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author | Doug Evans <dje@google.com> | 1998-02-12 00:11:47 +0000 |
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committer | Doug Evans <dje@google.com> | 1998-02-12 00:11:47 +0000 |
commit | 95effc2b253610365853d93c7b797b801e326f3d (patch) | |
tree | 2e4521fa829487e66c7d7855d6d50943b55714bd /gas | |
parent | b4cbabb87983ed3668892902b9d488fc0d530633 (diff) | |
download | gdb-95effc2b253610365853d93c7b797b801e326f3d.zip gdb-95effc2b253610365853d93c7b797b801e326f3d.tar.gz gdb-95effc2b253610365853d93c7b797b801e326f3d.tar.bz2 |
update copyright date
Diffstat (limited to 'gas')
-rw-r--r-- | gas/cgen.c | 72 |
1 files changed, 66 insertions, 6 deletions
@@ -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 |