RealView Compilation Tools アセンブラガイド - ARM Information Center

NEON と VFP プログラ ミング
VMSR FPSCR,r10
VFPASSERT VECTOR
; assert vector mode, unspecified length & stride
faddd d4, d4, d0
; ERROR, scalar in vector mode
fadds s16, s0, s8 ; okay
fabss s24, s28 ; wrong length, but not faulted (unspecified)
VMRS r10,FPSCR
BIC r10,r10,#0x00370000
ORR r10,r10,#0x00030000 ; set length = 4, stride = 1
VMSR FPSCR,r10
VFPASSERT VECTOR ; assert vector mode, length 4, stride 1
fadds s24, s0, s8 ; okay
fabss s24, s24 ; ERROR, wrong length
VMRS r10,FPSCR
BIC r10,r10,#0x00370000
ORR r10,r10,#0x00130000 ; set length = 4, stride = 2
VMSR FPSCR,r10
VFPASSERT VECTOR ; assert vector mode, length 4, stride 2
fadds s8, s0, s16 ; ERROR, wrong stride
fabss s16, s28 ; okay
fadds s8, s2, s16 ; okay (s8 and s16 both have
; length 4 and stride 2.
; s2 is scalar.)
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