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csky: fixup remove vdsp implement for kernel.

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The vr regs for vdsp only saved in task_switch not in every
exception trap-in. The memcpy with vdsp instructions will
destroy the vr regs for user space applications.

Signed-off-by: Guo Ren <ren_guo@c-sky.com>
This commit is contained in:
Guo Ren 2018-12-31 01:19:29 +08:00
parent 2054f4af19
commit 35ff802af1
1 changed files with 1 additions and 7 deletions
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8
arch/csky/abiv2/memcpy.S
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@ -27,13 +27,7 @@ ENTRY(memcpy)
LABLE_ALIGN LABLE_ALIGN
.L_len_larger_16bytes: .L_len_larger_16bytes:
#if defined(__CSKY_VDSPV2__) #if defined(__CK860__)
vldx.8 vr0, (r1), r19
PRE_BNEZAD (r18)
addi r1, 16
vstx.8 vr0, (r0), r19
addi r0, 16
#elif defined(__CK860__)
ldw r3, (r1, 0) ldw r3, (r1, 0)
stw r3, (r0, 0) stw r3, (r0, 0)
ldw r3, (r1, 4) ldw r3, (r1, 4)