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<base href="https://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 --- - ARM Cortex ASM Statement not understood"
href="https://llvm.org/bugs/show_bug.cgi?id=30352">30352</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>ARM Cortex ASM Statement not understood
</td>
</tr>
<tr>
<th>Product</th>
<td>clang
</td>
</tr>
<tr>
<th>Version</th>
<td>3.9
</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>release blocker
</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>dan@walms.co.uk
</td>
</tr>
<tr>
<th>CC</th>
<td>llvm-bugs@lists.llvm.org
</td>
</tr>
<tr>
<th>Classification</th>
<td>Unclassified
</td>
</tr></table>
<p>
<div>
<pre>ldr.w r0, =0xE000ED88
worked on 3.8.1
but now gives
FreeRTOS\Source\portable\GCC\ARM_CM4F\port.c:687:3: error: invalid operand for
instruction
" ldr.w r0, =0xE000ED88 \n" /* The FPU enable
bits are in the CPACR. */
^
<inline asm>:1:13: note: instantiated into assembly here
ldr.w r0, =0xE000ED88
^
1 error generated.
My actual source:
static void vPortEnableVFP( void )
{
__asm volatile
(
" ldr.w r0, =0xE000ED88 \n" /* The FPU enable bits are in the
CPACR. */
" ldr r1, [r0] \n"
" \n"
" orr r1, r1, #( 0xf << 20 ) \n" /* Enable CP10 and CP11
coprocessors, then save back. */
" str r1, [r0] \n"
" bx r14 "
);
}</pre>
</div>
</p>
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