ECPoint$AbstractFp.smali

.class public abstract Lorg/spongycastle/math/ec/ECPoint$AbstractFp;
.super Lorg/spongycastle/math/ec/ECPoint;
.source "ECPoint.java"


# direct methods
.method protected constructor <init>(Lorg/spongycastle/math/ec/ECCurve;Lorg/spongycastle/math/ec/ECFieldElement;Lorg/spongycastle/math/ec/ECFieldElement;)V
    .registers 4

    .prologue
    .line 532
    invoke-direct {p0, p1, p2, p3}, Lorg/spongycastle/math/ec/ECPoint;-><init>(Lorg/spongycastle/math/ec/ECCurve;Lorg/spongycastle/math/ec/ECFieldElement;Lorg/spongycastle/math/ec/ECFieldElement;)V

    .line 533
    return-void
.end method

.method protected constructor <init>(Lorg/spongycastle/math/ec/ECCurve;Lorg/spongycastle/math/ec/ECFieldElement;Lorg/spongycastle/math/ec/ECFieldElement;[Lorg/spongycastle/math/ec/ECFieldElement;)V
    .registers 5

    .prologue
    .line 537
    invoke-direct {p0, p1, p2, p3, p4}, Lorg/spongycastle/math/ec/ECPoint;-><init>(Lorg/spongycastle/math/ec/ECCurve;Lorg/spongycastle/math/ec/ECFieldElement;Lorg/spongycastle/math/ec/ECFieldElement;[Lorg/spongycastle/math/ec/ECFieldElement;)V

    .line 538
    return-void
.end method


# virtual methods
.method protected getCompressionYTilde()Z
    .registers 2

    .prologue
    .line 542
    invoke-virtual {p0}, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->getAffineYCoord()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECFieldElement;->testBitZero()Z

    move-result v0

    return v0
.end method

.method protected satisfiesCurveEquation()Z
    .registers 8

    .prologue
    const/4 v5, 0x0

    .line 547
    iget-object v3, p0, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->x:Lorg/spongycastle/math/ec/ECFieldElement;

    iget-object v2, p0, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->y:Lorg/spongycastle/math/ec/ECFieldElement;

    iget-object v0, p0, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->curve:Lorg/spongycastle/math/ec/ECCurve;

    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECCurve;->getA()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v1

    iget-object v0, p0, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->curve:Lorg/spongycastle/math/ec/ECCurve;

    invoke-virtual {v0}, Lorg/spongycastle/math/ec/ECCurve;->getB()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    .line 548
    invoke-virtual {v2}, Lorg/spongycastle/math/ec/ECFieldElement;->square()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v2

    .line 550
    invoke-virtual {p0}, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->getCurveCoordinateSystem()I

    move-result v4

    packed-switch v4, :pswitch_data_76

    .line 580
    new-instance v0, Ljava/lang/IllegalStateException;

    const-string v1, "unsupported coordinate system"

    invoke-direct {v0, v1}, Ljava/lang/IllegalStateException;-><init>(Ljava/lang/String;)V

    throw v0

    .line 556
    :pswitch_24
    iget-object v4, p0, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->zs:[Lorg/spongycastle/math/ec/ECFieldElement;

    aget-object v4, v4, v5

    .line 557
    invoke-virtual {v4}, Lorg/spongycastle/math/ec/ECFieldElement;->isOne()Z

    move-result v5

    if-nez v5, :cond_42

    .line 559
    invoke-virtual {v4}, Lorg/spongycastle/math/ec/ECFieldElement;->square()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v5

    invoke-virtual {v4, v5}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v6

    .line 560
    invoke-virtual {v2, v4}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v2

    .line 561
    invoke-virtual {v1, v5}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v1

    .line 562
    invoke-virtual {v0, v6}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    .line 583
    :cond_42
    :goto_42
    :pswitch_42
    invoke-virtual {v3}, Lorg/spongycastle/math/ec/ECFieldElement;->square()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v4

    invoke-virtual {v4, v1}, Lorg/spongycastle/math/ec/ECFieldElement;->add(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v1

    invoke-virtual {v1, v3}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v1

    invoke-virtual {v1, v0}, Lorg/spongycastle/math/ec/ECFieldElement;->add(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    .line 584
    invoke-virtual {v2, v0}, Ljava/lang/Object;->equals(Ljava/lang/Object;)Z

    move-result v0

    return v0

    .line 570
    :pswitch_57
    iget-object v4, p0, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->zs:[Lorg/spongycastle/math/ec/ECFieldElement;

    aget-object v4, v4, v5

    .line 571
    invoke-virtual {v4}, Lorg/spongycastle/math/ec/ECFieldElement;->isOne()Z

    move-result v5

    if-nez v5, :cond_42

    .line 573
    invoke-virtual {v4}, Lorg/spongycastle/math/ec/ECFieldElement;->square()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v4

    invoke-virtual {v4}, Lorg/spongycastle/math/ec/ECFieldElement;->square()Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v5

    invoke-virtual {v4, v5}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v4

    .line 574
    invoke-virtual {v1, v5}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v1

    .line 575
    invoke-virtual {v0, v4}, Lorg/spongycastle/math/ec/ECFieldElement;->multiply(Lorg/spongycastle/math/ec/ECFieldElement;)Lorg/spongycastle/math/ec/ECFieldElement;

    move-result-object v0

    goto :goto_42

    .line 550
    :pswitch_data_76
    .packed-switch 0x0
        :pswitch_42
        :pswitch_24
        :pswitch_57
        :pswitch_57
        :pswitch_57
    .end packed-switch
.end method

.method public subtract(Lorg/spongycastle/math/ec/ECPoint;)Lorg/spongycastle/math/ec/ECPoint;
    .registers 3

    .prologue
    .line 589
    invoke-virtual {p1}, Lorg/spongycastle/math/ec/ECPoint;->isInfinity()Z

    move-result v0

    if-eqz v0, :cond_7

    .line 595
    :goto_6
    return-object p0

    :cond_7
    invoke-virtual {p1}, Lorg/spongycastle/math/ec/ECPoint;->negate()Lorg/spongycastle/math/ec/ECPoint;

    move-result-object v0

    invoke-virtual {p0, v0}, Lorg/spongycastle/math/ec/ECPoint$AbstractFp;->add(Lorg/spongycastle/math/ec/ECPoint;)Lorg/spongycastle/math/ec/ECPoint;

    move-result-object p0

    goto :goto_6
.end method