func feq32(x, y uint32) bool {
	cmp, nan := fcmp64(f32to64(x), f32to64(y))
	return cmp == 0 && !nan
}

func fgt32(x, y uint32) bool {
	cmp, nan := fcmp64(f32to64(x), f32to64(y))
	return cmp >= 1 && !nan
}

func fge32(x, y uint32) bool {
	cmp, nan := fcmp64(f32to64(x), f32to64(y))
	return cmp >= 0 && !nan
}

func feq64(x, y uint64) bool {
	cmp, nan := fcmp64(x, y)
	return cmp == 0 && !nan
}

	case f > g:
		return +1, false
	case f == g:
		return 0, false
	}
	return 0, true // must be NaN
}

func testcmp(t *testing.T, f, g float64) {
	hcmp, hisnan := hwcmp(f, g)
	scmp, sisnan := Fcmp64(math.Float64bits(f), math.Float64bits(g))
	if int32(hcmp) != scmp || hisnan != sisnan {
		err(t, "cmp(%g, %g) = sw %v, %v, hw %v, %v\n", f, g, scmp, sisnan, hcmp, hisnan)
	}
}

func same(f, g float64) bool {

		{fcmplt, 1.0, 1.0, 123, 123},
		{fcmple, 1.0, 1.0, 123, 0},
		{fcmpgt, 1.0, 1.0, 123, 123},
		{fcmpge, 1.0, 1.0, 123, 0},
		{fcmpeq, 1.0, 1.0, 123, 0},
		{fcmpne, 1.0, 1.0, 123, 123},

		{fcmplt, 1.0, 2.0, 123, 0},
		{fcmple, 1.0, 2.0, 123, 0},
		{fcmpgt, 1.0, 2.0, 123, 123},
		{fcmpge, 1.0, 2.0, 123, 123},
		{fcmpeq, 1.0, 2.0, 123, 123},
		{fcmpne, 1.0, 2.0, 123, 0},

		{fcmplt, 2.0, 1.0, 123, 123},

	"internal/runtime/atomic"
	"runtime/internal/sys"
	"unsafe"
)

var Fadd64 = fadd64
var Fsub64 = fsub64
var Fmul64 = fmul64
var Fdiv64 = fdiv64
var F64to32 = f64to32
var F32to64 = f32to64
var Fcmp64 = fcmp64
var Fintto64 = fintto64
var F64toint = f64toint

var Entersyscall = entersyscall
var Exitsyscall = exitsyscall
var LockedOSThread = lockedOSThread
var Xadduintptr = atomic.Xadduintptr

	"EONW",
	"EOR",
	"EORW",
	"ERET",
	"EXTR",
	"EXTRW",
	"FABSD",
	"FABSS",
	"FADDD",
	"FADDS",
	"FCCMPD",
	"FCCMPED",
	"FCCMPES",
	"FCCMPS",
	"FCMPD",
	"FCMPED",
	"FCMPES",
	"FCMPS",
	"FCSELD",
	"FCSELS",
	"FCVTDH",
	"FCVTDS",
	"FCVTHD",
	"FCVTHS",
	"FCVTSD",
	"FCVTSH",
	"FCVTZSD",
	"FCVTZSDW",
	"FCVTZSS",
	"FCVTZSSW",
	"FCVTZUD",

	//TODO VFCMLT $0, V8.S4, V7.S4             // 07e9a04e
	FCMPS F3, F17                              // 2022231e
	FCMPS $(0.0), F8                           // 0821201e
	FCMPD F11, F27                             // 60236b1e
	FCMPD $(0.0), F25                          // 2823601e
	FCMPES F16, F30                            // d023301e
	FCMPES $(0.0), F29                         // b823201e
	FCMPED F13, F10                            // 50216d1e

	"MODUD",
	"MODUW",
	"MODSD",
	"MODSW",
	"EQV",
	"EQVCC",
	"EXTSB",
	"EXTSBCC",
	"EXTSH",
	"EXTSHCC",
	"FABS",
	"FABSCC",
	"FADD",
	"FADDCC",
	"FADDS",
	"FADDSCC",
	"FCMPO",
	"FCMPU",
	"FCTIW",
	"FCTIWCC",
	"FCTIWZ",
	"FCTIWZCC",
	"FDIV",
	"FDIVCC",
	"FDIVS",
	"FDIVSCC",
	"FMADD",
	"FMADDCC",
	"FMADDS",
	"FMADDSCC",
	"FMOVD",
	"FMOVDCC",
	"FMOVDU",

	// arm64:"FMSUBD"
	// riscv64:"FNMSUBD\t"
	return z - x*y
}

func Cmp(f float64) bool {
	// arm64:"FCMPD","(BGT|BLE|BMI|BPL)",-"CSET\tGT",-"CBZ"
	return f > 4 || f < -4
}

func CmpZero64(f float64) bool {
	// s390x:"LTDBR",-"FCMPU"
	return f <= 0
}

func CmpZero32(f float32) bool {
	// s390x:"LTEBR",-"CEBR"
	return f <= 0
}

	"RXSBG",
	"ROSBG",
	"RNSBGT",
	"RXSBGT",
	"ROSBGT",
	"RISBG",
	"RISBGN",
	"RISBGZ",
	"RISBGNZ",
	"RISBHG",
	"RISBLG",
	"RISBHGZ",
	"RISBLGZ",
	"FABS",
	"FADD",
	"FADDS",
	"FCMPO",
	"FCMPU",
	"CEBR",
	"FDIV",
	"FDIVS",
	"FMADD",
	"FMADDS",
	"FMOVD",
	"FMOVS",
	"FMSUB",
	"FMSUBS",
	"FMUL",
	"FMULS",
	"FNABS",
	"FNEG",
	"FNEGS",
	"LEDBR",
	"LDEBR",
	"LPDFR",

Robert Griesemer <******@****.***> 1606801129 -0800