ssmul: function()

in src/fp48.js [559:751]
168 lines of code
17 McCabe index (conditional complexity)

	ssmul: function(y) {
			if (this.stype==ctx.FP.ONE)
			{
				this.copy(y);
				return;
			}
			if (y.stype==ctx.FP.ONE)
				return;

			if (y.stype>=ctx.FP.SPARSE)
			{
				var z0=new ctx.FP16(this.a);
				var z1=new ctx.FP16(0);
				var z2=new ctx.FP16(0);
				var z3=new ctx.FP16(0);
				z0.mul(y.a);

				if (ctx.ECP.SEXTIC_TWIST==ctx.ECP.M_TYPE)
				{
					if (y.stype==ctx.FP.SPARSE || this.stype==ctx.FP.SPARSE)
					{
						z2.getb().copy(this.b.getb());
						z2.getb().mul(y.b.getb());
						z2.geta().zero();
						if (y.stype!=ctx.FP.SPARSE)
						{
							z2.geta().copy(this.b.getb());
							z2.geta().mul(y.b.geta());
						}
						if (this.stype!=ctx.FP.SPARSE)
						{
							z2.geta().copy(this.b.geta());
							z2.geta().mul(y.b.getb());
						}
						z2.times_i();
					} else {
						z2.copy(this.b);
						z2.mul(y.b);
					}
				} else {
					z2.copy(this.b);
					z2.mul(y.b);
				}
				var t0=new ctx.FP16(this.a);
				var t1=new ctx.FP16(y.a);
				t0.add(this.b); t0.norm();
				t1.add(y.b); t1.norm();

				z1.copy(t0); z1.mul(t1);
				t0.copy(this.b); t0.add(this.c); t0.norm();
				t1.copy(y.b); t1.add(y.c); t1.norm();

				z3.copy(t0); z3.mul(t1);

				t0.copy(z0); t0.neg();
				t1.copy(z2); t1.neg();

				z1.add(t0);
				this.b.copy(z1); this.b.add(t1);

				z3.add(t1);
				z2.add(t0);

				t0.copy(this.a); t0.add(this.c); t0.norm();
				t1.copy(y.a); t1.add(y.c); t1.norm();
	
				t0.mul(t1);
				z2.add(t0);

				if (ctx.ECP.SEXTIC_TWIST==ctx.ECP.D_TYPE)
				{
					if (y.stype==ctx.FP.SPARSE || this.stype==ctx.FP.SPARSE)
					{
						t0.geta().copy(this.c.geta());
						t0.geta().mul(y.c.geta());
						t0.getb().zero();
						if (y.stype!=ctx.FP.SPARSE)
						{
							t0.getb().copy(this.c.geta());
							t0.getb().mul(y.c.getb());
						}
						if (this.stype!=ctx.FP.SPARSE)
						{
							t0.getb().copy(this.c.getb());
							t0.getb().mul(y.c.geta());
						}
					} else {
						t0.copy(this.c);
						t0.mul(y.c);
					}
				} else {
					t0.copy(this.c);
					t0.mul(y.c);
				}
				t1.copy(t0); t1.neg();

				this.c.copy(z2); this.c.add(t1);
				z3.add(t1);
				t0.times_i();
				this.b.add(t0);
				z3.norm();
				z3.times_i();
				this.a.copy(z0); this.a.add(z3);
			} else {
				if (this.stype==ctx.FP.SPARSER)
				{
					this.smul(y);
					return;
				}
				if (ctx.ECP.SEXTIC_TWIST==ctx.ECP.D_TYPE)
				{ // dense by sparser - 13m 
					var z0=new ctx.FP16(this.a);
					var z2=new ctx.FP16(this.b);
					var z3=new ctx.FP16(this.b);
					var t0=new ctx.FP16(0);
					var t1=new ctx.FP16(y.a);
					z0.mul(y.a);
					z2.pmul(y.b.real());
					this.b.add(this.a);
					t1.real().add(y.b.real());

					t1.norm();
					this.b.norm();
					this.b.mul(t1);
					z3.add(this.c);
					z3.norm();
					z3.pmul(y.b.real());

					t0.copy(z0); t0.neg();
					t1.copy(z2); t1.neg();

					this.b.add(t0);

					this.b.add(t1);
					z3.add(t1);
					z2.add(t0);

					t0.copy(this.a); t0.add(this.c); t0.norm();
					z3.norm();
					t0.mul(y.a);
					this.c.copy(z2); this.c.add(t0);

					z3.times_i();
					this.a.copy(z0); this.a.add(z3);
				}
				if (ctx.ECP.SEXTIC_TWIST==ctx.ECP.M_TYPE)
				{
					var z0=new ctx.FP16(this.a);
					var z1=new ctx.FP16(0);
					var z2=new ctx.FP16(0);
					var z3=new ctx.FP16(0);
					var t0=new ctx.FP16(this.a);
					var t1=new ctx.FP16(0);
		
					z0.mul(y.a);
					t0.add(this.b); t0.norm();

					z1.copy(t0); z1.mul(y.a);
					t0.copy(this.b); t0.add(this.c);
					t0.norm();

					z3.copy(t0); 
					z3.pmul(y.c.getb());
					z3.times_i();

					t0.copy(z0); t0.neg();
					z1.add(t0);
					this.b.copy(z1); 
					z2.copy(t0);

					t0.copy(this.a); t0.add(this.c); t0.norm();
					t1.copy(y.a); t1.add(y.c); t1.norm();

					t0.mul(t1);
					z2.add(t0);
					t0.copy(this.c); 
			
					t0.pmul(y.c.getb());
					t0.times_i();
					t1.copy(t0); t1.neg();

					this.c.copy(z2); this.c.add(t1);
					z3.add(t1);
					t0.times_i();
					this.b.add(t0);
					z3.norm();
					z3.times_i();
					this.a.copy(z0); this.a.add(z3);
				}	
			}
			this.stype=ctx.FP.DENSE;
			this.norm();
		},