if (nvalues == 1)
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POP (finish_args);
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else
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{
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POP_LIST (nvalues);
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POP (finish_args);
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SYNC_REGISTER ();
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finish_args = scm_values (finish_args);
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}
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{
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#ifdef VM_ENABLE_STACK_NULLING
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SCM *old_sp = sp;
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#endif
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/* Restore registers */
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sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1;
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/* Setting the ip here doesn't actually affect control flow, as the calling
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code will restore its own registers, but it does help when walking the
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stack */
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ip = SCM_FRAME_RETURN_ADDRESS (fp);
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fp = SCM_FRAME_DYNAMIC_LINK (fp);
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COMPILER_BARRIER;
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NULLSTACK (old_sp - sp);
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}
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goto vm_done;
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}
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VM_DEFINE_INSTRUCTION (2, drop, "drop", 0, 1, 0)
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{
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DROP ();
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (3, dup, "dup", 0, 0, 1)
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{
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SCM x = *sp;
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PUSH (x);
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DEAD (x);
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NEXT;
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}
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/*
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* Object creation
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*/
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VM_DEFINE_INSTRUCTION (4, void, "void", 0, 0, 1)
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{
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PUSH (SCM_UNSPECIFIED);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (5, make_true, "make-true", 0, 0, 1)
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{
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PUSH (SCM_BOOL_T);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (6, make_false, "make-false", 0, 0, 1)
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{
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PUSH (SCM_BOOL_F);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (7, make_nil, "make-nil", 0, 0, 1)
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{
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PUSH (SCM_ELISP_NIL);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (8, make_eol, "make-eol", 0, 0, 1)
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{
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PUSH (SCM_EOL);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (9, make_int8, "make-int8", 1, 0, 1)
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{
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PUSH (SCM_I_MAKINUM ((signed char) FETCH ()));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (10, make_int8_0, "make-int8:0", 0, 0, 1)
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{
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PUSH (SCM_INUM0);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (11, make_int8_1, "make-int8:1", 0, 0, 1)
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{
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PUSH (SCM_I_MAKINUM (1));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (12, make_int16, "make-int16", 2, 0, 1)
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{
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int h = FETCH ();
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int l = FETCH ();
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PUSH (SCM_I_MAKINUM ((signed short) (h << 8) + l));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (13, make_int64, "make-int64", 8, 0, 1)
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{
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scm_t_uint64 v = 0;
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v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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PUSH (scm_from_int64 ((scm_t_int64) v));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (14, make_uint64, "make-uint64", 8, 0, 1)
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{
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scm_t_uint64 v = 0;
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v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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PUSH (scm_from_uint64 (v));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (15, make_char8, "make-char8", 1, 0, 1)
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{
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scm_t_uint8 v = 0;
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v = FETCH ();
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PUSH (SCM_MAKE_CHAR (v));
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/* Don't simplify this to PUSH (SCM_MAKE_CHAR (FETCH ())). The
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contents of SCM_MAKE_CHAR may be evaluated more than once,
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resulting in a double fetch. */
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (16, make_char32, "make-char32", 4, 0, 1)
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{
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scm_t_wchar v = 0;
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v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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v <<= 8; v += FETCH ();
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PUSH (SCM_MAKE_CHAR (v));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (17, list, "list", 2, -1, 1)
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{
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unsigned h = FETCH ();
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unsigned l = FETCH ();
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unsigned len = ((h << 8) + l);
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POP_LIST (len);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (18, vector, "vector", 2, -1, 1)
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{
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unsigned h = FETCH ();
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unsigned l = FETCH ();
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unsigned len = ((h << 8) + l);
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SCM vect;
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SYNC_REGISTER ();
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sp++; sp -= len;
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CHECK_UNDERFLOW ();
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vect = scm_make_vector (scm_from_uint (len), SCM_BOOL_F);
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memcpy (SCM_I_VECTOR_WELTS(vect), sp, sizeof(SCM) * len);
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NULLSTACK (len);
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*sp = vect;
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DEAD (vect);
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NEXT;
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}
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/*
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* Variable access
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*/
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#define OBJECT_REF(i) objects[i]
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#define OBJECT_SET(i,o) objects[i] = o
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#define LOCAL_REF(i) SCM_FRAME_VARIABLE (fp, i)
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#define LOCAL_SET(i,o) SCM_FRAME_VARIABLE (fp, i) = o
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/* For the variable operations, we _must_ obviously avoid function calls to
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`scm_variable_ref ()', `scm_variable_bound_p ()' and friends which do
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nothing more than the corresponding macros. */
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#define VARIABLE_REF(v) SCM_VARIABLE_REF (v)
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#define VARIABLE_SET(v,o) SCM_VARIABLE_SET (v, o)
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#define VARIABLE_BOUNDP(v) (!scm_is_eq (VARIABLE_REF (v), SCM_UNDEFINED))
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#define FREE_VARIABLE_REF(i) SCM_PROGRAM_FREE_VARIABLE_REF (program, i)
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/* ref */
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VM_DEFINE_INSTRUCTION (19, object_ref, "object-ref", 1, 0, 1)
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{
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register unsigned objnum = FETCH ();
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CHECK_OBJECT (objnum);
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PUSH (OBJECT_REF (objnum));
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NEXT;
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}
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/* FIXME: necessary? elt 255 of the vector could be a vector... */
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VM_DEFINE_INSTRUCTION (20, long_object_ref, "long-object-ref", 2, 0, 1)
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{
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unsigned int objnum = FETCH ();
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objnum <<= 8;
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objnum += FETCH ();
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CHECK_OBJECT (objnum);
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PUSH (OBJECT_REF (objnum));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (21, local_ref, "local-ref", 1, 0, 1)
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{
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PUSH (LOCAL_REF (FETCH ()));
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ASSERT_BOUND (*sp);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (22, long_local_ref, "long-local-ref", 2, 0, 1)
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{
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unsigned int i = FETCH ();
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i <<= 8;
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i += FETCH ();
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PUSH (LOCAL_REF (i));
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ASSERT_BOUND (*sp);
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (23, local_bound, "local-bound?", 1, 0, 1)
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{
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PUSH (scm_from_bool (!scm_is_eq (LOCAL_REF (FETCH ()), SCM_UNDEFINED)));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (24, long_local_bound, "long-local-bound?", 2, 0, 1)
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{
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unsigned int i = FETCH ();
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i <<= 8;
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i += FETCH ();
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PUSH (scm_from_bool (!scm_is_eq (LOCAL_REF (i), SCM_UNDEFINED)));
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NEXT;
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}
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VM_DEFINE_INSTRUCTION (25, variable_ref, "variable-ref", 0, 1, 1)
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{
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SCM x = *sp;
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/* We don't use ASSERT_VARIABLE or ASSERT_BOUND_VARIABLE here because,
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unlike in top-variable-ref, it really isn't an internal assertion
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that can be optimized out -- the variable could be coming directly
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from the user. */
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if (SCM_UNLIKELY (!SCM_VARIABLEP (x)))
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{
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func_name = "variable-ref";
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finish_args = x;
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goto vm_error_not_a_variable;
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}
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else if (SCM_UNLIKELY (!VARIABLE_BOUNDP (x)))
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{
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SCM var_name;
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/* Attempt to provide the variable name in the error message. */
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var_name = scm_module_reverse_lookup (scm_current_module (), x);
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finish_args = scm_is_true (var_name) ? var_name : x;
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goto vm_error_unbound;
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||
}
|
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else
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||
{
|
||
SCM o = VARIABLE_REF (x);
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*sp = o;
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DEAD (o);
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}
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||
|
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NEXT;
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}
|
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|
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VM_DEFINE_INSTRUCTION (26, variable_bound, "variable-bound?", 0, 1, 1)
|
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{
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SCM x = *sp;
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if (SCM_UNLIKELY (!SCM_VARIABLEP (x)))
|
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{
|
||
func_name = "variable-bound?";
|
||
finish_args = x;
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||
goto vm_error_not_a_variable;
|
||
}
|
||
else
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||
*sp = scm_from_bool (VARIABLE_BOUNDP (x));
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DEAD (x);
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NEXT;
|
||
}
|
||
|
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VM_DEFINE_INSTRUCTION (27, toplevel_ref, "toplevel-ref", 1, 0, 1)
|
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{
|
||
unsigned objnum = FETCH ();
|
||
SCM what;
|
||
CHECK_OBJECT (objnum);
|
||
what = OBJECT_REF (objnum);
|
||
|
||
if (!SCM_VARIABLEP (what))
|
||
{
|
||
SCM resolved;
|
||
SYNC_REGISTER ();
|
||
resolved = resolve_variable (what, scm_program_module (program));
|
||
if (!VARIABLE_BOUNDP (resolved))
|
||
{
|
||
finish_args = what;
|
||
goto vm_error_unbound;
|
||
}
|
||
what = resolved;
|
||
DEAD (resolved);
|
||
OBJECT_SET (objnum, what);
|
||
}
|
||
|
||
PUSH (VARIABLE_REF (what));
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||
DEAD (what);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (28, long_toplevel_ref, "long-toplevel-ref", 2, 0, 1)
|
||
{
|
||
SCM what;
|
||
unsigned int objnum = FETCH ();
|
||
objnum <<= 8;
|
||
objnum += FETCH ();
|
||
CHECK_OBJECT (objnum);
|
||
what = OBJECT_REF (objnum);
|
||
|
||
if (!SCM_VARIABLEP (what))
|
||
{
|
||
SCM resolved;
|
||
SYNC_REGISTER ();
|
||
resolved = resolve_variable (what, scm_program_module (program));
|
||
if (!VARIABLE_BOUNDP (resolved))
|
||
{
|
||
finish_args = what;
|
||
goto vm_error_unbound;
|
||
}
|
||
what = resolved;
|
||
DEAD (resolved);
|
||
OBJECT_SET (objnum, what);
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||
}
|
||
|
||
PUSH (VARIABLE_REF (what));
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||
DEAD (what);
|
||
NEXT;
|
||
}
|
||
|
||
/* set */
|
||
|
||
VM_DEFINE_INSTRUCTION (29, local_set, "local-set", 1, 1, 0)
|
||
{
|
||
SCM x;
|
||
POP (x);
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||
LOCAL_SET (FETCH (), x);
|
||
DEAD (x);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (30, long_local_set, "long-local-set", 2, 1, 0)
|
||
{
|
||
SCM x;
|
||
unsigned int i = FETCH ();
|
||
i <<= 8;
|
||
i += FETCH ();
|
||
POP (x);
|
||
LOCAL_SET (i, x);
|
||
DEAD (x);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (31, variable_set, "variable-set", 0, 2, 0)
|
||
{
|
||
if (SCM_UNLIKELY (!SCM_VARIABLEP (sp[0])))
|
||
{
|
||
func_name = "variable-set!";
|
||
finish_args = sp[0];
|
||
goto vm_error_not_a_variable;
|
||
}
|
||
VARIABLE_SET (sp[0], sp[-1]);
|
||
DROPN (2);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (32, toplevel_set, "toplevel-set", 1, 1, 0)
|
||
{
|
||
unsigned objnum = FETCH ();
|
||
SCM what;
|
||
CHECK_OBJECT (objnum);
|
||
what = OBJECT_REF (objnum);
|
||
|
||
if (!SCM_VARIABLEP (what))
|
||
{
|
||
SYNC_BEFORE_GC ();
|
||
what = resolve_variable (what, scm_program_module (program));
|
||
OBJECT_SET (objnum, what);
|
||
}
|
||
|
||
VARIABLE_SET (what, *sp);
|
||
DEAD (what);
|
||
DROP ();
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (33, long_toplevel_set, "long-toplevel-set", 2, 1, 0)
|
||
{
|
||
SCM what;
|
||
unsigned int objnum = FETCH ();
|
||
objnum <<= 8;
|
||
objnum += FETCH ();
|
||
CHECK_OBJECT (objnum);
|
||
what = OBJECT_REF (objnum);
|
||
|
||
if (!SCM_VARIABLEP (what))
|
||
{
|
||
SYNC_BEFORE_GC ();
|
||
what = resolve_variable (what, scm_program_module (program));
|
||
OBJECT_SET (objnum, what);
|
||
}
|
||
|
||
VARIABLE_SET (what, *sp);
|
||
DEAD (what);
|
||
DROP ();
|
||
NEXT;
|
||
}
|
||
|
||
|
||
/*
|
||
* branch and jump
|
||
*/
|
||
|
||
/* offset must be at least 24 bits wide, and signed */
|
||
#define FETCH_OFFSET(offset) \
|
||
{ \
|
||
offset = FETCH () << 16; \
|
||
offset += FETCH () << 8; \
|
||
offset += FETCH (); \
|
||
offset -= (offset & (1<<23)) << 1; \
|
||
}
|
||
|
||
#define BR(p) \
|
||
{ \
|
||
scm_t_int32 offset; \
|
||
FETCH_OFFSET (offset); \
|
||
if (p) \
|
||
ip += offset; \
|
||
if (offset < 0) \
|
||
VM_HANDLE_INTERRUPTS; \
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (34, br, "br", 3, 0, 0)
|
||
{
|
||
scm_t_int32 offset;
|
||
FETCH_OFFSET (offset);
|
||
ip += offset;
|
||
if (offset < 0)
|
||
VM_HANDLE_INTERRUPTS;
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (35, br_if, "br-if", 3, 0, 0)
|
||
{
|
||
SCM x;
|
||
POP (x);
|
||
BR (scm_is_true (x));
|
||
DEAD (x);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (36, br_if_not, "br-if-not", 3, 0, 0)
|
||
{
|
||
SCM x;
|
||
POP (x);
|
||
BR (scm_is_false (x));
|
||
DEAD (x);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (37, br_if_eq, "br-if-eq", 3, 0, 0)
|
||
{
|
||
SCM x, y;
|
||
POP2 (y, x);
|
||
BR (scm_is_eq (x, y));
|
||
DEAD (x);
|
||
DEAD (y);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (38, br_if_not_eq, "br-if-not-eq", 3, 0, 0)
|
||
{
|
||
SCM x, y;
|
||
POP2 (y, x);
|
||
BR (!scm_is_eq (x, y));
|
||
DEAD (x);
|
||
DEAD (y);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (39, br_if_null, "br-if-null", 3, 0, 0)
|
||
{
|
||
SCM x;
|
||
POP (x);
|
||
BR (scm_is_null (x));
|
||
DEAD (x);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (40, br_if_not_null, "br-if-not-null", 3, 0, 0)
|
||
{
|
||
SCM x;
|
||
POP (x);
|
||
BR (!scm_is_null (x));
|
||
DEAD (x);
|
||
NEXT;
|
||
}
|
||
|
||
|
||
/*
|
||
* Subprogram call
|
||
*/
|
||
|
||
VM_DEFINE_INSTRUCTION (41, br_if_nargs_ne, "br-if-nargs-ne", 5, 0, 0)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
scm_t_int32 offset;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
FETCH_OFFSET (offset);
|
||
if (sp - (fp - 1) != n)
|
||
ip += offset;
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (42, br_if_nargs_lt, "br-if-nargs-lt", 5, 0, 0)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
scm_t_int32 offset;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
FETCH_OFFSET (offset);
|
||
if (sp - (fp - 1) < n)
|
||
ip += offset;
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (43, br_if_nargs_gt, "br-if-nargs-gt", 5, 0, 0)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
scm_t_int32 offset;
|
||
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
FETCH_OFFSET (offset);
|
||
if (sp - (fp - 1) > n)
|
||
ip += offset;
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (44, assert_nargs_ee, "assert-nargs-ee", 2, 0, 0)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
if (sp - (fp - 1) != n)
|
||
goto vm_error_wrong_num_args;
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (45, assert_nargs_ge, "assert-nargs-ge", 2, 0, 0)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
if (sp - (fp - 1) < n)
|
||
goto vm_error_wrong_num_args;
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (46, bind_optionals, "bind-optionals", 2, -1, -1)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
while (sp - (fp - 1) < n)
|
||
PUSH (SCM_UNDEFINED);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (47, bind_optionals_shuffle, "bind-optionals/shuffle", 6, -1, -1)
|
||
{
|
||
SCM *walk;
|
||
scm_t_ptrdiff nreq, nreq_and_opt, ntotal;
|
||
nreq = FETCH () << 8;
|
||
nreq += FETCH ();
|
||
nreq_and_opt = FETCH () << 8;
|
||
nreq_and_opt += FETCH ();
|
||
ntotal = FETCH () << 8;
|
||
ntotal += FETCH ();
|
||
|
||
/* look in optionals for first keyword or last positional */
|
||
/* starting after the last required positional arg */
|
||
walk = fp + nreq;
|
||
while (/* while we have args */
|
||
walk <= sp
|
||
/* and we still have positionals to fill */
|
||
&& walk - fp < nreq_and_opt
|
||
/* and we haven't reached a keyword yet */
|
||
&& !scm_is_keyword (*walk))
|
||
/* bind this optional arg (by leaving it in place) */
|
||
walk++;
|
||
/* now shuffle up, from walk to ntotal */
|
||
{
|
||
scm_t_ptrdiff nshuf = sp - walk + 1, i;
|
||
sp = (fp - 1) + ntotal + nshuf;
|
||
CHECK_OVERFLOW ();
|
||
for (i = 0; i < nshuf; i++)
|
||
sp[-i] = walk[nshuf-i-1];
|
||
}
|
||
/* and fill optionals & keyword args with SCM_UNDEFINED */
|
||
while (walk <= (fp - 1) + ntotal)
|
||
*walk++ = SCM_UNDEFINED;
|
||
|
||
NEXT;
|
||
}
|
||
|
||
/* Flags that determine whether other keywords are allowed, and whether a
|
||
rest argument is expected. These values must match those used by the
|
||
glil->assembly compiler. */
|
||
#define F_ALLOW_OTHER_KEYS 1
|
||
#define F_REST 2
|
||
|
||
VM_DEFINE_INSTRUCTION (48, bind_kwargs, "bind-kwargs", 5, 0, 0)
|
||
{
|
||
scm_t_uint16 idx;
|
||
scm_t_ptrdiff nkw;
|
||
int kw_and_rest_flags;
|
||
SCM kw;
|
||
idx = FETCH () << 8;
|
||
idx += FETCH ();
|
||
/* XXX: We don't actually use NKW. */
|
||
nkw = FETCH () << 8;
|
||
nkw += FETCH ();
|
||
kw_and_rest_flags = FETCH ();
|
||
|
||
if (!(kw_and_rest_flags & F_REST)
|
||
&& ((sp - (fp - 1) - nkw) % 2))
|
||
goto vm_error_kwargs_length_not_even;
|
||
|
||
CHECK_OBJECT (idx);
|
||
kw = OBJECT_REF (idx);
|
||
|
||
/* Switch NKW to be a negative index below SP. */
|
||
for (nkw = -(sp - (fp - 1) - nkw) + 1; nkw < 0; nkw++)
|
||
{
|
||
SCM walk;
|
||
|
||
if (scm_is_keyword (sp[nkw]))
|
||
{
|
||
for (walk = kw; scm_is_pair (walk); walk = SCM_CDR (walk))
|
||
{
|
||
if (scm_is_eq (SCM_CAAR (walk), sp[nkw]))
|
||
{
|
||
SCM si = SCM_CDAR (walk);
|
||
LOCAL_SET (SCM_I_INUMP (si) ? SCM_I_INUM (si) : scm_to_long (si),
|
||
sp[nkw + 1]);
|
||
break;
|
||
}
|
||
}
|
||
if (!(kw_and_rest_flags & F_ALLOW_OTHER_KEYS) && !scm_is_pair (walk))
|
||
goto vm_error_kwargs_unrecognized_keyword;
|
||
|
||
nkw++;
|
||
}
|
||
else if (!(kw_and_rest_flags & F_REST))
|
||
goto vm_error_kwargs_invalid_keyword;
|
||
}
|
||
|
||
DEAD (kw);
|
||
|
||
NEXT;
|
||
}
|
||
|
||
#undef F_ALLOW_OTHER_KEYS
|
||
#undef F_REST
|
||
|
||
|
||
VM_DEFINE_INSTRUCTION (49, push_rest, "push-rest", 2, -1, -1)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
SCM rest = SCM_EOL;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
while (sp - (fp - 1) > n)
|
||
/* No need to check for underflow. */
|
||
CONS (rest, *sp--, rest);
|
||
PUSH (rest);
|
||
DEAD (rest);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (50, bind_rest, "bind-rest", 4, -1, -1)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
scm_t_uint32 i;
|
||
SCM rest = SCM_EOL;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
i = FETCH () << 8;
|
||
i += FETCH ();
|
||
while (sp - (fp - 1) > n)
|
||
/* No need to check for underflow. */
|
||
CONS (rest, *sp--, rest);
|
||
LOCAL_SET (i, rest);
|
||
DEAD (rest);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (51, reserve_locals, "reserve-locals", 2, -1, -1)
|
||
{
|
||
SCM *old_sp;
|
||
scm_t_int32 n;
|
||
n = FETCH () << 8;
|
||
n += FETCH ();
|
||
old_sp = sp;
|
||
sp = (fp - 1) + n;
|
||
|
||
if (old_sp < sp)
|
||
{
|
||
CHECK_OVERFLOW ();
|
||
while (old_sp < sp)
|
||
*++old_sp = SCM_UNDEFINED;
|
||
}
|
||
else
|
||
NULLSTACK (old_sp - sp);
|
||
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (52, new_frame, "new-frame", 0, 0, 3)
|
||
{
|
||
/* NB: if you change this, see frames.c:vm-frame-num-locals */
|
||
/* and frames.h, vm-engine.c, etc of course */
|
||
|
||
/* We don't initialize the dynamic link here because we don't actually
|
||
know that this frame will point to the current fp: it could be
|
||
placed elsewhere on the stack if captured in a partial
|
||
continuation, and invoked from some other context. */
|
||
PUSH (SCM_PACK (0)); /* dynamic link */
|
||
PUSH (SCM_PACK (0)); /* mvra */
|
||
PUSH (SCM_PACK (0)); /* ra */
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (53, call, "call", 1, -1, 1)
|
||
{
|
||
nargs = FETCH ();
|
||
|
||
vm_call:
|
||
program = sp[-nargs];
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
|
||
if (SCM_UNLIKELY (!SCM_PROGRAM_P (program)))
|
||
{
|
||
if (SCM_STRUCTP (program) && SCM_STRUCT_APPLICABLE_P (program))
|
||
{
|
||
sp[-nargs] = SCM_STRUCT_PROCEDURE (program);
|
||
goto vm_call;
|
||
}
|
||
else if (SCM_NIMP (program) && SCM_TYP7 (program) == scm_tc7_smob
|
||
&& SCM_SMOB_APPLICABLE_P (program))
|
||
{
|
||
SYNC_REGISTER ();
|
||
sp[-nargs] = scm_i_smob_apply_trampoline (program);
|
||
goto vm_call;
|
||
}
|
||
else
|
||
goto vm_error_wrong_type_apply;
|
||
}
|
||
|
||
CACHE_PROGRAM ();
|
||
|
||
{
|
||
SCM *old_fp = fp;
|
||
|
||
fp = sp - nargs + 1;
|
||
|
||
ASSERT (SCM_FRAME_DYNAMIC_LINK (fp) == 0);
|
||
ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
|
||
ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
|
||
SCM_FRAME_SET_DYNAMIC_LINK (fp, old_fp);
|
||
SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
|
||
SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, 0);
|
||
}
|
||
|
||
ip = SCM_C_OBJCODE_BASE (bp);
|
||
PUSH_CONTINUATION_HOOK ();
|
||
APPLY_HOOK ();
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (54, tail_call, "tail-call", 1, -1, 1)
|
||
{
|
||
nargs = FETCH ();
|
||
|
||
vm_tail_call:
|
||
program = sp[-nargs];
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
|
||
if (SCM_UNLIKELY (!SCM_PROGRAM_P (program)))
|
||
{
|
||
if (SCM_STRUCTP (program) && SCM_STRUCT_APPLICABLE_P (program))
|
||
{
|
||
sp[-nargs] = SCM_STRUCT_PROCEDURE (program);
|
||
goto vm_tail_call;
|
||
}
|
||
else if (SCM_NIMP (program) && SCM_TYP7 (program) == scm_tc7_smob
|
||
&& SCM_SMOB_APPLICABLE_P (program))
|
||
{
|
||
SYNC_REGISTER ();
|
||
sp[-nargs] = scm_i_smob_apply_trampoline (program);
|
||
goto vm_tail_call;
|
||
}
|
||
else
|
||
goto vm_error_wrong_type_apply;
|
||
}
|
||
else
|
||
{
|
||
int i;
|
||
#ifdef VM_ENABLE_STACK_NULLING
|
||
SCM *old_sp = sp;
|
||
CHECK_STACK_LEAK ();
|
||
#endif
|
||
|
||
/* switch programs */
|
||
CACHE_PROGRAM ();
|
||
/* shuffle down the program and the arguments */
|
||
for (i = -1, sp = sp - nargs + 1; i < nargs; i++)
|
||
SCM_FRAME_STACK_ADDRESS (fp)[i] = sp[i];
|
||
|
||
sp = fp + i - 1;
|
||
|
||
NULLSTACK (old_sp - sp);
|
||
|
||
ip = SCM_C_OBJCODE_BASE (bp);
|
||
|
||
APPLY_HOOK ();
|
||
NEXT;
|
||
}
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (55, subr_call, "subr-call", 1, -1, -1)
|
||
{
|
||
SCM pointer, ret;
|
||
SCM (*subr)();
|
||
|
||
nargs = FETCH ();
|
||
POP (pointer);
|
||
|
||
subr = SCM_POINTER_VALUE (pointer);
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
SYNC_REGISTER ();
|
||
|
||
switch (nargs)
|
||
{
|
||
case 0:
|
||
ret = subr ();
|
||
break;
|
||
case 1:
|
||
ret = subr (sp[0]);
|
||
break;
|
||
case 2:
|
||
ret = subr (sp[-1], sp[0]);
|
||
break;
|
||
case 3:
|
||
ret = subr (sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 4:
|
||
ret = subr (sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 5:
|
||
ret = subr (sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 6:
|
||
ret = subr (sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 7:
|
||
ret = subr (sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 8:
|
||
ret = subr (sp[-7], sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 9:
|
||
ret = subr (sp[-8], sp[-7], sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
case 10:
|
||
ret = subr (sp[-9], sp[-8], sp[-7], sp[-6], sp[-5], sp[-4], sp[-3], sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
DEAD (pointer);
|
||
NULLSTACK_FOR_NONLOCAL_EXIT ();
|
||
|
||
if (SCM_UNLIKELY (SCM_VALUESP (ret)))
|
||
{
|
||
/* multiple values returned to continuation */
|
||
ret = scm_struct_ref (ret, SCM_INUM0);
|
||
nvalues = scm_ilength (ret);
|
||
PUSH_LIST (ret, scm_is_null);
|
||
DEAD (ret);
|
||
goto vm_return_values;
|
||
}
|
||
else
|
||
{
|
||
PUSH (ret);
|
||
DEAD (ret);
|
||
goto vm_return;
|
||
}
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (56, smob_call, "smob-call", 1, -1, -1)
|
||
{
|
||
SCM smob, ret;
|
||
SCM (*subr)();
|
||
nargs = FETCH ();
|
||
POP (smob);
|
||
|
||
subr = SCM_SMOB_DESCRIPTOR (smob).apply;
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
SYNC_REGISTER ();
|
||
|
||
switch (nargs)
|
||
{
|
||
case 0:
|
||
ret = subr (smob);
|
||
break;
|
||
case 1:
|
||
ret = subr (smob, sp[0]);
|
||
break;
|
||
case 2:
|
||
ret = subr (smob, sp[-1], sp[0]);
|
||
break;
|
||
case 3:
|
||
ret = subr (smob, sp[-2], sp[-1], sp[0]);
|
||
break;
|
||
default:
|
||
abort ();
|
||
}
|
||
|
||
DEAD (smob);
|
||
NULLSTACK_FOR_NONLOCAL_EXIT ();
|
||
|
||
if (SCM_UNLIKELY (SCM_VALUESP (ret)))
|
||
{
|
||
/* multiple values returned to continuation */
|
||
ret = scm_struct_ref (ret, SCM_INUM0);
|
||
nvalues = scm_ilength (ret);
|
||
PUSH_LIST (ret, scm_is_null);
|
||
DEAD (ret);
|
||
goto vm_return_values;
|
||
}
|
||
else
|
||
{
|
||
PUSH (ret);
|
||
DEAD (ret);
|
||
goto vm_return;
|
||
}
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (57, foreign_call, "foreign-call", 1, -1, -1)
|
||
{
|
||
SCM foreign, ret;
|
||
nargs = FETCH ();
|
||
POP (foreign);
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
SYNC_REGISTER ();
|
||
|
||
ret = scm_i_foreign_call (foreign, sp - nargs + 1);
|
||
|
||
DEAD (foreign);
|
||
NULLSTACK_FOR_NONLOCAL_EXIT ();
|
||
|
||
if (SCM_UNLIKELY (SCM_VALUESP (ret)))
|
||
{
|
||
/* multiple values returned to continuation */
|
||
ret = scm_struct_ref (ret, SCM_INUM0);
|
||
nvalues = scm_ilength (ret);
|
||
PUSH_LIST (ret, scm_is_null);
|
||
DEAD (ret);
|
||
goto vm_return_values;
|
||
}
|
||
else
|
||
{
|
||
PUSH (ret);
|
||
DEAD (ret);
|
||
goto vm_return;
|
||
}
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (58, continuation_call, "continuation-call", 0, -1, 0)
|
||
{
|
||
SCM contregs;
|
||
POP (contregs);
|
||
|
||
SYNC_ALL ();
|
||
scm_i_check_continuation (contregs);
|
||
vm_return_to_continuation (scm_i_contregs_vm (contregs),
|
||
scm_i_contregs_vm_cont (contregs),
|
||
sp - (fp - 1), fp);
|
||
scm_i_reinstate_continuation (contregs);
|
||
|
||
/* no DEAD, no NEXT */
|
||
abort ();
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (59, partial_cont_call, "partial-cont-call", 0, -1, 0)
|
||
{
|
||
SCM vmcont, intwinds, prevwinds;
|
||
POP2 (intwinds, vmcont);
|
||
SYNC_REGISTER ();
|
||
if (SCM_UNLIKELY (!SCM_VM_CONT_REWINDABLE_P (vmcont)))
|
||
{
|
||
finish_args = vmcont;
|
||
goto vm_error_continuation_not_rewindable;
|
||
}
|
||
prevwinds = scm_i_dynwinds ();
|
||
vm_reinstate_partial_continuation (vm, vmcont, intwinds, sp + 1 - fp, fp,
|
||
vm_cookie);
|
||
DEAD (vmcont);
|
||
DEAD (intwinds);
|
||
|
||
/* Rewind prompt jmpbuffers, if any. */
|
||
{
|
||
SCM winds = scm_i_dynwinds ();
|
||
for (; !scm_is_eq (winds, prevwinds); winds = scm_cdr (winds))
|
||
if (SCM_PROMPT_P (scm_car (winds)) && SCM_PROMPT_SETJMP (scm_car (winds)))
|
||
break;
|
||
DEAD (winds);
|
||
}
|
||
DEAD (prevwinds);
|
||
|
||
CACHE_REGISTER ();
|
||
program = SCM_FRAME_PROGRAM (fp);
|
||
CACHE_PROGRAM ();
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (60, tail_call_nargs, "tail-call/nargs", 0, 0, 1)
|
||
{
|
||
SCM x;
|
||
POP (x);
|
||
nargs = scm_to_int (x);
|
||
DEAD (x);
|
||
/* FIXME: should truncate values? */
|
||
goto vm_tail_call;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (61, call_nargs, "call/nargs", 0, 0, 1)
|
||
{
|
||
SCM x;
|
||
POP (x);
|
||
nargs = scm_to_int (x);
|
||
DEAD (x);
|
||
/* FIXME: should truncate values? */
|
||
goto vm_call;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (62, mv_call, "mv-call", 4, -1, 1)
|
||
{
|
||
scm_t_int32 offset;
|
||
scm_t_uint8 *mvra;
|
||
|
||
nargs = FETCH ();
|
||
FETCH_OFFSET (offset);
|
||
mvra = ip + offset;
|
||
|
||
vm_mv_call:
|
||
program = sp[-nargs];
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
|
||
if (SCM_UNLIKELY (!SCM_PROGRAM_P (program)))
|
||
{
|
||
if (SCM_STRUCTP (program) && SCM_STRUCT_APPLICABLE_P (program))
|
||
{
|
||
sp[-nargs] = SCM_STRUCT_PROCEDURE (program);
|
||
goto vm_mv_call;
|
||
}
|
||
else if (SCM_NIMP (program) && SCM_TYP7 (program) == scm_tc7_smob
|
||
&& SCM_SMOB_APPLICABLE_P (program))
|
||
{
|
||
SYNC_REGISTER ();
|
||
sp[-nargs] = scm_i_smob_apply_trampoline (program);
|
||
goto vm_mv_call;
|
||
}
|
||
else
|
||
goto vm_error_wrong_type_apply;
|
||
}
|
||
|
||
CACHE_PROGRAM ();
|
||
|
||
{
|
||
SCM *old_fp = fp;
|
||
|
||
fp = sp - nargs + 1;
|
||
|
||
ASSERT (SCM_FRAME_DYNAMIC_LINK (fp) == 0);
|
||
ASSERT (SCM_FRAME_RETURN_ADDRESS (fp) == 0);
|
||
ASSERT (SCM_FRAME_MV_RETURN_ADDRESS (fp) == 0);
|
||
SCM_FRAME_SET_DYNAMIC_LINK (fp, old_fp);
|
||
SCM_FRAME_SET_RETURN_ADDRESS (fp, ip);
|
||
SCM_FRAME_SET_MV_RETURN_ADDRESS (fp, mvra);
|
||
}
|
||
|
||
ip = SCM_C_OBJCODE_BASE (bp);
|
||
PUSH_CONTINUATION_HOOK ();
|
||
APPLY_HOOK ();
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (63, apply, "apply", 1, -1, 1)
|
||
{
|
||
int len;
|
||
SCM ls;
|
||
POP (ls);
|
||
|
||
nargs = FETCH ();
|
||
ASSERT (nargs >= 2);
|
||
|
||
len = scm_ilength (ls);
|
||
if (SCM_UNLIKELY (len < 0))
|
||
{
|
||
finish_args = ls;
|
||
goto vm_error_apply_to_non_list;
|
||
}
|
||
|
||
PUSH_LIST (ls, SCM_NULL_OR_NIL_P);
|
||
DEAD (ls);
|
||
|
||
nargs += len - 2;
|
||
goto vm_call;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (64, tail_apply, "tail-apply", 1, -1, 1)
|
||
{
|
||
int len;
|
||
SCM ls;
|
||
POP (ls);
|
||
|
||
nargs = FETCH ();
|
||
ASSERT (nargs >= 2);
|
||
|
||
len = scm_ilength (ls);
|
||
if (SCM_UNLIKELY (len < 0))
|
||
{
|
||
finish_args = ls;
|
||
goto vm_error_apply_to_non_list;
|
||
}
|
||
|
||
PUSH_LIST (ls, SCM_NULL_OR_NIL_P);
|
||
DEAD (ls);
|
||
|
||
nargs += len - 2;
|
||
goto vm_tail_call;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (65, call_cc, "call/cc", 0, 1, 1)
|
||
{
|
||
int first;
|
||
SCM proc, vm_cont, cont;
|
||
POP (proc);
|
||
SYNC_ALL ();
|
||
vm_cont = scm_i_vm_capture_stack (vp->stack_base, fp, sp, ip, NULL, 0);
|
||
cont = scm_i_make_continuation (&first, vm, vm_cont);
|
||
DEAD (vm_cont);
|
||
if (first)
|
||
{
|
||
PUSH (SCM_PACK (0)); /* dynamic link */
|
||
PUSH (SCM_PACK (0)); /* mvra */
|
||
PUSH (SCM_PACK (0)); /* ra */
|
||
PUSH (proc);
|
||
DEAD (proc);
|
||
PUSH (cont);
|
||
DEAD (cont);
|
||
nargs = 1;
|
||
goto vm_call;
|
||
}
|
||
else
|
||
{
|
||
/* Otherwise, the vm continuation was reinstated, and
|
||
vm_return_to_continuation pushed on one value. We know only one
|
||
value was returned because we are in value context -- the
|
||
previous block jumped to vm_call, not vm_mv_call, after all.
|
||
|
||
So, pull our regs back down from the vp, and march on to the
|
||
next instruction. */
|
||
DEAD (proc);
|
||
DEAD (cont);
|
||
CACHE_REGISTER ();
|
||
program = SCM_FRAME_PROGRAM (fp);
|
||
CACHE_PROGRAM ();
|
||
RESTORE_CONTINUATION_HOOK ();
|
||
NEXT;
|
||
}
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (66, tail_call_cc, "tail-call/cc", 0, 1, 1)
|
||
{
|
||
int first;
|
||
SCM proc, vm_cont, cont;
|
||
POP (proc);
|
||
SYNC_ALL ();
|
||
/* In contrast to call/cc, tail-call/cc captures the continuation without the
|
||
stack frame. */
|
||
vm_cont = scm_i_vm_capture_stack (vp->stack_base,
|
||
SCM_FRAME_DYNAMIC_LINK (fp),
|
||
SCM_FRAME_LOWER_ADDRESS (fp) - 1,
|
||
SCM_FRAME_RETURN_ADDRESS (fp),
|
||
SCM_FRAME_MV_RETURN_ADDRESS (fp),
|
||
0);
|
||
cont = scm_i_make_continuation (&first, vm, vm_cont);
|
||
DEAD (vm_cont);
|
||
if (first)
|
||
{
|
||
PUSH (proc);
|
||
DEAD (proc);
|
||
PUSH (cont);
|
||
DEAD (cont);
|
||
nargs = 1;
|
||
goto vm_tail_call;
|
||
}
|
||
else
|
||
{
|
||
DEAD (proc);
|
||
DEAD (cont);
|
||
/* Otherwise, cache regs and NEXT, as above. Invoking the continuation
|
||
does a return from the frame, either to the RA or
|
||
MVRA. */
|
||
CACHE_REGISTER ();
|
||
program = SCM_FRAME_PROGRAM (fp);
|
||
CACHE_PROGRAM ();
|
||
/* Unfortunately we don't know whether we are at the RA, and thus
|
||
have one value without an nvalues marker, or we are at the
|
||
MVRA and thus have multiple values and the nvalues
|
||
marker. Instead of adding heuristics here, we will let hook
|
||
client code do that. */
|
||
RESTORE_CONTINUATION_HOOK ();
|
||
NEXT;
|
||
}
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (67, return, "return", 0, 1, 1)
|
||
{
|
||
vm_return:
|
||
POP_CONTINUATION_HOOK (1);
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
|
||
{
|
||
SCM ret;
|
||
|
||
POP (ret);
|
||
|
||
#ifdef VM_ENABLE_STACK_NULLING
|
||
SCM *old_sp = sp;
|
||
#endif
|
||
|
||
/* Restore registers */
|
||
sp = SCM_FRAME_LOWER_ADDRESS (fp);
|
||
ip = SCM_FRAME_RETURN_ADDRESS (fp);
|
||
fp = SCM_FRAME_DYNAMIC_LINK (fp);
|
||
COMPILER_BARRIER;
|
||
|
||
#ifdef VM_ENABLE_STACK_NULLING
|
||
NULLSTACK (old_sp - sp);
|
||
#endif
|
||
|
||
/* Set return value (sp is already pushed) */
|
||
*sp = ret;
|
||
|
||
DEAD (ret);
|
||
}
|
||
|
||
/* Restore the last program */
|
||
program = SCM_FRAME_PROGRAM (fp);
|
||
CACHE_PROGRAM ();
|
||
CHECK_IP ();
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (68, return_values, "return/values", 1, -1, -1)
|
||
{
|
||
/* nvalues declared at top level, because for some reason gcc seems to think
|
||
that perhaps it might be used without declaration. Fooey to that, I say. */
|
||
nvalues = FETCH ();
|
||
vm_return_values:
|
||
POP_CONTINUATION_HOOK (nvalues);
|
||
|
||
VM_HANDLE_INTERRUPTS;
|
||
|
||
if (nvalues != 1 && SCM_FRAME_MV_RETURN_ADDRESS (fp))
|
||
{
|
||
/* A multiply-valued continuation */
|
||
SCM *vals = sp - nvalues;
|
||
int i;
|
||
/* Restore registers */
|
||
sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1;
|
||
ip = SCM_FRAME_MV_RETURN_ADDRESS (fp);
|
||
fp = SCM_FRAME_DYNAMIC_LINK (fp);
|
||
COMPILER_BARRIER;
|
||
|
||
/* Push return values, and the number of values */
|
||
for (i = 0; i < nvalues; i++)
|
||
*++sp = vals[i+1];
|
||
*++sp = SCM_I_MAKINUM (nvalues);
|
||
|
||
/* Finally null the end of the stack */
|
||
NULLSTACK (vals + nvalues - sp);
|
||
}
|
||
else if (nvalues >= 1)
|
||
{
|
||
/* Multiple values for a single-valued continuation -- here's where I
|
||
break with guile tradition and try and do something sensible. (Also,
|
||
this block handles the single-valued return to an mv
|
||
continuation.) */
|
||
SCM *vals = sp - nvalues;
|
||
/* Restore registers */
|
||
sp = SCM_FRAME_LOWER_ADDRESS (fp) - 1;
|
||
ip = SCM_FRAME_RETURN_ADDRESS (fp);
|
||
fp = SCM_FRAME_DYNAMIC_LINK (fp);
|
||
COMPILER_BARRIER;
|
||
|
||
/* Push first value */
|
||
*++sp = vals[1];
|
||
|
||
/* Finally null the end of the stack */
|
||
NULLSTACK (vals + nvalues - sp);
|
||
}
|
||
else
|
||
goto vm_error_no_values;
|
||
|
||
/* Restore the last program */
|
||
program = SCM_FRAME_PROGRAM (fp);
|
||
CACHE_PROGRAM ();
|
||
CHECK_IP ();
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (69, return_values_star, "return/values*", 1, -1, -1)
|
||
{
|
||
SCM l;
|
||
|
||
nvalues = FETCH ();
|
||
ASSERT (nvalues >= 1);
|
||
|
||
nvalues--;
|
||
POP (l);
|
||
while (scm_is_pair (l))
|
||
{
|
||
PUSH (SCM_CAR (l));
|
||
l = SCM_CDR (l);
|
||
nvalues++;
|
||
}
|
||
if (SCM_UNLIKELY (!SCM_NULL_OR_NIL_P (l))) {
|
||
finish_args = scm_list_1 (l);
|
||
goto vm_error_improper_list;
|
||
}
|
||
|
||
DEAD (l);
|
||
goto vm_return_values;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (70, return_nvalues, "return/nvalues", 0, 1, -1)
|
||
{
|
||
SCM n;
|
||
POP (n);
|
||
nvalues = scm_to_int (n);
|
||
DEAD (n);
|
||
ASSERT (nvalues >= 0);
|
||
goto vm_return_values;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (71, truncate_values, "truncate-values", 2, -1, -1)
|
||
{
|
||
SCM x;
|
||
int nbinds, rest;
|
||
POP (x);
|
||
nvalues = scm_to_int (x);
|
||
DEAD (x);
|
||
nbinds = FETCH ();
|
||
rest = FETCH ();
|
||
|
||
if (rest)
|
||
nbinds--;
|
||
|
||
if (nvalues < nbinds)
|
||
goto vm_error_not_enough_values;
|
||
|
||
if (rest)
|
||
POP_LIST (nvalues - nbinds);
|
||
else
|
||
DROPN (nvalues - nbinds);
|
||
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (72, box, "box", 1, 1, 0)
|
||
{
|
||
SCM val;
|
||
POP (val);
|
||
SYNC_BEFORE_GC ();
|
||
LOCAL_SET (FETCH (), scm_cell (scm_tc7_variable, SCM_UNPACK (val)));
|
||
DEAD (val);
|
||
NEXT;
|
||
}
|
||
|
||
/* for letrec:
|
||
(let ((a *undef*) (b *undef*) ...)
|
||
(set! a (lambda () (b ...)))
|
||
...)
|
||
*/
|
||
VM_DEFINE_INSTRUCTION (73, empty_box, "empty-box", 1, 0, 0)
|
||
{
|
||
SYNC_BEFORE_GC ();
|
||
LOCAL_SET (FETCH (),
|
||
scm_cell (scm_tc7_variable, SCM_UNPACK (SCM_UNDEFINED)));
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (74, local_boxed_ref, "local-boxed-ref", 1, 0, 1)
|
||
{
|
||
SCM v = LOCAL_REF (FETCH ());
|
||
ASSERT_BOUND_VARIABLE (v);
|
||
PUSH (VARIABLE_REF (v));
|
||
DEAD (v);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (75, local_boxed_set, "local-boxed-set", 1, 1, 0)
|
||
{
|
||
SCM v, val;
|
||
v = LOCAL_REF (FETCH ());
|
||
POP (val);
|
||
ASSERT_VARIABLE (v);
|
||
VARIABLE_SET (v, val);
|
||
DEAD (v);
|
||
DEAD (val);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (76, free_ref, "free-ref", 1, 0, 1)
|
||
{
|
||
scm_t_uint8 idx = FETCH ();
|
||
|
||
CHECK_FREE_VARIABLE (idx);
|
||
PUSH (FREE_VARIABLE_REF (idx));
|
||
NEXT;
|
||
}
|
||
|
||
/* no free-set -- if a var is assigned, it should be in a box */
|
||
|
||
VM_DEFINE_INSTRUCTION (77, free_boxed_ref, "free-boxed-ref", 1, 0, 1)
|
||
{
|
||
SCM v;
|
||
scm_t_uint8 idx = FETCH ();
|
||
CHECK_FREE_VARIABLE (idx);
|
||
v = FREE_VARIABLE_REF (idx);
|
||
ASSERT_BOUND_VARIABLE (v);
|
||
PUSH (VARIABLE_REF (v));
|
||
DEAD (v);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (78, free_boxed_set, "free-boxed-set", 1, 1, 0)
|
||
{
|
||
SCM v, val;
|
||
scm_t_uint8 idx = FETCH ();
|
||
POP (val);
|
||
CHECK_FREE_VARIABLE (idx);
|
||
v = FREE_VARIABLE_REF (idx);
|
||
ASSERT_BOUND_VARIABLE (v);
|
||
VARIABLE_SET (v, val);
|
||
DEAD (v);
|
||
DEAD (val);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (79, make_closure, "make-closure", 2, -1, 1)
|
||
{
|
||
size_t n, len;
|
||
SCM closure;
|
||
|
||
len = FETCH ();
|
||
len <<= 8;
|
||
len += FETCH ();
|
||
SYNC_BEFORE_GC ();
|
||
closure = scm_words (scm_tc7_program | (len<<16), len + 3);
|
||
SCM_SET_CELL_OBJECT_1 (closure, SCM_PROGRAM_OBJCODE (sp[-len]));
|
||
SCM_SET_CELL_OBJECT_2 (closure, SCM_PROGRAM_OBJTABLE (sp[-len]));
|
||
sp[-len] = closure;
|
||
for (n = 0; n < len; n++)
|
||
SCM_PROGRAM_FREE_VARIABLE_SET (closure, n, sp[-len + 1 + n]);
|
||
DEAD (closure);
|
||
DROPN (len);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (80, make_variable, "make-variable", 0, 0, 1)
|
||
{
|
||
SYNC_BEFORE_GC ();
|
||
/* fixme underflow */
|
||
PUSH (scm_cell (scm_tc7_variable, SCM_UNPACK (SCM_UNDEFINED)));
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (81, fix_closure, "fix-closure", 2, -1, 0)
|
||
{
|
||
SCM x;
|
||
unsigned int i = FETCH ();
|
||
size_t n, len;
|
||
i <<= 8;
|
||
i += FETCH ();
|
||
/* FIXME CHECK_LOCAL (i) */
|
||
x = LOCAL_REF (i);
|
||
/* FIXME ASSERT_PROGRAM (x); */
|
||
len = SCM_PROGRAM_NUM_FREE_VARIABLES (x);
|
||
for (n = 0; n < len; n++)
|
||
SCM_PROGRAM_FREE_VARIABLE_SET (x, n, sp[-len + 1 + n]);
|
||
DEAD (x);
|
||
DROPN (len);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (82, define, "define", 0, 0, 2)
|
||
{
|
||
SCM sym, val;
|
||
POP2 (sym, val);
|
||
SYNC_REGISTER ();
|
||
VARIABLE_SET (scm_sym2var (sym, scm_current_module_lookup_closure (),
|
||
SCM_BOOL_T),
|
||
val);
|
||
DEAD (sym);
|
||
DEAD (val);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (83, make_keyword, "make-keyword", 0, 1, 1)
|
||
{
|
||
CHECK_UNDERFLOW ();
|
||
SYNC_REGISTER ();
|
||
*sp = scm_symbol_to_keyword (*sp);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (84, make_symbol, "make-symbol", 0, 1, 1)
|
||
{
|
||
CHECK_UNDERFLOW ();
|
||
SYNC_REGISTER ();
|
||
*sp = scm_string_to_symbol (*sp);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (85, prompt, "prompt", 4, 2, 0)
|
||
{
|
||
scm_t_int32 offset;
|
||
scm_t_uint8 escape_only_p;
|
||
SCM k, prompt;
|
||
|
||
escape_only_p = FETCH ();
|
||
FETCH_OFFSET (offset);
|
||
POP (k);
|
||
|
||
SYNC_REGISTER ();
|
||
/* Push the prompt onto the dynamic stack. */
|
||
prompt = scm_c_make_prompt (k, fp, sp, ip + offset, escape_only_p, vm_cookie,
|
||
scm_i_dynwinds ());
|
||
scm_i_set_dynwinds (scm_cons (prompt, SCM_PROMPT_DYNWINDS (prompt)));
|
||
if (SCM_PROMPT_SETJMP (prompt))
|
||
{
|
||
/* The prompt exited nonlocally. Cache the regs back from the vp, and go
|
||
to the handler.
|
||
|
||
Note, at this point, we must assume that any variable local to
|
||
vm_engine that can be assigned *has* been assigned. So we need to pull
|
||
all our state back from the ip/fp/sp.
|
||
*/
|
||
DEAD (k);
|
||
DEAD (prompt);
|
||
CACHE_REGISTER ();
|
||
program = SCM_FRAME_PROGRAM (fp);
|
||
CACHE_PROGRAM ();
|
||
/* The stack contains the values returned to this prompt, along
|
||
with a number-of-values marker -- like an MV return. */
|
||
ABORT_CONTINUATION_HOOK ();
|
||
NEXT;
|
||
}
|
||
|
||
DEAD (k);
|
||
DEAD (prompt);
|
||
|
||
/* Otherwise setjmp returned for the first time, so we go to execute the
|
||
prompt's body. */
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (86, wind, "wind", 0, 2, 0)
|
||
{
|
||
SCM wind, unwind;
|
||
POP2 (unwind, wind);
|
||
SYNC_REGISTER ();
|
||
/* Push wind and unwind procedures onto the dynamic stack. Note that neither
|
||
are actually called; the compiler should emit calls to wind and unwind for
|
||
the normal dynamic-wind control flow. */
|
||
if (SCM_UNLIKELY (scm_is_false (scm_thunk_p (wind))))
|
||
{
|
||
finish_args = wind;
|
||
goto vm_error_not_a_thunk;
|
||
}
|
||
if (SCM_UNLIKELY (scm_is_false (scm_thunk_p (unwind))))
|
||
{
|
||
finish_args = unwind;
|
||
goto vm_error_not_a_thunk;
|
||
}
|
||
scm_i_set_dynwinds (scm_cons (scm_cons (wind, unwind), scm_i_dynwinds ()));
|
||
DEAD (wind);
|
||
DEAD (unwind);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (87, abort, "abort", 1, -1, -1)
|
||
{
|
||
unsigned n = FETCH ();
|
||
SYNC_REGISTER ();
|
||
if (sp - n - 2 <= SCM_FRAME_UPPER_ADDRESS (fp))
|
||
goto vm_error_stack_underflow;
|
||
vm_abort (vm, n, vm_cookie);
|
||
/* vm_abort should not return */
|
||
abort ();
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (88, unwind, "unwind", 0, 0, 0)
|
||
{
|
||
/* A normal exit from the dynamic extent of an expression. Pop the top entry
|
||
off of the dynamic stack. */
|
||
scm_i_set_dynwinds (scm_cdr (scm_i_dynwinds ()));
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (89, wind_fluids, "wind-fluids", 1, -1, 0)
|
||
{
|
||
unsigned n = FETCH ();
|
||
SCM wf;
|
||
|
||
SYNC_REGISTER ();
|
||
sp -= 2 * n;
|
||
CHECK_UNDERFLOW ();
|
||
wf = scm_i_make_with_fluids (n, sp + 1, sp + 1 + n);
|
||
NULLSTACK (2 * n);
|
||
|
||
scm_i_swap_with_fluids (wf, current_thread->dynamic_state);
|
||
scm_i_set_dynwinds (scm_cons (wf, scm_i_dynwinds ()));
|
||
DEAD (wf);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (90, unwind_fluids, "unwind-fluids", 0, 0, 0)
|
||
{
|
||
SCM wf;
|
||
wf = scm_car (scm_i_dynwinds ());
|
||
scm_i_set_dynwinds (scm_cdr (scm_i_dynwinds ()));
|
||
scm_i_swap_with_fluids (wf, current_thread->dynamic_state);
|
||
DEAD (wf);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (91, fluid_ref, "fluid-ref", 0, 1, 1)
|
||
{
|
||
size_t num;
|
||
SCM fluids;
|
||
|
||
CHECK_UNDERFLOW ();
|
||
fluids = SCM_I_DYNAMIC_STATE_FLUIDS (current_thread->dynamic_state);
|
||
if (SCM_UNLIKELY (!SCM_FLUID_P (*sp))
|
||
|| ((num = SCM_I_FLUID_NUM (*sp)) >= SCM_SIMPLE_VECTOR_LENGTH (fluids)))
|
||
{
|
||
/* Punt dynstate expansion and error handling to the C proc. */
|
||
DEAD (fluids);
|
||
SYNC_REGISTER ();
|
||
*sp = scm_fluid_ref (*sp);
|
||
}
|
||
else
|
||
{
|
||
SCM val = SCM_SIMPLE_VECTOR_REF (fluids, num);
|
||
DEAD (fluids);
|
||
if (scm_is_eq (val, SCM_UNDEFINED))
|
||
val = SCM_I_FLUID_DEFAULT (*sp);
|
||
if (SCM_UNLIKELY (scm_is_eq (val, SCM_UNDEFINED)))
|
||
{
|
||
finish_args = *sp;
|
||
goto vm_error_unbound_fluid;
|
||
}
|
||
*sp = val;
|
||
}
|
||
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (92, fluid_set, "fluid-set", 0, 2, 0)
|
||
{
|
||
size_t num;
|
||
SCM val, fluid, fluids;
|
||
|
||
POP2 (val, fluid);
|
||
fluids = SCM_I_DYNAMIC_STATE_FLUIDS (current_thread->dynamic_state);
|
||
if (SCM_UNLIKELY (!SCM_FLUID_P (fluid))
|
||
|| ((num = SCM_I_FLUID_NUM (fluid)) >= SCM_SIMPLE_VECTOR_LENGTH (fluids)))
|
||
{
|
||
/* Punt dynstate expansion and error handling to the C proc. */
|
||
SYNC_REGISTER ();
|
||
scm_fluid_set_x (fluid, val);
|
||
}
|
||
else
|
||
SCM_SIMPLE_VECTOR_SET (fluids, num, val);
|
||
DEAD (fluids);
|
||
DEAD (fluid);
|
||
DEAD (val);
|
||
NEXT;
|
||
}
|
||
|
||
VM_DEFINE_INSTRUCTION (93, assert_nargs_ee_locals, "assert-nargs-ee/locals", 1, 0, 0)
|
||
{
|
||
scm_t_ptrdiff n;
|
||
SCM *old_sp;
|
||
|
||
/* nargs = n & 0x7, nlocs = nargs + (n >> 3) */
|
||
n = FETCH ();
|
||
|
||
if (SCM_UNLIKELY (sp - (fp - 1) != (n & 0x7)))
|
||
goto vm_error_wrong_num_args;
|
||
|
||
old_sp = sp;
|
||
sp += (n >> 3);
|
||
CHECK_OVERFLOW ();
|
||
while (old_sp < sp)
|
||
*++old_sp = SCM_UNDEFINED;
|
||
|
||
NEXT;
|
||
}
|
||
|
||
#undef COMPILER_BARRIER
|
||
|
||
/*
|
||
(defun renumber-ops ()
|
||
"start from top of buffer and renumber 'VM_DEFINE_FOO (\n' sequences"
|
||
(interactive "")
|
||
(save-excursion
|
||
(let ((counter -1)) (goto-char (point-min))
|
||
(while (re-search-forward "^VM_DEFINE_[^ ]+ (\\([^,]+\\)," (point-max) t)
|
||
(replace-match
|
||
(number-to-string (setq counter (1+ counter)))
|
||
t t nil 1)))))
|
||
(renumber-ops)
|
||
*/
|
||
/*
|
||
Local Variables:
|
||
c-file-style: "gnu"
|
||
End:
|
||
*/
|