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| author | Claudiu Zissulescu <claziss@synopsys.com> | 2016-02-10 12:09:01 +0000 |
|---|---|---|
| committer | Nick Clifton <nickc@redhat.com> | 2016-02-10 12:09:01 +0000 |
| commit | 4670103e86f59a80259fd593a6949d693382e536 (patch) | |
| tree | bc0ae65cc94a89c6fa81629a350abf6c9b243123 /gas/doc/c-arc.texi | |
| parent | 83da6e748c8f105f07e17f53aa6b99ed7867ff5f (diff) | |
| download | gdb-4670103e86f59a80259fd593a6949d693382e536.zip gdb-4670103e86f59a80259fd593a6949d693382e536.tar.gz gdb-4670103e86f59a80259fd593a6949d693382e536.tar.bz2 | |
Add support for ARC instruction relaxation in the assembler.
gas/
2016-01-26 Claudiu Zissulescu <claziss@synopsys.com>
Janek van Oirschot <jvanoirs@synopsys.com>
* config/tc-arc.h (TC_FRAG_TYPE, TC_PCREL_ADJUST, MAX_INSN_ARGS)
(MAX_INSN_FLGS, MAX_FLAG_NAME_LENGHT, TC_GENERIC_RELAX_TABLE):
Define.
(arc_flags, arc_relax_type): New structure.
* config/tc-arc.c (FRAG_MAX_GROWTH, RELAX_TABLE_ENTRY)
(RELAX_TABLE_ENTRY_MAX): New define.
(relaxation_state, md_relax_table, arc_relaxable_insns)
(arc_num_relaxable_ins): New variable.
(rlx_operand_type, arc_rlx_types): New enums.
(arc_relaxable_ins): New structure.
(OPTION_RELAX): New option.
(arc_insn): New relax member.
(arc_flags): Remove.
(relax_insn_p): New function.
(apply_fixups): Likewise.
(relaxable_operand): Likewise.
(may_relax_expr): Likewise.
(relaxable_flag): Likewise.
(arc_pcrel_adjust): Likewise.
(md_estimate_size_before_relax): Implement.
(md_convert_frag): Likewise.
(md_parse_option): Handle new mrelax option.
(md_show_usage): Likewise.
(assemble_insn): Set relax member.
(emit_insn0): New function.
(emit_insn1): Likewise.
(emit_insn): Handle relaxation case.
* NEWS: Mention the new relaxation option.
* doc/c-arc.texi (ARC Options): Document new mrelax option.
gas/testsuite
2016-01-26 Claudiu Zissulescu <claziss@synopsys.com>
* gas/arc/relax-avoid1.d: New file.
* gas/arc/relax-avoid1.s: Likewise.
* gas/arc/relax-avoid2.d: Likewise.
* gas/arc/relax-avoid2.s: Likewise.
* gas/arc/relax-avoid3.d: Likewise.
* gas/arc/relax-avoid3.s: Likewise.
* gas/arc/relax-b.d: Likewise.
* gas/arc/relax-b.s: Likewise.
include/opcode/
2016-01-26 Claudiu Zissulescu <claziss@synopsys.com>
Janek van Oirschot <jvanoirs@synopsys.com>
* arc.h (arc_opcode arc_relax_opcodes, arc_num_relax_opcodes):
Declare.
opcodes/
2016-01-26 Claudiu Zissulescu <claziss@synopsys.com>
Janek van Oirschot <jvanoirs@synopsys.com>
* arc-opc.c (arc_relax_opcodes, arc_num_relax_opcodes): New
variable.
Diffstat (limited to 'gas/doc/c-arc.texi')
| -rw-r--r-- | gas/doc/c-arc.texi | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/gas/doc/c-arc.texi b/gas/doc/c-arc.texi index 96abe83..4824027 100644 --- a/gas/doc/c-arc.texi +++ b/gas/doc/c-arc.texi @@ -85,6 +85,12 @@ default. This option turns on Code Density instructions. Only valid for ARC EM processors. +@cindex @code{-mrelax} command line option, ARC +@item -mrelax +Enable support for assembly-time relaxation. The assembler will +replace a longer version of an instruction with a shorter one, +whenever it is possible. + @end table @node ARC Syntax |