// SetLastError(0).
	MOVL	$0, 0x34(FS)

	MOVL	libcall_n(BX), CX

	// Fast version, do not store args on the stack.
	CMPL	CX, $0
	JE	docall

	// Copy args to the stack.
	MOVL	CX, AX
	SALL	$2, AX
	SUBL	AX, SP			// room for args
	MOVL	SP, DI
	MOVL	libcall_args(BX), SI
	CLD
	REP; MOVSL

docall:
	// Call stdcall or cdecl function.
	// DI SI BP BX are preserved, SP is not
	CALL	libcall_fn(BX)

	"ROLW",
	"RORB",
	"RORL",
	"RORQ",
	"RORW",
	"RORXL",
	"RORXQ",
	"ROUNDPD",
	"ROUNDPS",
	"ROUNDSD",
	"ROUNDSS",
	"RSM",
	"RSQRTPS",
	"RSQRTSS",
	"SAHF",
	"SALB",
	"SALL",
	"SALQ",
	"SALW",
	"SARB",
	"SARL",
	"SARQ",
	"SARW",
	"SARXL",
	"SARXQ",
	"SBBB",
	"SBBL",
	"SBBQ",
	"SBBW",
	"SCASB",
	"SCASL",
	"SCASQ",
	"SCASW",
	"SETCC",