mcore-mcore-elf gas b[tf] problems in 000421

[Rodney Brown <rdb at localhost>]

binutils snapshots 000228 and 000421 configured as --target=mcore-mcore-elf
fail to assemble mcore 'bf' and 'bt' instructions as expected.
This shows up as failures running any of the execute gcc testsuite
tests.



$ head -30 newlib-1.8.2/libgloss/mcore/crt0.S 
// MCore StartUp Code.

	.import	main
	.import	exit

	.text
	.export	_start
_start:
	.export	_mainCRTStartup
_mainCRTStartup:
	// Initialise the stack pointer
	lrw	r1, _stack
	mov	r0, r1

	// Zero the .bss data space
	lrw     r1, __bss_start__
	lrw     r2, __bss_end__
	movi	r3, 0
.L0:	
	st	r3, (r1, 0)
	addi	r1, 4
	cmphs	r1, r2
	bf      .L0
#ifdef __ELF__
	// Call the global/static constructors
	jbsr    _init

	// Setup destructors to be called from exit,
	// just in case main never returns...
	lrw     r2, _fini
$ mcore-mcore-elf-run -t egcs-20000417.mcore/gcc/testsuite/20000112-1.x0
0028: inst = 710a LRW of 0x80000 from 0x50 to reg 1
002a: inst = 1210 MOV 80000 into reg 0
002c: inst = 710a LRW of 0x25e4 from 0x54 to reg 1
002e: inst = 720a LRW of 0x25e8 from 0x58 to reg 2
0030: inst = 6003 
0032: inst = 9301 store reg 3 (containing 0x0) to 0x25e4
0034: inst = 2031 
0036: inst = 0c21 
0038: inst = fc07 
PC loaded at 0x38 is outside of available memory! (0xfffff848)
program stopped with signal 11.
$ mcore-mcore-elf-objdump --disassemble \
egcs-20000417.mcore/gcc/testsuite/20000112-1.x0 | head -60

egcs-20000417.mcore/gcc/testsuite/20000112-1.x0:     file format elf32-mcore-little

Disassembly of section .init:

00000000 <_init>:
   0:	24f0      	subi	r0, 16
   2:	9f30      	st	r15, (r0, 12)
   4:	1200      	mov	r0, r0
   6:	1200      	mov	r0, r0
   8:	1200      	mov	r0, r0
   a:	1200      	mov	r0, r0
   c:	1200      	mov	r0, r0
   e:	1200      	mov	r0, r0
  10:	7f01      	jsri	0xE08	// e08 <__do_global_ctors_aux>
  12:	f200      	br	0x414
  14:	0e08      	tst	r8, r0
  16:	0000      	bkpt
  18:	0e0e      	tst	r14, r0
  1a:	0e0e      	tst	r14, r0
  1c:	0e0e      	tst	r14, r0
  1e:	0e0e      	tst	r14, r0
  20:	8f30      	ld	r15, (r0, 12)
  22:	20f0      	addi	r0, 16
  24:	00cf      	jmp	r15
Disassembly of section .text:

00000028 <_mainCRTStartup>:
  28:	710a      	lrw	r1, 0x80000
  2a:	1210      	mov	r0, r1
  2c:	710a      	lrw	r1, 0x25E4
  2e:	720a      	lrw	r2, 0x25E8
  30:	6003      	movi	r3, 0
  32:	9301      	st	r3, (r1, 0)
  34:	2031      	addi	r1, 4
  36:	0c21      	cmphs	r1, r2
  38:	fc07      	bsr	0xfffff848	// fffff848 <_stack+0xfff7f848>
  3a:	7f08      	jsri	0x0	// from address pool at 0x5c
  3c:	7209      	lrw	r2, 0xE30
  3e:	7f09      	jsri	0x2C4	// 2c4 <atexit>
  40:	6002      	movi	r2, 0
  42:	6003      	movi	r3, 0
  44:	6004      	movi	r4, 0
  46:	7f08      	jsri	0x26E	// 26e <__wrap_main>
  48:	6002      	movi	r2, 0
  4a:	7f08      	jsri	0x1C4	// 1c4 <__wrap_exit>
  4c:	0000      	bkpt
  4e:	0000      	bkpt
  50:	0000      	bkpt
  52:	0008      	trap	0
Broken pipe
$ cat ../junk.s
	.text
	.export _junk
_junk:
	st	r3, (r1, 0)
	addi	r1, 4
.L0:	
	cmphs	r1, r2
	bf	.L0
	bf	.L1
	bf	_junk
.L1:	
	bf	-2
	st	r3, (r1, 0)
	addi	r1, 4
.L2:	
	cmphs	r1, r2
	bt	.L2
	bt	.L3
	bt	_junk
.L3:	
	bt	-2
	bkpt
$ binutils-000421.mcore/gas/as-new --version
GNU assembler 000421
Copyright 1997 Free Software Foundation, Inc.
This program is free software; you may redistribute it under the terms of
the GNU General Public License.  This program has absolutely no warranty.
This assembler was configured for a target of `mcore-mcore-elf'.
$ binutils-000421.mcore/gas/as-new -o junk.o ../junk.s
$ binutils-000421.mcore/binutils/objdump --disassemble junk.o

junk.o:     file format elf32-mcore-little

Disassembly of section .text:

00000000 <_junk>:
   0:	9301      	st	r3, (r1, 0)
   2:	2031      	addi	r1, 4
   4:	0c21      	cmphs	r1, r2
   6:	fe07      	bsr	0xfffffc16	// fffffc16 <*ABS*+0xfffffc16>
   8:	e900      	bf	0x20a
   a:	fa07      	bsr	0x41a	// 41a <*ABS*+0x41a>
   c:	e800      	bf	0xe
   e:	9301      	st	r3, (r1, 0)
  10:	2031      	addi	r1, 4
  12:	0c21      	cmphs	r1, r2
  14:	fe07      	bsr	0xfffffc24	// fffffc24 <*ABS*+0xfffffc24>
  16:	e100      	bt	0x218
  18:	f307      	br	0x628
  1a:	e000      	bt	0x1c
	...