runtime/vm/compiler/ffi/unit_tests/mixedx20/x64_fuchsia.expect

rdi int64
xmm0 float
rsi int64
xmm1 double
rdx int64
xmm2 float
rcx int64
xmm3 double
r8 int64
xmm4 float
r9 int64
xmm5 double
S+0 int64
xmm6 float
S+8 int64
xmm7 double
S+16 int64
S+24 float
S+32 int64
S+40 double
=>
xmm0 double