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<P>Hi All,<BR>It looks like ARM assembly parser is allowing high registers in LDMIA instruction for v7m architechure.<BR>Specification for Cortex-M3 device specifies that high registers should not be allowed in LDMIA instruction.<BR><BR>cat ldmstm.s :-<BR> ldmia r0!,{r1-r3,r13, r15}<BR><BR><BR><U>GNU assembler version 2.22 (arm-linux-gnueabi) using BFD version (GNU Binutils) 2.22</U></P>
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<P><A href="mailto:jyoti.allur@jyotiallur-ubuntu:~/test/ARM$">jyoti.allur@jyotiallur-ubuntu:~/test/ARM$</A> /opt/tools/arm-linux-gnueabi-gcc-4.5/bin/arm-linux-gnueabi-as -mthumb -mcpu=cortex-m3 ldmstm.s<BR>ldmstm.s: Assembler messages:<BR>ldmstm.s:2: Error: lo register required -- `ldmia r0!,{r1-r3,r13,r15}'</P>
<P><BR><A href="mailto:jyoti.allur@jyotiallur-ubuntu:~/test/ARM$">jyoti.allur@jyotiallur-ubuntu:~/test/ARM$</A> /opt/tools/arm-linux-gnueabi-gcc-4.5/bin/arm-linux-gnueabi-as -mcpu=cortex-m3 ldmstm.s<BR>ldmstm.s: Assembler messages:<BR>ldmstm.s:2: Error: lo register required -- `ldmia r0!,{r1-r3,r13,r15}'<BR><BR></P>
<P><BR><U>LLVM version 3.6.0svn<BR></U><BR><U><SPAN style="COLOR: #0080ff">jyoti.allur@jyotiallur-ubuntu:~/test/ARM$</SPAN></U> ./llvm-mc -triple=thumbv7m--none-eabi ldmstm.s -filetype=obj -o ldmstm.o<BR><U><SPAN style="COLOR: #0079f2">jyoti.allur@jyotiallur-ubuntu:~/test/ARM$</SPAN></U> ./llvm-mc -triple=armv7m--none-eabi ldmstm.s -filetype=obj -o ldmstm.o<BR><SPAN style="COLOR: #0079f2"><U>jyoti.allur@jyotiallur-ubuntu:~/test/ARM$<BR></U><BR></SPAN><BR>I think this is a bug, could some expert in this area confirm it ?</P>
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<P>Regards,</P>
<P>Jyoti Allur</P></BODY></HTML><img src='http://ext.samsung.net/mailcheck/SeenTimeChecker?do=98934eddeedafa1e62d3c8cdd622a6a18a6c316ac7a5d8db8858b930e647c73dbc8d46d65a1d3978434c6ebf74e200ff220d3e02ce1cb961d6250c6ef56fc7aacf878f9a26ce15a0' border=0 width=0 height=0 style='display:none'>