clover/spirv: Add version conversion utilities

SPIR-V and OpenCL encodes differently version numbers and since SPIR-V
version numbers are reported in OpenCL, there is a need for utilities to
convert back and forth.

Reviewed-by: Dave Airlie <airlied@redhat.com>
Reviewed-by: Francisco Jerez <currojerez@riseup.net>
Signed-off-by: Pierre Moreau <dev@pmoreau.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/2078>

2 files changed, 28 insertions, 0 deletions

diff --git a/src/gallium/frontends/clover/spirv/invocation.cpp b/src/gallium/frontends/clover/spirv/invocation.cpp
index a755df18055..38b1c6398b0 100644
--- a/src/gallium/frontends/clover/spirv/invocation.cpp
+++ b/src/gallium/frontends/clover/spirv/invocation.cpp
@@ -837,6 +837,18 @@ clover::spirv::supported_versions() {
    return { make_spirv_version(1u, 0u) };
 }
 
+cl_version
+clover::spirv::to_opencl_version_encoding(uint32_t version) {
+      return CL_MAKE_VERSION((version >> 16u) & 0xff,
+                             (version >> 8u) & 0xff, 0u);
+}
+
+uint32_t
+clover::spirv::to_spirv_version_encoding(cl_version version) {
+   return ((CL_VERSION_MAJOR(version) & 0xff) << 16u) |
+          ((CL_VERSION_MINOR(version) & 0xff) << 8u);
+}
+
 #else
 bool
 clover::spirv::is_valid_spirv(const std::vector<char> &/*binary*/,
@@ -876,4 +888,14 @@ std::vector<uint32_t>
 clover::spirv::supported_versions() {
    return {};
 }
+
+cl_version
+clover::spirv::to_opencl_version_encoding(uint32_t version) {
+   return CL_MAKE_VERSION(0u, 0u, 0u);
+}
+
+uint32_t
+clover::spirv::to_spirv_version_encoding(cl_version version) {
+   return 0u;
+}
 #endif
diff --git a/src/gallium/frontends/clover/spirv/invocation.hpp b/src/gallium/frontends/clover/spirv/invocation.hpp
index f4ef93151d8..559260627c1 100644
--- a/src/gallium/frontends/clover/spirv/invocation.hpp
+++ b/src/gallium/frontends/clover/spirv/invocation.hpp
@@ -60,6 +60,12 @@ namespace clover {
       // Returns a vector (sorted in increasing order) of supported SPIR-V
       // versions.
       std::vector<uint32_t> supported_versions();
+
+      // Converts a version number from SPIR-V's encoding to OpenCL's one.
+      cl_version to_opencl_version_encoding(uint32_t version);
+
+      // Converts a version number from OpenCL's encoding to SPIR-V's one.
+      uint32_t to_spirv_version_encoding(cl_version version);
    }
 }