1 files changed, 230 insertions, 0 deletions
diff --git a/linux-aarch64/crypto/modes/ghashv8-armx.S b/linux-aarch64/crypto/modes/ghashv8-armx.S
new file mode 100644
index 0000000..ad19074
--- /dev/null
+++ b/linux-aarch64/crypto/modes/ghashv8-armx.S
@@ -0,0 +1,230 @@
+#include "arm_arch.h"
+
+.text
+#if !defined(__clang__)
+.arch	armv8-a+crypto
+#endif
+.globl	gcm_init_v8
+.type	gcm_init_v8,%function
+.align	4
+gcm_init_v8:
+	ld1	{v17.2d},[x1]		//load input H
+	movi	v19.16b,#0xe1
+	shl	v19.2d,v19.2d,#57		//0xc2.0
+	ext	v3.16b,v17.16b,v17.16b,#8
+	ushr	v18.2d,v19.2d,#63
+	dup	v17.4s,v17.s[1]
+	ext	v16.16b,v18.16b,v19.16b,#8		//t0=0xc2....01
+	ushr	v18.2d,v3.2d,#63
+	sshr	v17.4s,v17.4s,#31		//broadcast carry bit
+	and	v18.16b,v18.16b,v16.16b
+	shl	v3.2d,v3.2d,#1
+	ext	v18.16b,v18.16b,v18.16b,#8
+	and	v16.16b,v16.16b,v17.16b
+	orr	v3.16b,v3.16b,v18.16b		//H<<<=1
+	eor	v20.16b,v3.16b,v16.16b		//twisted H
+	st1	{v20.2d},[x0],#16		//store Htable[0]
+
+	//calculate H^2
+	ext	v16.16b,v20.16b,v20.16b,#8		//Karatsuba pre-processing
+	pmull	v0.1q,v20.1d,v20.1d
+	eor	v16.16b,v16.16b,v20.16b
+	pmull2	v2.1q,v20.2d,v20.2d
+	pmull	v1.1q,v16.1d,v16.1d
+
+	ext	v17.16b,v0.16b,v2.16b,#8		//Karatsuba post-processing
+	eor	v18.16b,v0.16b,v2.16b
+	eor	v1.16b,v1.16b,v17.16b
+	eor	v1.16b,v1.16b,v18.16b
+	pmull	v18.1q,v0.1d,v19.1d		//1st phase
+
+	ins	v2.d[0],v1.d[1]
+	ins	v1.d[1],v0.d[0]
+	eor	v0.16b,v1.16b,v18.16b
+
+	ext	v18.16b,v0.16b,v0.16b,#8		//2nd phase
+	pmull	v0.1q,v0.1d,v19.1d
+	eor	v18.16b,v18.16b,v2.16b
+	eor	v22.16b,v0.16b,v18.16b
+
+	ext	v17.16b,v22.16b,v22.16b,#8		//Karatsuba pre-processing
+	eor	v17.16b,v17.16b,v22.16b
+	ext	v21.16b,v16.16b,v17.16b,#8		//pack Karatsuba pre-processed
+	st1	{v21.2d,v22.2d},[x0]		//store Htable[1..2]
+
+	ret
+.size	gcm_init_v8,.-gcm_init_v8
+.globl	gcm_gmult_v8
+.type	gcm_gmult_v8,%function
+.align	4
+gcm_gmult_v8:
+	ld1	{v17.2d},[x0]		//load Xi
+	movi	v19.16b,#0xe1
+	ld1	{v20.2d,v21.2d},[x1]	//load twisted H, ...
+	shl	v19.2d,v19.2d,#57
+#ifndef __ARMEB__
+	rev64	v17.16b,v17.16b
+#endif
+	ext	v3.16b,v17.16b,v17.16b,#8
+
+	pmull	v0.1q,v20.1d,v3.1d		//H.lo·Xi.lo
+	eor	v17.16b,v17.16b,v3.16b		//Karatsuba pre-processing
+	pmull2	v2.1q,v20.2d,v3.2d		//H.hi·Xi.hi
+	pmull	v1.1q,v21.1d,v17.1d		//(H.lo+H.hi)·(Xi.lo+Xi.hi)
+
+	ext	v17.16b,v0.16b,v2.16b,#8		//Karatsuba post-processing
+	eor	v18.16b,v0.16b,v2.16b
+	eor	v1.16b,v1.16b,v17.16b
+	eor	v1.16b,v1.16b,v18.16b
+	pmull	v18.1q,v0.1d,v19.1d		//1st phase of reduction
+
+	ins	v2.d[0],v1.d[1]
+	ins	v1.d[1],v0.d[0]
+	eor	v0.16b,v1.16b,v18.16b
+
+	ext	v18.16b,v0.16b,v0.16b,#8		//2nd phase of reduction
+	pmull	v0.1q,v0.1d,v19.1d
+	eor	v18.16b,v18.16b,v2.16b
+	eor	v0.16b,v0.16b,v18.16b
+
+#ifndef __ARMEB__
+	rev64	v0.16b,v0.16b
+#endif
+	ext	v0.16b,v0.16b,v0.16b,#8
+	st1	{v0.2d},[x0]		//write out Xi
+
+	ret
+.size	gcm_gmult_v8,.-gcm_gmult_v8
+.globl	gcm_ghash_v8
+.type	gcm_ghash_v8,%function
+.align	4
+gcm_ghash_v8:
+	ld1	{v0.2d},[x0]		//load [rotated] Xi
+						//"[rotated]" means that
+						//loaded value would have
+						//to be rotated in order to
+						//make it appear as in
+						//alorithm specification
+	subs	x3,x3,#32		//see if x3 is 32 or larger
+	mov	x12,#16		//x12 is used as post-
+						//increment for input pointer;
+						//as loop is modulo-scheduled
+						//x12 is zeroed just in time
+						//to preclude oversteping
+						//inp[len], which means that
+						//last block[s] are actually
+						//loaded twice, but last
+						//copy is not processed
+	ld1	{v20.2d,v21.2d},[x1],#32	//load twisted H, ..., H^2
+	movi	v19.16b,#0xe1
+	ld1	{v22.2d},[x1]
+	csel	x12,xzr,x12,eq			//is it time to zero x12?
+	ext	v0.16b,v0.16b,v0.16b,#8		//rotate Xi
+	ld1	{v16.2d},[x2],#16	//load [rotated] I[0]
+	shl	v19.2d,v19.2d,#57		//compose 0xc2.0 constant
+#ifndef __ARMEB__
+	rev64	v16.16b,v16.16b
+	rev64	v0.16b,v0.16b
+#endif
+	ext	v3.16b,v16.16b,v16.16b,#8		//rotate I[0]
+	b.lo	.Lodd_tail_v8		//x3 was less than 32
+	ld1	{v17.2d},[x2],x12	//load [rotated] I[1]
+#ifndef __ARMEB__
+	rev64	v17.16b,v17.16b
+#endif
+	ext	v7.16b,v17.16b,v17.16b,#8
+	eor	v3.16b,v3.16b,v0.16b		//I[i]^=Xi
+	pmull	v4.1q,v20.1d,v7.1d		//H·Ii+1
+	eor	v17.16b,v17.16b,v7.16b		//Karatsuba pre-processing
+	pmull2	v6.1q,v20.2d,v7.2d
+	b	.Loop_mod2x_v8
+
+.align	4
+.Loop_mod2x_v8:
+	ext	v18.16b,v3.16b,v3.16b,#8
+	subs	x3,x3,#32		//is there more data?
+	pmull	v0.1q,v22.1d,v3.1d		//H^2.lo·Xi.lo
+	csel	x12,xzr,x12,lo			//is it time to zero x12?
+
+	pmull	v5.1q,v21.1d,v17.1d
+	eor	v18.16b,v18.16b,v3.16b		//Karatsuba pre-processing
+	pmull2	v2.1q,v22.2d,v3.2d		//H^2.hi·Xi.hi
+	eor	v0.16b,v0.16b,v4.16b		//accumulate
+	pmull2	v1.1q,v21.2d,v18.2d		//(H^2.lo+H^2.hi)·(Xi.lo+Xi.hi)
+	ld1	{v16.2d},[x2],x12	//load [rotated] I[i+2]
+
+	eor	v2.16b,v2.16b,v6.16b
+	csel	x12,xzr,x12,eq			//is it time to zero x12?
+	eor	v1.16b,v1.16b,v5.16b
+
+	ext	v17.16b,v0.16b,v2.16b,#8		//Karatsuba post-processing
+	eor	v18.16b,v0.16b,v2.16b
+	eor	v1.16b,v1.16b,v17.16b
+	ld1	{v17.2d},[x2],x12	//load [rotated] I[i+3]
+#ifndef __ARMEB__
+	rev64	v16.16b,v16.16b
+#endif
+	eor	v1.16b,v1.16b,v18.16b
+	pmull	v18.1q,v0.1d,v19.1d		//1st phase of reduction
+
+#ifndef __ARMEB__
+	rev64	v17.16b,v17.16b
+#endif
+	ins	v2.d[0],v1.d[1]
+	ins	v1.d[1],v0.d[0]
+	ext	v7.16b,v17.16b,v17.16b,#8
+	ext	v3.16b,v16.16b,v16.16b,#8
+	eor	v0.16b,v1.16b,v18.16b
+	pmull	v4.1q,v20.1d,v7.1d		//H·Ii+1
+	eor	v3.16b,v3.16b,v2.16b		//accumulate v3.16b early
+
+	ext	v18.16b,v0.16b,v0.16b,#8		//2nd phase of reduction
+	pmull	v0.1q,v0.1d,v19.1d
+	eor	v3.16b,v3.16b,v18.16b
+	eor	v17.16b,v17.16b,v7.16b		//Karatsuba pre-processing
+	eor	v3.16b,v3.16b,v0.16b
+	pmull2	v6.1q,v20.2d,v7.2d
+	b.hs	.Loop_mod2x_v8		//there was at least 32 more bytes
+
+	eor	v2.16b,v2.16b,v18.16b
+	ext	v3.16b,v16.16b,v16.16b,#8		//re-construct v3.16b
+	adds	x3,x3,#32		//re-construct x3
+	eor	v0.16b,v0.16b,v2.16b		//re-construct v0.16b
+	b.eq	.Ldone_v8		//is x3 zero?
+.Lodd_tail_v8:
+	ext	v18.16b,v0.16b,v0.16b,#8
+	eor	v3.16b,v3.16b,v0.16b		//inp^=Xi
+	eor	v17.16b,v16.16b,v18.16b		//v17.16b is rotated inp^Xi
+
+	pmull	v0.1q,v20.1d,v3.1d		//H.lo·Xi.lo
+	eor	v17.16b,v17.16b,v3.16b		//Karatsuba pre-processing
+	pmull2	v2.1q,v20.2d,v3.2d		//H.hi·Xi.hi
+	pmull	v1.1q,v21.1d,v17.1d		//(H.lo+H.hi)·(Xi.lo+Xi.hi)
+
+	ext	v17.16b,v0.16b,v2.16b,#8		//Karatsuba post-processing
+	eor	v18.16b,v0.16b,v2.16b
+	eor	v1.16b,v1.16b,v17.16b
+	eor	v1.16b,v1.16b,v18.16b
+	pmull	v18.1q,v0.1d,v19.1d		//1st phase of reduction
+
+	ins	v2.d[0],v1.d[1]
+	ins	v1.d[1],v0.d[0]
+	eor	v0.16b,v1.16b,v18.16b
+
+	ext	v18.16b,v0.16b,v0.16b,#8		//2nd phase of reduction
+	pmull	v0.1q,v0.1d,v19.1d
+	eor	v18.16b,v18.16b,v2.16b
+	eor	v0.16b,v0.16b,v18.16b
+
+.Ldone_v8:
+#ifndef __ARMEB__
+	rev64	v0.16b,v0.16b
+#endif
+	ext	v0.16b,v0.16b,v0.16b,#8
+	st1	{v0.2d},[x0]		//write out Xi
+
+	ret
+.size	gcm_ghash_v8,.-gcm_ghash_v8
+.byte	71,72,65,83,72,32,102,111,114,32,65,82,77,118,56,44,32,67,82,89,80,84,79,71,65,77,83,32,98,121,32,60,97,112,112,114,111,64,111,112,101,110,115,115,108,46,111,114,103,62,0
+.align	2
+.align	2