Attachment 131577 Details for Bug 100613 – Patch to lp_build_gather_elem_vec

[patch] Patch to lp_build_gather_elem_vec

0001-llvmpipe-lp_build_gather_elem_vec-BE-fix-for-3x16-lo.patch (text/plain), 1.90 KB, created by Ben Crocker on 2017-05-30 18:51:56 UTC

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Creator: Ben Crocker

Created: 2017-05-30 18:51:56 UTC

Size: 1.90 KB

patch

obsolete

>From 3f993cdf6db5cf344179fcb4fbf899f6ef9a6b2b Mon Sep 17 00:00:00 2001
>From: Ben Crocker <bcrocker@redhat.com>
>Date: Tue, 30 May 2017 12:34:23 -0400
>Subject: [PATCH] llvmpipe: lp_build_gather_elem_vec BE fix for 3x16 load
>
>Fix loading of a 3x16 vector as a single 48-bit load
>on big-endian systems (PPC64, S390).
>
>Signed-off-by: Ben Crocker <bcrocker@redhat.com>
>---
> src/gallium/auxiliary/gallivm/lp_bld_gather.c | 17 +++++++++++++++--
> 1 file changed, 15 insertions(+), 2 deletions(-)
>
>diff --git a/src/gallium/auxiliary/gallivm/lp_bld_gather.c b/src/gallium/auxiliary/gallivm/lp_bld_gather.c
>index ccd0376..8e56e42 100644
>--- a/src/gallium/auxiliary/gallivm/lp_bld_gather.c
>+++ b/src/gallium/auxiliary/gallivm/lp_bld_gather.c
>@@ -234,13 +234,26 @@ lp_build_gather_elem_vec(struct gallivm_state *gallivm,
>           */
>          res = LLVMBuildZExt(gallivm->builder, res, dst_elem_type, "");
> 
>-         if (vector_justify) {
> #ifdef PIPE_ARCH_BIG_ENDIAN
>+         if (vector_justify) {
>          res = LLVMBuildShl(gallivm->builder, res,
>                             LLVMConstInt(dst_elem_type,
>                                          dst_type.width - src_width, 0), "");
>-#endif
>          }
>+         if (src_width == 48) {
>+            LLVMValueRef shuffles[4] = {
>+               lp_build_const_int32(gallivm, 2),
>+               lp_build_const_int32(gallivm, 1),
>+               lp_build_const_int32(gallivm, 0),
>+               lp_build_const_int32(gallivm, 3),
>+            };
>+            struct lp_type type16 = {FALSE, FALSE, TRUE, FALSE, 16, 4};
>+            res = LLVMBuildBitCast(gallivm->builder, res,
>+                                   lp_build_vec_type(gallivm, type16), "");
>+            res = LLVMBuildShuffleVector(gallivm->builder, res, res, LLVMConstVector(shuffles, 4), "");
>+            res = LLVMBuildBitCast(gallivm->builder, res, dst_elem_type, "");
>+         }
>+#endif
>       }
>    }
>    return res;
>-- 
>2.7.4
>

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