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vpx/vpx_scale/wce/gen_scalers_armv4.asm
John Koleszar c2140b8af1 Use WebM in copyright notice for consistency 
Changes 'The VP8 project' to 'The WebM project', for consistency
with other webmproject.org repositories.

Fixes issue #97.

Change-Id: I37c13ed5fbdb9d334ceef71c6350e9febed9bbba
2010-09-09 10:01:21 -04:00

775 lines
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;
; Copyright (c) 2010 The WebM project authors. All Rights Reserved.
;
; Use of this source code is governed by a BSD-style license
; that can be found in the LICENSE file in the root of the source
; tree. An additional intellectual property rights grant can be found
; in the file PATENTS. All contributing project authors may
; be found in the AUTHORS file in the root of the source tree.
;
EXPORT |horizontal_line_4_5_scale_armv4|
EXPORT |vertical_band_4_5_scale_armv4|
EXPORT |horizontal_line_2_3_scale_armv4|
EXPORT |vertical_band_2_3_scale_armv4|
EXPORT |horizontal_line_3_5_scale_armv4|
EXPORT |vertical_band_3_5_scale_armv4|
EXPORT |horizontal_line_3_4_scale_armv4|
EXPORT |vertical_band_3_4_scale_armv4|
EXPORT |horizontal_line_1_2_scale_armv4|
EXPORT |vertical_band_1_2_scale_armv4|
AREA |.text|, CODE, READONLY ; name this block of code
src RN r0
srcw RN r1
dest RN r2
mask RN r12
c51_205 RN r10
c102_154 RN r11
;/****************************************************************************
; *
; * ROUTINE : horizontal_line_4_5_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 4 to 5.
; *
; * SPECIAL NOTES : None.
; *
; ****************************************************************************/
;void horizontal_line_4_5_scale_armv4
;(
; r0 = UINT8 *source
; r1 = UINT32 source_width
; r2 = UINT8 *dest
; r3 = UINT32 dest_width
;)
|horizontal_line_4_5_scale_armv4| PROC
stmdb sp!, {r4 - r11, lr}
mov mask, #255 ; mask for selection
ldr c51_205, =0x3300cd
ldr c102_154, =0x66009a
ldr r3, [src], #4
hl45_loop
and r4, r3, mask ; a = src[0]
and r5, mask, r3, lsr #8 ; b = src[1]
strb r4, [dest], #1
orr r6, r4, r5, lsl #16 ; b | a
and r7, mask, r3, lsr #16 ; c = src[2]
mul r6, c51_205, r6 ; a * 51 + 205 * b
orr r5, r5, r7, lsl #16 ; c | b
mul r5, c102_154, r5 ; b * 102 + 154 * c
add r6, r6, #0x8000
and r8, mask, r3, lsr #24 ; d = src[3]
mov r6, r6, lsr #24
strb r6, [dest], #1
orr r7, r8, r7, lsl #16 ; c | d
mul r7, c102_154, r7 ; c * 154 + 102 * d
add r5, r5, #0x8000
ldr r3, [src], #4
mov r5, r5, lsr #24
strb r5, [dest], #1
add r7, r7, #0x8000
and r9, mask, r3 ; e = src[4]
orr r9, r9, r8, lsl #16 ; d | e
mul r9, c51_205, r9 ; d * 205 + 51 * e
mov r7, r7, lsr #24
strb r7, [dest], #1
add r9, r9, #0x8000
subs srcw, srcw, #4
mov r9, r9, lsr #24
strb r9, [dest], #1
bne hl45_loop
and r4, r3, mask
and r5, mask, r3, lsl #8
strb r4, [dest], #1
orr r6, r4, r5, lsl #16 ; b | a
mul r6, c51_205, r6
and r7, mask, r3, lsl #16
orr r5, r5, r7, lsl #16 ; c | b
mul r5, c102_154, r5
add r6, r6, #0x8000
and r8, mask, r3, lsl #24
mov r6, r6, lsr #24
strb r6, [dest], #1
orr r7, r8, r7, lsl #16 ; c | d
mul r7, c102_154, r7
add r5, r5, #0x8000
mov r5, r5, lsr #24
strb r5, [dest], #1
add r7, r7, #0x8000
mov r7, r7, lsr #24
strb r7, [dest], #1
ldrb r3, [src]
strb r3, [dest], #1
ldmia sp!, {r4 - r11, pc}
ENDP ;|vp8cx_horizontal_line_4_5_scale_c|
;/****************************************************************************
; *
; * ROUTINE : vertical_band_4_5_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 4 to 5. The
; * height of the band scaled is 4-pixels.
; *
; * SPECIAL NOTES : The routine uses the first line of the band below
; * the current band.
; *
; ****************************************************************************/
;void vertical_band_4_5_scale_armv4
;(
; r0 = UINT8 *dest
; r1 = UINT32 dest_pitch
; r2 = UINT32 dest_width
;)
|vertical_band_4_5_scale_armv4| PROC
stmdb sp!, {r4 - r11, lr}
ldr c51_205, =0x3300cd
ldr c102_154, =0x66009a
vl45_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
orr r6, r4, r5, lsl #16 ; b | a
mul r6, c51_205, r6 ; a * 51 + 205 * b
ldrb r8, [r3], r1 ; d = des[dest_pitch*3]
orr r5, r5, r7, lsl #16 ; c | b
mul r5, c102_154, r5 ; b * 102 + 154 * c
add r6, r6, #0x8000
orr r7, r8, r7, lsl #16 ; c | d
mov r6, r6, lsr #24
strb r6, [lr], r1
ldrb r9, [r3, r1] ; e = des [dest_pitch * 5]
mul r7, c102_154, r7 ; c * 154 + 102 * d
add r5, r5, #0x8000
orr r9, r9, r8, lsl #16 ; d | e
mov r5, r5, lsr #24
strb r5, [lr], r1
mul r9, c51_205, r9 ; d * 205 + 51 * e
add r7, r7, #0x8000
add src, src, #1
mov r7, r7, lsr #24
strb r7, [lr], r1
add r9, r9, #0x8000
subs r2, r2, #1
mov r9, r9, lsr #24
strb r9, [lr], r1
bne vl45_loop
ldmia sp!, {r4 - r11, pc}
ENDP ;|vertical_band_4_5_scale_armv4|
;/****************************************************************************
; *
; * ROUTINE : horizontal_line_2_3_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 2 to 3.
; *
; * SPECIAL NOTES : None.
; *
; *
; ****************************************************************************/
;void horizontal_line_2_3_scale_armv4
;(
; const unsigned char *source,
; unsigned int source_width,
; unsigned char *dest,
; unsigned int dest_width
;)
|horizontal_line_2_3_scale_armv4| PROC
stmdb sp!, {r4 - r11, lr}
ldr lr, =85
ldr r12, =171
hl23_loop
ldrb r3, [src], #1 ; a
ldrb r4, [src], #1 ; b
ldrb r5, [src] ; c
strb r3, [dest], #1
mul r4, r12, r4 ; b * 171
mla r6, lr, r3, r4 ; a * 85
mla r7, lr, r5, r4 ; c * 85
add r6, r6, #128
mov r6, r6, lsr #8
strb r6, [dest], #1
add r7, r7, #128
mov r7, r7, lsr #8
strb r7, [dest], #1
subs srcw, srcw, #2
bne hl23_loop
ldrb r4, [src, #1] ; b
strb r5, [dest], #1
strb r4, [dest, #1]
mul r4, r12, r4 ; b * 171
mla r6, lr, r5, r4 ; a * 85 + b *171
add r6, r6, #128
mov r6, r6, lsr #8
strb r6, [dest]
ldmia sp!, {r4 - r11, pc}
ENDP ;|horizontal_line_2_3_scale_armv4|
;/****************************************************************************
; *
; * ROUTINE : vertical_band_2_3_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 2 to 3. The
; * height of the band scaled is 2-pixels.
; *
; * SPECIAL NOTES : The routine uses the first line of the band below
; * the current band.
; *
; ****************************************************************************/
;void vertical_band_2_3_scale_armv4
;(
; r0 = UINT8 *dest
; r1 = UINT32 dest_pitch
; r2 = UINT32 dest_width
;)
|vertical_band_2_3_scale_armv4| PROC
stmdb sp!, {r4 - r8, lr}
ldr lr, =85
ldr r12, =171
add r3, r1, r1, lsl #1 ; 3 * dest_pitch
vl23_loop
ldrb r4, [src] ; a = des [0]
ldrb r5, [src, r1] ; b = des [dest_pitch]
ldrb r7, [src, r3] ; c = des [dest_pitch*3]
subs r2, r2, #1
mul r5, r12, r5 ; b * 171
mla r6, lr, r4, r5 ; a * 85
mla r8, lr, r7, r5 ; c * 85
add r6, r6, #128
mov r6, r6, lsr #8
strb r6, [src, r1]
add r8, r8, #128
mov r8, r8, lsr #8
strb r8, [src, r1, lsl #1]
add src, src, #1
bne vl23_loop
ldmia sp!, {r4 - r8, pc}
ENDP ;|vertical_band_2_3_scale_armv4|
;/****************************************************************************
; *
; * ROUTINE : vp8cx_horizontal_line_3_5_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 3 to 5.
; *
; * SPECIAL NOTES : None.
; *
; *
; ****************************************************************************/
;void vp8cx_horizontal_line_3_5_scale_c
;(
; const unsigned char *source,
; unsigned int source_width,
; unsigned char *dest,
; unsigned int dest_width
;)
|horizontal_line_3_5_scale_armv4| PROC
stmdb sp!, {r4 - r11, lr}
ldr c51_205, =0x3300cd
ldr c102_154, =0x66009a
ldrb r4, [src], #1 ; a = src[0]
hl35_loop
ldrb r8, [src], #1 ; b = src[1]
strb r4, [dest], #1
orr r6, r4, r8, lsl #16 ; b | a
ldrb r9, [src], #1 ; c = src[2]
mul r6, c102_154, r6 ; a * 102 + 154 * b
orr r5, r9, r8, lsl #16 ; b | c
mul r5, c51_205, r5 ; b * 205 + 51 * c
add r6, r6, #0x8000
ldrb r4, [src], #1 ; d = src[3]
mov r6, r6, lsr #24
strb r6, [dest], #1
orr r7, r8, r9, lsl #16 ; c | b
mul r7, c51_205, r7 ; c * 205 + 154 * b
add r5, r5, #0x8000
mov r5, r5, lsr #24
strb r5, [dest], #1
orr r9, r4, r9, lsl #16 ; c | d
mul r9, c102_154, r9 ; c * 154 + 102 * d
add r7, r7, #0x8000
mov r7, r7, lsr #24
strb r7, [dest], #1
add r9, r9, #0x8000
subs srcw, srcw, #3
mov r9, r9, lsr #24
strb r9, [dest], #1
bpl hl35_loop
ldrb r5, [src], #1 ; b = src[1]
strb r4, [dest], #1
orr r6, r4, r8, lsl #16 ; b | a
ldrb r9, [src], #1 ; c = src[2]
mul r6, c102_154, r6 ; a * 102 + 154 * b
orr r5, r9, r8, lsl #16 ; b | c
mul r5, c51_205, r5 ; b * 205 + 51 * c
add r6, r6, #0x8000
mov r6, r6, lsr #24
strb r6, [dest], #1
orr r7, r8, r9, lsl #16 ; c | b
mul r7, c51_205, r7 ; c * 205 + 154 * b
add r5, r5, #0x8000
mov r5, r5, lsr #24
strb r5, [dest], #1
add r7, r7, #0x8000
mov r7, r7, lsr #24
strb r7, [dest], #1
strb r9, [dest], #1
ldmia sp!, {r4 - r11, pc}
ENDP ;|vp8cx_horizontal_line_3_5_scale_c|
;/****************************************************************************
; *
; * ROUTINE : vp8cx_vertical_band_3_5_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 3 to 5. 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_4_5_scale_armv4
;(
; r0 = UINT8 *dest
; r1 = UINT32 dest_pitch
; r2 = UINT32 dest_width
;)
|vertical_band_3_5_scale_armv4| PROC
stmdb sp!, {r4 - r11, lr}
ldr c51_205, =0x3300cd
ldr c102_154, =0x66009a
vl35_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
orr r8, r4, r5, lsl #16 ; b | a
mul r6, c102_154, r8 ; a * 102 + 154 * b
ldrb r8, [r3, r1, lsl #1] ; d = des[dest_pitch*5]
orr r3, r7, r5, lsl #16 ; b | c
mul r9, c51_205, r3 ; b * 205 + 51 * c
add r6, r6, #0x8000
orr r3, r5, r7, lsl #16 ; c | b
mov r6, r6, lsr #24
strb r6, [lr], r1
mul r5, c51_205, r3 ; c * 205 + 154 * b
add r9, r9, #0x8000
orr r3, r8, r7, lsl #16 ; c | d
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
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