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casting "extended vectors"
- From: Vincenzo Innocente <vincenzo dot innocente at cern dot ch>
- To: <gcc-help at gcc dot gnu dot org>
- Date: Sat, 5 Jul 2014 17:33:34 +0200
- Subject: casting "extended vectors"
- Authentication-results: sourceware.org; auth=none
at the end of
https://gcc.gnu.org/onlinedocs/gcc/Vector-Extensions.html
I read
"It is possible to cast from one vector type to another, provided they are of the same size"
when I try, it looks to me that it is actually more a type-punning rather than a C-style cast.
Is it possible to cast “vectors” as in C one casts intrinsic types?
given
typedef float __attribute__( ( vector_size( 16 ) ) ) float32x4_t;
typedef int __attribute__( ( vector_size( 16 ) ) ) int32x4_t;
float32x4_t vf{4.2,-3.2, 1.2, 7.2};
int32x4_t vi = int32x4_t(vf);
is not what I would like to be i.e.
int32x4_t vi{int(vf[0]),int(vf[1]),int(vf[2]),int(vf[3])};
best,
v.