Fix power10 gcc intrinsic check

[imciner2]

__builtin_vsx_assemble_pair was introduced in GCC 10 as the replacement, so it should be used for all greater GCC versions as well, otherwise compilation with GCC 11 will fail.

[RajalakshmiSR]

@imciner2 Can you paste the gcc version that you are using?

[RajalakshmiSR]

__builtin_vsx_build_pair() is the correct usage for gcc 11 and above.

[imciner2]

The GCC version is

$CC --version
powerpc64le-linux-gnu-gcc (GCC) 11.1.0
Copyright (C) 2021 Free Software Foundation, Inc.
This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

The errors I am seeing are specifically these:

[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c: In function ‘dgemm_small_kernel_nn_POWER10’:
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:180:3: warning: implicit declaration of function ‘__builtin_vsx_build_pair’; did you mean ‘__builtin_vsx_mul_2di’? [-Wimplicit-function-declaration]
[14:06:41]   180 |   __builtin_vsx_build_pair(&pair, (vec_t)v0, (vec_t)v1);
[14:06:41]       |   ^~~~~~~~~~~~~~~~~~~~~~~~
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:206:3: note: in expansion of macro ‘LOAD_PAIR’
[14:06:41]   206 |   LOAD_PAIR(pb0, t0, t1);           \
[14:06:41]       |   ^~~~~~~~~
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:368:13: note: in expansion of macro ‘LOAD_BTP_8x2’
[14:06:41]   368 |             LOAD_BTP_8x2(n, k);
[14:06:41]       |             ^~~~~~~~~~~~
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:368:13: error: AltiVec argument passed to unprototyped function
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:368:13: error: AltiVec argument passed to unprototyped function
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:368:13: error: AltiVec argument passed to unprototyped function
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:368:13: error: AltiVec argument passed to unprototyped function
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:379:13: error: AltiVec argument passed to unprototyped function
[14:06:41]   379 |             LOAD_BTP_8x1(n, k);
[14:06:41]       |             ^~~~~~~~~~~~
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:379:13: error: AltiVec argument passed to unprototyped function
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:405:11: error: AltiVec argument passed to unprototyped function
[14:06:41]   405 |           LOAD_BTP_8x2(n, k);
[14:06:41]       |           ^~~~~~~~~~~~
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:405:11: error: AltiVec argument passed to unprototyped function
[14:06:41] ../kernel/power/dgemm_small_kernel_nn_power10.c:405:11: error: AltiVec argument passed to unprototyped function

[RajalakshmiSR]

__builtin_vsx_build_pair() is available from 11.3. Can you change it as..
#if (defined(__GNUC__) && (__GNUC__ == 10 || (__GNUC__ == 11 && __GNUC_MINOR__ <= 2))

[imciner2]

__builtin_vsx_build_pair() is available from 11.3. Can you change it as..
#if (defined(GNUC) && (GNUC == 10 || (GNUC == 11 && GNUC_MINOR <= 2))

Yep, that works in my local testing, changed in the PR.