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5e5f37ed00
On x86, MAX_MEM_FOR_RS_ALIGN_CODE is 35, when the most common
alignment is 2**3 or 2**4, where the max memory required for the
alignment nops is 7 and 15 bytes respectively. So there is some
memory wasted since commit 83d94ae428. It's not a large amount,
especially considering that frag overhead on x86_46 is 144 bytes,
but even so I'd rather not be blamed for increasing gas memory usage.
So to reduce the memory we'd like to take the alignment into
consideration when initialising an rs_align_code frag. The only
difficulty here is start_bundle making an rs_align_code frag with an
alignment of zero initially, then later increasing the alignment. We
change that to use the bundle alignment when setting up the frag. I
think that is sufficient as bundle_align_p2 can't change in the middle
of a start_bundle/finish_bundle sequence.
I haven't modified any targets other than x86 in this patch. Most
won't benefit much due to using fairly small MAX_MEM_FOR_RS_ALIGN_CODE.
* read.c (start_bundle): Create rs_align_code frag with
bundle_align_p2 alignment, then set to zero alignment.
(finish_bundle): Adjust comment.
* frags.c (MAX_MEM_FOR_RS_ALIGN_CODE): Pass p2align and max
to macro.
* config/tc-i386.h (HANDLE_ALIGN): Assert that max_bytes is
sufficient for nop padding.
(max_mem_for_rs_align_code): New inline function.
(MAX_MEM_FOR_RS_ALIGN_CODE): Use it.
* config/tc-aarch64.h: Adjust MAX_MEM_FOR_RS_ALIGN_CODE.
* config/tc-alpha.h: Likewise.
* config/tc-arc.h: Likewise.
* config/tc-arm.h: Likewise.
* config/tc-epiphany.h: Likewise.
* config/tc-frv.h: Likewise.
* config/tc-ia64.h: Likewise.
* config/tc-kvx.h: Likewise.
* config/tc-loongarch.h: Likewise.
* config/tc-m32r.h: Likewise.
* config/tc-metag.h: Likewise.
* config/tc-mips.h: Likewise.
* config/tc-nds32.h: Likewise.
* config/tc-ppc.h: Likewise.
* config/tc-riscv.h: Likewise.
* config/tc-rl78.h: Likewise.
* config/tc-rx.h: Likewise.
* config/tc-score.h: Likewise.
* config/tc-sh.h: Likewise.
* config/tc-sparc.h: Likewise.
* config/tc-spu.h: Likewise.
* config/tc-tilegx.h: Likewise.
* config/tc-tilepro.h: Likewise.
* config/tc-visium.h: Likewise.
* config/tc-xtensa.h: Likewise.
79 lines
2.5 KiB
C
79 lines
2.5 KiB
C
/* tc-score.h -- Score specific file for assembler
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Copyright (C) 2006-2025 Free Software Foundation, Inc.
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Contributed by:
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Brain.lin (brain.lin@sunplusct.com)
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Mei Ligang (ligang@sunnorth.com.cn)
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Pei-Lin Tsai (pltsai@sunplus.com)
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This file is part of GAS, the GNU Assembler.
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GAS 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 3, or (at your option)
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any later version.
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GAS 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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You should have received a copy of the GNU General Public License
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along with GAS; see the file COPYING. If not, write to the Free
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Software Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
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MA 02110-1301, USA. */
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#ifndef TC_SCORE
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#define TC_SCORE
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#define TARGET_ARCH bfd_arch_score
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#define WORKING_DOT_WORD
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#define DIFF_EXPR_OK
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#define RELOC_EXPANSION_POSSIBLE
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#define MAX_RELOC_EXPANSION 2
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#define MAX_MEM_FOR_RS_ALIGN_CODE(p2align, max) (3 + 4)
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#define md_undefined_symbol(name) NULL
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#define TARGET_FORMAT (target_big_endian ? "elf32-bigscore" : "elf32-littlescore")
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#define md_relax_frag(segment, fragp, stretch) score_relax_frag (segment, fragp, stretch)
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extern int score_relax_frag (asection *, struct frag *, long);
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/* #define md_frag_check(fragp) score_frag_check (fragp) */
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extern void score_frag_check (fragS *);
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#define TC_VALIDATE_FIX(FIXP, SEGTYPE, SKIP) score_validate_fix (FIXP)
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extern void score_validate_fix (struct fix *);
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#define TC_FORCE_RELOCATION(FIXP) score_force_relocation (FIXP)
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extern int score_force_relocation (struct fix *);
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#define tc_fix_adjustable(fixp) score_fix_adjustable (fixp)
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extern bool score_fix_adjustable (struct fix *);
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#define elf_tc_final_processing score_elf_final_processing
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extern void score_elf_final_processing (void);
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struct score_tc_frag_data
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{
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unsigned int is_insn;
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struct fix *fixp;
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};
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#define TC_FRAG_TYPE struct score_tc_frag_data
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#define TC_FRAG_INIT(FRAGP, MAX_BYTES) \
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do \
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{ \
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(FRAGP)->tc_frag_data.is_insn = (((FRAGP)->fr_type == rs_machine_dependent) ? 1 : 0); \
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} \
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while (0)
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#ifdef OBJ_ELF
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#define GLOBAL_OFFSET_TABLE_NAME "_GLOBAL_OFFSET_TABLE_"
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#else
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#define GLOBAL_OFFSET_TABLE_NAME "__GLOBAL_OFFSET_TABLE_"
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#endif
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#endif /*TC_SCORE */
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