[U-Boot] [PATCH 1/2] arm64: use xzr to zero-out the bss section

AArch64 has a zero register (xzr). Use it instead of x2.

Signed-off-by: Masahiro Yamada yamada.masahiro@socionext.com ---

arch/arm/lib/crt0_64.S | 3 +-- 1 file changed, 1 insertion(+), 2 deletions(-)

diff --git a/arch/arm/lib/crt0_64.S b/arch/arm/lib/crt0_64.S index 91b19e0..f8e84b2 100644 --- a/arch/arm/lib/crt0_64.S +++ b/arch/arm/lib/crt0_64.S @@ -117,9 +117,8 @@ relocation_return: */ ldr x0, =__bss_start /* this is auto-relocated! */ ldr x1, =__bss_end /* this is auto-relocated! */ - mov x2, #0 clear_loop: - str x2, [x0] + str xzr, [x0] add x0, x0, #8 cmp x0, x1 b.lo clear_loop