GCC maintainers: The implemented argument order for the vec_rlnm() builtin for PPC64 is wrong. The following bugzilla was created for the issue:
https://gcc.gnu.org/bugzilla/show_bug.cgi?id=93819 I included a patch to fix the issue in the patch. Per the request from Martin Liska I am posting the patch as well to the GCC mailing list. The patch was tested on powerpc64le-unknown-linux-gnu (Power 9 LE) using the GCC mainline with the last commit: r280156 | jsm28 | 2020-01-10 18:16:54 -0600 (Fri, 10 Jan 2020) | 4 lines Add README.MOVED_TO_GIT. * README.MOVED_TO_GIT: New file. If someone can verify the issue and the fix, it would be appreciated. Please update the bugzilla with any feedback on the issue. Thanks. Carl Love ------------------------------------------------- vec_rlnm fix to make builtin work according to ABI --- gcc/config/rs6000/altivec.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) diff --git a/gcc/config/rs6000/altivec.h b/gcc/config/rs6000/altivec.h index e0b6547c6..5f1f59244 100644 --- a/gcc/config/rs6000/altivec.h +++ b/gcc/config/rs6000/altivec.h @@ -182,7 +182,7 @@ #define vec_recipdiv __builtin_vec_recipdiv #define vec_rlmi __builtin_vec_rlmi #define vec_vrlnm __builtin_vec_rlnm -#define vec_rlnm(a,b,c) (__builtin_vec_rlnm((a),((b)<<8)|(c))) +#define vec_rlnm(a,b,c) (__builtin_vec_rlnm((a),((c)<<8)|(b))) #define vec_rsqrt __builtin_vec_rsqrt #define vec_rsqrte __builtin_vec_rsqrte #define vec_signed __builtin_vec_vsigned -- 2.17.1
