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rs6000: correct BE vextract_fp_from_short[hl] vperm masks 

xvcvhpsp instruction converts a vector of bfloat16 half precision to single
precision.  The intrinsics vextract_fp_from_shorth and
vextract_fp_from_shortl select the high or low four elements of a
half precision vector to convert.  The intrinsics use vperm to select
the appropriate portion of the half precision vector and redistribute
the values for the xvcvhpsp instruction.  The big endian versions of the
masks for the intrinsics were initialized wrong.  This patch replaces the
masks with the correct values.  This corrects the failure of
builtins-3-p9-runnable.c testcase on big endian systems.

Bootstrapped powerpc-ibm-aix7.2.3.0 Power9.

gcc/ChangeLog:

	* config/rs6000/vsx.md (vextract_fp_from_shorth):  Fix vals_be.
	(vextract_fp_from_shortl) Same.
This commit is contained in:
David Edelsohn 2020-10-19 08:59:46 -04:00
parent 2d2f4ffc97
commit 8d31eb8f17
1 changed files with 2 additions and 2 deletions
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4
gcc/config/rs6000/vsx.md
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@ -5659,7 +5659,7 @@
{
int i;
int vals_le[16] = {15, 14, 0, 0, 13, 12, 0, 0, 11, 10, 0, 0, 9, 8, 0, 0};
int vals_be[16] = {7, 6, 0, 0, 5, 4, 0, 0, 3, 2, 0, 0, 1, 0, 0, 0};
int vals_be[16] = {0, 0, 0, 1, 0, 0, 2, 3, 0, 0, 4, 5, 0, 0, 6, 7};
rtx rvals[16];
rtx mask = gen_reg_rtx (V16QImode);
@ -5693,7 +5693,7 @@
"TARGET_P9_VECTOR"
{
int vals_le[16] = {7, 6, 0, 0, 5, 4, 0, 0, 3, 2, 0, 0, 1, 0, 0, 0};
int vals_be[16] = {15, 14, 0, 0, 13, 12, 0, 0, 11, 10, 0, 0, 9, 8, 0, 0};
int vals_be[16] = {0, 0, 8, 9, 0, 0, 10, 11, 0, 0, 12, 13, 0, 0, 14, 15};
int i;
rtx rvals[16];