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#include "arm_arch.h"
#if __ARM_MAX_ARCH__>=7
.text
.globl _gcm_init_v8
.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],#32 //store Htable[1..2]
//calculate H^3 and H^4
pmull v0.1q,v20.1d, v22.1d
pmull v5.1q,v22.1d,v22.1d
pmull2 v2.1q,v20.2d, v22.2d
pmull2 v7.1q,v22.2d,v22.2d
pmull v1.1q,v16.1d,v17.1d
pmull v6.1q,v17.1d,v17.1d
ext v16.16b,v0.16b,v2.16b,#8 //Karatsuba post-processing
ext v17.16b,v5.16b,v7.16b,#8
eor v18.16b,v0.16b,v2.16b
eor v1.16b,v1.16b,v16.16b
eor v4.16b,v5.16b,v7.16b
eor v6.16b,v6.16b,v17.16b
eor v1.16b,v1.16b,v18.16b
pmull v18.1q,v0.1d,v19.1d //1st phase
eor v6.16b,v6.16b,v4.16b
pmull v4.1q,v5.1d,v19.1d
ins v2.d[0],v1.d[1]
ins v7.d[0],v6.d[1]
ins v1.d[1],v0.d[0]
ins v6.d[1],v5.d[0]
eor v0.16b,v1.16b,v18.16b
eor v5.16b,v6.16b,v4.16b
ext v18.16b,v0.16b,v0.16b,#8 //2nd phase
ext v4.16b,v5.16b,v5.16b,#8
pmull v0.1q,v0.1d,v19.1d
pmull v5.1q,v5.1d,v19.1d
eor v18.16b,v18.16b,v2.16b
eor v4.16b,v4.16b,v7.16b
eor v20.16b, v0.16b,v18.16b //H^3
eor v22.16b,v5.16b,v4.16b //H^4
ext v16.16b,v20.16b, v20.16b,#8 //Karatsuba pre-processing
ext v17.16b,v22.16b,v22.16b,#8
eor v16.16b,v16.16b,v20.16b
eor v17.16b,v17.16b,v22.16b
ext v21.16b,v16.16b,v17.16b,#8 //pack Karatsuba pre-processed
st1 {v20.2d,v21.2d,v22.2d},[x0] //store Htable[3..5]
ret
.globl _gcm_gmult_v8
.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
.globl _gcm_ghash_v8
.align 4
_gcm_ghash_v8:
cmp x3,#64
b.hs Lgcm_ghash_v8_4x
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
//algorithm 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 overstepping
//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
.align 4
gcm_ghash_v8_4x:
Lgcm_ghash_v8_4x:
ld1 {v0.2d},[x0] //load [rotated] Xi
ld1 {v20.2d,v21.2d,v22.2d},[x1],#48 //load twisted H, ..., H^2
movi v19.16b,#0xe1
ld1 {v26.2d,v27.2d,v28.2d},[x1] //load twisted H^3, ..., H^4
shl v19.2d,v19.2d,#57 //compose 0xc2.0 constant
ld1 {v4.2d,v5.2d,v6.2d,v7.2d},[x2],#64
#ifndef __ARMEB__
rev64 v0.16b,v0.16b
rev64 v5.16b,v5.16b
rev64 v6.16b,v6.16b
rev64 v7.16b,v7.16b
rev64 v4.16b,v4.16b
#endif
ext v25.16b,v7.16b,v7.16b,#8
ext v24.16b,v6.16b,v6.16b,#8
ext v23.16b,v5.16b,v5.16b,#8
pmull v29.1q,v20.1d,v25.1d //H·Ii+3
eor v7.16b,v7.16b,v25.16b
pmull2 v31.1q,v20.2d,v25.2d
pmull v30.1q,v21.1d,v7.1d
pmull v16.1q,v22.1d,v24.1d //H^2·Ii+2
eor v6.16b,v6.16b,v24.16b
pmull2 v24.1q,v22.2d,v24.2d
pmull2 v6.1q,v21.2d,v6.2d
eor v29.16b,v29.16b,v16.16b
eor v31.16b,v31.16b,v24.16b
eor v30.16b,v30.16b,v6.16b
pmull v7.1q,v26.1d,v23.1d //H^3·Ii+1
eor v5.16b,v5.16b,v23.16b
pmull2 v23.1q,v26.2d,v23.2d
pmull v5.1q,v27.1d,v5.1d
eor v29.16b,v29.16b,v7.16b
eor v31.16b,v31.16b,v23.16b
eor v30.16b,v30.16b,v5.16b
subs x3,x3,#128
b.lo Ltail4x
b Loop4x
.align 4
Loop4x:
eor v16.16b,v4.16b,v0.16b
ld1 {v4.2d,v5.2d,v6.2d,v7.2d},[x2],#64
ext v3.16b,v16.16b,v16.16b,#8
#ifndef __ARMEB__
rev64 v5.16b,v5.16b
rev64 v6.16b,v6.16b
rev64 v7.16b,v7.16b
rev64 v4.16b,v4.16b
#endif
pmull v0.1q,v28.1d,v3.1d //H^4·(Xi+Ii)
eor v16.16b,v16.16b,v3.16b
pmull2 v2.1q,v28.2d,v3.2d
ext v25.16b,v7.16b,v7.16b,#8
pmull2 v1.1q,v27.2d,v16.2d
eor v0.16b,v0.16b,v29.16b
eor v2.16b,v2.16b,v31.16b
ext v24.16b,v6.16b,v6.16b,#8
eor v1.16b,v1.16b,v30.16b
ext v23.16b,v5.16b,v5.16b,#8
ext v17.16b,v0.16b,v2.16b,#8 //Karatsuba post-processing
eor v18.16b,v0.16b,v2.16b
pmull v29.1q,v20.1d,v25.1d //H·Ii+3
eor v7.16b,v7.16b,v25.16b
eor v1.16b,v1.16b,v17.16b
pmull2 v31.1q,v20.2d,v25.2d
eor v1.16b,v1.16b,v18.16b
pmull v30.1q,v21.1d,v7.1d
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]
pmull v16.1q,v22.1d,v24.1d //H^2·Ii+2
eor v6.16b,v6.16b,v24.16b
pmull2 v24.1q,v22.2d,v24.2d
eor v0.16b,v1.16b,v18.16b
pmull2 v6.1q,v21.2d,v6.2d
eor v29.16b,v29.16b,v16.16b
eor v31.16b,v31.16b,v24.16b
eor v30.16b,v30.16b,v6.16b
ext v18.16b,v0.16b,v0.16b,#8 //2nd phase of reduction
pmull v0.1q,v0.1d,v19.1d
pmull v7.1q,v26.1d,v23.1d //H^3·Ii+1
eor v5.16b,v5.16b,v23.16b
eor v18.16b,v18.16b,v2.16b
pmull2 v23.1q,v26.2d,v23.2d
pmull v5.1q,v27.1d,v5.1d
eor v0.16b,v0.16b,v18.16b
eor v29.16b,v29.16b,v7.16b
eor v31.16b,v31.16b,v23.16b
ext v0.16b,v0.16b,v0.16b,#8
eor v30.16b,v30.16b,v5.16b
subs x3,x3,#64
b.hs Loop4x
Ltail4x:
eor v16.16b,v4.16b,v0.16b
ext v3.16b,v16.16b,v16.16b,#8
pmull v0.1q,v28.1d,v3.1d //H^4·(Xi+Ii)
eor v16.16b,v16.16b,v3.16b
pmull2 v2.1q,v28.2d,v3.2d
pmull2 v1.1q,v27.2d,v16.2d
eor v0.16b,v0.16b,v29.16b
eor v2.16b,v2.16b,v31.16b
eor v1.16b,v1.16b,v30.16b
adds x3,x3,#64
b.eq Ldone4x
cmp x3,#32
b.lo Lone
b.eq Ltwo
Lthree:
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 {v4.2d,v5.2d,v6.2d},[x2]
eor v1.16b,v1.16b,v18.16b
#ifndef __ARMEB__
rev64 v5.16b,v5.16b
rev64 v6.16b,v6.16b
rev64 v4.16b,v4.16b
#endif
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]
ext v24.16b,v6.16b,v6.16b,#8
ext v23.16b,v5.16b,v5.16b,#8
eor v0.16b,v1.16b,v18.16b
pmull v29.1q,v20.1d,v24.1d //H·Ii+2
eor v6.16b,v6.16b,v24.16b
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
pmull2 v31.1q,v20.2d,v24.2d
pmull v30.1q,v21.1d,v6.1d
eor v0.16b,v0.16b,v18.16b
pmull v7.1q,v22.1d,v23.1d //H^2·Ii+1
eor v5.16b,v5.16b,v23.16b
ext v0.16b,v0.16b,v0.16b,#8
pmull2 v23.1q,v22.2d,v23.2d
eor v16.16b,v4.16b,v0.16b
pmull2 v5.1q,v21.2d,v5.2d
ext v3.16b,v16.16b,v16.16b,#8
eor v29.16b,v29.16b,v7.16b
eor v31.16b,v31.16b,v23.16b
eor v30.16b,v30.16b,v5.16b
pmull v0.1q,v26.1d,v3.1d //H^3·(Xi+Ii)
eor v16.16b,v16.16b,v3.16b
pmull2 v2.1q,v26.2d,v3.2d
pmull v1.1q,v27.1d,v16.1d
eor v0.16b,v0.16b,v29.16b
eor v2.16b,v2.16b,v31.16b
eor v1.16b,v1.16b,v30.16b
b Ldone4x
.align 4
Ltwo:
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 {v4.2d,v5.2d},[x2]
eor v1.16b,v1.16b,v18.16b
#ifndef __ARMEB__
rev64 v5.16b,v5.16b
rev64 v4.16b,v4.16b
#endif
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]
ext v23.16b,v5.16b,v5.16b,#8
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
ext v0.16b,v0.16b,v0.16b,#8
pmull v29.1q,v20.1d,v23.1d //H·Ii+1
eor v5.16b,v5.16b,v23.16b
eor v16.16b,v4.16b,v0.16b
ext v3.16b,v16.16b,v16.16b,#8
pmull2 v31.1q,v20.2d,v23.2d
pmull v30.1q,v21.1d,v5.1d
pmull v0.1q,v22.1d,v3.1d //H^2·(Xi+Ii)
eor v16.16b,v16.16b,v3.16b
pmull2 v2.1q,v22.2d,v3.2d
pmull2 v1.1q,v21.2d,v16.2d
eor v0.16b,v0.16b,v29.16b
eor v2.16b,v2.16b,v31.16b
eor v1.16b,v1.16b,v30.16b
b Ldone4x
.align 4
Lone:
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 {v4.2d},[x2]
eor v1.16b,v1.16b,v18.16b
#ifndef __ARMEB__
rev64 v4.16b,v4.16b
#endif
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
ext v0.16b,v0.16b,v0.16b,#8
eor v16.16b,v4.16b,v0.16b
ext v3.16b,v16.16b,v16.16b,#8
pmull v0.1q,v20.1d,v3.1d
eor v16.16b,v16.16b,v3.16b
pmull2 v2.1q,v20.2d,v3.2d
pmull v1.1q,v21.1d,v16.1d
Ldone4x:
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
ext v0.16b,v0.16b,v0.16b,#8
#ifndef __ARMEB__
rev64 v0.16b,v0.16b
#endif
st1 {v0.2d},[x0] //write out Xi
ret
.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
#endif
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