clover: test for nir fp64 lowering options for cl_khr_fp64

With NIR we have softfp64, but we don't really want this for CL,
so check whether fp64 is lowered to a software implementation.

Closes: https://gitlab.freedesktop.org/mesa/mesa/-/issues/7750

Signed-off-by: Gert Wollny <gert.wollny@collabora.com>
Reviewed-by: Karol Herbst <kherbst@redhat.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/19919>

src/gallium/frontends/clover/core/device.cpp

@@ -30,6 +30,7 @@
 #include "util/u_debug.h"
 #include "spirv/invocation.hpp"
 #include "nir/invocation.hpp"
+#include "nir.h"
 #include <fstream>
 
 using namespace clover;
@@ -359,7 +360,12 @@ device::image_support() const {
 
 bool
 device::has_doubles() const {
-   return pipe->get_param(pipe, PIPE_CAP_DOUBLES);
+   nir_shader_compiler_options *options =
+         (nir_shader_compiler_options *)pipe->get_compiler_options(pipe,
+                                                                   PIPE_SHADER_IR_NIR,
+                                                                   PIPE_SHADER_COMPUTE);
+   return pipe->get_param(pipe, PIPE_CAP_DOUBLES) &&
+         !(options->lower_doubles_options & nir_lower_fp64_full_software);
 }
 
 bool

src/gallium/frontends/clover/meson.build

@@ -164,5 +164,5 @@ libclover = static_library(
   ],
   gnu_symbol_visibility : 'hidden',
   link_with : [libclllvm, libclspirv, libclnir],
-  dependencies : idep_mesautil,
+  dependencies : [idep_mesautil, idep_nir],
 )