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ARM: replace jump tables with conditional branches

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Originally committed as revision 16822 to svn://svn.ffmpeg.org/ffmpeg/trunk
pull/126/head
Måns Rullgård 16 years ago
parent d9e68f5c1a
commit 00c5727d90
1 changed files with 19 additions and 81 deletions
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  1. 100
      libavcodec/arm/dsputil_arm_s.S

100
libavcodec/arm/dsputil_arm_s.S
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@ -90,6 +90,17 @@ function ff_prefetch_arm, export=1
add \Rd1, \Rn1, \Rd1, lsr #1
.endm
.macro JMP_ALIGN tmp, reg, label1, label2, label3
ands \tmp, \reg, #3
bic \reg, \reg, #3
beq 1f
subs \tmp, \tmp, #1
beq 2f
subs \tmp, \tmp, #1
beq 3f
b 4f
.endm
@ ----------------------------------------------------------------
.align 5
function put_pixels16_arm, export=1
@ -97,11 +108,7 @@ function put_pixels16_arm, export=1
@ 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]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
ldmia r1, {r4-r7}
add r1, r1, r2
@ -144,11 +151,6 @@ function put_pixels16_arm, export=1
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r11,pc}
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
@ ----------------------------------------------------------------
@ -158,11 +160,7 @@ function put_pixels8_arm, export=1
@ 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]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
ldmia r1, {r4-r5}
add r1, r1, r2
@ -205,11 +203,6 @@ function put_pixels8_arm, export=1
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r5,pc}
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
@ ----------------------------------------------------------------
@ -219,12 +212,8 @@ function put_pixels8_x2_arm, export=1
@ 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, =0xfefefefe
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
@ -274,11 +263,6 @@ function put_pixels8_x2_arm, export=1
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r10,pc} @@ update PC with LR content.
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
.align 5
@ -287,12 +271,8 @@ function put_no_rnd_pixels8_x2_arm, export=1
@ 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, =0xfefefefe
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
ldmia r1, {r4-r5, r10}
add r1, r1, r2
@ -342,11 +322,6 @@ function put_no_rnd_pixels8_x2_arm, export=1
add r0, r0, r2
bne 4b
ldmfd sp!, {r4-r10,pc} @@ update PC with LR content.
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
@ -357,13 +332,9 @@ function put_pixels8_y2_arm, export=1
@ 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, =0xfefefefe
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
ldmia r1, {r4-r5}
add r1, r1, r2
@ -451,12 +422,6 @@ function put_pixels8_y2_arm, export=1
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
.align 5
@ -465,13 +430,9 @@ function put_no_rnd_pixels8_y2_arm, export=1
@ 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, =0xfefefefe
add r5, r5, r4, lsl #2
bic r1, r1, #3
ldrne pc, [r5]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
ldmia r1, {r4-r5}
add r1, r1, r2
@ -559,11 +520,6 @@ function put_no_rnd_pixels8_y2_arm, export=1
add r0, r0, r2
bne 6b
ldmfd sp!, {r4-r11,pc}
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
.ltorg
@ -639,11 +595,7 @@ function put_pixels8_xy2_arm, export=1
@ 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]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
RND_XY2_EXPAND 0, lsl
@ -658,11 +610,6 @@ function put_pixels8_xy2_arm, export=1
.align 5
4:
RND_XY2_EXPAND 3, lsl
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
.align 5
@ -671,11 +618,7 @@ function put_no_rnd_pixels8_xy2_arm, export=1
@ 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]
JMP_ALIGN r5, r1, 2f, 3f, 4f
1:
RND_XY2_EXPAND 0, lsr
@ -690,11 +633,6 @@ function put_no_rnd_pixels8_xy2_arm, export=1
.align 5
4:
RND_XY2_EXPAND 3, lsr
5:
.word 1b
.word 2b
.word 3b
.word 4b
.endfunc
.align 5

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