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FFmpeg/libavcodec/armv4l/dsputil_arm_s.S
Matthieu Castet b4e806b2b9 pld instruction are used in libavcodec/armv4l/dsputil_arm_s.S which can be used
on armv4 that doesn't support this instruction. Futhermore pld is a nop on some
armv5 processor like arm926. Detect if pld is supported and have the
preprocessor remove it when it's not supported.
Fixes issue 393.
patch by matthieu castet, castet.matthieu free fr

Originally committed as revision 12569 to svn://svn.ffmpeg.org/ffmpeg/trunk
2008-03-24 11:49:59 +00:00

698 lines
18 KiB
ArmAsm

@
@ ARMv4L optimized DSP utils
@ Copyright (c) 2004 AGAWA Koji <i (AT) atty (DOT) jp>
@
@ This file is part of FFmpeg.
@
@ FFmpeg is free software; you can redistribute it and/or
@ modify it under the terms of the GNU Lesser General Public
@ License as published by the Free Software Foundation; either
@ version 2.1 of the License, or (at your option) any later version.
@
@ FFmpeg 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
@ Lesser General Public License for more details.
@
@ You should have received a copy of the GNU Lesser General Public
@ License along with FFmpeg; if not, write to the Free Software
@ Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
@
#include "config.h"
#ifndef HAVE_PLD
.macro pld reg
.endm
#endif
.macro ADJ_ALIGN_QUADWORD_D shift, Rd0, Rd1, Rd2, Rd3, Rn0, Rn1, Rn2, Rn3, Rn4
mov \Rd0, \Rn0, lsr #(\shift * 8)
mov \Rd1, \Rn1, lsr #(\shift * 8)
mov \Rd2, \Rn2, lsr #(\shift * 8)
mov \Rd3, \Rn3, lsr #(\shift * 8)
orr \Rd0, \Rd0, \Rn1, lsl #(32 - \shift * 8)
orr \Rd1, \Rd1, \Rn2, lsl #(32 - \shift * 8)
orr \Rd2, \Rd2, \Rn3, lsl #(32 - \shift * 8)
orr \Rd3, \Rd3, \Rn4, lsl #(32 - \shift * 8)
.endm
.macro ADJ_ALIGN_DOUBLEWORD shift, R0, R1, R2
mov \R0, \R0, lsr #(\shift * 8)
orr \R0, \R0, \R1, lsl #(32 - \shift * 8)
mov \R1, \R1, lsr #(\shift * 8)
orr \R1, \R1, \R2, lsl #(32 - \shift * 8)
.endm
.macro ADJ_ALIGN_DOUBLEWORD_D shift, Rdst0, Rdst1, Rsrc0, Rsrc1, Rsrc2
mov \Rdst0, \Rsrc0, lsr #(\shift * 8)
mov \Rdst1, \Rsrc1, lsr #(\shift * 8)
orr \Rdst0, \Rdst0, \Rsrc1, lsl #(32 - (\shift * 8))
orr \Rdst1, \Rdst1, \Rsrc2, lsl #(32 - (\shift * 8))
.endm
.macro RND_AVG32 Rd0, Rd1, Rn0, Rn1, Rm0, Rm1, Rmask
@ Rd = (Rn | Rm) - (((Rn ^ Rm) & ~0x01010101) >> 1)
@ Rmask = 0xFEFEFEFE
@ Rn = destroy
eor \Rd0, \Rn0, \Rm0
eor \Rd1, \Rn1, \Rm1
orr \Rn0, \Rn0, \Rm0
orr \Rn1, \Rn1, \Rm1
and \Rd0, \Rd0, \Rmask
and \Rd1, \Rd1, \Rmask
sub \Rd0, \Rn0, \Rd0, lsr #1
sub \Rd1, \Rn1, \Rd1, lsr #1
.endm
.macro NO_RND_AVG32 Rd0, Rd1, Rn0, Rn1, Rm0, Rm1, Rmask
@ Rd = (Rn & Rm) - (((Rn ^ Rm) & ~0x01010101) >> 1)
@ Rmask = 0xFEFEFEFE
@ Rn = destroy
eor \Rd0, \Rn0, \Rm0
eor \Rd1, \Rn1, \Rm1
and \Rn0, \Rn0, \Rm0
and \Rn1, \Rn1, \Rm1
and \Rd0, \Rd0, \Rmask
and \Rd1, \Rd1, \Rmask
add \Rd0, \Rn0, \Rd0, lsr #1
add \Rd1, \Rn1, \Rd1, lsr #1
.endm
@ ----------------------------------------------------------------
.align 8
.global put_pixels16_arm
put_pixels16_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r11, lr} @ R14 is also called LR
adr r5, 5f
ands r4, r1, #3
bic r1, r1, #3
add r5, r5, r4, lsl #2
ldrne pc, [r5]
1:
ldmia r1, {r4-r7}
add r1, r1, r2
stmia r0, {r4-r7}
pld [r1]
subs r3, r3, #1
add r0, r0, r2
bne 1b
ldmfd sp!, {r4-r11, pc}
.align 8
2:
ldmia r1, {r4-r8}
add r1, r1, r2
ADJ_ALIGN_QUADWORD_D 1, r9, r10, r11, r12, r4, r5, r6, r7, r8
pld [r1]
subs r3, r3, #1
stmia r0, {r9-r12}
add r0, r0, r2
bne 2b
ldmfd sp!, {r4-r11, pc}
.align 8
3:
ldmia r1, {r4-r8}
add r1, r1, r2
ADJ_ALIGN_QUADWORD_D 2, r9, r10, r11, r12, r4, r5, r6, r7, r8
pld [r1]
subs r3, r3, #1
stmia r0, {r9-r12}
add r0, r0, r2
bne 3b
ldmfd sp!, {r4-r11, pc}
.align 8
4:
ldmia r1, {r4-r8}
add r1, r1, r2
ADJ_ALIGN_QUADWORD_D 3, r9, r10, r11, r12, r4, r5, r6, r7, r8
pld [r1]
subs r3, r3, #1
stmia r0, {r9-r12}
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r11,pc}
.align 8
5:
.word 1b
.word 2b
.word 3b
.word 4b
@ ----------------------------------------------------------------
.align 8
.global put_pixels8_arm
put_pixels8_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r5,lr} @ R14 is also called LR
adr r5, 5f
ands r4, r1, #3
bic r1, r1, #3
add r5, r5, r4, lsl #2
ldrne pc, [r5]
1:
ldmia r1, {r4-r5}
add r1, r1, r2
subs r3, r3, #1
pld [r1]
stmia r0, {r4-r5}
add r0, r0, r2
bne 1b
ldmfd sp!, {r4-r5,pc}
.align 8
2:
ldmia r1, {r4-r5, r12}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD 1, r4, r5, r12
pld [r1]
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 2b
ldmfd sp!, {r4-r5,pc}
.align 8
3:
ldmia r1, {r4-r5, r12}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD 2, r4, r5, r12
pld [r1]
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 3b
ldmfd sp!, {r4-r5,pc}
.align 8
4:
ldmia r1, {r4-r5, r12}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD 3, r4, r5, r12
pld [r1]
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r5,pc}
.align 8
5:
.word 1b
.word 2b
.word 3b
.word 4b
@ ----------------------------------------------------------------
.align 8
.global put_pixels8_x2_arm
put_pixels8_x2_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r10,lr} @ R14 is also called LR
adr r5, 5f
ands r4, r1, #3
ldr r12, [r5]
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
1:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 1, r6, r7, r4, r5, r10
pld [r1]
RND_AVG32 r8, r9, r4, r5, r6, r7, r12
subs r3, r3, #1
stmia r0, {r8-r9}
add r0, r0, r2
bne 1b
ldmfd sp!, {r4-r10,pc}
.align 8
2:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 1, r6, r7, r4, r5, r10
ADJ_ALIGN_DOUBLEWORD_D 2, r8, r9, r4, r5, r10
pld [r1]
RND_AVG32 r4, r5, r6, r7, r8, r9, r12
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 2b
ldmfd sp!, {r4-r10,pc}
.align 8
3:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 2, r6, r7, r4, r5, r10
ADJ_ALIGN_DOUBLEWORD_D 3, r8, r9, r4, r5, r10
pld [r1]
RND_AVG32 r4, r5, r6, r7, r8, r9, r12
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 3b
ldmfd sp!, {r4-r10,pc}
.align 8
4:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 3, r6, r7, r4, r5, r10
pld [r1]
RND_AVG32 r8, r9, r6, r7, r5, r10, r12
subs r3, r3, #1
stmia r0, {r8-r9}
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r10,pc} @@ update PC with LR content.
.align 8
5:
.word 0xFEFEFEFE
.word 2b
.word 3b
.word 4b
.align 8
.global put_no_rnd_pixels8_x2_arm
put_no_rnd_pixels8_x2_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r10,lr} @ R14 is also called LR
adr r5, 5f
ands r4, r1, #3
ldr r12, [r5]
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
1:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 1, r6, r7, r4, r5, r10
pld [r1]
NO_RND_AVG32 r8, r9, r4, r5, r6, r7, r12
subs r3, r3, #1
stmia r0, {r8-r9}
add r0, r0, r2
bne 1b
ldmfd sp!, {r4-r10,pc}
.align 8
2:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 1, r6, r7, r4, r5, r10
ADJ_ALIGN_DOUBLEWORD_D 2, r8, r9, r4, r5, r10
pld [r1]
NO_RND_AVG32 r4, r5, r6, r7, r8, r9, r12
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 2b
ldmfd sp!, {r4-r10,pc}
.align 8
3:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 2, r6, r7, r4, r5, r10
ADJ_ALIGN_DOUBLEWORD_D 3, r8, r9, r4, r5, r10
pld [r1]
NO_RND_AVG32 r4, r5, r6, r7, r8, r9, r12
subs r3, r3, #1
stmia r0, {r4-r5}
add r0, r0, r2
bne 3b
ldmfd sp!, {r4-r10,pc}
.align 8
4:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
ADJ_ALIGN_DOUBLEWORD_D 3, r6, r7, r4, r5, r10
pld [r1]
NO_RND_AVG32 r8, r9, r6, r7, r5, r10, r12
subs r3, r3, #1
stmia r0, {r8-r9}
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r10,pc} @@ update PC with LR content.
.align 8
5:
.word 0xFEFEFEFE
.word 2b
.word 3b
.word 4b
@ ----------------------------------------------------------------
.align 8
.global put_pixels8_y2_arm
put_pixels8_y2_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r11,lr} @ R14 is also called LR
adr r5, 5f
ands r4, r1, #3
mov r3, r3, lsr #1
ldr r12, [r5]
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
1:
ldmia r1, {r4-r5}
add r1, r1, r2
6: ldmia r1, {r6-r7}
add r1, r1, r2
pld [r1]
RND_AVG32 r8, r9, r4, r5, r6, r7, r12
ldmia r1, {r4-r5}
add r1, r1, r2
stmia r0, {r8-r9}
add r0, r0, r2
pld [r1]
RND_AVG32 r8, r9, r6, r7, r4, r5, r12
subs r3, r3, #1
stmia r0, {r8-r9}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
2:
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 1, r4, r5, r6
6: ldmia r1, {r7-r9}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 1, r7, r8, r9
RND_AVG32 r10, r11, r4, r5, r7, r8, r12
stmia r0, {r10-r11}
add r0, r0, r2
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 1, r4, r5, r6
subs r3, r3, #1
RND_AVG32 r10, r11, r7, r8, r4, r5, r12
stmia r0, {r10-r11}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
3:
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 2, r4, r5, r6
6: ldmia r1, {r7-r9}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 2, r7, r8, r9
RND_AVG32 r10, r11, r4, r5, r7, r8, r12
stmia r0, {r10-r11}
add r0, r0, r2
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 2, r4, r5, r6
subs r3, r3, #1
RND_AVG32 r10, r11, r7, r8, r4, r5, r12
stmia r0, {r10-r11}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
4:
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 3, r4, r5, r6
6: ldmia r1, {r7-r9}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 3, r7, r8, r9
RND_AVG32 r10, r11, r4, r5, r7, r8, r12
stmia r0, {r10-r11}
add r0, r0, r2
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 3, r4, r5, r6
subs r3, r3, #1
RND_AVG32 r10, r11, r7, r8, r4, r5, r12
stmia r0, {r10-r11}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
5:
.word 0xFEFEFEFE
.word 2b
.word 3b
.word 4b
.align 8
.global put_no_rnd_pixels8_y2_arm
put_no_rnd_pixels8_y2_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r11,lr} @ R14 is also called LR
adr r5, 5f
ands r4, r1, #3
mov r3, r3, lsr #1
ldr r12, [r5]
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
1:
ldmia r1, {r4-r5}
add r1, r1, r2
6: ldmia r1, {r6-r7}
add r1, r1, r2
pld [r1]
NO_RND_AVG32 r8, r9, r4, r5, r6, r7, r12
ldmia r1, {r4-r5}
add r1, r1, r2
stmia r0, {r8-r9}
add r0, r0, r2
pld [r1]
NO_RND_AVG32 r8, r9, r6, r7, r4, r5, r12
subs r3, r3, #1
stmia r0, {r8-r9}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
2:
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 1, r4, r5, r6
6: ldmia r1, {r7-r9}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 1, r7, r8, r9
NO_RND_AVG32 r10, r11, r4, r5, r7, r8, r12
stmia r0, {r10-r11}
add r0, r0, r2
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 1, r4, r5, r6
subs r3, r3, #1
NO_RND_AVG32 r10, r11, r7, r8, r4, r5, r12
stmia r0, {r10-r11}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
3:
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 2, r4, r5, r6
6: ldmia r1, {r7-r9}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 2, r7, r8, r9
NO_RND_AVG32 r10, r11, r4, r5, r7, r8, r12
stmia r0, {r10-r11}
add r0, r0, r2
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 2, r4, r5, r6
subs r3, r3, #1
NO_RND_AVG32 r10, r11, r7, r8, r4, r5, r12
stmia r0, {r10-r11}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
4:
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 3, r4, r5, r6
6: ldmia r1, {r7-r9}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 3, r7, r8, r9
NO_RND_AVG32 r10, r11, r4, r5, r7, r8, r12
stmia r0, {r10-r11}
add r0, r0, r2
ldmia r1, {r4-r6}
add r1, r1, r2
pld [r1]
ADJ_ALIGN_DOUBLEWORD 3, r4, r5, r6
subs r3, r3, #1
NO_RND_AVG32 r10, r11, r7, r8, r4, r5, r12
stmia r0, {r10-r11}
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
.align 8
5:
.word 0xFEFEFEFE
.word 2b
.word 3b
.word 4b
@ ----------------------------------------------------------------
.macro RND_XY2_IT align
@ l1= (a & 0x03030303) + (b & 0x03030303) ?(+ 0x02020202)
@ h1= ((a & 0xFCFCFCFCUL) >> 2) + ((b & 0xFCFCFCFCUL) >> 2)
.if \align == 0
ldmia r1, {r6-r8}
.elseif \align == 3
ldmia r1, {r5-r7}
.else
ldmia r1, {r8-r10}
.endif
add r1, r1, r2
pld [r1]
.if \align == 0
ADJ_ALIGN_DOUBLEWORD_D 1, r4, r5, r6, r7, r8
.elseif \align == 1
ADJ_ALIGN_DOUBLEWORD_D 1, r4, r5, r8, r9, r10
ADJ_ALIGN_DOUBLEWORD_D 2, r6, r7, r8, r9, r10
.elseif \align == 2
ADJ_ALIGN_DOUBLEWORD_D 2, r4, r5, r8, r9, r10
ADJ_ALIGN_DOUBLEWORD_D 3, r6, r7, r8, r9, r10
.elseif \align == 3
ADJ_ALIGN_DOUBLEWORD_D 3, r4, r5, r5, r6, r7
.endif
ldr r14, [r12, #0] @ 0x03030303
tst r3, #1
and r8, r4, r14
and r9, r5, r14
and r10, r6, r14
and r11, r7, r14
ldreq r14, [r12, #16] @ 0x02020202/0x01010101
add r8, r8, r10
add r9, r9, r11
addeq r8, r8, r14
addeq r9, r9, r14
ldr r14, [r12, #20] @ 0xFCFCFCFC >> 2
and r4, r14, r4, lsr #2
and r5, r14, r5, lsr #2
and r6, r14, r6, lsr #2
and r7, r14, r7, lsr #2
add r10, r4, r6
add r11, r5, r7
subs r3, r3, #1
.endm
.macro RND_XY2_EXPAND align
RND_XY2_IT \align
6: stmfd sp!, {r8-r11}
RND_XY2_IT \align
ldmfd sp!, {r4-r7}
add r4, r4, r8
add r5, r5, r9
add r6, r6, r10
add r7, r7, r11
ldr r14, [r12, #24] @ 0x0F0F0F0F
and r4, r14, r4, lsr #2
and r5, r14, r5, lsr #2
add r4, r4, r6
add r5, r5, r7
stmia r0, {r4-r5}
add r0, r0, r2
bge 6b
ldmfd sp!, {r4-r11,pc}
.endm
.align 8
.global put_pixels8_xy2_arm
put_pixels8_xy2_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r11,lr} @ R14 is also called LR
adrl r12, 5f
ands r4, r1, #3
add r5, r12, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
1:
RND_XY2_EXPAND 0
.align 8
2:
RND_XY2_EXPAND 1
.align 8
3:
RND_XY2_EXPAND 2
.align 8
4:
RND_XY2_EXPAND 3
5:
.word 0x03030303
.word 2b
.word 3b
.word 4b
.word 0x02020202
.word 0xFCFCFCFC >> 2
.word 0x0F0F0F0F
.align 8
.global put_no_rnd_pixels8_xy2_arm
put_no_rnd_pixels8_xy2_arm:
@ void func(uint8_t *block, const uint8_t *pixels, int line_size, int h)
@ block = word aligned, pixles = unaligned
pld [r1]
stmfd sp!, {r4-r11,lr} @ R14 is also called LR
adrl r12, 5f
ands r4, r1, #3
add r5, r12, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
1:
RND_XY2_EXPAND 0
.align 8
2:
RND_XY2_EXPAND 1
.align 8
3:
RND_XY2_EXPAND 2
.align 8
4:
RND_XY2_EXPAND 3
5:
.word 0x03030303
.word 2b
.word 3b
.word 4b
.word 0x01010101
.word 0xFCFCFCFC >> 2
.word 0x0F0F0F0F