case 55: /* negf freg, freg */
		o1 = c.oprrr(p, p.As, int(p.Scond))

		rf := int(p.From.Reg)
		rt := int(p.To.Reg)

		o1 |= (uint32(rf)&15)<<0 | (uint32(rt)&15)<<12

	case 56: /* move to FP[CS]R */
		o1 = ((uint32(p.Scond)&C_SCOND)^C_SCOND_XOR)<<28 | 0xee1<<16 | 0xa1<<4

		o1 |= (uint32(p.From.Reg) & 15) << 12

	case 57: /* move from FP[CS]R */

		{"-0", MaxPrec, "-0", Exact},
		{"-Inf", MaxPrec, "-Inf", Exact},
		{"+Inf", MaxPrec, "+Inf", Exact},

		// just a few regular cases - general rounding is tested elsewhere
		{"1.5", 1, "2", Above},
		{"-1.5", 1, "-2", Below},
		{"123", 1e6, "123", Exact},
		{"-123", 1e6, "-123", Exact},
	} {
		x := makeFloat(test.x).SetPrec(test.prec)
		prec := test.prec
		if prec > MaxPrec {
			prec = MaxPrec
		}

	//      ios/arm64         33         4MB           1  2048  (8KB)
	//       */32-bit         32         4MB           1  1024  (4KB)
	//     */mips(le)         31         4MB           1   512  (2KB)

	// heapArenaBytes is the size of a heap arena. The heap
	// consists of mappings of size heapArenaBytes, aligned to
	// heapArenaBytes. The initial heap mapping is one arena.
	//

	MOVW	$1508, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1509, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1510, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1511, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1512, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1513, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1514, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1515, R12
	B	runtime·callbackasm1(SB)
	MOVW	$1516, R12

	MOVD	$1508, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1509, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1510, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1511, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1512, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1513, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1514, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1515, R12
	B	runtime·callbackasm1(SB)
	MOVD	$1516, R12

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