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Fixes for the encoding and decoding of the PDP11's SOB instruction

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This commit is contained in:
Nick Clifton
2004-10-01 11:19:38 +00:00
parent 99f5fc1b75
commit 14127cc4f2
6 changed files with 19 additions and 3 deletions
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5
gas/ChangeLog
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@ -1,3 +1,8 @@
2004-10-01 Bill Farmer <Bill@the-farmers.freeserve.co.uk>
* config/tc-pdp11.c (md_apply_fix3): Change to sign of the SOB
instruction's offset.
2004-10-01 Adam Nemet <anemet@lnxw.com> 2004-10-01 Adam Nemet <anemet@lnxw.com>
* (TARGET_FORMAT): Remove LynxOS COFF definition. * (TARGET_FORMAT): Remove LynxOS COFF definition.

3
gas/config/tc-pdp11.c
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@ -1,5 +1,5 @@
/* tc-pdp11.c - pdp11-specific - /* tc-pdp11.c - pdp11-specific -
Copyright 2001, 2002 Free Software Foundation, Inc. Copyright 2001, 2002, 2004 Free Software Foundation, Inc.
This file is part of GAS, the GNU Assembler. This file is part of GAS, the GNU Assembler.
@ -199,6 +199,7 @@ md_apply_fix3 (fixP, valP, seg)
case BFD_RELOC_PDP11_DISP_6_PCREL: case BFD_RELOC_PDP11_DISP_6_PCREL:
mask = 0x003f; mask = 0x003f;
shift = 1; shift = 1;
val = -val;
break; break;
default: default:
BAD_CASE (fixP->fx_r_type); BAD_CASE (fixP->fx_r_type);

4
gas/testsuite/ChangeLog
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@ -1,3 +1,7 @@
2004-10-01 Bill Farmer <Bill@the-farmers.freeserve.co.uk>
* gas/pdp11/opcode.d: Fix sob opcode value.
2004-09-30 Paul Brook <paul@codesourcery.com> 2004-09-30 Paul Brook <paul@codesourcery.com>
* gas/arm/arch6zk.d: New file. * gas/arm/arch6zk.d: New file.

2
gas/testsuite/gas/pdp11/opcode.d
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@ -134,7 +134,7 @@ Disassembly of section .text:
108: 7c7f [ ]*cvtlpi 108: 7c7f [ ]*cvtlpi
10a: 7d80 [ ]*med 10a: 7d80 [ ]*med
10c: 7dea [ ]*xfc 52 10c: 7dea [ ]*xfc 52
10e: 7e3e [ ]*sob r0, 10c <start2\+0x106> 10e: 7e02 [ ]*sob r0, 10c <start2\+0x106>
110: 80fd [ ]*bpl 10c <start2\+0x106> 110: 80fd [ ]*bpl 10c <start2\+0x106>
112: 81fc [ ]*bmi 10c <start2\+0x106> 112: 81fc [ ]*bmi 10c <start2\+0x106>
114: 82fb [ ]*bhi 10c <start2\+0x106> 114: 82fb [ ]*bhi 10c <start2\+0x106>

5
opcodes/ChangeLog
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@ -1,3 +1,8 @@
2004-10-01 Bill Farmer <Bill@the-farmers.freeserve.co.uk>
* pdp11-dis.c (print_insn_pdp11): Subtract the SOB's displacement
rather than add it.
2004-09-30 Paul Brook <paul@codesourcery.com> 2004-09-30 Paul Brook <paul@codesourcery.com>
* arm-dis.c (print_insn_arm): Handle 'e' for SMI instruction. * arm-dis.c (print_insn_arm): Handle 'e' for SMI instruction.

3
opcodes/pdp11-dis.c
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@ -342,7 +342,8 @@ print_insn_pdp11 (memaddr, info)
case PDP11_OPCODE_REG_DISPL: case PDP11_OPCODE_REG_DISPL:
{ {
int displ = (opcode & 0x3f) << 10; int displ = (opcode & 0x3f) << 10;
bfd_vma address = memaddr + (sign_extend (displ) >> 9); bfd_vma address = memaddr - (displ >> 9);
FPRINTF (F, OP.name); FPRINTF (F, OP.name);
FPRINTF (F, AFTER_INSTRUCTION); FPRINTF (F, AFTER_INSTRUCTION);
print_reg (src, info); print_reg (src, info);