1 files changed, 181 insertions, 0 deletions
diff --git a/vp8/common/arm/armv6/copymem16x16_v6.asm b/vp8/common/arm/armv6/copymem16x16_v6.asm
new file mode 100644
index 000000000..00e97397c
--- /dev/null
+++ b/vp8/common/arm/armv6/copymem16x16_v6.asm
@@ -0,0 +1,181 @@
+;
+;  Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
+;
+;  Use of this source code is governed by a BSD-style license and patent
+;  grant that can be found in the LICENSE file in the root of the source
+;  tree. All contributing project authors may be found in the AUTHORS
+;  file in the root of the source tree.
+;
+
+
+    EXPORT  |vp8_copy_mem16x16_v6|
+    ; ARM
+    ; REQUIRE8
+    ; PRESERVE8
+
+    AREA    Block, CODE, READONLY ; name this block of code
+;void copy_mem16x16_v6( unsigned char *src, int src_stride, unsigned char *dst, int dst_stride)
+;-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
+|vp8_copy_mem16x16_v6| PROC
+    stmdb       sp!, {r4 - r7}
+    ;push   {r4-r7}
+
+    ;preload
+    pld     [r0]
+    pld     [r0, r1]
+    pld     [r0, r1, lsl #1]
+
+    ands    r4, r0, #15
+    beq     copy_mem16x16_fast
+
+    ands    r4, r0, #7
+    beq     copy_mem16x16_8
+
+    ands    r4, r0, #3
+    beq     copy_mem16x16_4
+
+    ;copy one byte each time
+    ldrb    r4, [r0]
+    ldrb    r5, [r0, #1]
+    ldrb    r6, [r0, #2]
+    ldrb    r7, [r0, #3]
+
+    mov     r12, #16
+
+copy_mem16x16_1_loop
+    strb    r4, [r2]
+    strb    r5, [r2, #1]
+    strb    r6, [r2, #2]
+    strb    r7, [r2, #3]
+
+    ldrb    r4, [r0, #4]
+    ldrb    r5, [r0, #5]
+    ldrb    r6, [r0, #6]
+    ldrb    r7, [r0, #7]
+
+    subs    r12, r12, #1
+
+    strb    r4, [r2, #4]
+    strb    r5, [r2, #5]
+    strb    r6, [r2, #6]
+    strb    r7, [r2, #7]
+
+    ldrb    r4, [r0, #8]
+    ldrb    r5, [r0, #9]
+    ldrb    r6, [r0, #10]
+    ldrb    r7, [r0, #11]
+
+    strb    r4, [r2, #8]
+    strb    r5, [r2, #9]
+    strb    r6, [r2, #10]
+    strb    r7, [r2, #11]
+
+    ldrb    r4, [r0, #12]
+    ldrb    r5, [r0, #13]
+    ldrb    r6, [r0, #14]
+    ldrb    r7, [r0, #15]
+
+    add     r0, r0, r1
+
+    strb    r4, [r2, #12]
+    strb    r5, [r2, #13]
+    strb    r6, [r2, #14]
+    strb    r7, [r2, #15]
+
+    add     r2, r2, r3
+
+    ldrneb  r4, [r0]
+    ldrneb  r5, [r0, #1]
+    ldrneb  r6, [r0, #2]
+    ldrneb  r7, [r0, #3]
+
+    bne     copy_mem16x16_1_loop
+
+    ldmia       sp!, {r4 - r7}
+    ;pop        {r4-r7}
+    mov     pc, lr
+
+;copy 4 bytes each time
+copy_mem16x16_4
+    ldr     r4, [r0]
+    ldr     r5, [r0, #4]
+    ldr     r6, [r0, #8]
+    ldr     r7, [r0, #12]
+
+    mov     r12, #16
+
+copy_mem16x16_4_loop
+    subs    r12, r12, #1
+    add     r0, r0, r1
+
+    str     r4, [r2]
+    str     r5, [r2, #4]
+    str     r6, [r2, #8]
+    str     r7, [r2, #12]
+
+    add     r2, r2, r3
+
+    ldrne   r4, [r0]
+    ldrne   r5, [r0, #4]
+    ldrne   r6, [r0, #8]
+    ldrne   r7, [r0, #12]
+
+    bne     copy_mem16x16_4_loop
+
+    ldmia       sp!, {r4 - r7}
+    ;pop        {r4-r7}
+    mov     pc, lr
+
+;copy 8 bytes each time
+copy_mem16x16_8
+    sub     r1, r1, #16
+    sub     r3, r3, #16
+
+    mov     r12, #16
+
+copy_mem16x16_8_loop
+    ldmia   r0!, {r4-r5}
+    ;ldm        r0, {r4-r5}
+    ldmia   r0!, {r6-r7}
+
+    add     r0, r0, r1
+
+    stmia   r2!, {r4-r5}
+    subs    r12, r12, #1
+    ;stm        r2, {r4-r5}
+    stmia   r2!, {r6-r7}
+
+    add     r2, r2, r3
+
+    bne     copy_mem16x16_8_loop
+
+    ldmia       sp!, {r4 - r7}
+    ;pop        {r4-r7}
+    mov     pc, lr
+
+;copy 16 bytes each time
+copy_mem16x16_fast
+    ;sub        r1, r1, #16
+    ;sub        r3, r3, #16
+
+    mov     r12, #16
+
+copy_mem16x16_fast_loop
+    ldmia   r0, {r4-r7}
+    ;ldm        r0, {r4-r7}
+    add     r0, r0, r1
+
+    subs    r12, r12, #1
+    stmia   r2, {r4-r7}
+    ;stm        r2, {r4-r7}
+    add     r2, r2, r3
+
+    bne     copy_mem16x16_fast_loop
+
+    ldmia       sp!, {r4 - r7}
+    ;pop        {r4-r7}
+    mov     pc, lr
+
+    ENDP  ; |vp8_copy_mem16x16_v6|
+
+    END