use sysv64 abi on windows

Author: gnzlbg

crates/assert-instr-macro/src/lib.rs

@@ -91,7 +91,7 @@ pub fn assert_instr(
     // Use an ABI on Windows that passes SIMD values in registers, like what
     // happens on Unix (I think?) by default.
     let abi = if cfg!(windows) {
-        syn::LitStr::new("vectorcall", proc_macro2::Span::call_site())
+        syn::LitStr::new("sysv64", proc_macro2::Span::call_site())
     } else {
         syn::LitStr::new("C", proc_macro2::Span::call_site())
     };