test_uint64{fn: mul_25_uint64, fnname: "mul_25_uint64", in: 81, want: 2025},
	test_uint64{fn: mul_uint64_25, fnname: "mul_uint64_25", in: 81, want: 2025},
	test_uint64{fn: mul_27_uint64, fnname: "mul_27_uint64", in: 3, want: 81},
	test_uint64{fn: mul_uint64_27, fnname: "mul_uint64_27", in: 3, want: 81},
	test_uint64{fn: mul_27_uint64, fnname: "mul_27_uint64", in: 5, want: 135},

	ctxt.hash = make(map[string]*LSym)
	ctxt.statichash = make(map[string]*LSym)

	afile := src.NewFileBase("a.go", "a.go")
	bfile := src.NewFileBase("b.go", "/foo/bar/b.go")
	lfile := src.NewLinePragmaBase(src.MakePos(afile, 8, 1), "linedir", "linedir", 100, 1)

	var tests = []struct {
		pos  src.Pos
		want string
	}{
		{src.NoPos, "??:0"},
		{src.MakePos(afile, 1, 0), "a.go:1"},
		{src.MakePos(afile, 2, 0), "a.go:2"},

	case arg_R2_12:
		return Reg(((x >> 12) & (1<<4 - 1)) | 1)

	case arg_SP:
		return SP

	case arg_Sd_Dd:
		v := (x >> 12) & (1<<4 - 1)
		vx := (x >> 22) & 1
		sz := (x >> 8) & 1
		if sz != 0 {
			return D0 + Reg(vx<<4+v)
		} else {
			return S0 + Reg(v<<1+vx)
		}

	case arg_Dd_Sd:
		return decodeArg(arg_Sd_Dd, x^(1<<8))

	case arg_Sd:
		v := (x >> 12) & (1<<4 - 1)

	_ = x[R_LOONG64_ADDR_HI-75]
	_ = x[R_LOONG64_ADDR_LO-76]
	_ = x[R_LOONG64_TLS_LE_HI-77]
	_ = x[R_LOONG64_TLS_LE_LO-78]
	_ = x[R_CALLLOONG64-79]
	_ = x[R_LOONG64_TLS_IE_HI-80]
	_ = x[R_LOONG64_TLS_IE_LO-81]
	_ = x[R_LOONG64_GOT_HI-82]
	_ = x[R_LOONG64_GOT_LO-83]
	_ = x[R_JMPLOONG64-84]
	_ = x[R_ADDRMIPSU-85]
	_ = x[R_ADDRMIPSTLS-86]
	_ = x[R_ADDRCUOFF-87]
	_ = x[R_WASMIMPORT-88]
	_ = x[R_XCOFFREF-89]

	{"deferrangefunc", funcTag, 74},
	{"rand32", funcTag, 75},
	{"makemap64", funcTag, 77},
	{"makemap", funcTag, 78},
	{"makemap_small", funcTag, 79},
	{"mapaccess1", funcTag, 80},
	{"mapaccess1_fast32", funcTag, 81},
	{"mapaccess1_fast64", funcTag, 82},
	{"mapaccess1_faststr", funcTag, 83},
	{"mapaccess1_fat", funcTag, 84},
	{"mapaccess2", funcTag, 85},
	{"mapaccess2_fast32", funcTag, 86},
	{"mapaccess2_fast64", funcTag, 87},

	_ = x[SPOP_VMALLS12E1OS-74]
	_ = x[SPOP_RVAE2IS-75]
	_ = x[SPOP_RVALE2IS-76]
	_ = x[SPOP_IPAS2E1OS-77]
	_ = x[SPOP_RIPAS2E1-78]
	_ = x[SPOP_RIPAS2E1OS-79]
	_ = x[SPOP_IPAS2LE1OS-80]
	_ = x[SPOP_RIPAS2LE1-81]
	_ = x[SPOP_RIPAS2LE1OS-82]
	_ = x[SPOP_RVAE2OS-83]
	_ = x[SPOP_RVALE2OS-84]
	_ = x[SPOP_RVAE2-85]
	_ = x[SPOP_RVALE2-86]
	_ = x[SPOP_ALLE3OS-87]
	_ = x[SPOP_VAE3OS-88]
	_ = x[SPOP_VALE3OS-89]

	SYS_MADVISE                 = 75
	SYS_VHANGUP                 = 76
	SYS_MINCORE                 = 78
	SYS_GETGROUPS               = 79
	SYS_SETGROUPS               = 80
	SYS_GETPGRP                 = 81
	SYS_SETITIMER               = 83
	SYS_SWAPON                  = 85
	SYS_GETITIMER               = 86
	SYS_SETHOSTNAME             = 88
	SYS_DUP2                    = 90
	SYS_FCNTL                   = 92

	SYS_SIGNALFD4               = 74
	SYS_VMSPLICE                = 75
	SYS_SPLICE                  = 76
	SYS_TEE                     = 77
	SYS_READLINKAT              = 78
	SYS_SYNC                    = 81
	SYS_FSYNC                   = 82
	SYS_FDATASYNC               = 83
	SYS_SYNC_FILE_RANGE         = 84
	SYS_TIMERFD_CREATE          = 85
	SYS_TIMERFD_SETTIME         = 86
	SYS_TIMERFD_GETTIME         = 87

	SYS_MADVISE                        = 75
	SYS_MINCORE                        = 78
	SYS_GETGROUPS                      = 79
	SYS_SETGROUPS                      = 80
	SYS_GETPGRP                        = 81
	SYS_SETPGID                        = 82
	SYS_SETITIMER                      = 83
	SYS_SWAPON                         = 85
	SYS_GETITIMER                      = 86
	SYS_GETDTABLESIZE                  = 89

	SYS_GETRLIMIT               = 76
	SYS_GETRUSAGE               = 77
	SYS_GETTIMEOFDAY            = 78
	SYS_SETTIMEOFDAY            = 79
	SYS_GETGROUPS               = 80
	SYS_SETGROUPS               = 81
	SYS_SELECT                  = 82
	SYS_SYMLINK                 = 83
	SYS_OLDLSTAT                = 84
	SYS_READLINK                = 85
	SYS_USELIB                  = 86
	SYS_SWAPON                  = 87