Hi Carl,
on 2024/7/17 23:52, Carl Love wrote:
> GCC maintainers:
>
> The following patch removes the three __builtin_vsx_xvcmp[eq|ge|gt]sp
> builtins as they similar to the overloaded vec_cmp[eq|ge|gt] built-ins. The
> difference is the overloaded built-ins return a vector of boolean or a vector
> of long long booleans where as the removed built-ins returned a vector of
> floats or vector of doubles.
>
> The tests for __builtin_vsx_xvcmp[eq|ge|gt]sp and
> __builtin_vsx_xvcmp[eq|ge|gt]dp are updated to use the overloaded
> vec_cmp[eq|ge|gt] built-in with the required changes for the return type.
> Note __builtin_vsx_xvcmp[eq|ge|gt]dp are used internally.
>
> The patches have been tested on a Power 10 LE system with no regressions.
>
> Please let me know if the patch is acceptable for mainline. Thanks.
>
> Carl
> ---------------------------------------------------------------------------------
> rs6000, remove __builtin_vsx_xvcmp* built-ins
>
> This patch removes the built-ins:
> __builtin_vsx_xvcmpeqsp, __builtin_vsx_xvcmpgesp,
> __builtin_vsx_xvcmpgtsp.
>
> which are similar to the overloaded vec_cmpeq, vec_cmpgt and vec_cmpge
> built-ins.
The important thing is that vec_cmp{eq,ge,gt} are PVIPR built-in functions,
which are more recommended.
>
> The difference is that the overloaded built-ins return a vector of
> booleans or a vector of long long boolean depending if the inputs were a
> vector of floats or a vector of doubles. The removed built-ins
> returned a vector of floats or vector of double for the vector float and
> vector double inputs respectively.
This paragraph is a bit confusing, as the previous paragraph is saying to
remove those *sp built-ins, then they can only return a bool int vector
(not a bool long long vector). It needs some rewording.
>
> The __builtin_vsx_xvcmpeqdp, __builtin_vsx_xvcmpgedp and
> __builtin_vsx_xvcmpgtdp are not removed as they are used by the
> overloaded vec_cmpeq, vec_cmpgt and vec_cmpge built-ins.
>
> The test cases for the __builtin_vsx_xvcmpeqsp, __builtin_vsx_xvcmpgesp,
> __builtin_vsx_xvcmpgtsp, __builtin_vsx_xvcmpeqdp,
> __builtin_vsx_xvcmpgedp and __builtin_vsx_xvcmpgtdp are changed to use
> the overloaded vec_cmpeq, vec_cmpgt, vec_cmpge built-ins. Use of the
> overloaded built-ins requires the result to be stored in a vector of
> boolean of the appropriate size or the result must be cast to the return
> type used by the original __builtin_vsx_xvcmp* built-ins.
It is missing a changelog here.
> ---
> gcc/config/rs6000/rs6000-builtins.def | 10 -------
> .../gcc.target/powerpc/vsx-builtin-3.c | 28 ++++++++++++++-----
> 2 files changed, 21 insertions(+), 17 deletions(-)
>
> diff --git a/gcc/config/rs6000/rs6000-builtins.def
> b/gcc/config/rs6000/rs6000-builtins.def
> index 77eb0f7e406..896d9686ac6 100644
> --- a/gcc/config/rs6000/rs6000-builtins.def
> +++ b/gcc/config/rs6000/rs6000-builtins.def
> @@ -1579,30 +1579,20 @@
> const signed int __builtin_vsx_xvcmpeqdp_p (signed int, vd, vd);
> XVCMPEQDP_P vector_eq_v2df_p {pred}
>
> - const vf __builtin_vsx_xvcmpeqsp (vf, vf);
> - XVCMPEQSP vector_eqv4sf {}
> -
> const vd __builtin_vsx_xvcmpgedp (vd, vd);
> XVCMPGEDP vector_gev2df {}
>
> const signed int __builtin_vsx_xvcmpgedp_p (signed int, vd, vd);
> XVCMPGEDP_P vector_ge_v2df_p {pred}
>
> - const vf __builtin_vsx_xvcmpgesp (vf, vf);
> - XVCMPGESP vector_gev4sf {}
> -
> const signed int __builtin_vsx_xvcmpgesp_p (signed int, vf, vf);
> XVCMPGESP_P vector_ge_v4sf_p {pred}
>
> const vd __builtin_vsx_xvcmpgtdp (vd, vd);
> XVCMPGTDP vector_gtv2df {}
> -
Unexpected remove.
> const signed int __builtin_vsx_xvcmpgtdp_p (signed int, vd, vd);
> XVCMPGTDP_P vector_gt_v2df_p {pred}
>
> - const vf __builtin_vsx_xvcmpgtsp (vf, vf);
> - XVCMPGTSP vector_gtv4sf {}
> -
> const signed int __builtin_vsx_xvcmpgtsp_p (signed int, vf, vf);
> XVCMPGTSP_P vector_gt_v4sf_p {pred}
>
> diff --git a/gcc/testsuite/gcc.target/powerpc/vsx-builtin-3.c
> b/gcc/testsuite/gcc.target/powerpc/vsx-builtin-3.c
> index 60f91aad23c..d67f97c8011 100644
> --- a/gcc/testsuite/gcc.target/powerpc/vsx-builtin-3.c
> +++ b/gcc/testsuite/gcc.target/powerpc/vsx-builtin-3.c
> @@ -156,13 +156,27 @@ int do_cmp (void)
> {
> int i = 0;
>
> - d[i][0] = __builtin_vsx_xvcmpeqdp (d[i][1], d[i][2]); i++;
> - d[i][0] = __builtin_vsx_xvcmpgtdp (d[i][1], d[i][2]); i++;
> - d[i][0] = __builtin_vsx_xvcmpgedp (d[i][1], d[i][2]); i++;
> -
> - f[i][0] = __builtin_vsx_xvcmpeqsp (f[i][1], f[i][2]); i++;
> - f[i][0] = __builtin_vsx_xvcmpgtsp (f[i][1], f[i][2]); i++;
> - f[i][0] = __builtin_vsx_xvcmpgesp (f[i][1], f[i][2]); i++;
> + /* The __builtin_vsx_xvcmp[gt|ge|eq]dp and __builtin_vsx_xvcmp[gt|ge|eq]sp
> + have been removed in favor of the overloaded vec_cmpeq, vec_cmpgt and
> + vec_cmpge built-ins. The __builtin_vsx_xvcmp* builtins returned a
> vector
> + result of the same type as the arguments. The vec_cmp* built-ins return
> + a vector of boolenas of the same size as the arguments. Thus the result
> + assignment must be to a boolean or cast to a boolean. Test both cases.
> + */
> +
> + d[i][0] = (vector double) vec_cmpeq (d[i][1], d[i][2]); i++;
> + d[i][0] = (vector double) vec_cmpgt (d[i][1], d[i][2]); i++;
> + d[i][0] = (vector double) vec_cmpge (d[i][1], d[i][2]); i++;
> + bl[i][0] = vec_cmpeq (d[i][1], d[i][2]); i++;
> + bl[i][0] = vec_cmpgt (d[i][1], d[i][2]); i++;
> + bl[i][0] = vec_cmpge (d[i][1], d[i][2]); i++;
> +
> + f[i][0] = (vector float) vec_cmpeq (f[i][1], f[i][2]); i++;
> + f[i][0] = (vector float) vec_cmpgt (f[i][1], f[i][2]); i++;
> + f[i][0] = (vector float) vec_cmpge (f[i][1], f[i][2]); i++;
> + bi[i][0] = vec_cmpeq (f[i][1], f[i][2]); i++;
> + bi[i][0] = vec_cmpgt (f[i][1], f[i][2]); i++;
> + bi[i][0] = vec_cmpge (f[i][1], f[i][2]); i++;
> return i;
> }
>
BR,
Kewen
