New upstream version 1.57.0+dfsg1

[rustc.git] / compiler / rustc_codegen_gcc / src / intrinsic / llvm.rs

diff --git a/compiler/rustc_codegen_gcc/src/intrinsic/llvm.rs b/compiler/rustc_codegen_gcc/src/intrinsic/llvm.rs
new file mode 100644 (file)
index 0000000..b074feb
--- /dev/null
+++ b/compiler/rustc_codegen_gcc/src/intrinsic/llvm.rs
@@ -0,0 +1,22 @@
+use gccjit::Function;
+
+use crate::context::CodegenCx;
+
+pub fn intrinsic<'gcc, 'tcx>(name: &str, cx: &CodegenCx<'gcc, 'tcx>) -> Function<'gcc> {
+    let _gcc_name =
+        match name {
+            "llvm.x86.xgetbv" => {
+                let gcc_name = "__builtin_trap";
+                let func = cx.context.get_builtin_function(gcc_name);
+                cx.functions.borrow_mut().insert(gcc_name.to_string(), func);
+                return func;
+            },
+            // NOTE: this doc specifies the equivalent GCC builtins: http://huonw.github.io/llvmint/llvmint/x86/index.html
+            "llvm.x86.sse2.cmp.pd" => "__builtin_ia32_cmppd",
+            "llvm.x86.sse2.movmsk.pd" => "__builtin_ia32_movmskpd",
+            "llvm.x86.sse2.pmovmskb.128" => "__builtin_ia32_pmovmskb128",
+            _ => unimplemented!("unsupported LLVM intrinsic {}", name)
+        };
+
+    unimplemented!();
+}