FSTSW	AX
	ANDW    $0x4000, AX
	JNE     10(PC)       // jump if F0 = 0
	FXCHD   F0, F1       // F0=q (smaller), F1=p (larger)
	FDIVD   F1, F0       // F0=q(=q/p), F1=p
	FMULD   F0, F0       // F0=q*q, F1=p
	FLD1                 // F0=1, F1=q*q, F2=p
	FADDDP  F0, F1       // F0=1+q*q, F1=p
	FSQRT                // F0=sqrt(1+q*q), F1=p
	FMULDP  F0, F1       // F0=p*sqrt(1+q*q)
	FMOVDP  F0, ret+16(FP)
	RET

			args = nil
			op = "int3"
		}

	case LCALL, LJMP:
		if len(args) == 2 {
			args[0], args[1] = args[1], args[0]
		}

	case FCHS, FABS, FTST, FLDPI, FLDL2E, FLDLG2, F2XM1, FXAM, FLD1, FLDL2T, FSQRT, FRNDINT, FCOS, FSIN:
		if len(args) == 0 {
			args = append(args, "st0")
		}

	case FPTAN, FSINCOS, FUCOMPP, FCOMPP, FYL2X, FPATAN, FXTRACT, FPREM1, FPREM, FYL2XP1, FSCALE:
		if len(args) == 0 {

	"FCOS",
	"FDECSTP",
	"FDIVD",
	"FDIVDP",
	"FDIVF",
	"FDIVL",
	"FDIVRD",
	"FDIVRDP",
	"FDIVRF",
	"FDIVRL",
	"FDIVRW",
	"FDIVW",
	"FFREE",
	"FINCSTP",
	"FINIT",
	"FLD1",
	"FLDCW",
	"FLDENV",
	"FLDL2E",
	"FLDL2T",
	"FLDLG2",
	"FLDLN2",
	"FLDPI",
	"FLDZ",
	"FMOVB",
	"FMOVBP",
	"FMOVD",
	"FMOVDP",
	"FMOVF",
	"FMOVFP",
	"FMOVL",

	FINCSTP:         "FINCSTP",
	FIST:            "FIST",
	FISTP:           "FISTP",
	FISTTP:          "FISTTP",
	FISUB:           "FISUB",
	FISUBR:          "FISUBR",
	FLD:             "FLD",
	FLD1:            "FLD1",
	FLDCW:           "FLDCW",
	FLDENV:          "FLDENV",
	FLDL2E:          "FLDL2E",
	FLDL2T:          "FLDL2T",
	FLDLG2:          "FLDLG2",
	FLDLN2:          "FLDLN2",
	FLDPI:           "FLDPI",

	//TODO: FLDL (BX)                       // dd03
	//TODO: FLDL (R11)                      // 41dd03
	//TODO: FLDT (BX)                       // db2b
	//TODO: FLDT (R11)                      // 41db2b
	FLD1                                    // d9e8
	FLDCW (BX)                              // d92b
	FLDCW (R11)                             // 41d92b
	//TODO: FLDENVL (BX)                    // d923