775 lines
22 KiB
NASM
775 lines
22 KiB
NASM
;
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; Copyright (c) 2010 The VP8 project authors. All Rights Reserved.
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;
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; Use of this source code is governed by a BSD-style license
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; that can be found in the LICENSE file in the root of the source
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; tree. An additional intellectual property rights grant can be found
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; in the file PATENTS. All contributing project authors may
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; be found in the AUTHORS file in the root of the source tree.
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;
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EXPORT |horizontal_line_4_5_scale_armv4|
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EXPORT |vertical_band_4_5_scale_armv4|
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EXPORT |horizontal_line_2_3_scale_armv4|
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EXPORT |vertical_band_2_3_scale_armv4|
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EXPORT |horizontal_line_3_5_scale_armv4|
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EXPORT |vertical_band_3_5_scale_armv4|
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EXPORT |horizontal_line_3_4_scale_armv4|
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EXPORT |vertical_band_3_4_scale_armv4|
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EXPORT |horizontal_line_1_2_scale_armv4|
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EXPORT |vertical_band_1_2_scale_armv4|
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AREA |.text|, CODE, READONLY ; name this block of code
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src RN r0
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srcw RN r1
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dest RN r2
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mask RN r12
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c51_205 RN r10
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c102_154 RN r11
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;/****************************************************************************
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; *
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; * ROUTINE : horizontal_line_4_5_scale_armv4
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; *
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; * INPUTS : const unsigned char *source : Pointer to source data.
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; * unsigned int source_width : Stride of source.
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; * unsigned char *dest : Pointer to destination data.
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; * unsigned int dest_width : Stride of destination (NOT USED).
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; *
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; * OUTPUTS : None.
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; *
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; * RETURNS : void
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; *
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; * FUNCTION : Copies horizontal line of pixels from source to
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; * destination scaling up by 4 to 5.
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; *
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; * SPECIAL NOTES : None.
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; *
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; ****************************************************************************/
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;void horizontal_line_4_5_scale_armv4
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;(
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; r0 = UINT8 *source
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; r1 = UINT32 source_width
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; r2 = UINT8 *dest
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; r3 = UINT32 dest_width
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;)
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|horizontal_line_4_5_scale_armv4| PROC
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stmdb sp!, {r4 - r11, lr}
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mov mask, #255 ; mask for selection
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ldr c51_205, =0x3300cd
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ldr c102_154, =0x66009a
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ldr r3, [src], #4
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hl45_loop
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and r4, r3, mask ; a = src[0]
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and r5, mask, r3, lsr #8 ; b = src[1]
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strb r4, [dest], #1
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orr r6, r4, r5, lsl #16 ; b | a
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and r7, mask, r3, lsr #16 ; c = src[2]
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mul r6, c51_205, r6 ; a * 51 + 205 * b
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orr r5, r5, r7, lsl #16 ; c | b
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mul r5, c102_154, r5 ; b * 102 + 154 * c
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add r6, r6, #0x8000
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and r8, mask, r3, lsr #24 ; d = src[3]
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mov r6, r6, lsr #24
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strb r6, [dest], #1
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orr r7, r8, r7, lsl #16 ; c | d
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mul r7, c102_154, r7 ; c * 154 + 102 * d
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add r5, r5, #0x8000
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ldr r3, [src], #4
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mov r5, r5, lsr #24
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strb r5, [dest], #1
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add r7, r7, #0x8000
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and r9, mask, r3 ; e = src[4]
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orr r9, r9, r8, lsl #16 ; d | e
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mul r9, c51_205, r9 ; d * 205 + 51 * e
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mov r7, r7, lsr #24
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strb r7, [dest], #1
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add r9, r9, #0x8000
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subs srcw, srcw, #4
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mov r9, r9, lsr #24
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strb r9, [dest], #1
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bne hl45_loop
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and r4, r3, mask
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and r5, mask, r3, lsl #8
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strb r4, [dest], #1
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orr r6, r4, r5, lsl #16 ; b | a
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mul r6, c51_205, r6
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and r7, mask, r3, lsl #16
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orr r5, r5, r7, lsl #16 ; c | b
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mul r5, c102_154, r5
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add r6, r6, #0x8000
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and r8, mask, r3, lsl #24
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mov r6, r6, lsr #24
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strb r6, [dest], #1
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orr r7, r8, r7, lsl #16 ; c | d
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mul r7, c102_154, r7
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add r5, r5, #0x8000
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mov r5, r5, lsr #24
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strb r5, [dest], #1
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add r7, r7, #0x8000
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mov r7, r7, lsr #24
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strb r7, [dest], #1
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ldrb r3, [src]
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strb r3, [dest], #1
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ldmia sp!, {r4 - r11, pc}
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ENDP ;|vp8cx_horizontal_line_4_5_scale_c|
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;/****************************************************************************
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; *
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; * ROUTINE : vertical_band_4_5_scale_armv4
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; *
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; * INPUTS : unsigned char *dest : Pointer to destination data.
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; * unsigned int dest_pitch : Stride of destination data.
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; * unsigned int dest_width : Width of destination data.
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; *
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; * OUTPUTS : None.
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; *
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; * RETURNS : void
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; *
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; * FUNCTION : Scales vertical band of pixels by scale 4 to 5. The
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; * height of the band scaled is 4-pixels.
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; *
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; * SPECIAL NOTES : The routine uses the first line of the band below
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; * the current band.
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; *
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; ****************************************************************************/
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;void vertical_band_4_5_scale_armv4
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;(
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; r0 = UINT8 *dest
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; r1 = UINT32 dest_pitch
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; r2 = UINT32 dest_width
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;)
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|vertical_band_4_5_scale_armv4| PROC
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stmdb sp!, {r4 - r11, lr}
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ldr c51_205, =0x3300cd
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ldr c102_154, =0x66009a
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vl45_loop
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mov r3, src
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ldrb r4, [r3], r1 ; a = des [0]
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ldrb r5, [r3], r1 ; b = des [dest_pitch]
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ldrb r7, [r3], r1 ; c = des[dest_pitch*2]
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add lr, src, r1
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orr r6, r4, r5, lsl #16 ; b | a
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mul r6, c51_205, r6 ; a * 51 + 205 * b
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ldrb r8, [r3], r1 ; d = des[dest_pitch*3]
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orr r5, r5, r7, lsl #16 ; c | b
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mul r5, c102_154, r5 ; b * 102 + 154 * c
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add r6, r6, #0x8000
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orr r7, r8, r7, lsl #16 ; c | d
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mov r6, r6, lsr #24
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strb r6, [lr], r1
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ldrb r9, [r3, r1] ; e = des [dest_pitch * 5]
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mul r7, c102_154, r7 ; c * 154 + 102 * d
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add r5, r5, #0x8000
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orr r9, r9, r8, lsl #16 ; d | e
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mov r5, r5, lsr #24
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strb r5, [lr], r1
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mul r9, c51_205, r9 ; d * 205 + 51 * e
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add r7, r7, #0x8000
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add src, src, #1
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mov r7, r7, lsr #24
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strb r7, [lr], r1
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add r9, r9, #0x8000
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subs r2, r2, #1
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mov r9, r9, lsr #24
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strb r9, [lr], r1
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bne vl45_loop
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ldmia sp!, {r4 - r11, pc}
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ENDP ;|vertical_band_4_5_scale_armv4|
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;/****************************************************************************
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; *
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; * ROUTINE : horizontal_line_2_3_scale_armv4
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; *
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; * INPUTS : const unsigned char *source : Pointer to source data.
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; * unsigned int source_width : Stride of source.
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; * unsigned char *dest : Pointer to destination data.
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; * unsigned int dest_width : Stride of destination (NOT USED).
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; *
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; * OUTPUTS : None.
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; *
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; * RETURNS : void
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; *
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; * FUNCTION : Copies horizontal line of pixels from source to
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; * destination scaling up by 2 to 3.
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; *
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; * SPECIAL NOTES : None.
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; *
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; *
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; ****************************************************************************/
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;void horizontal_line_2_3_scale_armv4
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;(
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; const unsigned char *source,
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; unsigned int source_width,
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; unsigned char *dest,
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; unsigned int dest_width
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;)
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|horizontal_line_2_3_scale_armv4| PROC
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stmdb sp!, {r4 - r11, lr}
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ldr lr, =85
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ldr r12, =171
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hl23_loop
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ldrb r3, [src], #1 ; a
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ldrb r4, [src], #1 ; b
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ldrb r5, [src] ; c
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strb r3, [dest], #1
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mul r4, r12, r4 ; b * 171
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mla r6, lr, r3, r4 ; a * 85
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mla r7, lr, r5, r4 ; c * 85
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add r6, r6, #128
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mov r6, r6, lsr #8
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strb r6, [dest], #1
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add r7, r7, #128
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mov r7, r7, lsr #8
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strb r7, [dest], #1
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subs srcw, srcw, #2
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bne hl23_loop
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ldrb r4, [src, #1] ; b
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strb r5, [dest], #1
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strb r4, [dest, #1]
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mul r4, r12, r4 ; b * 171
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mla r6, lr, r5, r4 ; a * 85 + b *171
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add r6, r6, #128
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mov r6, r6, lsr #8
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strb r6, [dest]
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ldmia sp!, {r4 - r11, pc}
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ENDP ;|horizontal_line_2_3_scale_armv4|
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;/****************************************************************************
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; *
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; * ROUTINE : vertical_band_2_3_scale_armv4
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; *
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; * INPUTS : unsigned char *dest : Pointer to destination data.
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; * unsigned int dest_pitch : Stride of destination data.
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; * unsigned int dest_width : Width of destination data.
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; *
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; * OUTPUTS : None.
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; *
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; * RETURNS : void
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; *
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; * FUNCTION : Scales vertical band of pixels by scale 2 to 3. The
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; * height of the band scaled is 2-pixels.
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; *
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; * SPECIAL NOTES : The routine uses the first line of the band below
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; * the current band.
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; *
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; ****************************************************************************/
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;void vertical_band_2_3_scale_armv4
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;(
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; r0 = UINT8 *dest
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; r1 = UINT32 dest_pitch
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; r2 = UINT32 dest_width
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;)
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|vertical_band_2_3_scale_armv4| PROC
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stmdb sp!, {r4 - r8, lr}
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ldr lr, =85
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ldr r12, =171
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add r3, r1, r1, lsl #1 ; 3 * dest_pitch
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vl23_loop
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ldrb r4, [src] ; a = des [0]
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ldrb r5, [src, r1] ; b = des [dest_pitch]
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ldrb r7, [src, r3] ; c = des [dest_pitch*3]
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subs r2, r2, #1
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mul r5, r12, r5 ; b * 171
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mla r6, lr, r4, r5 ; a * 85
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mla r8, lr, r7, r5 ; c * 85
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add r6, r6, #128
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mov r6, r6, lsr #8
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strb r6, [src, r1]
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add r8, r8, #128
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mov r8, r8, lsr #8
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strb r8, [src, r1, lsl #1]
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add src, src, #1
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bne vl23_loop
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ldmia sp!, {r4 - r8, pc}
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ENDP ;|vertical_band_2_3_scale_armv4|
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;/****************************************************************************
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; *
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; * ROUTINE : vp8cx_horizontal_line_3_5_scale_c
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; *
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; * INPUTS : const unsigned char *source : Pointer to source data.
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; * unsigned int source_width : Stride of source.
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; * unsigned char *dest : Pointer to destination data.
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; * unsigned int dest_width : Stride of destination (NOT USED).
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; *
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; * OUTPUTS : None.
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; *
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; * RETURNS : void
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; *
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; * FUNCTION : Copies horizontal line of pixels from source to
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; * destination scaling up by 3 to 5.
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; *
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; * SPECIAL NOTES : None.
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; *
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; *
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; ****************************************************************************/
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;void vp8cx_horizontal_line_3_5_scale_c
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;(
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; const unsigned char *source,
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; unsigned int source_width,
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; unsigned char *dest,
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; unsigned int dest_width
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;)
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|horizontal_line_3_5_scale_armv4| PROC
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stmdb sp!, {r4 - r11, lr}
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ldr c51_205, =0x3300cd
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ldr c102_154, =0x66009a
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ldrb r4, [src], #1 ; a = src[0]
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hl35_loop
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ldrb r8, [src], #1 ; b = src[1]
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strb r4, [dest], #1
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orr r6, r4, r8, lsl #16 ; b | a
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ldrb r9, [src], #1 ; c = src[2]
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mul r6, c102_154, r6 ; a * 102 + 154 * b
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orr r5, r9, r8, lsl #16 ; b | c
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mul r5, c51_205, r5 ; b * 205 + 51 * c
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add r6, r6, #0x8000
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ldrb r4, [src], #1 ; d = src[3]
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mov r6, r6, lsr #24
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strb r6, [dest], #1
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orr r7, r8, r9, lsl #16 ; c | b
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mul r7, c51_205, r7 ; c * 205 + 154 * b
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add r5, r5, #0x8000
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mov r5, r5, lsr #24
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strb r5, [dest], #1
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orr r9, r4, r9, lsl #16 ; c | d
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mul r9, c102_154, r9 ; c * 154 + 102 * d
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add r7, r7, #0x8000
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mov r7, r7, lsr #24
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strb r7, [dest], #1
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add r9, r9, #0x8000
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subs srcw, srcw, #3
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mov r9, r9, lsr #24
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strb r9, [dest], #1
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bpl hl35_loop
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ldrb r5, [src], #1 ; b = src[1]
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strb r4, [dest], #1
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orr r6, r4, r8, lsl #16 ; b | a
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ldrb r9, [src], #1 ; c = src[2]
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mul r6, c102_154, r6 ; a * 102 + 154 * b
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orr r5, r9, r8, lsl #16 ; b | c
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mul r5, c51_205, r5 ; b * 205 + 51 * c
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add r6, r6, #0x8000
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mov r6, r6, lsr #24
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strb r6, [dest], #1
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orr r7, r8, r9, lsl #16 ; c | b
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mul r7, c51_205, r7 ; c * 205 + 154 * b
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add r5, r5, #0x8000
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mov r5, r5, lsr #24
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strb r5, [dest], #1
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add r7, r7, #0x8000
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mov r7, r7, lsr #24
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strb r7, [dest], #1
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strb r9, [dest], #1
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ldmia sp!, {r4 - r11, pc}
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ENDP ;|vp8cx_horizontal_line_3_5_scale_c|
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;/****************************************************************************
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; *
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; * ROUTINE : vp8cx_vertical_band_3_5_scale_c
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; *
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; * INPUTS : unsigned char *dest : Pointer to destination data.
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; * unsigned int dest_pitch : Stride of destination data.
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; * unsigned int dest_width : Width of destination data.
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; *
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; * OUTPUTS : None.
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; *
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; * RETURNS : void
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; *
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; * FUNCTION : Scales vertical band of pixels by scale 3 to 5. The
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; * height of the band scaled is 3-pixels.
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; *
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; * SPECIAL NOTES : The routine uses the first line of the band below
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; * the current band.
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; *
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; ****************************************************************************/
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;void vertical_band_4_5_scale_armv4
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;(
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; r0 = UINT8 *dest
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; r1 = UINT32 dest_pitch
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; r2 = UINT32 dest_width
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;)
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|vertical_band_3_5_scale_armv4| PROC
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stmdb sp!, {r4 - r11, lr}
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ldr c51_205, =0x3300cd
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ldr c102_154, =0x66009a
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vl35_loop
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mov r3, src
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ldrb r4, [r3], r1 ; a = des [0]
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ldrb r5, [r3], r1 ; b = des [dest_pitch]
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ldrb r7, [r3], r1 ; c = des[dest_pitch*2]
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add lr, src, r1
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orr r8, r4, r5, lsl #16 ; b | a
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mul r6, c102_154, r8 ; a * 102 + 154 * b
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ldrb r8, [r3, r1, lsl #1] ; d = des[dest_pitch*5]
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orr r3, r7, r5, lsl #16 ; b | c
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mul r9, c51_205, r3 ; b * 205 + 51 * c
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add r6, r6, #0x8000
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orr r3, r5, r7, lsl #16 ; c | b
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mov r6, r6, lsr #24
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strb r6, [lr], r1
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mul r5, c51_205, r3 ; c * 205 + 154 * b
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add r9, r9, #0x8000
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orr r3, r8, r7, lsl #16 ; c | d
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mov r9, r9, lsr #24
|
|
strb r9, [lr], r1
|
|
|
|
mul r7, c102_154, r3 ; c * 154 + 102 * d
|
|
add r5, r5, #0x8000
|
|
add src, src, #1
|
|
mov r5, r5, lsr #24
|
|
strb r5, [lr], r1
|
|
|
|
add r7, r7, #0x8000
|
|
subs r2, r2, #1
|
|
mov r7, r7, lsr #24
|
|
strb r7, [lr], r1
|
|
|
|
|
|
bne vl35_loop
|
|
|
|
ldmia sp!, {r4 - r11, pc}
|
|
ENDP ;|vertical_band_3_5_scale_armv4|
|
|
|
|
;/****************************************************************************
|
|
; *
|
|
; * ROUTINE : horizontal_line_3_4_scale_armv4
|
|
; *
|
|
; * INPUTS : const unsigned char *source : Pointer to source data.
|
|
; * unsigned int source_width : Stride of source.
|
|
; * unsigned char *dest : Pointer to destination data.
|
|
; * unsigned int dest_width : Stride of destination (NOT USED).
|
|
; *
|
|
; * OUTPUTS : None.
|
|
; *
|
|
; * RETURNS : void
|
|
; *
|
|
; * FUNCTION : Copies horizontal line of pixels from source to
|
|
; * destination scaling up by 3 to 4.
|
|
; *
|
|
; * SPECIAL NOTES : None.
|
|
; *
|
|
; *
|
|
; ****************************************************************************/
|
|
;void horizontal_line_3_4_scale_armv4
|
|
;(
|
|
; const unsigned char *source,
|
|
; unsigned int source_width,
|
|
; unsigned char *dest,
|
|
; unsigned int dest_width
|
|
;)
|
|
|horizontal_line_3_4_scale_armv4| PROC
|
|
stmdb sp!, {r4 - r11, lr}
|
|
|
|
ldr r10, =64
|
|
ldr r11, =192
|
|
mov r9, #128
|
|
|
|
ldrb r4, [src], #1 ; a = src[0]
|
|
|
|
hl34_loop
|
|
|
|
ldrb r8, [src], #1 ; b = src[1]
|
|
ldrb r7, [src], #1 ; c = src[2]
|
|
strb r4, [dest], #1
|
|
|
|
mla r4, r10, r4, r9 ; a*64 + 128
|
|
mla r4, r11, r8, r4 ; a*64 + b*192 + 1
|
|
|
|
add r8, r8, #1 ; b + 1
|
|
add r8, r8, r7 ; b + c + 1
|
|
mov r8, r8, asr #1 ; (b + c + 1) >> 1
|
|
|
|
mov r4, r4, asr #8 ; (a*64 + b*192 + 1) >> 8
|
|
strb r4, [dest], #1
|
|
|
|
strb r8, [dest], #1
|
|
|
|
ldrb r4, [src], #1 ; [a+1]
|
|
|
|
mla r7, r11, r7, r9 ; c*192 + 128
|
|
mla r7, r4, r10, r7 ; a*64 + b*192 + 128
|
|
|
|
subs srcw, srcw, #3
|
|
|
|
mov r7, r7, asr #8 ; (a*64 + b*192 + 128) >> 8
|
|
strb r7, [dest], #1
|
|
|
|
bpl hl34_loop
|
|
|
|
ldrb r8, [src], #1 ; b = src[1]
|
|
ldrb r7, [src], #1 ; c = src[2]
|
|
strb r4, [dest], #1
|
|
|
|
mla r4, r10, r4, r9 ; a*64 + 128
|
|
mla r4, r11, r8, r4 ; a*64 + b*192 + 1
|
|
mov r4, r4, asr #8 ; (a*64 + b*192 + 1) >> 8
|
|
strb r4, [dest], #1
|
|
|
|
add r8, r8, #1 ; b + 1
|
|
add r8, r8, r7 ; b + c + 1
|
|
mov r8, r8, asr #1 ; (b + c + 1) >> 1
|
|
strb r8, [dest], #1
|
|
strb r7, [dest], #1
|
|
|
|
ldmia sp!, {r4 - r11, pc}
|
|
ENDP ;|vp8cx_horizontal_line_3_4_scale_c|
|
|
|
|
|
|
;/****************************************************************************
|
|
; *
|
|
; * ROUTINE : vertical_band_3_4_scale_armv4
|
|
; *
|
|
; * INPUTS : unsigned char *dest : Pointer to destination data.
|
|
; * unsigned int dest_pitch : Stride of destination data.
|
|
; * unsigned int dest_width : Width of destination data.
|
|
; *
|
|
; * OUTPUTS : None.
|
|
; *
|
|
; * RETURNS : void
|
|
; *
|
|
; * FUNCTION : Scales vertical band of pixels by scale 3 to 4. The
|
|
; * height of the band scaled is 3-pixels.
|
|
; *
|
|
; * SPECIAL NOTES : The routine uses the first line of the band below
|
|
; * the current band.
|
|
; *
|
|
; ****************************************************************************/
|
|
;void vertical_band_3_4_scale_armv4
|
|
;(
|
|
; r0 = UINT8 *dest
|
|
; r1 = UINT32 dest_pitch
|
|
; r2 = UINT32 dest_width
|
|
;)
|
|
|vertical_band_3_4_scale_armv4| PROC
|
|
stmdb sp!, {r4 - r11, lr}
|
|
|
|
ldr r10, =64
|
|
ldr r11, =192
|
|
mov r9, #128
|
|
|
|
; ldr r1,[r1]
|
|
vl34_loop
|
|
mov r3, src
|
|
ldrb r4, [r3], r1 ; a = des [0]
|
|
ldrb r5, [r3], r1 ; b = des [dest_pitch]
|
|
ldrb r7, [r3], r1 ; c = des [dest_pitch*2]
|
|
add lr, src, r1
|
|
|
|
mla r4, r10, r4, r9 ; a*64 + 128
|
|
mla r4, r11, r5, r4 ; a*64 + b*192 + 1
|
|
|
|
add r5, r5, #1 ; b + 1
|
|
add r5, r5, r7 ; b + c + 1
|
|
mov r5, r5, asr #1 ; (b + c + 1) >> 1
|
|
|
|
mov r4, r4, asr #8 ; (a*64 + b*192 + 1) >> 8
|
|
strb r4, [lr], r1
|
|
|
|
ldrb r4, [r3, r1] ; a = des [dest_pitch*4]
|
|
|
|
strb r5, [lr], r1
|
|
|
|
mla r7, r11, r7, r9 ; c*192 + 128
|
|
mla r7, r4, r10, r7 ; a*64 + b*192 + 128
|
|
mov r7, r7, asr #8 ; (a*64 + b*192 + 128) >> 8
|
|
|
|
add src, src, #1
|
|
subs r2, r2, #1
|
|
|
|
strb r7, [lr]
|
|
|
|
bne vl34_loop
|
|
|
|
ldmia sp!, {r4 - r11, pc}
|
|
ENDP ;|vertical_band_3_4_scale_armv4|
|
|
|
|
;/****************************************************************************
|
|
; *
|
|
; * ROUTINE : vp8cx_horizontal_line_1_2_scale_c
|
|
; *
|
|
; * INPUTS : const unsigned char *source : Pointer to source data.
|
|
; * unsigned int source_width : Stride of source.
|
|
; * unsigned char *dest : Pointer to destination data.
|
|
; * unsigned int dest_width : Stride of destination (NOT USED).
|
|
; *
|
|
; * OUTPUTS : None.
|
|
; *
|
|
; * RETURNS : void
|
|
; *
|
|
; * FUNCTION : Copies horizontal line of pixels from source to
|
|
; * destination scaling up by 1 to 2.
|
|
; *
|
|
; * SPECIAL NOTES : None.
|
|
; *
|
|
; ****************************************************************************/
|
|
;void vp8cx_horizontal_line_1_2_scale_c
|
|
;(
|
|
; const unsigned char *source,
|
|
; unsigned int source_width,
|
|
; unsigned char *dest,
|
|
; unsigned int dest_width
|
|
;)
|
|
|horizontal_line_1_2_scale_armv4| PROC
|
|
stmdb sp!, {r4 - r5, lr}
|
|
|
|
sub srcw, srcw, #1
|
|
|
|
ldrb r3, [src], #1
|
|
ldrb r4, [src], #1
|
|
hl12_loop
|
|
subs srcw, srcw, #1
|
|
|
|
add r5, r3, r4
|
|
add r5, r5, #1
|
|
mov r5, r5, lsr #1
|
|
|
|
orr r5, r3, r5, lsl #8
|
|
strh r5, [dest], #2
|
|
|
|
mov r3, r4
|
|
|
|
ldrneb r4, [src], #1
|
|
bne hl12_loop
|
|
|
|
orr r5, r4, r4, lsl #8
|
|
strh r5, [dest]
|
|
|
|
ldmia sp!, {r4 - r5, pc}
|
|
ENDP ;|vertical_band_3_5_scale_armv4|
|
|
|
|
;/****************************************************************************
|
|
; *
|
|
; * ROUTINE : vp8cx_vertical_band_1_2_scale_c
|
|
; *
|
|
; * INPUTS : unsigned char *dest : Pointer to destination data.
|
|
; * unsigned int dest_pitch : Stride of destination data.
|
|
; * unsigned int dest_width : Width of destination data.
|
|
; *
|
|
; * OUTPUTS : None.
|
|
; *
|
|
; * RETURNS : void
|
|
; *
|
|
; * FUNCTION : Scales vertical band of pixels by scale 1 to 2. The
|
|
; * height of the band scaled is 1-pixel.
|
|
; *
|
|
; * SPECIAL NOTES : The routine uses the first line of the band below
|
|
; * the current band.
|
|
; *
|
|
; ****************************************************************************/
|
|
;void vp8cx_vertical_band_1_2_scale_c
|
|
;(
|
|
; r0 = UINT8 *dest
|
|
; r1 = UINT32 dest_pitch
|
|
; r2 = UINT32 dest_width
|
|
;)
|
|
|vertical_band_1_2_scale_armv4| PROC
|
|
stmdb sp!, {r4 - r7, lr}
|
|
|
|
ldr mask, =0xff00ff ; mask for selection
|
|
ldr lr, = 0x010001
|
|
|
|
vl12_loop
|
|
mov r3, src
|
|
ldr r4, [r3], r1
|
|
ldr r5, [r3, r1]
|
|
|
|
add src, src, #4
|
|
subs r2, r2, #4
|
|
|
|
and r6, r4, mask
|
|
and r7, r5, mask
|
|
|
|
add r6, r7, r6
|
|
add r6, r6, lr
|
|
|
|
and r4, mask, r4, lsr #8
|
|
and r5, mask, r5, lsr #8
|
|
|
|
mov r6, r6, lsr #1
|
|
and r6, r6, mask
|
|
|
|
add r4, r5, r4
|
|
add r4, r4, lr
|
|
|
|
mov r4, r4, lsr #1
|
|
and r4, r4, mask
|
|
|
|
orr r5, r6, r4, lsl #8
|
|
|
|
str r5, [r3]
|
|
|
|
bpl vl12_loop
|
|
|
|
ldmia sp!, {r4 - r7, pc}
|
|
ENDP ;|vertical_band_3_5_scale_armv4|
|
|
|
|
END
|