| #include <openssl/arm_arch.h> |
| |
| .text |
| |
| .globl _gcm_init_v8 |
| .private_extern _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] //store Htable[1..2] |
| |
| ret |
| |
| .globl _gcm_gmult_v8 |
| .private_extern _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 |
| .private_extern _gcm_ghash_v8 |
| |
| .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 |
| //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 |
| |
| .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 |
