}

// IsLoong64MUL reports whether the op (as defined by an loong64.A* constant) is
// one of the MUL/DIV/REM instructions that require special handling.
func IsLoong64MUL(op obj.As) bool {
	switch op {
	case loong64.AMUL, loong64.AMULU, loong64.AMULV, loong64.AMULVU,
		loong64.ADIV, loong64.ADIVU, loong64.ADIVV, loong64.ADIVVU,
		loong64.AREM, loong64.AREMU, loong64.AREMV, loong64.AREMVU:
		return true
	}
	return false
}

	rec, nl, rem := rest[:n-1], rest[n-1:n], rest[n:]
	if nl != "\n" {
		return "", "", s, ErrHeader
	}

	// The first equals separates the key from the value.
	k, v, ok = strings.Cut(rec, "=")
	if !ok {
		return "", "", s, ErrHeader
	}

	if !validPAXRecord(k, v) {
		return "", "", s, ErrHeader
	}
	return k, v, rem, nil
}

	MULU	R4, R5	   		// a5101c00
	MULU	R4, R5, R6		// a6101c00
	MULH	R4, R5	   		// a5901c00
	MULH	R4, R5, R6	   	// a6901c00
	MULHU	R4, R5			// a5101d00
	MULHU	R4, R5, R6		// a6101d00
	REM	R4, R5	  		// a5902000
	REM	R4, R5, R6	  	// a6902000
	REMU	R4, R5	   		// a5902100
	REMU	R4, R5, R6	   	// a6902100
	DIV	R4, R5	  		// a5102000
	DIV	R4, R5, R6	  	// a6102000
	DIVU	R4, R5	   		// a5102100