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neon_scale2x.S
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@@
@@ Copyright (C) 2012 Roman Pauer
@@
@@ Permission is hereby granted, free of charge, to any person obtaining a copy of
@@ this software and associated documentation files (the "Software"), to deal in
@@ the Software without restriction, including without limitation the rights to
@@ use, copy, modify, merge, publish, distribute, sublicense, and/or sell copies
@@ of the Software, and to permit persons to whom the Software is furnished to do
@@ so, subject to the following conditions:
@@
@@ The above copyright notice and this permission notice shall be included in all
@@ copies or substantial portions of the Software.
@@
@@ THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
@@ IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
@@ FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
@@ AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
@@ LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
@@ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
@@ SOFTWARE.
@@
.arm
.include "neon_scale2x.Sinc"
.include "neon_normalxx.Sinc"
.global neon_scale2x_8_8
.global neon_scale2x_16_16
.global neon_scale2x_8_16
.align 4
neon_scale2x_8_8:
@ r0 = const uint8_t *src
@ r1 = uint8_t *dst
@ r2 = unsigned int width (pixels)
@ r3 = unsigned int srcstride (bytes)
@ [sp] = unsigned int dststride (bytes)
@ [sp+4] = unsigned int height
@ lr = return address
ldr ip, [sp] @ ip = dststride
push {r4-r9}
ldr r9, [sp, #(7*4)] @ r9 = height
sub r4, r0, r3 @ r4 = src - srcstride
add r5, r0, r3 @ r5 = src + srcstride
add r6, r1, ip @ r6 = dst + dststride
sub r3, r3, r2 @ r3 = srcstride - width
sub ip, ip, r2 @ ip = dststride - width
lsl ip, #1 @ ip = 2 * dststride - 2 * width
mov r7, r2 @ r7 = width
sub r9, r9, #2 @ r9 = height - 2
@ r0 = src
@ r1 = dst
@ r2 = width
@ r3 = srcdiff (srcstride - width)
@ r4 = src - srcstride
@ r5 = src + srcstride
@ r6 = dst + dststride
@ r7 = counter
@ r8 = tmpreg
@ r9 = height
@ ip = dstdiff (2 * dststride - 2 * width)
@ first line
neon_scale2x_8_8_line first, r4, r0, r5, r7, r1, r6, r8, 0, 0
add r0, r0, r3
add r4, r4, r3
add r5, r5, r3
add r1, r1, ip
add r6, r6, ip
@ middle lines
101:
mov r7, r2
neon_scale2x_8_8_line middle, r4, r0, r5, r7, r1, r6, r8, 0, 0
subS r9, r9, #1
add r0, r0, r3
add r4, r4, r3
add r5, r5, r3
add r1, r1, ip
add r6, r6, ip
bne 101b
@ last line
mov r7, r2
neon_scale2x_8_8_line last, r4, r0, r5, r7, r1, r6, r8, 0, 0
pop {r4-r9}
bx lr
@ end procedure neon_scale2x_8_8
neon_scale2x_16_16:
@ r0 = const uint16_t *src
@ r1 = uint16_t *dst
@ r2 = unsigned int width (pixels)
@ r3 = unsigned int srcstride (bytes)
@ [sp] = unsigned int dststride (bytes)
@ [sp+4] = unsigned int height
@ lr = return address
ldr ip, [sp] @ ip = dststride
push {r4-r9}
ldr r9, [sp, #(7*4)] @ r9 = height
sub r4, r0, r3 @ r4 = src - srcstride
add r5, r0, r3 @ r5 = src + srcstride
add r6, r1, ip @ r6 = dst + dststride
sub r3, r3, r2, lsl #1 @ r3 = srcstride - 2 * width
sub ip, ip, r2, lsl #1 @ ip = dststride - 2 * width
lsl ip, #1 @ ip = 2 * dststride - 4 * width
mov r7, r2 @ r7 = width
sub r9, r9, #2 @ r9 = height - 2
@ r0 = src
@ r1 = dst
@ r2 = width
@ r3 = srcdiff (srcstride - 2 * width)
@ r4 = src - srcstride
@ r5 = src + srcstride
@ r6 = dst + dststride
@ r7 = counter
@ r8 = tmpreg
@ r9 = height
@ ip = dstdiff (2 * dststride - 4 * width)
@ first line
neon_scale2x_16_16_line first, r4, r0, r5, r7, r1, r6, r8, 0, 0
add r0, r0, r3
add r4, r4, r3
add r5, r5, r3
add r1, r1, ip
add r6, r6, ip
@ middle lines
101:
mov r7, r2
neon_scale2x_16_16_line middle, r4, r0, r5, r7, r1, r6, r8, 0, 0
subS r9, r9, #1
add r0, r0, r3
add r4, r4, r3
add r5, r5, r3
add r1, r1, ip
add r6, r6, ip
bne 101b
@ last line
mov r7, r2
neon_scale2x_16_16_line last, r4, r0, r5, r7, r1, r6, r8, 0, 0
pop {r4-r9}
bx lr
@ end procedure neon_scale2x_16_16
neon_scale2x_8_16:
@ r0 = const uint8_t *src
@ r1 = uint8_t *dst
@ r2 = const uint32_t *palette
@ r3 = unsigned int width (pixels)
@ [sp] = unsigned int srcstride (bytes)
@ [sp+4] = unsigned int dststride (bytes)
@ [sp+8] = unsigned int height
@ lr = return address
@ three temporary lines
ldr ip, [sp] @ ip = srcstride
push {r4-r11,lr}
ldr r4, [sp, #(4*10)] @ r4 = dststride
ldr r5, [sp, #(4*11)] @ r5 = height
mov r6, sp @ r6 = sp
sub ip, ip, r3 @ ip = srcstride - width
bic sp, sp, #31 @ align sp to 32 bytes
sub r7, r4, r3, lsl #1 @ r7 = dststride - 2 * width
sub sp, sp, r3, lsl #1 @ sp -= 2 * width
sub r5, r5, #2 @ height -= 2
mov r10, sp @ tmpline3 = sp
lsl r7, #1 @ r7 = 2 * dststride - 4 * width
bic sp, sp, #31 @ align sp to 32 bytes
sub sp, sp, r3, lsl #1 @ sp -= 2 * width
mov r11, sp @ tmpline2 = sp
bic sp, sp, #31 @ align sp to 32 bytes
sub sp, sp, r3, lsl #1 @ sp -= 2 * width
mov lr, sp @ tmpline1 = sp
bic sp, sp, #31 @ align sp to 32 bytes
sub sp, sp, #36
str r6, [sp] @ oldsp = r6
str r5, [sp, #4] @ height = r5
str ip, [sp, #8] @ srcdiff = ip
str r7, [sp, #12] @ dstdiff = r7
str r4, [sp, #16] @ dststride = r4
str lr, [sp, #20] @ tmpline1 = lr
str r11, [sp, #24] @ tmpline2 = r11
str r10, [sp, #28] @ tmpline3 = r10
str r3, [sp, #32] @ width = r3
@ r0 = src
@ r1 = dst
@ r2 = palette
@ r3 = counter
@ r4 = dst2
@ r11 = bufptr1
@ ip = bufptr2
@ lr = bufptr3
@ [sp] = oldsp
@ [sp, #4] = height
@ [sp, #8] = srcdiff (srcstride - width)
@ [sp, #12] = dstdiff (2 * dststride - 4 * width)
@ [sp, #16] = dststride
@ [sp, #20] = tmpline1
@ [sp, #24] = tmpline2
@ [sp, #28] = tmpline3
@ [sp, #32] = width
@ lr = tmpline1
@ r3 = counter
@ first line
neon_normal1x_8_16_line r0, lr, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, ip
ldr r7, [sp, #8] @ r7 = srcdiff
ldr r3, [sp, #32] @ counter = width
ldr lr, [sp, #24] @ bufptr3 = tmpline2
add r0, r0, r7 @ src += srcdiff
@ second line
neon_normal1x_8_16_line r0, lr, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, ip
ldr r9, [sp, #16] @ r9 = dststride
ldr r3, [sp, #32] @ counter = width
ldr ip, [sp, #20] @ bufptr2 = tmpline1
ldr lr, [sp, #24] @ bufptr3 = tmpline2
add r4, r1, r9 @ dst2 = dst + dststride
@ first temporary line
neon_scale2x_16_16_line first, r11, ip, lr, r3, r1, r4, r5, 1, 0
ldr r7, [sp, #8] @ r7 = srcdiff
ldr r8, [sp, #12] @ r8 = dstdiff
ldr r3, [sp, #32] @ counter = width
ldr lr, [sp, #28] @ bufptr3 = tmpline3
add r0, r0, r7 @ src += srcdiff
add r1, r1, r8 @ dst += dstdiff
100:
@ line n+1
neon_normal1x_8_16_line r0, lr, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11, ip
ldr r9, [sp, #16] @ r9 = dststride
ldr r11, [sp, #20] @ bufptr1 = tmpline1
ldr ip, [sp, #24] @ bufptr2 = tmpline2
ldr lr, [sp, #28] @ bufptr3 = tmpline3
add r4, r1, r9 @ dst2 = dst + dststride
ldr r3, [sp, #32] @ counter = width
str r11, [sp, #28] @ tmpline3 = bufptr1
str ip, [sp, #20] @ tmpline1 = bufptr2
str lr, [sp, #24] @ tmpline2 = bufptr3
@ temporary line n
neon_scale2x_16_16_line middle, r11, ip, lr, r3, r1, r4, r5, 1, 0
ldr r6, [sp, #4] @ r6 = height
ldr r7, [sp, #8] @ r7 = srcdiff
ldr r8, [sp, #12] @ r8 = dstdiff
ldr r3, [sp, #32] @ counter = width
subS r6, r6, #1 @ height--
ldr lr, [sp, #28] @ bufptr3 = tmpline3
add r0, r0, r7 @ src += srcdiff
add r1, r1, r8 @ dst += dstdiff
str r6, [sp, #4] @ height = r6
bne 100b
ldr r9, [sp, #16] @ r9 = dststride
ldr r11, [sp, #20] @ bufptr1 = tmpline1
ldr ip, [sp, #24] @ bufptr2 = tmpline2
add r4, r1, r9 @ dst2 = dst + dststride
@ last temporary line
neon_scale2x_16_16_line last, r11, ip, lr, r3, r1, r4, r5, 1, 0
ldr sp, [sp] @ sp = oldsp
pop {r4-r11,lr}
bx lr
@ end procedure neon_scale2x_8_16