http://sourceware.org/bugzilla/show_bug.cgi?id=16140
Bug ID: 16140
Summary: gas generates nopl and nopw instructions with
-march=k6_2
Product: binutils
Version: 2.23
Status: NEW
Severity: normal
Priority: P2
Component: gas
Assignee: unassigned at sourceware dot org
Reporter: mikulas at artax dot karlin.mff.cuni.cz
The k6-2 processor doesn't support the nopl and nopw instructions with the code
0f 1f. Therefore, gas shouldn't use this instruction for alignment with
-march=k6_2
Example - compile the following source file with "as -march=k6_2 --32"
.global main
main:
xorl %eax, %eax
.balign 8
ret
The result:
00000000 <main>:
0: 31 c0 xor %eax,%eax
2: 66 0f 1f 44 00 00 nopw 0x0(%eax,%eax,1)
8: c3 ret
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