[deliverable/binutils-gdb.git] / gas / ChangeLog

2008-04-04  Adrian Bunk  <bunk@stusta.de>
	    Bob Wilson  <bob.wilson@acm.org>
	
	* config/tc-xtensa.c (xg_apply_fix_value): Check return code from
	call to decode_reloc.
	
2008-04-04  H.J. Lu  <hongjiu.lu@intel.com>

	* NEWS: Mention XSAVE.  Change CLMUL to PCLMUL.

	* config/tc-i386.c (cpu_arch): Add .pclmul.
	(md_show_usage): Replace clmul with pclmul.
	* doc/c-i386.texi: Likewise.

2008-04-03  H.J. Lu  <hongjiu.lu@intel.com>

	* NEWS: Mention AES, CLMUL, AVX/FMA and -msse2avx.

	* doc/c-i386.texi: Add avx, aes, clmul and fma to -march=.
	Document -msse2avx, .avx, .aes, .clmul and .fma.

	* config/tc-i386.c (YMMWORD_MNEM_SUFFIX): New.
	(vex_prefix): Likewise.
	(sse2avx): Likewise.
	(CPU_FLAGS_ARCH_MATCH): Likewise.
	(CPU_FLAGS_64BIT_MATCH): Likewise.
	(CPU_FLAGS_32BIT_MATCH): Likewise.
	(CPU_FLAGS_PERFECT_MATCH): Likewise.
	(regymm): Likewise.
	(vex_imm4): Likewise.
	(fits_in_imm4): Likewise.
	(build_vex_prefix): Likewise.
	(VEX_check_operands): Likewise.
	(bad_implicit_operand): Likewise.
	(OPTION_MSSE2AVX): Likewise.
	(T_YMMWORD): Likewise.
	(_i386_insn): Add vex.
	(cpu_arch): Add .avx, .aes, .clmul and .fma.
	(cpu_flags_match): Changed to take a pointer to const template.
	Enable encoding SSE instructions with VEX prefix for -msse2avx.
	(match_mem_size): Also check ymmword.
	(operand_type_match): Clear ymmword.
	(md_begin): Allow '_' in mnemonic.
	(type_names): Add OPERAND_TYPE_VEX_IMM4.
	(process_immext): Update assert.
	(md_assemble): Don't call process_immext if sse2avx and immext
	are true.  Call build_vex_prefix if vex is true.
	(parse_insn): Updated for cpu_flags_match.
	(swap_operands): Handle 5 operands.
	(match_template): Handle 5 operands. Updated for cpu_flags_match.
	Check regymm.  Call VEX_check_operands. Handle YMMWORD_MNEM_SUFFIX.
	(process_suffix): Handle YMMWORD_MNEM_SUFFIX.
	(check_byte_reg): Check regymm.
	(process_operands): Duplicate the destination register for
	-msse2avx if needed.
	(build_modrm_byte): Updated for instructions with VEX encoding.
	(output_insn): Output VEX prefix if needed.
	(md_longopts): Add msse2avx.
	(md_parse_option): Handle OPTION_MSSE2AVX.
	(md_show_usage): Add avx, aes, clmul, fma and -msse2avx.
	(intel_e09): Support YMMWORD.
	(intel_e11): Likewise.
	(intel_get_token): Likewise.

2008-03-28  Eric B. Weddington  <eric.weddington@atmel.com>

	* config/tc-avr.c (mcu_types): Add attiny167.
	* doc/c-avr.texi: Likewise.

2008-03-28  Eric B. Weddington  <eric.weddington@atmel.com>

	* config/tc-avr.c (mcu_types): Add atmega32u4.
	* doc/c-avr.texi: Likewise.

2008-03-28  Eric B. Weddington  <eric.weddington@atmel.com>

	* config/tc-avr.c (mcu_types): Add atmega32c1.
	* doc/c-avr.texi: Likewise.

2008-03-28  Paul Brook  <paul@codesourcery.com>

	* config/tc-arm.c (parse_neon_mov): Parse register before immediate
	to avoid spurious symbols.

2008-03-28  Nathan Sidwell  <nathan@codesourcery.com>

	* config/tc-m68k.c (md_convert_frag_1): Replace as_fatal with
	as_bad_where.

2008-03-27  Eric B. Weddington  <eric.weddington@atmel.com>

	* config/tc-avr.c (mcu_types): Add atmega32m1.
	* doc/c-avr.texi: Likewise.

2008-03-27  Ineiev  <ineiev@yahoo.co.uk>

	* config/tc-arm.c (do_neon_cvt): Move variable declarations to
	start of block.
	(do_neon_ext): Fix sign of comparison.

2008-03-26  Bernd Schmidt  <bernd.schmidt@analog.com>

	From Jie Zhang  <jie.zhang@analog.com>
	* config/bfin-parse.y (asm_1): Check AREGS in comparison
	instructions. And call yyerror when comparing PREG with
	DREG.
	(check_macfunc_option): New.
	(check_macfuncs): Check option by calling check_macfunc_option.
	Fix comparison always true warnings.  Both scalar instructions
	of vector instruction must share the same mode option.  Only allow
	option mode at the end of the second instruction of the vector.
	(asm_1): Check option by calling check_macfunc_option.

	* config/bfin-parse.y (check_macfunc_option): Allow (IU)
	option for multiply and multiply-accumulate to data register
	instruction.
	(check_macfuncs): Don't check if accumulator matches the data register
	here.
	(assign_macfunc): Check if accumulator matches the
	data register in each rule that moves to the data
	register.

	* config/tc-bfin.c (bfin_start_line_hook): Localize the labels
	generated for LOOP_BEGIN and LOOP_END instructions.
	(bfin_gen_loop): Likewise. 

2008-03-19  Andreas Krebbel  <krebbel1@de.ibm.com>

	* config/tc-s390.c (md_parse_option): z10 option added.

2008-03-17  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* aclocal.m4: Regenerate.
	* configure: Likewise.
	* Makefile.in: Likewise.
	* doc/Makefile.in: Likewise.

2008-03-17  Adrian Bunk  <bunk@stusta.de>

	PR 5946
	* config/tc-hppa.c (is_same_frag): Delete.

2008-03-14  Sterling Augustine  <sterling@tensilica.com>
	
	* config/tc-xtensa.h (xtensa_relax_statesE): Update comment for
	RELAX_LOOP_END_ADD_NOP.
	
2008-03-13  Evandro Menezes  <evandro@yahoo.com>

	PR gas/5895
	* read.c (s_mexit): Warn if attempting to exit a macro when not
	inside a macro definition.

2008-03-13  Alan Modra  <amodra@bigpond.net.au>

	* Makefile.am: Run "make dep-am".
	* Makefile.in: Regenerate.
	* configure: Regenerate.

2008-03-09  Paul Brook  <paul@codesourcery.com>

	* config/tc-arm.c (arm_cpu_option_table): Add cortex-a9.
	* doc/c-arm.texi: Add cortex-a9.

2008-03-09  Paul Brook  <paul@codesourcery.com>

	* config/tc-arm.c (fpu_vfp_ext_d32): New vairable.
	(parse_vfp_reg_list, encode_arm_vfp_reg): Use it.
	(arm_option_cpu_value): Add vfpv3-d16, vfpv2 and vfpv3.
	(aeabi_set_public_attributes): Handle Tag_VFP_arch=VFPV3-D16.
	* doc/c-arm.texi: Document new ARM FPU variants.

2008-03-07  Paul Brook  <paul@codesourcery.com>

	* config/tc-arm.c (md_apply_fix): Use correct offset range.

2008-03-07  Alan Modra  <amodra@bigpond.net.au>

	* config/tc-ppc.c (ppc_setup_opcodes): Tidy.  Add code to test
	for strict ordering of powerpc_opcodes, but disable for now.

2008-03-04  Paul Brook  <paul@codesourcery.com>

	* config/tc-arm.c (arm_ext_barrier, arm_ext_msr): New.
	(arm_ext_v7m): Rename...
	(arm_ext_m): ... to this.  Include v6-M.
	(do_t_add_sub): Allow narrow low-reg non flag setting adds.
	(do_t_mrs, do_t_msr, aeabi_set_public_attributes): Use arm_ext_m.
	(md_assemble): Allow wide msr instructions.
	(insns): Add classifications for v6-m instructions.
	(arm_cpu_option_table): Add cortex-m1.
	(arm_arch_option_table): Add armv6-m.
	(cpu_arch): Add ARM_ARCH_V6M.  Fix numbering of other v6 variants.

2008-03-03  Sterling Augustine  <sterling@tensilica.com>
	    Bob Wilson  <bob.wilson@acm.org>
	
	* config/tc-xtensa.c (xtensa_num_pipe_stages): New.
	(md_begin): Initialize it.
	(resources_conflict): Use it.
	
2008-03-03  Sterling Augustine  <sterling@tensilica.com>
	
	* config/tc-xtensa.h (RELAX_XTENSA_NONE): New.
	
2008-03-03  Denys Vlasenko <vda.linux@googlemail.com>
	    H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/5543
	* read.c (pseudo_set): Don't allow global register symbol.

	* symbols.c (S_SET_EXTERNAL): Don't allow register symbol
	global.

2008-03-03  H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/5543
	* write.c (write_object_file): Don't allow symbols which were
	equated to register.  Stop if there is an error.

2008-03-01  Alan Modra  <amodra@bigpond.net.au>

	* config/tc-ppc.h (struct _ppc_fix_extra): New.
	(ppc_cpu): Declare.
	(TC_FIX_TYPE, TC_INIT_FIX_DATA): Define.
	* config/tc-ppc.c (ppu_cpu): Make global.
	(ppc_insert_operand): Add ppu_cpu parameter.
	(md_assemble): Adjust for above change.
	(md_apply_fix): Pass tc_fix_data.ppc_cpu to ppc_insert_operand.

2008-02-22  Nick Clifton  <nickc@redhat.com>

	* config/tc-arm.c (do_bx): Only test EF_ARM_EABI_VERSION on ELF
	targeted ARM ports, otherwise just skip generating the reloc.

2008-02-18  H.J. Lu  <hongjiu.lu@intel.com>

	* doc/c-i386.texi: Update -march= and .arch.

2008-02-18  Nick Clifton  <nickc@redhat.com>

	* config/tc-mn10300.c (has_known_symbol_location): New function.
	Do not regard weak symbols as having a known location.
	(md_estimate_size_before_relax): Use new function.
	(md_pcrel_from): Do not compute a pcrel against a weak symbol.

2008-02-18  Jan Beulich  <jbeulich@novell.com>

	* config/tc-i386.c (match_template): Disallow 'l' suffix when
	currently selected CPU has no 32-bit support.
	(parse_real_register): Do not return registers not available on
	currently selected CPU.

2008-02-16  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (process_immext): Fix format.

2008-02-16  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (inoutportreg): New.
	(process_immext): New.
	(md_assemble): Use it.
	(update_imm): Use imm16 and imm32s.
	(i386_att_operand): Use inoutportreg. 

2008-02-14  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (operand_type_all_zero): New.
	(operand_type_set): Likewise.
	(operand_type_equal): Likewise.
	(cpu_flags_all_zero): Likewise.
	(cpu_flags_set): Likewise.
	(cpu_flags_equal): Likewise.
	(UINTS_ALL_ZERO): Removed.
	(UINTS_SET): Likewise.
	(UINTS_CLEAR): Likewise.
	(UINTS_EQUAL): Likewise.
	(cpu_flags_match): Updated.
	(smallest_imm_type): Likewise.
	(set_cpu_arch): Likewise.
	(md_assemble): Likewise.
	(optimize_imm): Likewise.
	(match_template): Likewise.
	(process_suffix): Likewise.
	(update_imm): Likewise.
	(process_drex): Likewise.
	(process_operands): Likewise.
	(build_modrm_byte): Likewise.
	(i386_immediate): Likewise.
	(i386_displacement): Likewise.
	(i386_att_operand): Likewise.
	(parse_real_register): Likewise.
	(md_parse_option): Likewise.
	(i386_target_format): Likewise.

2008-02-14  Dimitry Andric  <dimitry@andric.com>

	PR gas/5712
	* config/tc-arm.c (s_arm_unwind_save): Advance the input line
	pointer past the comma after parsing a floating point register
	name.

2008-02-14  Hakan Ardo  <hakan@debian.org>

	PR gas/2626
	* config/tc-avr.c (mcu_types): Change the ISA tyoe of the attiny26
	to AVR_ISA_2xxe.
	(avr_operand): Disallow post-increment addressing in the lpm
	instruction for the attiny26.

2008-02-13  Jan Beulich  <jbeulich@novell.com>

	* config/tc-i386.c (parse_real_register): Don't return 'FLAT'
	if not in Intel mode.
	(i386_intel_operand): Ignore segment overrides in immediate and
	offset operands.
	(intel_e11): Range-check i.mem_operands before use as array
	index. Filter out FLAT for uses other than as segment override.
	(intel_get_token): Remove broken promotion of "FLAT:" to mean
	"offset FLAT:".

2008-02-13  Jan Beulich  <jbeulich@novell.com>

	* config/tc-i386.c (intel_e09): Also special-case 'bound'.

2008-02-13  Jan Beulich  <jbeulich@novell.com>

	* config/tc-i386.c (allow_pseudo_reg): New.
	(parse_real_register): Check for NULL just once. Allow all
	register table entries when allow_pseudo_reg is non-zero.
	Don't allow any registers without type when allow_pseudo_reg
	is zero.
	(tc_x86_regname_to_dw2regnum): Replace with ...
	(tc_x86_parse_to_dw2regnum): ... this.
	(tc_x86_frame_initial_instructions): Adjust for above change.
	* config/tc-i386.h (tc_regname_to_dw2regnum): Remove.
	(tc_parse_to_dw2regnum): New.
	(tc_x86_regname_to_dw2regnum): Replace with ...
	(tc_x86_parse_to_dw2regnum): ... this.
	* dw2gencfi.c (tc_parse_to_dw2regnum): New, broken out of ...
	(cfi_parse_reg): ... this. Use tc_parse_to_dw2regnum. Adjust
	error handling.

2008-02-12  Nick Clifton  <nickc@redhat.com>

	* config/tc-tic4x.c (tic4x_insn_insert): Add const qualifier to
	argument.
	(tic4x_insn_add): Likewise.
	(md_begin): Drop cast that was discarding a const qualifier.
	* config/tc-d30v.c (get_reloc): Add const qualifier to op
	argument.
	(build_insn): Drop cast that was discarding a const qualifier.

2008-02-11  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (cpu_arch): Add .xsave.
	(md_show_usage): Add .xsave.

	* doc/c-i386.texi: Add xsave to -march=.

2008-02-07  Alan Modra  <amodra@bigpond.net.au>

	* read.c (s_weakref): Don't pass unadorned NULL to concat.
	* config/tc-i386.c (set_cpu_arch, md_parse_option): Likewise.

2008-02-05  Sterling Augustine  <sterling@tensilica.com>
	
	* config/tc-xtensa.c (relax_frag_immed): Change internal consistency
	checks into assertions.  When relaxation produces an operation that
	does not fit in the current FLIX instruction, make sure that the
	operation is relaxed as needed to account for being placed following
	the current instruction.
	
2008-02-04  H.J. Lu  <hongjiu.lu@intel.com>

	PR 5715
	* configure: Regenerated.

2008-02-04  Adam Nemet  <anemet@caviumnetworks.com>

	* config/tc-mips.c (mips_cpu_info_table): Add Octeon.

2008-01-31  Marc Gauthier  <marc@tensilica.com>

	* configure.tgt (xtensa*-*-*): Recognize processor variants.

2008-01-25  Kai Tietz  <kai.tietz@onevision.com>

	* read.c: (emit_expr): Correct for mingw use of printf size 
	specifier.

2008-01-24  Bob Wilson  <bob.wilson@acm.org>
	
	* doc/c-xtensa.texi (Xtensa Syntax): Clarify handling of opcodes that
	can only be encoded in FLIX instructions but are not specified as such.
	(Xtensa Automatic Alignment): Remove obsolete comment about debugging
	labels.
	
2008-01-24  H.J. Lu  <hongjiu.lu@intel.com>

	* NEWS: Mention new command line options for x86 targets.

2008-01-23  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (md_show_usage): Replace tabs with spaces.

2008-01-23  Eric B. Weddington  <eric.weddington@atmel.com>

	* config/tc-avr.c (mcu_types): Change opcode set for at86rf401.

2008-01-23  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (md_show_usage): Show more processors for
	-march=/-mtune=.

2008-01-22  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (i386_target_format): Remove cpummx2.

2008-01-22  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (XXX_PREFIX): Moved from tc-i386.h.
	(XXX_MNEM_SUFFIX): Likewise.
	(END_OF_INSN): Likewise.
	(templates): Likewise.
	(modrm_byte): Likewise.
	(rex_byte): Likewise.
	(DREX_XXX): Likewise.
	(drex_byte): Likewise.
	(sib_byte): Likewise.
	(processor_type): Likewise.
	(arch_entry): Likewise.
	(cpu_sub_arch_name): Remove const.
	(cpu_arch): Add .vmx and .smx.
	(set_cpu_arch): Append cpu_sub_arch_name.
	(md_parse_option): Support -march=CPU[,+EXTENSION...].
	(md_show_usage): Updated.

	* config/tc-i386.h (XXX_PREFIX): Moved to tc-i386.c.
	(XXX_MNEM_SUFFIX): Likewise.
	(END_OF_INSN): Likewise.
	(templates): Likewise.
	(modrm_byte): Likewise.
	(rex_byte): Likewise.
	(DREX_XXX): Likewise.
	(drex_byte): Likewise.
	(sib_byte): Likewise.
	(processor_type): Likewise.
	(arch_entry): Likewise.

	* doc/as.texinfo: Update i386 -march option.

	* doc/c-i386.texi: Update -march= for ISA.

2008-01-18  Bob Wilson  <bob.wilson@acm.org>
	
	* config/tc-xtensa.c (xtensa_leb128): New function.
	(md_pseudo_table): Use it for sleb128 and uleb128.
	(is_leb128_expr): New internal flag.
	(xtensa_symbol_new_hook): Check new flag.
	
2008-01-16  Eric B. Weddington  <eric.weddington@atmel.com>

	* config/tc-avr.c (mcu_types): Change opcode set for avr3,
	at90usb82, at90usb162.
	* doc/c-avr.texi: Change architecture grouping for at90usb82, 
	at90usb162.
	These changes support the new avr35 architecture group in gcc.

2008-01-15  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (md_assemble): Also zap movzx and movsx
	suffix for AT&T syntax.

2008-01-14  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (match_reg_size): New.
	(match_mem_size): Likewise.
	(operand_size_match): Likewise.
	(operand_type_match): Also clear all size fields.
	(match_template): Skip Intel syntax when in AT&T syntax.
	Call operand_size_match to check operand size.
	(i386_att_operand): Set the mem field to 1 for memory
	operand.
	(i386_intel_operand): Likewise.

2008-01-12  H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/5534
	* config/tc-i386.c (_i386_insn): Update comment.
	(operand_type_match): Also clear unspecified.
	(operand_type_register_match): Likewise.
	(parse_operands): Initialize unspecified.
	(i386_intel_operand): Likewise.
	(match_template): Check memory and accumulator operand size.
	(i386_att_operand): Clear unspecified on register operand.
	(intel_e11): Likewise.
	(intel_e09): Set operand size and clean unspecified for
	"XXX PTR".

2008-01-11  Andreas Schwab  <schwab@suse.de>

	* read.c (s_space): Declare `repeat' as offsetT.

2008-01-10  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (match_template): Check processor support
	first.

2008-01-10  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (match_template): Continue if processor
	doesn't match.

2008-01-09  Alexandre Oliva  <aoliva@redhat.com>

	* config/tc-ia64.c (ia64_convert_frag): Zero-initialize room for
	unwind personality function address.

2008-01-09  Bob Wilson  <bob.wilson@acm.org>
	
	* dwarf2dbg.c (out_sleb128): Delete.
	(size_fixed_inc_line_addr, emit_fixed_inc_line_addr): New.
	(out_fixed_inc_line_addr): Delete.
	(relax_inc_line_addr, dwarf2dbg_estimate_size_before_relax): Call new
	size_fixed_inc_line_addr if DWARF2_USE_FIXED_ADVANCE_PC is set.
	(dwarf2dbg_convert_frag): Likewise for emit_fixed_inc_line_addr.
	(process_entries): Remove calls to out_fixed_inc_line_addr.  When
	DWARF2_USE_FIXED_ADVANCE_PC is set, call relax_inc_line_addr.
	* read.h (emit_expr_fix): New prototype.
	* read.c (emit_expr): Move code to emit_expr_fix and use it here.
	(emit_expr_fix): New.
	
2008-01-09  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (match_template): Check register size
	only when size of operands can be encoded the canonical way.

2008-01-08  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (i386_operand): Renamed to ...
	(i386_att_operand): This.
	(parse_operands): Updated.

2008-01-05  H.J. Lu  <hongjiu.lu@intel.com>

	* doc/c-i386.texi: Update .att_mnemonic and .intel_mnemonic.

	* config/tc-i386.c (set_intel_mnemonic): Set intel_mnemonic
	only.
	(md_assemble): Remove Intel mode workaround.
	(match_template): Check support for old gcc, AT&T mnemonic
	and Intel Syntax.
	(md_parse_option): Don't set intel_mnemonic to 0 for
	OPTION_MOLD_GCC.

2008-01-04  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.h: Update copyright to 2008.

2008-01-04  Nick Clifton  <nickc@redhat.com>

	* config/tc-ppc.c (parse_cpu): Preserve the settings of the
	PPC_OPCODE_ALTIVEC and PPC_OPCODE_SPE flags.

2008-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (md_assemble): Use !intel_mnemonic instead
	of SYSV386_COMPAT.

2008-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	* gas/config/tc-i386.c (cpu_arch_flags_not): Removed.
	(cpu_flags_not): Likewise.
	(cpu_flags_match): Updated to check 64bit and arch.
	(set_code_flag): Remove cpu_arch_flags_not.
	(set_16bit_gcc_code_flag): Likewise.
	(set_cpu_arch): Likewise.
	(md_begin): Likewise.
	(parse_insn): Call cpu_flags_match to check 64bit and arch.
	(match_template): Likewise.

2008-01-03  Jakub Jelinek  <jakub@redhat.com>

	* config/tc-i386.c (process_drex): Initialize modrm_reg and
	modrm_regmem to 0 instead of None.

2008-01-03  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (match_template): Use the xmmword field
	instead of no_xsuf.

2008-01-02  H.J. Lu  <hongjiu.lu@intel.com>

	* config/tc-i386.c (process_suffix): Fix a typo.

2008-01-02  H.J. Lu  <hongjiu.lu@intel.com>

	PR gas/5534
	* config/tc-i386.c (match_template): Handle XMMWORD_MNEM_SUFFIX.
	Check memory size in Intel mode.
	(process_suffix): Handle XMMWORD_MNEM_SUFFIX.
	(intel_e09): Likewise.

	* config/tc-i386.h (XMMWORD_MNEM_SUFFIX): New.

2008-01-02  Catherine Moore  <clm@codesourcery.com>

	* config/tc-mips.c (mips_ip): Check operands on jalr instruction.

For older changes see ChangeLog-2007
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version-control: never
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