Commit 32196d8f769199db663f1d2986d8755537894515
2021-07-16T14:49:08
Vulkan: SPIR-V Gen: Support built-ins with out parameters Some built-ins have out parameters; modf, frexp, uaddCarry, usubBorrow, umulExtended and imulExtended. In SPIR-V, they are translated as such: - modf and frexp: Returns the same result as GLSL, with a pointer to store the output parameter. Since SPIR-V cannot create pointers to swizzles, a temp variable is used in that case. - uaddCarry, usubBorrow, umulExtended and imulExtended: These return a struct in SPIR-V, which contains the two output parameters; with lsb in field 0 and msb in field 1. Bug: angleproject:4889 Change-Id: Ic5114f74b9c1013093007e91939f78d5218f2a07 Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/3036088 Commit-Queue: Shahbaz Youssefi <syoussefi@chromium.org> Reviewed-by: Jamie Madill <jmadill@chromium.org> Reviewed-by: Tim Van Patten <timvp@google.com>