* {@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

		// 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

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...)

	V4FNMADDPS 99(R15)(R15*1), [Z21-Z24], K3, Z12      // 62125743aaa43f63000000
	V4FNMADDPS (DX), [Z21-Z24], K3, Z12                // 62725743aa22
	V4FNMADDSS -17(BP)(SI*8), [X1-X4], K4, X11         // 6272770cab9cf5efffffff or 6272772cab9cf5efffffff or 6272774cab9cf5efffffff
	V4FNMADDSS (R15), [X1-X4], K4, X11                 // 6252770cab1f or 6252772cab1f or 6252774cab1f

	MOVL	AX, BX
	MOVL	$4, BX

// LTYPEI spec7	{ outcode(int($1), &$2); }
	IMULL	AX
	IMULL	$4, CX
	IMULL	AX, BX

// LTYPEXC spec9	{ outcode(int($1), &$2); }
	CMPPD	X0, X1, 4
	CMPPD	foo+4(SB), X1, 4

// LTYPEX spec10	{ outcode(int($1), &$2); }
	PINSRD	$1, (AX), X0
	PINSRD	$2, foo+4(FP), X0

// Was bug: LOOP is a branch instruction.
	JCS	2(PC)
loop:
	LOOP	loop // LOOP

      h = remix(h);
      buf[bufLen++] = getChar(h);

      int x0 = buf[bufLen - 1] & 0xff;
      int x1 = buf[bufLen - 2] & 0xff;
      int x2 = buf[bufLen - 3] & 0xff;
      int x3 = buf[bufLen / 2] & 0xff;
      buf[((x0 << 16) + (x1 << 8) + x2) % bufLen] ^= x3;
      buf[((x1 << 16) + (x2 << 8) + x3) % bufLen] ^= i % 256;
    }
    assertEquals(0x7a1d67c50ec7e167L, h);
  }

      h = remix(h);
      buf[bufLen++] = getChar(h);

      int x0 = buf[bufLen - 1] & 0xff;
      int x1 = buf[bufLen - 2] & 0xff;
      int x2 = buf[bufLen - 3] & 0xff;
      int x3 = buf[bufLen / 2] & 0xff;
      buf[((x0 << 16) + (x1 << 8) + x2) % bufLen] ^= x3;
      buf[((x1 << 16) + (x2 << 8) + x3) % bufLen] ^= i % 256;
    }
    assertEquals(0xeaa3b1c985261632L, h);
  }

// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

TEXT errors(SB),$0
	VSHUF4IV	$16, V1, V2	// ERROR "operand out of range 0 to 15"
	XVSHUF4IV	$16, X1, X2	// ERROR "operand out of range 0 to 15"
	ADDV16		$1, R4, R5	// ERROR "the constant must be a multiple of 65536."
	ADDV16		$65535, R4, R5	// ERROR "the constant must be a multiple of 65536."