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authorDoug Evans <dje@google.com>1998-02-12 00:11:47 +0000
committerDoug Evans <dje@google.com>1998-02-12 00:11:47 +0000
commit95effc2b253610365853d93c7b797b801e326f3d (patch)
tree2e4521fa829487e66c7d7855d6d50943b55714bd /gas
parentb4cbabb87983ed3668892902b9d488fc0d530633 (diff)
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update copyright date
Diffstat (limited to 'gas')
-rw-r--r--gas/cgen.c72
1 files changed, 66 insertions, 6 deletions
diff --git a/gas/cgen.c b/gas/cgen.c
index d65526d..7df4bef 100644
--- a/gas/cgen.c
+++ b/gas/cgen.c
@@ -1,5 +1,5 @@
/* 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.
@@ -73,7 +73,7 @@ cgen_asm_init_parse ()
/* Queue a fixup. */
-void
+static void
cgen_queue_fixup (opindex, opinfo, expP)
int opindex;
expressionS * expP;
@@ -87,6 +87,62 @@ cgen_queue_fixup (opindex, opinfo, expP)
++ 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.
This is a cover function to fix_new.
It exists because we record INSN with the fixup.
@@ -264,9 +320,11 @@ cgen_md_operand (expressionP)
/* Finish assembling instruction INSN.
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)
const CGEN_INSN * insn;
cgen_insn_t * buf;
@@ -280,7 +338,7 @@ cgen_asm_finish_insn (insn, buf, length)
/* ??? Target foo issues various warnings here, so one might want to provide
a hook here. However, our caller is defined in tc-foo.c so there
shouldn't be a need for a hook. */
-
+
/* Write out the instruction.
It is important to fetch enough space in one call to `frag_more'.
We use (f - frag_now->fr_literal) to compute where we are and we
@@ -330,7 +388,7 @@ cgen_asm_finish_insn (insn, buf, length)
/* Create a relaxable fragment for this instruction. */
old_frag = frag_now;
-
+
frag_var (rs_machine_dependent,
max_len - byte_len /* max chars */,
0 /* variable part already allocated */,
@@ -395,6 +453,8 @@ cgen_asm_finish_insn (insn, buf, length)
fixups[i].opinfo,
& fixups[i].exp);
}
+
+ return f;
}
/* Apply a fixup to the object code. This is called for all the