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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 --- - umaal instruction generated for Cortex-M3"
href="https://llvm.org/bugs/show_bug.cgi?id=31546">31546</a>
</td>
</tr>
<tr>
<th>Summary</th>
<td>umaal instruction generated for Cortex-M3
</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>normal
</td>
</tr>
<tr>
<th>Priority</th>
<td>P
</td>
</tr>
<tr>
<th>Component</th>
<td>LLVM Codegen
</td>
</tr>
<tr>
<th>Assignee</th>
<td>unassignedclangbugs@nondot.org
</td>
</tr>
<tr>
<th>Reporter</th>
<td>mpj@rowley.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>Created <span class=""><a href="attachment.cgi?id=17806" name="attach_17806" title="source code">attachment 17806</a> <a href="attachment.cgi?id=17806&action=edit" title="source code">[details]</a></span>
source code
Source Code Attached
Command line
e:\llvm-3.9.1\bin\clang.exe -c -target arm-none-eabi -mcpu=cortex-m3 umaal.cpp
-O1
Disassembly
.section .text,"ax",%progbits
.global _Stl_mult64(unsigned long long, unsigned long long, unsigned
long long&, unsigned long long&)
.thumb_func
_Stl_mult64(unsigned long long, unsigned long long, unsigned long long&,
unsigned long long&):
push {r4-r6, lr}
umull r12, lr, r2, r0
mov r5, #0
ldr r4, [sp, #20]
umlal lr, r5, r2, r1
umull r0, r2, r3, r0
add.w r6, lr, r0
adds.w r0, r0, lr
adc r0, r2, #0
umaal r5, r0, r3, r1
ldr r1, [sp, #16]
strd r12, r6, [r4, #0]
strd r5, r0, [r1, #0]
pop {r4-r6, pc}</pre>
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