runtime/vm/compiler/ffi/unit_tests/mixedx20/x64_win.expect

rcx int64
xmm1 float
r8 int64
xmm3 double
S+0 int64
S+8 float
S+16 int64
S+24 double
S+32 int64
S+40 float
S+48 int64
S+56 double
S+64 int64
S+72 float
S+80 int64
S+88 double
S+96 int64
S+104 float
S+112 int64
S+120 double
=>
xmm0 double