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This commit is contained in:
Doug Evans
1998-02-12 00:11:47 +00:00
parent b4cbabb879
commit 95effc2b25
1 changed files with 66 additions and 6 deletions
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68
gas/cgen.c
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@ -1,5 +1,5 @@
/* GAS interface for targets using CGEN: Cpu tools GENerator. /* GAS interface for targets using CGEN: Cpu tools GENerator.
Copyright (C) 1996, 1997 Free Software Foundation, Inc. Copyright (C) 1996, 1997, 1998 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler. This file is part of GAS, the GNU Assembler.
@ -73,7 +73,7 @@ cgen_asm_init_parse ()
/* Queue a fixup. */ /* Queue a fixup. */
void static void
cgen_queue_fixup (opindex, opinfo, expP) cgen_queue_fixup (opindex, opinfo, expP)
int opindex; int opindex;
expressionS * expP; expressionS * expP;
@ -87,6 +87,62 @@ cgen_queue_fixup (opindex, opinfo, expP)
++ num_fixups; ++ num_fixups;
} }
/* The following three functions allow a backup of the fixup chain to be made,
and to have this backup be swapped with the current chain. This allows
certain ports, eg the m32r, to swap two instructions and swap their fixups
at the same time. */
static struct fixup saved_fixups [MAX_FIXUPS];
static int saved_num_fixups;
void
cgen_save_fixups ()
{
saved_num_fixups = num_fixups;
memcpy (saved_fixups, fixups, sizeof (fixups[0]) * num_fixups);
num_fixups = 0;
}
void
cgen_restore_fixups ()
{
num_fixups = saved_num_fixups;
memcpy (fixups, saved_fixups, sizeof (fixups[0]) * num_fixups);
saved_num_fixups = 0;
}
void
cgen_swap_fixups ()
{
int tmp;
struct fixup tmp_fixup;
if (num_fixups == 0)
{
cgen_restore_fixups ();
}
else if (saved_num_fixups == 0)
{
cgen_save_fixups ();
}
else
{
tmp = saved_num_fixups;
saved_num_fixups = num_fixups;
num_fixups = tmp;
for (tmp = MAX_FIXUPS; tmp--;)
{
tmp_fixup = saved_fixups [tmp];
saved_fixups [tmp] = fixups [tmp];
fixups [tmp] = tmp_fixup;
}
}
}
/* Default routine to record a fixup. /* Default routine to record a fixup.
This is a cover function to fix_new. This is a cover function to fix_new.
It exists because we record INSN with the fixup. It exists because we record INSN with the fixup.
@ -264,9 +320,11 @@ cgen_md_operand (expressionP)
/* Finish assembling instruction INSN. /* Finish assembling instruction INSN.
BUF contains what we've built up so far. BUF contains what we've built up so far.
LENGTH is the size of the insn in bits. */ LENGTH is the size of the insn in bits.
Returns the address of the buffer containing the assembled instruction,
in case the caller needs to modify it for some reason. */
void char *
cgen_asm_finish_insn (insn, buf, length) cgen_asm_finish_insn (insn, buf, length)
const CGEN_INSN * insn; const CGEN_INSN * insn;
cgen_insn_t * buf; cgen_insn_t * buf;
@ -395,6 +453,8 @@ cgen_asm_finish_insn (insn, buf, length)
fixups[i].opinfo, fixups[i].opinfo,
& fixups[i].exp); & fixups[i].exp);
} }
return f;
} }
/* Apply a fixup to the object code. This is called for all the /* Apply a fixup to the object code. This is called for all the