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2007-04-18 Paul Brook <paul@codesourcery.com>

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gas/testsuite/
	* gas/arm/thumb2_add.s: Add rsb #0 test.
	* gas/arm/thumb2_add.d: Update expected output.

	gas/
	* config/tc-arm.c (do_t_rsb): Use 16-bit encoding when possible.
This commit is contained in:
Paul Brook 2007-04-18 13:49:34 +00:00
parent 3d1f72c231
commit 026d3abbb2
5 changed files with 42 additions and 4 deletions
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4
gas/ChangeLog
View File

@ -1,3 +1,7 @@
2007-04-18 Paul Brook <paul@codesourcery.com>
* config/tc-arm.c (do_t_rsb): Use 16-bit encoding when possible.
2007-04-16 Kaz Kojima <kkojima@rr.iij4u.or.jp>
* config/tc-sh.c (sh_handle_align): Call as_bad_where instead

33
gas/config/tc-arm.c
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@ -9956,8 +9956,37 @@ do_t_rsb (void)
inst.instruction |= Rs << 16;
if (!inst.operands[2].isreg)
{
inst.instruction = (inst.instruction & 0xe1ffffff) | 0x10000000;
inst.reloc.type = BFD_RELOC_ARM_T32_IMMEDIATE;
bfd_boolean narrow;
if ((inst.instruction & 0x00100000) != 0)
narrow = (current_it_mask == 0);
else
narrow = (current_it_mask != 0);
if (Rd > 7 || Rs > 7)
narrow = FALSE;
if (inst.size_req == 4 || !unified_syntax)
narrow = FALSE;
if (inst.reloc.exp.X_op != O_constant
|| inst.reloc.exp.X_add_number != 0)
narrow = FALSE;
/* Turn rsb #0 into 16-bit neg. We should probably do this via
relaxation, but it doesn't seem worth the hassle. */
if (narrow)
{
inst.reloc.type = BFD_RELOC_UNUSED;
inst.instruction = THUMB_OP16 (T_MNEM_negs);
inst.instruction |= Rs << 3;
inst.instruction |= Rd;
}
else
{
inst.instruction = (inst.instruction & 0xe1ffffff) | 0x10000000;
inst.reloc.type = BFD_RELOC_ARM_T32_IMMEDIATE;
}
}
else
encode_thumb32_shifted_operand (2);

5
gas/testsuite/ChangeLog
View File

@ -1,3 +1,8 @@
2007-04-18 Paul Brook <paul@codesourcery.com>
* gas/arm/thumb2_add.s: Add rsb #0 test.
* gas/arm/thumb2_add.d: Update expected output.
2007-04-04 Paul Brook <paul@codesourcery.com>
* gas/arm/neon-cov.s: Add new vext test.

2
gas/testsuite/gas/arm/thumb2_add.d
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@ -27,4 +27,4 @@ Disassembly of section .text:
0+04c <[^>]+> a840 add r0, sp, #256
0+04e <[^>]+> f50d 6580 add.w r5, sp, #1024 ; 0x400
0+052 <[^>]+> f20d 1901 addw r9, sp, #257 ; 0x101
0+056 <[^>]+> bf00 nop
0+056 <[^>]+> 4271 negs r1, r6

2
gas/testsuite/gas/arm/thumb2_add.s
View File

@ -28,4 +28,4 @@ thumb2_add:
add r0, sp, #0x100
add r5, sp, #0x400
add r9, sp, #0x101
nop
rsbs r1, r6, #0