http://llvm.org/bugs/show_bug.cgi?id=8687
Summary: [MC assembler] default suffix of fld mnemonic?
Product: new-bugs
Version: trunk
Platform: PC
OS/Version: FreeBSD
Status: NEW
Severity: normal
Priority: P
Component: new bugs
AssignedTo: [email protected]
ReportedBy: [email protected]
CC: [email protected]
In the FreeBSD tree, there exists this fragment of inline assembly in a
.c file:
float x;
...
__asm __volatile("ffree %%st(7); fld %0" : : "m" (x));
This gets compiled to the following preprocessed assembly:
ffree %st(7)
fld -4(%ebp)
Though the fld mnemonic misses a size suffix such as 's', gas assembles
it anyway, and apparently interprets it as a float operation:
6: dd c7 ffree %st(7)
8: d9 45 fc flds 0xfffffffc(%ebp)
I'm not sure what the right approach is here; it seems rather arbitrary
to use flds by default, but apparently that's what gas does.
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