shader_recompiler: translate f64 to f32 when unsupported on host

src/video_core/renderer_opengl/gl_shader_cache.cpp

@@ -232,6 +232,7 @@ ShaderCache::ShaderCache(RasterizerOpenGL& rasterizer_, Core::Frontend::EmuWindo
           .gl_max_compute_smem_size = device.GetMaxComputeSharedMemorySize(),
       },
       host_info{
+          .support_float64 = true,
           .support_float16 = false,
           .support_int64 = device.HasShaderInt64(),
           .needs_demote_reorder = device.IsAmd(),

src/video_core/renderer_vulkan/vk_pipeline_cache.cpp

@@ -350,6 +350,7 @@ PipelineCache::PipelineCache(RasterizerVulkan& rasterizer_, const Device& device
         .has_broken_spirv_subgroup_mask_vector_extract_dynamic =
             driver_id == VK_DRIVER_ID_QUALCOMM_PROPRIETARY};
     host_info = Shader::HostTranslateInfo{
+        .support_float64 = device.IsFloat64Supported(),
         .support_float16 = device.IsFloat16Supported(),
         .support_int64 = device.IsShaderInt64Supported(),
         .needs_demote_reorder =

src/video_core/vulkan_common/vulkan_device.h

@@ -300,6 +300,11 @@ public:
         return GetDriverID() != VK_DRIVER_ID_QUALCOMM_PROPRIETARY;
     }
 
+    /// Returns true if the device suppors float64 natively.
+    bool IsFloat64Supported() const {
+        return features.features.shaderFloat64;
+    }
+
     /// Returns true if the device supports float16 natively.
     bool IsFloat16Supported() const {
         return features.shader_float16_int8.shaderFloat16;