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Diffstat (limited to 'arch/c6x/lib/strasgi.S')
-rw-r--r-- | arch/c6x/lib/strasgi.S | 89 |
1 files changed, 89 insertions, 0 deletions
diff --git a/arch/c6x/lib/strasgi.S b/arch/c6x/lib/strasgi.S new file mode 100644 index 00000000000..de274076553 --- /dev/null +++ b/arch/c6x/lib/strasgi.S @@ -0,0 +1,89 @@ +;; Copyright 2010 Free Software Foundation, Inc. +;; Contributed by Bernd Schmidt <bernds@codesourcery.com>. +;; +;; This program is free software; you can redistribute it and/or modify +;; it under the terms of the GNU General Public License as published by +;; the Free Software Foundation; either version 2 of the License, or +;; (at your option) any later version. +;; +;; This program is distributed in the hope that it will be useful, +;; but WITHOUT ANY WARRANTY; without even the implied warranty of +;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the +;; GNU General Public License for more details. +;; +;; You should have received a copy of the GNU General Public License +;; along with this program; if not, write to the Free Software +;; Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. + +#include <linux/linkage.h> + + .text + +ENTRY(__c6xabi_strasgi) + ;; This is essentially memcpy, with alignment known to be at least + ;; 4, and the size a multiple of 4 greater than or equal to 28. + ldw .d2t1 *B4++, A0 +|| mvk .s2 16, B1 + ldw .d2t1 *B4++, A1 +|| mvk .s2 20, B2 +|| sub .d1 A6, 24, A6 + ldw .d2t1 *B4++, A5 + ldw .d2t1 *B4++, A7 +|| mv .l2x A6, B7 + ldw .d2t1 *B4++, A8 + ldw .d2t1 *B4++, A9 +|| mv .s2x A0, B5 +|| cmpltu .l2 B2, B7, B0 + +_strasgi_loop: + stw .d1t2 B5, *A4++ +|| [B0] ldw .d2t1 *B4++, A0 +|| mv .s2x A1, B5 +|| mv .l2 B7, B6 + + [B0] sub .d2 B6, 24, B7 +|| [B0] b .s2 _strasgi_loop +|| cmpltu .l2 B1, B6, B0 + + [B0] ldw .d2t1 *B4++, A1 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A5, B5 +|| cmpltu .l2 12, B6, B0 + + [B0] ldw .d2t1 *B4++, A5 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A7, B5 +|| cmpltu .l2 8, B6, B0 + + [B0] ldw .d2t1 *B4++, A7 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A8, B5 +|| cmpltu .l2 4, B6, B0 + + [B0] ldw .d2t1 *B4++, A8 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A9, B5 +|| cmpltu .l2 0, B6, B0 + + [B0] ldw .d2t1 *B4++, A9 +|| stw .d1t2 B5, *A4++ +|| mv .s2x A0, B5 +|| cmpltu .l2 B2, B7, B0 + + ;; loop back branch happens here + + cmpltu .l2 B1, B6, B0 +|| ret .s2 b3 + + [B0] stw .d1t1 A1, *A4++ +|| cmpltu .l2 12, B6, B0 + [B0] stw .d1t1 A5, *A4++ +|| cmpltu .l2 8, B6, B0 + [B0] stw .d1t1 A7, *A4++ +|| cmpltu .l2 4, B6, B0 + [B0] stw .d1t1 A8, *A4++ +|| cmpltu .l2 0, B6, B0 + [B0] stw .d1t1 A9, *A4++ + + ;; return happens here +ENDPROC(__c6xabi_strasgi) |