From 5e62ba1347ee9b8614d5d72c60e87136a3bd7ab9 Mon Sep 17 00:00:00 2001
From: Robin Voetter <robin@voetter.nl>
Date: Mon, 10 Apr 2023 18:01:25 +0200
Subject: [PATCH] opencl: define size of C types

Define the size of the c types according the OpenCL specification.

Note that OpenCL does not define the size of long double. Clang generates
fp128, even though there is no extension that allows such types. The
llvm-spirv translator simply crashes.
---
 lib/std/target.zig | 12 +++++++++++-
 1 file changed, 11 insertions(+), 1 deletion(-)

diff --git a/lib/std/target.zig b/lib/std/target.zig
index f23e32fbe7..4acc3b3361 100644
--- a/lib/std/target.zig
+++ b/lib/std/target.zig
@@ -2220,6 +2220,17 @@ pub const Target = struct {
                 .longdouble => return 128,
             },
 
+            .opencl => switch (c_type) {
+                .char => return 8,
+                .short, .ushort => return 16,
+                .int, .uint, .float => return 32,
+                .long, .ulong, .double => return 64,
+                .longlong, .ulonglong => return 128,
+                // Note: The OpenCL specification does not guarantee a particular size for long double,
+                // but clang uses 128 bits.
+                .longdouble => return 128,
+            },
+
             .cloudabi,
             .kfreebsd,
             .lv2,
@@ -2234,7 +2245,6 @@ pub const Target = struct {
             .contiki,
             .hermit,
             .hurd,
-            .opencl,
             .glsl450,
             .vulkan,
             .driverkit,