gallivm: Require SSE2 for draw_llvm/llvmpipe due to LLVM PR6960.

Note that this also requires X86 for llvm, if llvmpipe/draw_llvm works
on PPC then the condition should be extended to include && x86.

Signed-off-by: Török Edwin <edwintorok@gmail.com>
Signed-off-by: José Fonseca <jfonseca@vmware.com>

2 files changed, 18 insertions, 2 deletions

diff --git a/src/gallium/auxiliary/draw/draw_llvm.c b/src/gallium/auxiliary/draw/draw_llvm.c
index ea9b7c90a5..8295a439b9 100644
--- a/src/gallium/auxiliary/draw/draw_llvm.c
+++ b/src/gallium/auxiliary/draw/draw_llvm.c
@@ -161,9 +161,16 @@ create_vertex_header(struct draw_llvm *llvm, int data_elems)
 struct draw_llvm *
 draw_llvm_create(struct draw_context *draw)
 {
-   struct draw_llvm *llvm = CALLOC_STRUCT( draw_llvm );
+   struct draw_llvm *llvm;
 
+#ifdef PIPE_ARCH_X86
    util_cpu_detect();
+   /* require SSE2 due to LLVM PR6960. */
+   if (!util_cpu_caps.has_sse2)
+       return NULL;
+#endif
+
+   llvm = CALLOC_STRUCT( draw_llvm );
 
    llvm->draw = draw;
    llvm->engine = draw->engine;
diff --git a/src/gallium/drivers/llvmpipe/lp_screen.c b/src/gallium/drivers/llvmpipe/lp_screen.c
index 111eedc4f2..586afc8855 100644
--- a/src/gallium/drivers/llvmpipe/lp_screen.c
+++ b/src/gallium/drivers/llvmpipe/lp_screen.c
@@ -266,7 +266,16 @@ llvmpipe_destroy_screen( struct pipe_screen *_screen )
 struct pipe_screen *
 llvmpipe_create_screen(struct sw_winsys *winsys)
 {
-   struct llvmpipe_screen *screen = CALLOC_STRUCT(llvmpipe_screen);
+   struct llvmpipe_screen *screen;
+
+#ifdef PIPE_ARCH_X86
+   /* require SSE2 due to LLVM PR6960. */
+   util_cpu_detect();
+   if (!util_cpu_caps.has_sse2)
+       return NULL;
+#endif
+
+   screen = CALLOC_STRUCT(llvmpipe_screen);
 
 #ifdef DEBUG
    LP_DEBUG = debug_get_flags_option("LP_DEBUG", lp_debug_flags, 0 );