| Message ID | 20240205104919.14983-1-frediano.ziglio@cloud.com (mailing list archive) |
|---|---|
| State | Superseded |
| Headers | show |
| Series | [1/5] Constify some parameters | expand |
On 05.02.2024 11:49, Frediano Ziglio wrote: > Use 32 bit versions in all cases, not only for registers till 8th. > This reduces the encoding from (example with r14): > > 49 c7 c6 ff 7f 00 00 mov $0x7fff,%r14 > > to > > 41 be ff 7f 00 00 mov $0x7fff,%r14d > > Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com> Reviewed-by: Jan Beulich <jbeulich@suse.com>
diff --git a/xen/arch/x86/include/asm/asm_defns.h b/xen/arch/x86/include/asm/asm_defns.h index 51bf1cf1e6..a9a6c21c76 100644 --- a/xen/arch/x86/include/asm/asm_defns.h +++ b/xen/arch/x86/include/asm/asm_defns.h @@ -136,7 +136,7 @@ register unsigned long current_stack_pointer asm("rsp"); #define STACK_CPUINFO_FIELD(field) (1 - CPUINFO_sizeof + CPUINFO_##field) #define GET_STACK_END(reg) \ .if .Lr##reg >= 8; \ - movq $STACK_SIZE-1, %r##reg; \ + movl $STACK_SIZE-1, %r##reg##d; \ .else; \ movl $STACK_SIZE-1, %e##reg; \ .endif; \
Use 32 bit versions in all cases, not only for registers till 8th. This reduces the encoding from (example with r14): 49 c7 c6 ff 7f 00 00 mov $0x7fff,%r14 to 41 be ff 7f 00 00 mov $0x7fff,%r14d Signed-off-by: Frediano Ziglio <frediano.ziglio@cloud.com> --- xen/arch/x86/include/asm/asm_defns.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-)