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We should align the stack to a 16-byte boundary for SSE. Ok to commit? Andreas 2001-02-03 Andreas Jaeger <aj@suse.de> * sysdeps/i386/elf/start.S (_start): Align stack to 16-byte boundary for SSE/SSE-2 alignment. ============================================================ Index: sysdeps/i386/elf/start.S --- sysdeps/i386/elf/start.S 2000/06/13 07:27:21 1.13 +++ sysdeps/i386/elf/start.S 2001/02/03 19:26:18 @@ -51,10 +51,11 @@ popl %esi /* Pop the argument count. */ movl %esp, %ecx /* argv starts just at the current stack top.*/ - /* Before pushing the arguments align the stack to a double word - boundary to avoid penalties from misaligned accesses. Thanks - to Edward Seidl <seidl@janed.com> for pointing this out. */ - andl $0xfffffff8, %esp + /* Before pushing the arguments align the stack to a 16-byte + (SSE needs 16-byte alignment) boundary to avoid penalties from + misaligned accesses. Thanks to Edward Seidl <seidl@janed.com> + for pointing this out. */ + andl $0xfffffff0, %esp pushl %eax /* Push garbage because we allocate 28 more bytes. */ -- Andreas Jaeger SuSE Labs aj@suse.de private aj@arthur.inka.de http://www.suse.de/~aj
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