f, _ := r.Float32()

					if !checkIsBestApprox32(t, f, r) {
						// Append context information.
						t.Errorf("(input was mantissa %#x, exp %d; f = %g (%b); f ~ %g; r = %v)",
							b, exp, f, f, math.Ldexp(float64(b), exp), r)
					}

					checkNonLossyRoundtrip32(t, f)
				}
			}
		}
	}
}

func TestFloat64Distribution(t *testing.T) {
	// Generate a distribution of (sign, mantissa, exp) values

				// Complete rollover 11...1 => 100...0, so shift is safe
				mantissa >>= 1
				exp++
			}
		}
	}
	mantissa >>= 1 // discard rounding bit.  Mantissa now scaled by 1<<Msize1.

	f = float32(math.Ldexp(float64(mantissa), exp-Msize1))
	if math.IsInf(float64(f), 0) {
		exact = false
	}
	return
}

// quotToFloat64 returns the non-negative float64 value
// nearest to the quotient a/b, using round-to-even in

		}
		m, err := strconv.Atoi(str[p+1:])
		if err != nil {
			// Put full string into error.
			if e, ok := err.(*strconv.NumError); ok {
				e.Num = str
			}
			s.error(err)
		}
		return math.Ldexp(f, m)
	}
	f, err := strconv.ParseFloat(str, n)
	if err != nil {
		s.error(err)
	}
	return f
}

// scanComplex converts the next token to a complex128 value.

		if r, ok := inst.Args[0].(Reg); ok {
			rno := uint16(r)
			if rno <= uint16(WZR) {
				op += "W"
			}
		}
		args[1], args[2], args[3] = args[3], args[1], args[2]

	case LDAXP, LDXP:
		if r, ok := inst.Args[0].(Reg); ok {
			rno := uint16(r)
			if rno <= uint16(WZR) {
				op += "W"
			}
		}
		args[0] = fmt.Sprintf("(%s, %s)", args[0], args[1])
		args[1] = args[2]

	LDAR (R27), R22                            // 76ffdfc8
	LDARB (R25), R2                            // 22ffdf08
	LDARH (R5), R7                             // a7fcdf48
	LDAXPW (R10), (R20, R16)                   // 54c17f88
	LDAXP (R25), (R30, R11)                    // 3eaf7fc8
	LDAXRW (R15), R2                           // e2fd5f88
	LDAXR (R15), R21                           // f5fd5fc8
	LDAXRB (R19), R16                          // 70fe5f08

The other extensions include <code>SXTH</code> (16-bit), <code>SXTW</code> (32-bit), and <code>SXTX</code> (64-bit).
</li>

<li>
<code>(R5, R6)</code>: Register pair for <code>LDAXP</code>/<code>LDP</code>/<code>LDXP</code>/<code>STLXP</code>/<code>STP</code>/<code>STP</code>.
</li>

</ul>

<p>
Reference: <a href="/pkg/cmd/internal/obj/arm64">Go ARM64 Assembly Instructions Reference Manual</a>
</p>