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[gas][arm] Set context table for '.arch_extension'

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This patch fixes .arch_extension behaviour.

Currently, context table for '.arch_extension' is only set while
"-march" processing, but it is not set while .arch processing,
so following code is rejected

  .syntax unified
  .thumb
  .arch armv8.1-m.main
  .arch_extension mve.fp

  unless -march=armv8.1-m.main is given.

Committing on behalf of Vladimir Murzin

gas/ChangeLog:
2019-12-10  Vladimir Murzin  <vladimir.murzin@arm.com>

	* config/tc-arm.c (s_arm_arch): Set selected_ctx_ext_table.
	* testsuite/gas/arm/mve-arch-ext.s: New.
	* testsuite/gas/arm/mve-arch-ext.d: New.
This commit is contained in:
Andre Vieira 2019-12-10 16:10:17 +00:00
parent 6c71eb7d70
commit 0e7aaa728d
4 changed files with 20 additions and 0 deletions
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6
gas/ChangeLog
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@ -1,3 +1,9 @@
2019-12-10 Vladimir Murzin <vladimir.murzin@arm.com>
* config/tc-arm.c (s_arm_arch): Set selected_ctx_ext_table.
* testsuite/gas/arm/mve-arch-ext.s: New.
* testsuite/gas/arm/mve-arch-ext.d: New.
2019-12-09 Jan Beulich <jbeulich@suse.com>
* config/tc-i386-intel.c (O_oword_ptr): Move.

1
gas/config/tc-arm.c
View file

@ -32633,6 +32633,7 @@ s_arm_arch (int ignored ATTRIBUTE_UNUSED)
if (streq (opt->name, name))
{
selected_arch = opt->value;
selected_ctx_ext_table = opt->ext_table;
selected_ext = arm_arch_none;
selected_cpu = selected_arch;
strcpy (selected_cpu_name, opt->name);

7
gas/testsuite/gas/arm/mve-arch-ext.d Normal file
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@ -0,0 +1,7 @@
# name: MVE context sensitive .arch_extension under no -march
# objdump: -dr --prefix-addresses --show-raw-insn -marmv8.1-m.main
.*: +file format .*arm.*
Disassembly of section .text:
0[0-9a-f]+ <[^>]+> ea52 136f asrl r2, r3, #5

6
gas/testsuite/gas/arm/mve-arch-ext.s Normal file
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@ -0,0 +1,6 @@
.syntax unified
.thumb
.arch armv8.1-m.main
.arch_extension mve
asrl r2, r3, #5