error when emerging app-emulation/dynamips-0.2.8_rc3

hello,
when emerge dynamips-0.2.8_rc3 encounter this error:

    # emerge dynamips
Calculating dependencies... done!

>>> Verifying ebuild manifests

>>> Emerging (1 of 1) app-emulation/dynamips-0.2.8_rc3
>>> Downloading 'http://distfiles.gentoo.org/distfiles/dynamips-0.2.8-RC3-community.tar.gz'
 -- 2012-04-11 17:20:15 --  http://distfiles.gentoo.org/distfiles/dynamips-0.2.8-RC3-community.tar.gz
Resolving distfiles.gentoo.org... 156.56.247.195, 216.165.129.135, 64.50.233.100, ...
Connecting to distfiles.gentoo.org|156.56.247.195|:80... connected.
HTTP request sent, awaiting response... 200 OK
Length: 818199 (799K) [application/x-gzip]
Saving to: `/var/calculate/remote/distfiles/dynamips-0.2.8-RC3-community.tar.gz'

100%[======================================>] 818,199      129K/s   in 6.4s    

2012-04-11 17:20:43 (124 KB/s) - `/var/calculate/remote/distfiles/dynamips-0.2.8-RC3-community.tar.gz' saved [818199/818199]

 * dynamips-0.2.8-RC3-community.tar.gz RMD160 SHA1 SHA256 size ;-) ...   [ ok ]
>>> Unpacking source...
>>> Unpacking dynamips-0.2.8-RC3-community.tar.gz to /var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work
>>> Source unpacked in /var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work
>>> Preparing source in /var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community ...
 * Applying dynamips-0.2.8_rc3-makefile.patch ...                        [ ok ]
 * Adjusting Makefiles for X86 ...                                       [ ok ]
>>> Source prepared.
>>> Configuring source in /var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community ...
>>> Source configured.
>>> Compiling source in /var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community ...
make -j5 
make -C stable
make[1]: Entering directory `/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community/stable'
Linking rom2c
Compiling ../common/mempool.c
Compiling ../common/registry.c
Compiling ../common/rbtree.c
Compiling ../common/hash.c
Compiling ../common/sbox.c
Compiling ../common/utils.c
Compiling ../common/parser.c
Compiling ../common/gen_uuid.c
../common/utils.c: In function ‘m_fgets’:
../common/utils.c:268:9: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result
Compiling ../common/plugin.c
Compiling ../common/ptask.c
Compiling ../common/timer.c
Compiling ../common/crc.c
Compiling ../common/base64.c
Compiling ../common/net.c
Compiling ../common/net_io.c
Compiling ../common/net_io_bridge.c
Compiling ../common/net_io_filter.c
Compiling ../common/atm.c
Compiling ../common/atm_vsar.c
Compiling ../common/atm_bridge.c
Compiling ../common/frame_relay.c
Compiling ../common/eth_switch.c
Compiling ../common/dynamips.c
Compiling ../common/insn_lookup.c
Compiling vm.c
../common/insn_lookup.c:318:12: warning: ‘ilt_dump’ defined but not used
../common/insn_lookup.c: In function ‘ilt_store_rfct’:
../common/insn_lookup.c:352:10: warning: ignoring return value of ‘fwrite’, declared with attribute warn_unused_result
../common/insn_lookup.c:353:10: warning: ignoring return value of ‘fwrite’, declared with attribute warn_unused_result
../common/insn_lookup.c:354:10: warning: ignoring return value of ‘fwrite’, declared with attribute warn_unused_result
../common/insn_lookup.c:356:10: warning: ignoring return value of ‘fwrite’, declared with attribute warn_unused_result
vm.c:114:13: warning: ‘vm_object_rebuild_list’ defined but not used
vm.c: In function ‘vm_nvram_extract_config’:
vm.c:962:10: warning: ignoring return value of ‘fwrite’, declared with attribute warn_unused_result
Compiling cpu.c
Compiling ../common/jit_op.c
Compiling mips64.c
Compiling mips64_mem.c
Compiling mips64_cp0.c
Compiling mips64_jit.c
Compiling mips64_exec.c
mips64_mem.c: In function ‘mips64_mts32_slow_lookup’:
mips64_mem.c:391:2: warning: label ‘err_address’ defined but not used
mips64.c: In function ‘mips64_sym_load_file’:
mips64.c:1091:12: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result
mips64.c: In function ‘mips64_restore_state’:
mips64.c:767:12: warning: ignoring return value of ‘fgets’, declared with attribute warn_unused_result
mips64_jit.c:257:33: warning: ‘insn_jump_find’ defined but not used
mips64_jit.c: In function ‘mips64_jit_run_cpu’:
mips64_x86_trans.h:56:4: error: can't find a register in class ‘GENERAL_REGS’ while reloading ‘asm’
mips64_x86_trans.h:56:4: error: ‘asm’ operand has impossible constraints
make[1]: *** [mips64_jit.o] Error 1
make[1]: *** Waiting for unfinished jobs....
make[1]: Leaving directory `/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community/stable'
make: *** [dynamips.stable] Error 2
emake failed
 * ERROR: app-emulation/dynamips-0.2.8_rc3 failed (compile phase):
 *   died running emake, base_src_make
 * 
 * Call stack:
 *     ebuild.sh, line   85:  Called src_compile
 *   environment, line 2096:  Called base_src_compile
 *   environment, line  214:  Called base_src_make
 *   environment, line  252:  Called die
 * The specific snippet of code:
 *           emake "$@" || die "died running emake, $FUNCNAME";
 * 
 * If you need support, post the output of 'emerge --info =app-emulation/dynamips-0.2.8_rc3',
 * the complete build log and the output of 'emerge -pqv =app-emulation/dynamips-0.2.8_rc3'.
 * The complete build log is located at '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/temp/build.log'.
 * The ebuild environment file is located at '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/temp/environment'.
 * S: '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community'

>>> Failed to emerge app-emulation/dynamips-0.2.8_rc3, Log file:

>>>  '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/temp/build.log'

 * Messages for package app-emulation/dynamips-0.2.8_rc3:

 * ERROR: app-emulation/dynamips-0.2.8_rc3 failed (compile phase):
 *   died running emake, base_src_make
 * 
 * Call stack:
 *     ebuild.sh, line   85:  Called src_compile
 *   environment, line 2096:  Called base_src_compile
 *   environment, line  214:  Called base_src_make
 *   environment, line  252:  Called die
 * The specific snippet of code:
 *           emake "$@" || die "died running emake, $FUNCNAME";
 * 
 * If you need support, post the output of 'emerge --info =app-emulation/dynamips-0.2.8_rc3',
 * the complete build log and the output of 'emerge -pqv =app-emulation/dynamips-0.2.8_rc3'.
 * The complete build log is located at '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/temp/build.log'.
 * The ebuild environment file is located at '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/temp/environment'.
 * S: '/var/calculate/tmp/portage/app-emulation/dynamips-0.2.8_rc3/work/dynamips-0.2.8-RC3-community'