* {@code x} and {@code y} value pair.
   *
   * @since 20.0
   */
  public static final class LinearTransformationBuilder {

    private final double x1;
    private final double y1;

    private LinearTransformationBuilder(double x1, double y1) {
      this.x1 = x1;
      this.y1 = y1;
    }

    /**
     * Finish building an instance which also maps {@code x = x2} to {@code y = y2}. These values

	VPMADD52HUQ X7, X11, K1, X1                        // 62f2a509b5cf
	VPMADD52HUQ X0, X11, K1, X1                        // 62f2a509b5c8
	VPMADD52HUQ 17(SP)(BP*2), X11, K1, X1              // 62f2a509b58c6c11000000
	VPMADD52HUQ -7(DI)(R8*4), X11, K1, X1              // 62b2a509b58c87f9ffffff
	VPMADD52HUQ X7, X31, K1, X1                        // 62f28501b5cf
	VPMADD52HUQ X0, X31, K1, X1                        // 62f28501b5c8

		// Test AVX512 suffixes.
		{"VADDPD.A X0, X1, X2", `unknown suffix "A"`},
		{"VADDPD.A.A X0, X1, X2", `unknown suffix "A"; duplicate suffix "A"`},
		{"VADDPD.A.A.A X0, X1, X2", `unknown suffix "A"; duplicate suffix "A"`},
		{"VADDPD.A.B X0, X1, X2", `unknown suffix "A"; unknown suffix "B"`},
		{"VADDPD.Z.A X0, X1, X2", `Z suffix should be the last; unknown suffix "A"`},
		{"VADDPD.Z.Z X0, X1, X2", `Z suffix should be the last; duplicate suffix "Z"`},

	// Usage of rounding with invalid operands.
	VADDPD.RU_SAE X3, X2, K1, X1     // ERROR "unsupported rounding"
	VADDPD.RD_SAE X3, X2, K1, X1     // ERROR "unsupported rounding"
	VADDPD.RZ_SAE X3, X2, K1, X1     // ERROR "unsupported rounding"
	VADDPD.RN_SAE X3, X2, K1, X1     // ERROR "unsupported rounding"
	VADDPD.RU_SAE Y3, Y2, K1, Y1     // ERROR "unsupported rounding"

	JCS	2(PC)
loop:
	LOOP	loop // LOOP

	// Intel pseudonyms for our own renamings.
	PADDD	M2, M1 // PADDL M2, M1
	MOVDQ2Q	X1, M1 // MOVQ X1, M1
	MOVNTDQ	X1, (AX)	// MOVNTO X1, (AX)
	MOVOA	(AX), X1	// MOVO (AX), X1

// Tests for SP indexed addresses.
	MOVQ	foo(SP)(AX*1), BX		// 488b1c04
	MOVQ	foo+32(SP)(CX*2), DX		// 488b544c20
	MOVQ	foo+32323(SP)(R8*4), R9		// 4e8b8c84437e0000

	XVANDV		X1, X2, X3      // 43042675
	XVORV		X1, X2, X3      // 43842675
	XVXORV		X1, X2, X3      // 43042775
	XVNORV		X1, X2, X3      // 43842775
	XVANDNV		X1, X2, X3      // 43042875
	XVORNV		X1, X2, X3      // 43842875
	XVANDV		X1, X2		// 42042675
	XVORV		X1, X2		// 42842675
	XVXORV		X1, X2		// 42042775
	XVNORV		X1, X2		// 42842775
	XVANDNV		X1, X2		// 42042875
	XVORNV		X1, X2		// 42842875

	VPSRAW $-1, X1, X2           // c5e971e1ff
	VPSRAW $-1, Y1, Y2           // c5ed71e1ff
	VPSRLW $-1, X1, X1           // c5f171d1ff
	VPSRLW $-1, Y1, Y2           // c5ed71d1ff
	VEXTRACTPS $-1, X1, AX       // c4e37917c8ff
	VPEXTRB $-1, X1, AX          // c4e37914c8ff
	VPEXTRD $-1, X1, AX          // c4e37916c8ff
	VPEXTRQ $-1, X1, AX          // c4e3f916c8ff
	// EVEX: High-16 X registers.
	VADDPD X30, X1, X0          // 6291f50858c6

	VPERMI2B X15, X1, K7, X31                          // 6242750f75ff
	VPERMI2B X0, X1, K7, X31                           // 6262750f75f8
	VPERMI2B X16, X1, K7, X31                          // 6222750f75f8
	VPERMI2B 17(SP), X1, K7, X31                       // 6262750f75bc2411000000
	VPERMI2B -17(BP)(SI*4), X1, K7, X31                // 6262750f75bcb5efffffff

package p4

type Pair[T1 interface{ M() }, T2 ~int] struct {
	f1 T1
	f2 T2
}

func NewPair[T1 interface{ M() }, T2 ~int](v1 T1, v2 T2) Pair[T1, T2] {
	return Pair[T1, T2]{f1: v1, f2: v2}
}

func (p Pair[X1, _]) First() X1 {
	return p.f1
}

func (p Pair[_, X2]) Second() X2 {
	return p.f2
}

// Deprecated: Use something else.
func Clone[S ~[]T, T any](s S) S {
	return append(S(nil), s...)

	VGF2P8AFFINEQB $94, (R15), Z15, K1, Z30            // 62438549ce375e
	VGF2P8MULB X15, X1, K7, X7                         // 62d2750fcfff
	VGF2P8MULB X12, X1, K7, X7                         // 62d2750fcffc
	VGF2P8MULB X0, X1, K7, X7                          // 62f2750fcff8
	VGF2P8MULB 15(R8), X1, K7, X7                      // 62d2750fcfb80f000000
	VGF2P8MULB (BP), X1, K7, X7                        // 62f2750fcf7d00