x86: Remove support for old (<= 2.8.1) versions of gcc
authorH.J. Lu <hjl.tools@gmail.com>
Thu, 8 Mar 2018 14:31:32 +0000 (06:31 -0800)
committerH.J. Lu <hjl.tools@gmail.com>
Thu, 8 Mar 2018 14:31:52 +0000 (06:31 -0800)
commitbd5dea8822e515faf305690ca5c5281132d95587
treec4b59a27cd8a3344dd7d95a5a88c18a60a0dc76b
parent4ef0bef68cfc777e59156fce1563583c0ffb76d9
x86: Remove support for old (<= 2.8.1) versions of gcc

Old (<= 2.8.1) versions of gcc generate broken fsubp, fsubrp, fdivp and
fdivrp instructions.  Assembler translates them to correct ones with a
warning:

[hjl@gnu-cfl-1 gas]$ cat x.s
fsubp %st(3),%st
[hjl@gnu-cfl-1 gas]$ gcc -c x.s
x.s: Assembler messages:
x.s:1: Warning: translating to `fsubp %st,%st(3)'
[hjl@gnu-cfl-1 gas]$

This patch removes support for old (<= 2.8.1) versions of gcc:

[hjl@gnu-cfl-1 gas]$ ./as-new -o x.o x.s
x.s: Assembler messages:
x.s:1: Error: operand type mismatch for `fsubp'
[hjl@gnu-cfl-1 gas]$

gas/

* NEWS: Mention -mold-gcc removal.
* config/tc-i386.c (i386_error): Remove old_gcc_only.
(old_gcc): Removed.
(match_template): Remove old gcc support.
(OPTION_MOLD_GCC): Removed.
(OPTION_MRELAX_RELOCATIONS): Updated.
(md_longopts): Remove OPTION_MOLD_GCC.
(md_parse_option): Likewise.
(md_show_usage): Remove -mold-gcc.
* testsuite/gas/i386/general.s: Convert fsub/fdiv tests for old
(<= 2.8.1) versions of gcc.
* testsuite/gas/i386/intel.s: Likewise.
* testsuite/gas/i386/general.l: Updated.
* testsuite/gas/i386/intel-intel.d: Likewise.
* testsuite/gas/i386/intel.d: Likewise.
* testsuite/gas/i386/intel.e: Likewise.
* testsuite/gas/i386/i386.exp: Don't pass -mold-gcc to general.

include/

* opcode/i386 (OLDGCC_COMPAT): Removed.

opcodes/

* i386-gen.c (opcode_modifiers): Remove OldGcc.
* i386-opc.h (OldGcc): Removed.
(i386_opcode_modifier): Remove oldgcc.
* i386-opc.tbl: Remove fsubp, fsubrp, fdivp and fdivrp
instructions for old (<= 2.8.1) versions of gcc.
* i386-tbl.h: Regenerated.
17 files changed:
gas/ChangeLog
gas/NEWS
gas/config/tc-i386.c
gas/testsuite/gas/i386/general.l
gas/testsuite/gas/i386/general.s
gas/testsuite/gas/i386/i386.exp
gas/testsuite/gas/i386/intel-intel.d
gas/testsuite/gas/i386/intel.d
gas/testsuite/gas/i386/intel.e
gas/testsuite/gas/i386/intel.s
include/ChangeLog
include/opcode/i386.h
opcodes/ChangeLog
opcodes/i386-gen.c
opcodes/i386-opc.h
opcodes/i386-opc.tbl
opcodes/i386-tbl.h