aboutsummaryrefslogtreecommitdiffstatshomepage
path: root/src/crypto/zinc/poly1305/poly1305-arm.S
diff options
context:
space:
mode:
Diffstat (limited to '')
-rw-r--r--src/crypto/zinc/poly1305/poly1305-arm.S1117
1 files changed, 0 insertions, 1117 deletions
diff --git a/src/crypto/zinc/poly1305/poly1305-arm.S b/src/crypto/zinc/poly1305/poly1305-arm.S
deleted file mode 100644
index 4a0e9d4..0000000
--- a/src/crypto/zinc/poly1305/poly1305-arm.S
+++ /dev/null
@@ -1,1117 +0,0 @@
-/* SPDX-License-Identifier: GPL-2.0 OR BSD-3-Clause */
-/*
- * Copyright (C) 2015-2018 Jason A. Donenfeld <Jason@zx2c4.com>. All Rights Reserved.
- * Copyright (C) 2006-2017 CRYPTOGAMS by <appro@openssl.org>. All Rights Reserved.
- *
- * This is based in part on Andy Polyakov's implementation from CRYPTOGAMS.
- */
-
-#include <linux/linkage.h>
-
-.text
-#if defined(__thumb2__)
-.syntax unified
-.thumb
-#else
-.code 32
-#endif
-
-.align 5
-ENTRY(poly1305_init_arm)
- stmdb sp!,{r4-r11}
-
- eor r3,r3,r3
- cmp r1,#0
- str r3,[r0,#0] @ zero hash value
- str r3,[r0,#4]
- str r3,[r0,#8]
- str r3,[r0,#12]
- str r3,[r0,#16]
- str r3,[r0,#36] @ is_base2_26
- add r0,r0,#20
-
-#ifdef __thumb2__
- it eq
-#endif
- moveq r0,#0
- beq .Lno_key
-
- ldrb r4,[r1,#0]
- mov r10,#0x0fffffff
- ldrb r5,[r1,#1]
- and r3,r10,#-4 @ 0x0ffffffc
- ldrb r6,[r1,#2]
- ldrb r7,[r1,#3]
- orr r4,r4,r5,lsl#8
- ldrb r5,[r1,#4]
- orr r4,r4,r6,lsl#16
- ldrb r6,[r1,#5]
- orr r4,r4,r7,lsl#24
- ldrb r7,[r1,#6]
- and r4,r4,r10
-
- ldrb r8,[r1,#7]
- orr r5,r5,r6,lsl#8
- ldrb r6,[r1,#8]
- orr r5,r5,r7,lsl#16
- ldrb r7,[r1,#9]
- orr r5,r5,r8,lsl#24
- ldrb r8,[r1,#10]
- and r5,r5,r3
-
- ldrb r9,[r1,#11]
- orr r6,r6,r7,lsl#8
- ldrb r7,[r1,#12]
- orr r6,r6,r8,lsl#16
- ldrb r8,[r1,#13]
- orr r6,r6,r9,lsl#24
- ldrb r9,[r1,#14]
- and r6,r6,r3
-
- ldrb r10,[r1,#15]
- orr r7,r7,r8,lsl#8
- str r4,[r0,#0]
- orr r7,r7,r9,lsl#16
- str r5,[r0,#4]
- orr r7,r7,r10,lsl#24
- str r6,[r0,#8]
- and r7,r7,r3
- str r7,[r0,#12]
-.Lno_key:
- ldmia sp!,{r4-r11}
-#if __LINUX_ARM_ARCH__ >= 5
- bx lr @ bx lr
-#else
- tst lr,#1
- moveq pc,lr @ be binary compatible with V4, yet
- .word 0xe12fff1e @ interoperable with Thumb ISA:-)
-#endif
-ENDPROC(poly1305_init_arm)
-
-.align 5
-ENTRY(poly1305_blocks_arm)
-.Lpoly1305_blocks_arm:
- stmdb sp!,{r3-r11,lr}
-
- ands r2,r2,#-16
- beq .Lno_data
-
- cmp r3,#0
- add r2,r2,r1 @ end pointer
- sub sp,sp,#32
-
- ldmia r0,{r4-r12} @ load context
-
- str r0,[sp,#12] @ offload stuff
- mov lr,r1
- str r2,[sp,#16]
- str r10,[sp,#20]
- str r11,[sp,#24]
- str r12,[sp,#28]
- b .Loop
-
-.Loop:
-#if __LINUX_ARM_ARCH__ < 7
- ldrb r0,[lr],#16 @ load input
-#ifdef __thumb2__
- it hi
-#endif
- addhi r8,r8,#1 @ 1<<128
- ldrb r1,[lr,#-15]
- ldrb r2,[lr,#-14]
- ldrb r3,[lr,#-13]
- orr r1,r0,r1,lsl#8
- ldrb r0,[lr,#-12]
- orr r2,r1,r2,lsl#16
- ldrb r1,[lr,#-11]
- orr r3,r2,r3,lsl#24
- ldrb r2,[lr,#-10]
- adds r4,r4,r3 @ accumulate input
-
- ldrb r3,[lr,#-9]
- orr r1,r0,r1,lsl#8
- ldrb r0,[lr,#-8]
- orr r2,r1,r2,lsl#16
- ldrb r1,[lr,#-7]
- orr r3,r2,r3,lsl#24
- ldrb r2,[lr,#-6]
- adcs r5,r5,r3
-
- ldrb r3,[lr,#-5]
- orr r1,r0,r1,lsl#8
- ldrb r0,[lr,#-4]
- orr r2,r1,r2,lsl#16
- ldrb r1,[lr,#-3]
- orr r3,r2,r3,lsl#24
- ldrb r2,[lr,#-2]
- adcs r6,r6,r3
-
- ldrb r3,[lr,#-1]
- orr r1,r0,r1,lsl#8
- str lr,[sp,#8] @ offload input pointer
- orr r2,r1,r2,lsl#16
- add r10,r10,r10,lsr#2
- orr r3,r2,r3,lsl#24
-#else
- ldr r0,[lr],#16 @ load input
-#ifdef __thumb2__
- it hi
-#endif
- addhi r8,r8,#1 @ padbit
- ldr r1,[lr,#-12]
- ldr r2,[lr,#-8]
- ldr r3,[lr,#-4]
-#ifdef __ARMEB__
- rev r0,r0
- rev r1,r1
- rev r2,r2
- rev r3,r3
-#endif
- adds r4,r4,r0 @ accumulate input
- str lr,[sp,#8] @ offload input pointer
- adcs r5,r5,r1
- add r10,r10,r10,lsr#2
- adcs r6,r6,r2
-#endif
- add r11,r11,r11,lsr#2
- adcs r7,r7,r3
- add r12,r12,r12,lsr#2
-
- umull r2,r3,r5,r9
- adc r8,r8,#0
- umull r0,r1,r4,r9
- umlal r2,r3,r8,r10
- umlal r0,r1,r7,r10
- ldr r10,[sp,#20] @ reload r10
- umlal r2,r3,r6,r12
- umlal r0,r1,r5,r12
- umlal r2,r3,r7,r11
- umlal r0,r1,r6,r11
- umlal r2,r3,r4,r10
- str r0,[sp,#0] @ future r4
- mul r0,r11,r8
- ldr r11,[sp,#24] @ reload r11
- adds r2,r2,r1 @ d1+=d0>>32
- eor r1,r1,r1
- adc lr,r3,#0 @ future r6
- str r2,[sp,#4] @ future r5
-
- mul r2,r12,r8
- eor r3,r3,r3
- umlal r0,r1,r7,r12
- ldr r12,[sp,#28] @ reload r12
- umlal r2,r3,r7,r9
- umlal r0,r1,r6,r9
- umlal r2,r3,r6,r10
- umlal r0,r1,r5,r10
- umlal r2,r3,r5,r11
- umlal r0,r1,r4,r11
- umlal r2,r3,r4,r12
- ldr r4,[sp,#0]
- mul r8,r9,r8
- ldr r5,[sp,#4]
-
- adds r6,lr,r0 @ d2+=d1>>32
- ldr lr,[sp,#8] @ reload input pointer
- adc r1,r1,#0
- adds r7,r2,r1 @ d3+=d2>>32
- ldr r0,[sp,#16] @ reload end pointer
- adc r3,r3,#0
- add r8,r8,r3 @ h4+=d3>>32
-
- and r1,r8,#-4
- and r8,r8,#3
- add r1,r1,r1,lsr#2 @ *=5
- adds r4,r4,r1
- adcs r5,r5,#0
- adcs r6,r6,#0
- adcs r7,r7,#0
- adc r8,r8,#0
-
- cmp r0,lr @ done yet?
- bhi .Loop
-
- ldr r0,[sp,#12]
- add sp,sp,#32
- stmia r0,{r4-r8} @ store the result
-
-.Lno_data:
-#if __LINUX_ARM_ARCH__ >= 5
- ldmia sp!,{r3-r11,pc}
-#else
- ldmia sp!,{r3-r11,lr}
- tst lr,#1
- moveq pc,lr @ be binary compatible with V4, yet
- .word 0xe12fff1e @ interoperable with Thumb ISA:-)
-#endif
-ENDPROC(poly1305_blocks_arm)
-
-.align 5
-ENTRY(poly1305_emit_arm)
- stmdb sp!,{r4-r11}
-.Lpoly1305_emit_enter:
- ldmia r0,{r3-r7}
- adds r8,r3,#5 @ compare to modulus
- adcs r9,r4,#0
- adcs r10,r5,#0
- adcs r11,r6,#0
- adc r7,r7,#0
- tst r7,#4 @ did it carry/borrow?
-
-#ifdef __thumb2__
- it ne
-#endif
- movne r3,r8
- ldr r8,[r2,#0]
-#ifdef __thumb2__
- it ne
-#endif
- movne r4,r9
- ldr r9,[r2,#4]
-#ifdef __thumb2__
- it ne
-#endif
- movne r5,r10
- ldr r10,[r2,#8]
-#ifdef __thumb2__
- it ne
-#endif
- movne r6,r11
- ldr r11,[r2,#12]
-
- adds r3,r3,r8
- adcs r4,r4,r9
- adcs r5,r5,r10
- adc r6,r6,r11
-
-#if __LINUX_ARM_ARCH__ >= 7
-#ifdef __ARMEB__
- rev r3,r3
- rev r4,r4
- rev r5,r5
- rev r6,r6
-#endif
- str r3,[r1,#0]
- str r4,[r1,#4]
- str r5,[r1,#8]
- str r6,[r1,#12]
-#else
- strb r3,[r1,#0]
- mov r3,r3,lsr#8
- strb r4,[r1,#4]
- mov r4,r4,lsr#8
- strb r5,[r1,#8]
- mov r5,r5,lsr#8
- strb r6,[r1,#12]
- mov r6,r6,lsr#8
-
- strb r3,[r1,#1]
- mov r3,r3,lsr#8
- strb r4,[r1,#5]
- mov r4,r4,lsr#8
- strb r5,[r1,#9]
- mov r5,r5,lsr#8
- strb r6,[r1,#13]
- mov r6,r6,lsr#8
-
- strb r3,[r1,#2]
- mov r3,r3,lsr#8
- strb r4,[r1,#6]
- mov r4,r4,lsr#8
- strb r5,[r1,#10]
- mov r5,r5,lsr#8
- strb r6,[r1,#14]
- mov r6,r6,lsr#8
-
- strb r3,[r1,#3]
- strb r4,[r1,#7]
- strb r5,[r1,#11]
- strb r6,[r1,#15]
-#endif
- ldmia sp!,{r4-r11}
-#if __LINUX_ARM_ARCH__ >= 5
- bx lr @ bx lr
-#else
- tst lr,#1
- moveq pc,lr @ be binary compatible with V4, yet
- .word 0xe12fff1e @ interoperable with Thumb ISA:-)
-#endif
-ENDPROC(poly1305_emit_arm)
-
-
-#ifdef CONFIG_KERNEL_MODE_NEON
-.fpu neon
-
-.align 5
-ENTRY(poly1305_init_neon)
-.Lpoly1305_init_neon:
- ldr r4,[r0,#20] @ load key base 2^32
- ldr r5,[r0,#24]
- ldr r6,[r0,#28]
- ldr r7,[r0,#32]
-
- and r2,r4,#0x03ffffff @ base 2^32 -> base 2^26
- mov r3,r4,lsr#26
- mov r4,r5,lsr#20
- orr r3,r3,r5,lsl#6
- mov r5,r6,lsr#14
- orr r4,r4,r6,lsl#12
- mov r6,r7,lsr#8
- orr r5,r5,r7,lsl#18
- and r3,r3,#0x03ffffff
- and r4,r4,#0x03ffffff
- and r5,r5,#0x03ffffff
-
- vdup.32 d0,r2 @ r^1 in both lanes
- add r2,r3,r3,lsl#2 @ *5
- vdup.32 d1,r3
- add r3,r4,r4,lsl#2
- vdup.32 d2,r2
- vdup.32 d3,r4
- add r4,r5,r5,lsl#2
- vdup.32 d4,r3
- vdup.32 d5,r5
- add r5,r6,r6,lsl#2
- vdup.32 d6,r4
- vdup.32 d7,r6
- vdup.32 d8,r5
-
- mov r5,#2 @ counter
-
-.Lsquare_neon:
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
- @ d1 = h1*r0 + h0*r1 + h4*5*r2 + h3*5*r3 + h2*5*r4
- @ d2 = h2*r0 + h1*r1 + h0*r2 + h4*5*r3 + h3*5*r4
- @ d3 = h3*r0 + h2*r1 + h1*r2 + h0*r3 + h4*5*r4
- @ d4 = h4*r0 + h3*r1 + h2*r2 + h1*r3 + h0*r4
-
- vmull.u32 q5,d0,d0[1]
- vmull.u32 q6,d1,d0[1]
- vmull.u32 q7,d3,d0[1]
- vmull.u32 q8,d5,d0[1]
- vmull.u32 q9,d7,d0[1]
-
- vmlal.u32 q5,d7,d2[1]
- vmlal.u32 q6,d0,d1[1]
- vmlal.u32 q7,d1,d1[1]
- vmlal.u32 q8,d3,d1[1]
- vmlal.u32 q9,d5,d1[1]
-
- vmlal.u32 q5,d5,d4[1]
- vmlal.u32 q6,d7,d4[1]
- vmlal.u32 q8,d1,d3[1]
- vmlal.u32 q7,d0,d3[1]
- vmlal.u32 q9,d3,d3[1]
-
- vmlal.u32 q5,d3,d6[1]
- vmlal.u32 q8,d0,d5[1]
- vmlal.u32 q6,d5,d6[1]
- vmlal.u32 q7,d7,d6[1]
- vmlal.u32 q9,d1,d5[1]
-
- vmlal.u32 q8,d7,d8[1]
- vmlal.u32 q5,d1,d8[1]
- vmlal.u32 q6,d3,d8[1]
- vmlal.u32 q7,d5,d8[1]
- vmlal.u32 q9,d0,d7[1]
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ lazy reduction as discussed in "NEON crypto" by D.J. Bernstein
- @ and P. Schwabe
- @
- @ H0>>+H1>>+H2>>+H3>>+H4
- @ H3>>+H4>>*5+H0>>+H1
- @
- @ Trivia.
- @
- @ Result of multiplication of n-bit number by m-bit number is
- @ n+m bits wide. However! Even though 2^n is a n+1-bit number,
- @ m-bit number multiplied by 2^n is still n+m bits wide.
- @
- @ Sum of two n-bit numbers is n+1 bits wide, sum of three - n+2,
- @ and so is sum of four. Sum of 2^m n-m-bit numbers and n-bit
- @ one is n+1 bits wide.
- @
- @ >>+ denotes Hnext += Hn>>26, Hn &= 0x3ffffff. This means that
- @ H0, H2, H3 are guaranteed to be 26 bits wide, while H1 and H4
- @ can be 27. However! In cases when their width exceeds 26 bits
- @ they are limited by 2^26+2^6. This in turn means that *sum*
- @ of the products with these values can still be viewed as sum
- @ of 52-bit numbers as long as the amount of addends is not a
- @ power of 2. For example,
- @
- @ H4 = H4*R0 + H3*R1 + H2*R2 + H1*R3 + H0 * R4,
- @
- @ which can't be larger than 5 * (2^26 + 2^6) * (2^26 + 2^6), or
- @ 5 * (2^52 + 2*2^32 + 2^12), which in turn is smaller than
- @ 8 * (2^52) or 2^55. However, the value is then multiplied by
- @ by 5, so we should be looking at 5 * 5 * (2^52 + 2^33 + 2^12),
- @ which is less than 32 * (2^52) or 2^57. And when processing
- @ data we are looking at triple as many addends...
- @
- @ In key setup procedure pre-reduced H0 is limited by 5*4+1 and
- @ 5*H4 - by 5*5 52-bit addends, or 57 bits. But when hashing the
- @ input H0 is limited by (5*4+1)*3 addends, or 58 bits, while
- @ 5*H4 by 5*5*3, or 59[!] bits. How is this relevant? vmlal.u32
- @ instruction accepts 2x32-bit input and writes 2x64-bit result.
- @ This means that result of reduction have to be compressed upon
- @ loop wrap-around. This can be done in the process of reduction
- @ to minimize amount of instructions [as well as amount of
- @ 128-bit instructions, which benefits low-end processors], but
- @ one has to watch for H2 (which is narrower than H0) and 5*H4
- @ not being wider than 58 bits, so that result of right shift
- @ by 26 bits fits in 32 bits. This is also useful on x86,
- @ because it allows to use paddd in place for paddq, which
- @ benefits Atom, where paddq is ridiculously slow.
-
- vshr.u64 q15,q8,#26
- vmovn.i64 d16,q8
- vshr.u64 q4,q5,#26
- vmovn.i64 d10,q5
- vadd.i64 q9,q9,q15 @ h3 -> h4
- vbic.i32 d16,#0xfc000000 @ &=0x03ffffff
- vadd.i64 q6,q6,q4 @ h0 -> h1
- vbic.i32 d10,#0xfc000000
-
- vshrn.u64 d30,q9,#26
- vmovn.i64 d18,q9
- vshr.u64 q4,q6,#26
- vmovn.i64 d12,q6
- vadd.i64 q7,q7,q4 @ h1 -> h2
- vbic.i32 d18,#0xfc000000
- vbic.i32 d12,#0xfc000000
-
- vadd.i32 d10,d10,d30
- vshl.u32 d30,d30,#2
- vshrn.u64 d8,q7,#26
- vmovn.i64 d14,q7
- vadd.i32 d10,d10,d30 @ h4 -> h0
- vadd.i32 d16,d16,d8 @ h2 -> h3
- vbic.i32 d14,#0xfc000000
-
- vshr.u32 d30,d10,#26
- vbic.i32 d10,#0xfc000000
- vshr.u32 d8,d16,#26
- vbic.i32 d16,#0xfc000000
- vadd.i32 d12,d12,d30 @ h0 -> h1
- vadd.i32 d18,d18,d8 @ h3 -> h4
-
- subs r5,r5,#1
- beq .Lsquare_break_neon
-
- add r6,r0,#(48+0*9*4)
- add r7,r0,#(48+1*9*4)
-
- vtrn.32 d0,d10 @ r^2:r^1
- vtrn.32 d3,d14
- vtrn.32 d5,d16
- vtrn.32 d1,d12
- vtrn.32 d7,d18
-
- vshl.u32 d4,d3,#2 @ *5
- vshl.u32 d6,d5,#2
- vshl.u32 d2,d1,#2
- vshl.u32 d8,d7,#2
- vadd.i32 d4,d4,d3
- vadd.i32 d2,d2,d1
- vadd.i32 d6,d6,d5
- vadd.i32 d8,d8,d7
-
- vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r6]!
- vst4.32 {d0[1],d1[1],d2[1],d3[1]},[r7]!
- vst4.32 {d4[0],d5[0],d6[0],d7[0]},[r6]!
- vst4.32 {d4[1],d5[1],d6[1],d7[1]},[r7]!
- vst1.32 {d8[0]},[r6,:32]
- vst1.32 {d8[1]},[r7,:32]
-
- b .Lsquare_neon
-
-.align 4
-.Lsquare_break_neon:
- add r6,r0,#(48+2*4*9)
- add r7,r0,#(48+3*4*9)
-
- vmov d0,d10 @ r^4:r^3
- vshl.u32 d2,d12,#2 @ *5
- vmov d1,d12
- vshl.u32 d4,d14,#2
- vmov d3,d14
- vshl.u32 d6,d16,#2
- vmov d5,d16
- vshl.u32 d8,d18,#2
- vmov d7,d18
- vadd.i32 d2,d2,d12
- vadd.i32 d4,d4,d14
- vadd.i32 d6,d6,d16
- vadd.i32 d8,d8,d18
-
- vst4.32 {d0[0],d1[0],d2[0],d3[0]},[r6]!
- vst4.32 {d0[1],d1[1],d2[1],d3[1]},[r7]!
- vst4.32 {d4[0],d5[0],d6[0],d7[0]},[r6]!
- vst4.32 {d4[1],d5[1],d6[1],d7[1]},[r7]!
- vst1.32 {d8[0]},[r6]
- vst1.32 {d8[1]},[r7]
-
- bx lr @ bx lr
-ENDPROC(poly1305_init_neon)
-
-.align 5
-ENTRY(poly1305_blocks_neon)
- ldr ip,[r0,#36] @ is_base2_26
- ands r2,r2,#-16
- beq .Lno_data_neon
-
- cmp r2,#64
- bhs .Lenter_neon
- tst ip,ip @ is_base2_26?
- beq .Lpoly1305_blocks_arm
-
-.Lenter_neon:
- stmdb sp!,{r4-r7}
- vstmdb sp!,{d8-d15} @ ABI specification says so
-
- tst ip,ip @ is_base2_26?
- bne .Lbase2_26_neon
-
- stmdb sp!,{r1-r3,lr}
- bl .Lpoly1305_init_neon
-
- ldr r4,[r0,#0] @ load hash value base 2^32
- ldr r5,[r0,#4]
- ldr r6,[r0,#8]
- ldr r7,[r0,#12]
- ldr ip,[r0,#16]
-
- and r2,r4,#0x03ffffff @ base 2^32 -> base 2^26
- mov r3,r4,lsr#26
- veor d10,d10,d10
- mov r4,r5,lsr#20
- orr r3,r3,r5,lsl#6
- veor d12,d12,d12
- mov r5,r6,lsr#14
- orr r4,r4,r6,lsl#12
- veor d14,d14,d14
- mov r6,r7,lsr#8
- orr r5,r5,r7,lsl#18
- veor d16,d16,d16
- and r3,r3,#0x03ffffff
- orr r6,r6,ip,lsl#24
- veor d18,d18,d18
- and r4,r4,#0x03ffffff
- mov r1,#1
- and r5,r5,#0x03ffffff
- str r1,[r0,#36] @ is_base2_26
-
- vmov.32 d10[0],r2
- vmov.32 d12[0],r3
- vmov.32 d14[0],r4
- vmov.32 d16[0],r5
- vmov.32 d18[0],r6
- adr r5,.Lzeros
-
- ldmia sp!,{r1-r3,lr}
- b .Lbase2_32_neon
-
-.align 4
-.Lbase2_26_neon:
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ load hash value
-
- veor d10,d10,d10
- veor d12,d12,d12
- veor d14,d14,d14
- veor d16,d16,d16
- veor d18,d18,d18
- vld4.32 {d10[0],d12[0],d14[0],d16[0]},[r0]!
- adr r5,.Lzeros
- vld1.32 {d18[0]},[r0]
- sub r0,r0,#16 @ rewind
-
-.Lbase2_32_neon:
- add r4,r1,#32
- mov r3,r3,lsl#24
- tst r2,#31
- beq .Leven
-
- vld4.32 {d20[0],d22[0],d24[0],d26[0]},[r1]!
- vmov.32 d28[0],r3
- sub r2,r2,#16
- add r4,r1,#32
-
-#ifdef __ARMEB__
- vrev32.8 q10,q10
- vrev32.8 q13,q13
- vrev32.8 q11,q11
- vrev32.8 q12,q12
-#endif
- vsri.u32 d28,d26,#8 @ base 2^32 -> base 2^26
- vshl.u32 d26,d26,#18
-
- vsri.u32 d26,d24,#14
- vshl.u32 d24,d24,#12
- vadd.i32 d29,d28,d18 @ add hash value and move to #hi
-
- vbic.i32 d26,#0xfc000000
- vsri.u32 d24,d22,#20
- vshl.u32 d22,d22,#6
-
- vbic.i32 d24,#0xfc000000
- vsri.u32 d22,d20,#26
- vadd.i32 d27,d26,d16
-
- vbic.i32 d20,#0xfc000000
- vbic.i32 d22,#0xfc000000
- vadd.i32 d25,d24,d14
-
- vadd.i32 d21,d20,d10
- vadd.i32 d23,d22,d12
-
- mov r7,r5
- add r6,r0,#48
-
- cmp r2,r2
- b .Long_tail
-
-.align 4
-.Leven:
- subs r2,r2,#64
- it lo
- movlo r4,r5
-
- vmov.i32 q14,#1<<24 @ padbit, yes, always
- vld4.32 {d20,d22,d24,d26},[r1] @ inp[0:1]
- add r1,r1,#64
- vld4.32 {d21,d23,d25,d27},[r4] @ inp[2:3] (or 0)
- add r4,r4,#64
- itt hi
- addhi r7,r0,#(48+1*9*4)
- addhi r6,r0,#(48+3*9*4)
-
-#ifdef __ARMEB__
- vrev32.8 q10,q10
- vrev32.8 q13,q13
- vrev32.8 q11,q11
- vrev32.8 q12,q12
-#endif
- vsri.u32 q14,q13,#8 @ base 2^32 -> base 2^26
- vshl.u32 q13,q13,#18
-
- vsri.u32 q13,q12,#14
- vshl.u32 q12,q12,#12
-
- vbic.i32 q13,#0xfc000000
- vsri.u32 q12,q11,#20
- vshl.u32 q11,q11,#6
-
- vbic.i32 q12,#0xfc000000
- vsri.u32 q11,q10,#26
-
- vbic.i32 q10,#0xfc000000
- vbic.i32 q11,#0xfc000000
-
- bls .Lskip_loop
-
- vld4.32 {d0[1],d1[1],d2[1],d3[1]},[r7]! @ load r^2
- vld4.32 {d0[0],d1[0],d2[0],d3[0]},[r6]! @ load r^4
- vld4.32 {d4[1],d5[1],d6[1],d7[1]},[r7]!
- vld4.32 {d4[0],d5[0],d6[0],d7[0]},[r6]!
- b .Loop_neon
-
-.align 5
-.Loop_neon:
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2
- @ ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^3+inp[7]*r
- @ ___________________/
- @ ((inp[0]*r^4+inp[2]*r^2+inp[4])*r^4+inp[6]*r^2+inp[8])*r^2
- @ ((inp[1]*r^4+inp[3]*r^2+inp[5])*r^4+inp[7]*r^2+inp[9])*r
- @ ___________________/ ____________________/
- @
- @ Note that we start with inp[2:3]*r^2. This is because it
- @ doesn't depend on reduction in previous iteration.
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ d4 = h4*r0 + h3*r1 + h2*r2 + h1*r3 + h0*r4
- @ d3 = h3*r0 + h2*r1 + h1*r2 + h0*r3 + h4*5*r4
- @ d2 = h2*r0 + h1*r1 + h0*r2 + h4*5*r3 + h3*5*r4
- @ d1 = h1*r0 + h0*r1 + h4*5*r2 + h3*5*r3 + h2*5*r4
- @ d0 = h0*r0 + h4*5*r1 + h3*5*r2 + h2*5*r3 + h1*5*r4
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ inp[2:3]*r^2
-
- vadd.i32 d24,d24,d14 @ accumulate inp[0:1]
- vmull.u32 q7,d25,d0[1]
- vadd.i32 d20,d20,d10
- vmull.u32 q5,d21,d0[1]
- vadd.i32 d26,d26,d16
- vmull.u32 q8,d27,d0[1]
- vmlal.u32 q7,d23,d1[1]
- vadd.i32 d22,d22,d12
- vmull.u32 q6,d23,d0[1]
-
- vadd.i32 d28,d28,d18
- vmull.u32 q9,d29,d0[1]
- subs r2,r2,#64
- vmlal.u32 q5,d29,d2[1]
- it lo
- movlo r4,r5
- vmlal.u32 q8,d25,d1[1]
- vld1.32 d8[1],[r7,:32]
- vmlal.u32 q6,d21,d1[1]
- vmlal.u32 q9,d27,d1[1]
-
- vmlal.u32 q5,d27,d4[1]
- vmlal.u32 q8,d23,d3[1]
- vmlal.u32 q9,d25,d3[1]
- vmlal.u32 q6,d29,d4[1]
- vmlal.u32 q7,d21,d3[1]
-
- vmlal.u32 q8,d21,d5[1]
- vmlal.u32 q5,d25,d6[1]
- vmlal.u32 q9,d23,d5[1]
- vmlal.u32 q6,d27,d6[1]
- vmlal.u32 q7,d29,d6[1]
-
- vmlal.u32 q8,d29,d8[1]
- vmlal.u32 q5,d23,d8[1]
- vmlal.u32 q9,d21,d7[1]
- vmlal.u32 q6,d25,d8[1]
- vmlal.u32 q7,d27,d8[1]
-
- vld4.32 {d21,d23,d25,d27},[r4] @ inp[2:3] (or 0)
- add r4,r4,#64
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ (hash+inp[0:1])*r^4 and accumulate
-
- vmlal.u32 q8,d26,d0[0]
- vmlal.u32 q5,d20,d0[0]
- vmlal.u32 q9,d28,d0[0]
- vmlal.u32 q6,d22,d0[0]
- vmlal.u32 q7,d24,d0[0]
- vld1.32 d8[0],[r6,:32]
-
- vmlal.u32 q8,d24,d1[0]
- vmlal.u32 q5,d28,d2[0]
- vmlal.u32 q9,d26,d1[0]
- vmlal.u32 q6,d20,d1[0]
- vmlal.u32 q7,d22,d1[0]
-
- vmlal.u32 q8,d22,d3[0]
- vmlal.u32 q5,d26,d4[0]
- vmlal.u32 q9,d24,d3[0]
- vmlal.u32 q6,d28,d4[0]
- vmlal.u32 q7,d20,d3[0]
-
- vmlal.u32 q8,d20,d5[0]
- vmlal.u32 q5,d24,d6[0]
- vmlal.u32 q9,d22,d5[0]
- vmlal.u32 q6,d26,d6[0]
- vmlal.u32 q8,d28,d8[0]
-
- vmlal.u32 q7,d28,d6[0]
- vmlal.u32 q5,d22,d8[0]
- vmlal.u32 q9,d20,d7[0]
- vmov.i32 q14,#1<<24 @ padbit, yes, always
- vmlal.u32 q6,d24,d8[0]
- vmlal.u32 q7,d26,d8[0]
-
- vld4.32 {d20,d22,d24,d26},[r1] @ inp[0:1]
- add r1,r1,#64
-#ifdef __ARMEB__
- vrev32.8 q10,q10
- vrev32.8 q11,q11
- vrev32.8 q12,q12
- vrev32.8 q13,q13
-#endif
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ lazy reduction interleaved with base 2^32 -> base 2^26 of
- @ inp[0:3] previously loaded to q10-q13 and smashed to q10-q14.
-
- vshr.u64 q15,q8,#26
- vmovn.i64 d16,q8
- vshr.u64 q4,q5,#26
- vmovn.i64 d10,q5
- vadd.i64 q9,q9,q15 @ h3 -> h4
- vbic.i32 d16,#0xfc000000
- vsri.u32 q14,q13,#8 @ base 2^32 -> base 2^26
- vadd.i64 q6,q6,q4 @ h0 -> h1
- vshl.u32 q13,q13,#18
- vbic.i32 d10,#0xfc000000
-
- vshrn.u64 d30,q9,#26
- vmovn.i64 d18,q9
- vshr.u64 q4,q6,#26
- vmovn.i64 d12,q6
- vadd.i64 q7,q7,q4 @ h1 -> h2
- vsri.u32 q13,q12,#14
- vbic.i32 d18,#0xfc000000
- vshl.u32 q12,q12,#12
- vbic.i32 d12,#0xfc000000
-
- vadd.i32 d10,d10,d30
- vshl.u32 d30,d30,#2
- vbic.i32 q13,#0xfc000000
- vshrn.u64 d8,q7,#26
- vmovn.i64 d14,q7
- vaddl.u32 q5,d10,d30 @ h4 -> h0 [widen for a sec]
- vsri.u32 q12,q11,#20
- vadd.i32 d16,d16,d8 @ h2 -> h3
- vshl.u32 q11,q11,#6
- vbic.i32 d14,#0xfc000000
- vbic.i32 q12,#0xfc000000
-
- vshrn.u64 d30,q5,#26 @ re-narrow
- vmovn.i64 d10,q5
- vsri.u32 q11,q10,#26
- vbic.i32 q10,#0xfc000000
- vshr.u32 d8,d16,#26
- vbic.i32 d16,#0xfc000000
- vbic.i32 d10,#0xfc000000
- vadd.i32 d12,d12,d30 @ h0 -> h1
- vadd.i32 d18,d18,d8 @ h3 -> h4
- vbic.i32 q11,#0xfc000000
-
- bhi .Loop_neon
-
-.Lskip_loop:
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ multiply (inp[0:1]+hash) or inp[2:3] by r^2:r^1
-
- add r7,r0,#(48+0*9*4)
- add r6,r0,#(48+1*9*4)
- adds r2,r2,#32
- it ne
- movne r2,#0
- bne .Long_tail
-
- vadd.i32 d25,d24,d14 @ add hash value and move to #hi
- vadd.i32 d21,d20,d10
- vadd.i32 d27,d26,d16
- vadd.i32 d23,d22,d12
- vadd.i32 d29,d28,d18
-
-.Long_tail:
- vld4.32 {d0[1],d1[1],d2[1],d3[1]},[r7]! @ load r^1
- vld4.32 {d0[0],d1[0],d2[0],d3[0]},[r6]! @ load r^2
-
- vadd.i32 d24,d24,d14 @ can be redundant
- vmull.u32 q7,d25,d0
- vadd.i32 d20,d20,d10
- vmull.u32 q5,d21,d0
- vadd.i32 d26,d26,d16
- vmull.u32 q8,d27,d0
- vadd.i32 d22,d22,d12
- vmull.u32 q6,d23,d0
- vadd.i32 d28,d28,d18
- vmull.u32 q9,d29,d0
-
- vmlal.u32 q5,d29,d2
- vld4.32 {d4[1],d5[1],d6[1],d7[1]},[r7]!
- vmlal.u32 q8,d25,d1
- vld4.32 {d4[0],d5[0],d6[0],d7[0]},[r6]!
- vmlal.u32 q6,d21,d1
- vmlal.u32 q9,d27,d1
- vmlal.u32 q7,d23,d1
-
- vmlal.u32 q8,d23,d3
- vld1.32 d8[1],[r7,:32]
- vmlal.u32 q5,d27,d4
- vld1.32 d8[0],[r6,:32]
- vmlal.u32 q9,d25,d3
- vmlal.u32 q6,d29,d4
- vmlal.u32 q7,d21,d3
-
- vmlal.u32 q8,d21,d5
- it ne
- addne r7,r0,#(48+2*9*4)
- vmlal.u32 q5,d25,d6
- it ne
- addne r6,r0,#(48+3*9*4)
- vmlal.u32 q9,d23,d5
- vmlal.u32 q6,d27,d6
- vmlal.u32 q7,d29,d6
-
- vmlal.u32 q8,d29,d8
- vorn q0,q0,q0 @ all-ones, can be redundant
- vmlal.u32 q5,d23,d8
- vshr.u64 q0,q0,#38
- vmlal.u32 q9,d21,d7
- vmlal.u32 q6,d25,d8
- vmlal.u32 q7,d27,d8
-
- beq .Lshort_tail
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ (hash+inp[0:1])*r^4:r^3 and accumulate
-
- vld4.32 {d0[1],d1[1],d2[1],d3[1]},[r7]! @ load r^3
- vld4.32 {d0[0],d1[0],d2[0],d3[0]},[r6]! @ load r^4
-
- vmlal.u32 q7,d24,d0
- vmlal.u32 q5,d20,d0
- vmlal.u32 q8,d26,d0
- vmlal.u32 q6,d22,d0
- vmlal.u32 q9,d28,d0
-
- vmlal.u32 q5,d28,d2
- vld4.32 {d4[1],d5[1],d6[1],d7[1]},[r7]!
- vmlal.u32 q8,d24,d1
- vld4.32 {d4[0],d5[0],d6[0],d7[0]},[r6]!
- vmlal.u32 q6,d20,d1
- vmlal.u32 q9,d26,d1
- vmlal.u32 q7,d22,d1
-
- vmlal.u32 q8,d22,d3
- vld1.32 d8[1],[r7,:32]
- vmlal.u32 q5,d26,d4
- vld1.32 d8[0],[r6,:32]
- vmlal.u32 q9,d24,d3
- vmlal.u32 q6,d28,d4
- vmlal.u32 q7,d20,d3
-
- vmlal.u32 q8,d20,d5
- vmlal.u32 q5,d24,d6
- vmlal.u32 q9,d22,d5
- vmlal.u32 q6,d26,d6
- vmlal.u32 q7,d28,d6
-
- vmlal.u32 q8,d28,d8
- vorn q0,q0,q0 @ all-ones
- vmlal.u32 q5,d22,d8
- vshr.u64 q0,q0,#38
- vmlal.u32 q9,d20,d7
- vmlal.u32 q6,d24,d8
- vmlal.u32 q7,d26,d8
-
-.Lshort_tail:
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ horizontal addition
-
- vadd.i64 d16,d16,d17
- vadd.i64 d10,d10,d11
- vadd.i64 d18,d18,d19
- vadd.i64 d12,d12,d13
- vadd.i64 d14,d14,d15
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ lazy reduction, but without narrowing
-
- vshr.u64 q15,q8,#26
- vand.i64 q8,q8,q0
- vshr.u64 q4,q5,#26
- vand.i64 q5,q5,q0
- vadd.i64 q9,q9,q15 @ h3 -> h4
- vadd.i64 q6,q6,q4 @ h0 -> h1
-
- vshr.u64 q15,q9,#26
- vand.i64 q9,q9,q0
- vshr.u64 q4,q6,#26
- vand.i64 q6,q6,q0
- vadd.i64 q7,q7,q4 @ h1 -> h2
-
- vadd.i64 q5,q5,q15
- vshl.u64 q15,q15,#2
- vshr.u64 q4,q7,#26
- vand.i64 q7,q7,q0
- vadd.i64 q5,q5,q15 @ h4 -> h0
- vadd.i64 q8,q8,q4 @ h2 -> h3
-
- vshr.u64 q15,q5,#26
- vand.i64 q5,q5,q0
- vshr.u64 q4,q8,#26
- vand.i64 q8,q8,q0
- vadd.i64 q6,q6,q15 @ h0 -> h1
- vadd.i64 q9,q9,q4 @ h3 -> h4
-
- cmp r2,#0
- bne .Leven
-
- @@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@@
- @ store hash value
-
- vst4.32 {d10[0],d12[0],d14[0],d16[0]},[r0]!
- vst1.32 {d18[0]},[r0]
-
- vldmia sp!,{d8-d15} @ epilogue
- ldmia sp!,{r4-r7}
-.Lno_data_neon:
- bx lr @ bx lr
-ENDPROC(poly1305_blocks_neon)
-
-.align 5
-ENTRY(poly1305_emit_neon)
- ldr ip,[r0,#36] @ is_base2_26
-
- stmdb sp!,{r4-r11}
-
- tst ip,ip
- beq .Lpoly1305_emit_enter
-
- ldmia r0,{r3-r7}
- eor r8,r8,r8
-
- adds r3,r3,r4,lsl#26 @ base 2^26 -> base 2^32
- mov r4,r4,lsr#6
- adcs r4,r4,r5,lsl#20
- mov r5,r5,lsr#12
- adcs r5,r5,r6,lsl#14
- mov r6,r6,lsr#18
- adcs r6,r6,r7,lsl#8
- adc r7,r8,r7,lsr#24 @ can be partially reduced ...
-
- and r8,r7,#-4 @ ... so reduce
- and r7,r6,#3
- add r8,r8,r8,lsr#2 @ *= 5
- adds r3,r3,r8
- adcs r4,r4,#0
- adcs r5,r5,#0
- adcs r6,r6,#0
- adc r7,r7,#0
-
- adds r8,r3,#5 @ compare to modulus
- adcs r9,r4,#0
- adcs r10,r5,#0
- adcs r11,r6,#0
- adc r7,r7,#0
- tst r7,#4 @ did it carry/borrow?
-
- it ne
- movne r3,r8
- ldr r8,[r2,#0]
- it ne
- movne r4,r9
- ldr r9,[r2,#4]
- it ne
- movne r5,r10
- ldr r10,[r2,#8]
- it ne
- movne r6,r11
- ldr r11,[r2,#12]
-
- adds r3,r3,r8 @ accumulate nonce
- adcs r4,r4,r9
- adcs r5,r5,r10
- adc r6,r6,r11
-
-#ifdef __ARMEB__
- rev r3,r3
- rev r4,r4
- rev r5,r5
- rev r6,r6
-#endif
- str r3,[r1,#0] @ store the result
- str r4,[r1,#4]
- str r5,[r1,#8]
- str r6,[r1,#12]
-
- ldmia sp!,{r4-r11}
- bx lr @ bx lr
-ENDPROC(poly1305_emit_neon)
-
-.align 5
-.Lzeros:
-.long 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0
-#endif