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<base href="http://llvm.org/bugs/" />
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<body><table border="1" cellspacing="0" cellpadding="8">
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<th>Bug ID</th>
<td><a class="bz_bug_link
bz_status_NEW "
title="NEW --- - inline asm"
href="http://llvm.org/bugs/show_bug.cgi?id=21401">21401</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>inline asm
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.4
</td>
</tr>
<tr>
<th>Hardware</th>
<td>PC
</td>
</tr>
<tr>
<th>OS</th>
<td>Windows NT
</td>
</tr>
<tr>
<th>Status</th>
<td>NEW
</td>
</tr>
<tr>
<th>Severity</th>
<td>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>-New Bugs
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>llvmbugzilla@limegreensocks.com
</td>
</tr>
<tr>
<th>CC</th>
<td>llvmbugs@cs.uiuc.edu
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>Created <span class=""><a href="attachment.cgi?id=13256" name="attach_13256" title="inline asm routines that won't compile with -masm=intel">attachment 13256</a> <a href="attachment.cgi?id=13256&action=edit" title="inline asm routines that won't compile with -masm=intel">[details]</a></span>
inline asm routines that won't compile with -masm=intel
I have a public header that needs to support both -masm=att and -masm=intel.
This header works correctly with gcc for both modes, and works correctly with
clang when using -masm=att. However, some of the assembler instructions are
(incorrectly) being rejected by clang as invalid when compiled with
-masm=intel.
The code is attached, the errors are below.
Compile with:
clang -masm=intel -march=native -mtune=native -m64 -o qall.exe qall3.c
clang -v shows:
clang version 3.5.0 (217039)
Target: i686-pc-windows-gnu
Thread model: posix
results:
qall3.c:6:31: error: unknown use of instruction mnemonic without a size suffix
bt -20(%rbp),%edx ; setc -13(%rbp)
^
qall3.c:16:31: error: unknown use of instruction mnemonic without a size suffix
lock bts (%rcx),%edx ; setc -13(%rbp)
^
qall3.c:26:31: error: unknown use of instruction mnemonic without a size suffix
lock btr (%rcx),%edx ; setc -13(%rbp)
^
qall3.c:36:31: error: unknown use of instruction mnemonic without a size suffix
lock btc (%rcx),%edx ; setc -13(%rbp)
^
qall3.c:45:31: error: invalid instruction mnemonic 'stosd'
rep stosd
^
qall3.c:54:31: error: unknown use of instruction mnemonic without a size suffix
in %al,%dx
^
qall3.c:63:31: error: unknown use of instruction mnemonic without a size suffix
in %ax,%dx
^
qall3.c:72:31: error: unknown use of instruction mnemonic without a size suffix
in %eax,%dx
^
qall3.c:79:31: error: unknown use of instruction mnemonic without a size suffix
out %dx,%al
^
qall3.c:86:31: error: unknown use of instruction mnemonic without a size suffix
out %dx,%ax
^
qall3.c:93:31: error: unknown use of instruction mnemonic without a size suffix
out %dx,%eax
^
qall3.c:100:31: error: invalid instruction mnemonic 'insd'
cld ; rep insd
^
qall3.c:108:31: error: invalid instruction mnemonic 'outsd'
cld ; rep outsd
^
qall3.c:116:30: error: invalid operand for instruction
int 0x2c
^~~~
qall3.c:123:18: error: unknown use of instruction mnemonic without a size
suffix
shrd %r9, %rdx, %cl
^
qall3.c:133:18: error: unknown use of instruction mnemonic without a size
suffix
shld %rdx, %r9, %cl</pre>
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