Displaying 10 results from an estimated 10 matches for "v_a".
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2006 Oct 24
1
Variance Component/ICC Confidence Intervals via Bootstrap or Jackknife
I'm using the lme function in nmle to estimate the variance components
of a fully nested two-level model:
Y_ijk = mu + a_i + b_j(i) + e_k(j(i))
lme computes estimates of the variances for a, b, and e, call them v_a,
v_b, and v_e, and I can use the intervals function to get confidence
intervals. My understanding is that these intervals are probably not
that robust plus I need intervals on the intraclass correlation
coefficients:
v_a/(v_a + v_b + v_e)
and
(v_a + v_b)/(v_a + v_b + v_e).
I would like to use a...
2019 Jun 10
2
[RFC] Expose user provided vector function for auto-vectorization.
...t?
For the case mentioned earlier:
float MyAdd(float* a, int b) { return *a + b; }
__declspec(vector_variant(implements(MyAdd(float *a, int b)),
linear(a), vectorlength(8),
nomask, processor(core_2nd_gen_avx)))
__m256 __regcall MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2)
If FE emitted
;; Alwaysinline
define <8 x float> @MyAddVec.abi_wrapper(float* %v_a, <8 x i32> %v_b) {
;; Not sure about the exact values in the mask parameter.
%v_b1 = shufflevector <8 x i32> %v_b, <8 x i32> undef, <4 x i32><i32 0,...
2019 Jun 10
2
[RFC] Expose user provided vector function for auto-vectorization.
...-variant:
>
> float MyAdd(float* a, int b) { return *a + b; }
> __declspec(vector_variant(implements(MyAdd(float *a, int b)),
> linear(a), vectorlength(8),
> nomask, processor(core_2nd_gen_avx)))
> __m256 __regcall MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2)
>
> We need somehow communicate which lanes of widened "b" would map for the b1 parameter and which would go to the b2. If we only care about single ABI (like the one mandated by the OMP) than such things could be put to TTI, but what about other ABIs? S...
2019 Jun 07
2
[RFC] Expose user provided vector function for auto-vectorization.
...e-and-reference-vector-variant:
float MyAdd(float* a, int b) { return *a + b; }
__declspec(vector_variant(implements(MyAdd(float *a, int b)),
linear(a), vectorlength(8),
nomask, processor(core_2nd_gen_avx)))
__m256 __regcall MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2)
We need somehow communicate which lanes of widened "b" would map for the b1 parameter and which would go to the b2. If we only care about single ABI (like the one mandated by the OMP) than such things could be put to TTI, but what about other ABIs? Should we...
2019 Jun 11
2
RFC: Interface user provided vector functions with the vectorizer.
...ipermail/llvm-dev/2019-June/132885.html. Godbolt
rendering with ICC at https://godbolt.org/z/Of1NxZ
```
float MyAdd(float* a, int b) __attribute__(clang_declare_simd_variant(“MyAddVec", simdlen(8), notinbranch, arch("core_2nd_gen_avx"))
{
return *a + b;
}
__m256 MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2);
```
The resulting IR attribute is:
```
attribute #0 = {vector-abi-variant="_ZGVbN8l4v_MyAdd(MyAddVec)"}
```
## Example showing interaction with `declare simd`
```
#pragma omp declare simd linear(a) notinbranch
float foo_06(float *a, int x) __attribute__(c...
2019 Jun 17
3
RFC: Interface user provided vector functions with the vectorizer.
...t
> rendering with ICC at https://godbolt.org/z/Of1NxZ
>
> ```
> float MyAdd(float* a, int b) __attribute__(clang_declare_simd_variant(“MyAddVec", simdlen(8), notinbranch, arch("core_2nd_gen_avx"))
> {
> return *a + b;
> }
>
>
> __m256 MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2);
> ```
>
> The resulting IR attribute is:
>
> ```
> attribute #0 = {vector-abi-variant="_ZGVbN8l4v_MyAdd(MyAddVec)"}
> ```
>
> ## Example showing interaction with `declare simd`
>
> ```
> #pragma omp declare simd linear(a) n...
2019 Jun 24
2
RFC: Interface user provided vector functions with the vectorizer.
...gt;> > float MyAdd(float* a, int b)
> __attribute__(clang_declare_simd_variant(“MyAddVec", simdlen(8),
> notinbranch, arch("core_2nd_gen_avx"))
>> > {
>> > return *a + b;
>> > }
>> >
>> >
>> > __m256 MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2);
>> > ```
>> >
>> > The resulting IR attribute is:
>> >
>> > ```
>> > attribute #0 = {vector-abi-variant="_ZGVbN8l4v_MyAdd(MyAddVec)"}
>> > ```
>> >
>> > ## Example showing intera...
2019 Jun 21
2
RFC: Interface user provided vector functions with the vectorizer.
...rg/z/Of1NxZ
> >
> > ```
> > float MyAdd(float* a, int b)
> > __attribute__(clang_declare_simd_variant(“MyAddVec", simdlen(8), notinbranch, arch("core_2nd_gen_avx")) {
> > return *a + b;
> > }
> >
> >
> > __m256 MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2); ```
> >
> > The resulting IR attribute is:
> >
> > ```
> > attribute #0 = {vector-abi-variant="_ZGVbN8l4v_MyAdd(MyAddVec)"}
> > ```
> >
> > ## Example showing interaction with `declare simd`
> >
> >...
2019 Jun 24
4
RFC: Interface user provided vector functions with the vectorizer.
...org/z/Of1NxZ
> >
> > ```
> > float MyAdd(float* a, int b)
> > __attribute__(clang_declare_simd_variant(“MyAddVec", simdlen(8), notinbranch, arch("core_2nd_gen_avx")) {
> > return *a + b;
> > }
> >
> >
> > __m256 MyAddVec(float* v_a, __m128i v_b1, __m128i v_b2); ```
> >
> > The resulting IR attribute is:
> >
> > ```
> > attribute #0 = {vector-abi-variant="_ZGVbN8l4v_MyAdd(MyAddVec)"}
> > ```
> >
> > ## Example showing interaction with `declare simd`
> >
> >...
2019 Jun 24
2
RFC: Interface user provided vector functions with the vectorizer.
>Thank you everybody for their input, and for your patience. This is proving harder than expected! :)
Thank you for doing the hard part of the work.
Hideki
-----Original Message-----
From: Francesco Petrogalli [mailto:Francesco.Petrogalli at arm.com]
Sent: Monday, June 24, 2019 11:26 AM
To: Saito, Hideki <hideki.saito at intel.com>
Cc: Doerfert, Johannes <jdoerfert at anl.gov>;