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arm: hpeldsp: prevent overreads in armv6 asm

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Based on a patch by Russel King <rmk+libav@arm.linux.org.uk>

Bug-Id: 646
CC: libav-stable@libav.org
(cherry picked from commit cbddee1cca)
This commit is contained in:
Janne Grunau
2014-03-05 12:44:57 +01:00
committed by Reinhard Tartler
parent ff79f6b35a
commit 40ffa99dfa
1 changed files with 6 additions and 4 deletions
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10
libavcodec/arm/hpeldsp_armv6.S
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@@ -132,11 +132,12 @@ function ff_put_pixels8_y2_armv6, export=1
uhadd8 r9, r5, r7
eor r11, r5, r7
and r10, r10, r12
ldr_pre r4, r1, r2
ldrc_pre ne, r4, r1, r2
uadd8 r8, r8, r10
and r11, r11, r12
uadd8 r9, r9, r11
ldr r5, [r1, #4]
it ne
ldrne r5, [r1, #4]
uhadd8 r10, r4, r6
eor r6, r4, r6
uhadd8 r11, r5, r7
@@ -193,9 +194,10 @@ function ff_put_pixels8_y2_no_rnd_armv6, export=1
1:
subs r3, r3, #2
uhadd8 r8, r4, r6
ldr_pre r4, r1, r2
ldrc_pre ne, r4, r1, r2
uhadd8 r9, r5, r7
ldr r5, [r1, #4]
it ne
ldrne r5, [r1, #4]
uhadd8 r12, r4, r6
ldrc_pre ne, r6, r1, r2
uhadd8 r14, r5, r7