395 lines
9.6 KiB
ArmAsm
395 lines
9.6 KiB
ArmAsm
/*
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* Poly1305 authenticator algorithm, RFC7539, x64 AVX2 functions
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*
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* Copyright (C) 2015 Martin Willi
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*
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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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*/
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#include <linux/linkage.h>
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.section .rodata.cst32.ANMASK, "aM", @progbits, 32
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.align 32
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ANMASK: .octa 0x0000000003ffffff0000000003ffffff
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.octa 0x0000000003ffffff0000000003ffffff
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.section .rodata.cst32.ORMASK, "aM", @progbits, 32
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.align 32
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ORMASK: .octa 0x00000000010000000000000001000000
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.octa 0x00000000010000000000000001000000
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.text
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#define h0 0x00(%rdi)
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#define h1 0x04(%rdi)
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#define h2 0x08(%rdi)
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#define h3 0x0c(%rdi)
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#define h4 0x10(%rdi)
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#define r0 0x00(%rdx)
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#define r1 0x04(%rdx)
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#define r2 0x08(%rdx)
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#define r3 0x0c(%rdx)
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#define r4 0x10(%rdx)
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#define u0 0x00(%r8)
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#define u1 0x04(%r8)
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#define u2 0x08(%r8)
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#define u3 0x0c(%r8)
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#define u4 0x10(%r8)
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#define w0 0x14(%r8)
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#define w1 0x18(%r8)
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#define w2 0x1c(%r8)
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#define w3 0x20(%r8)
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#define w4 0x24(%r8)
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#define y0 0x28(%r8)
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#define y1 0x2c(%r8)
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#define y2 0x30(%r8)
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#define y3 0x34(%r8)
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#define y4 0x38(%r8)
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#define m %rsi
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#define hc0 %ymm0
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#define hc1 %ymm1
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#define hc2 %ymm2
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#define hc3 %ymm3
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#define hc4 %ymm4
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#define hc0x %xmm0
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#define hc1x %xmm1
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#define hc2x %xmm2
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#define hc3x %xmm3
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#define hc4x %xmm4
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#define t1 %ymm5
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#define t2 %ymm6
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#define t1x %xmm5
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#define t2x %xmm6
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#define ruwy0 %ymm7
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#define ruwy1 %ymm8
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#define ruwy2 %ymm9
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#define ruwy3 %ymm10
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#define ruwy4 %ymm11
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#define ruwy0x %xmm7
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#define ruwy1x %xmm8
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#define ruwy2x %xmm9
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#define ruwy3x %xmm10
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#define ruwy4x %xmm11
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#define svxz1 %ymm12
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#define svxz2 %ymm13
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#define svxz3 %ymm14
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#define svxz4 %ymm15
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#define d0 %r9
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#define d1 %r10
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#define d2 %r11
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#define d3 %r12
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#define d4 %r13
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ENTRY(poly1305_4block_avx2)
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# %rdi: Accumulator h[5]
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# %rsi: 64 byte input block m
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# %rdx: Poly1305 key r[5]
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# %rcx: Quadblock count
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# %r8: Poly1305 derived key r^2 u[5], r^3 w[5], r^4 y[5],
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# This four-block variant uses loop unrolled block processing. It
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# requires 4 Poly1305 keys: r, r^2, r^3 and r^4:
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# h = (h + m) * r => h = (h + m1) * r^4 + m2 * r^3 + m3 * r^2 + m4 * r
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vzeroupper
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push %rbx
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push %r12
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push %r13
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# combine r0,u0,w0,y0
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vmovd y0,ruwy0x
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vmovd w0,t1x
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vpunpcklqdq t1,ruwy0,ruwy0
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vmovd u0,t1x
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vmovd r0,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy0,ruwy0
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# combine r1,u1,w1,y1 and s1=r1*5,v1=u1*5,x1=w1*5,z1=y1*5
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vmovd y1,ruwy1x
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vmovd w1,t1x
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vpunpcklqdq t1,ruwy1,ruwy1
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vmovd u1,t1x
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vmovd r1,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy1,ruwy1
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vpslld $2,ruwy1,svxz1
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vpaddd ruwy1,svxz1,svxz1
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# combine r2,u2,w2,y2 and s2=r2*5,v2=u2*5,x2=w2*5,z2=y2*5
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vmovd y2,ruwy2x
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vmovd w2,t1x
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vpunpcklqdq t1,ruwy2,ruwy2
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vmovd u2,t1x
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vmovd r2,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy2,ruwy2
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vpslld $2,ruwy2,svxz2
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vpaddd ruwy2,svxz2,svxz2
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# combine r3,u3,w3,y3 and s3=r3*5,v3=u3*5,x3=w3*5,z3=y3*5
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vmovd y3,ruwy3x
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vmovd w3,t1x
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vpunpcklqdq t1,ruwy3,ruwy3
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vmovd u3,t1x
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vmovd r3,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy3,ruwy3
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vpslld $2,ruwy3,svxz3
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vpaddd ruwy3,svxz3,svxz3
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# combine r4,u4,w4,y4 and s4=r4*5,v4=u4*5,x4=w4*5,z4=y4*5
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vmovd y4,ruwy4x
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vmovd w4,t1x
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vpunpcklqdq t1,ruwy4,ruwy4
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vmovd u4,t1x
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vmovd r4,t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,ruwy4,ruwy4
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vpslld $2,ruwy4,svxz4
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vpaddd ruwy4,svxz4,svxz4
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.Ldoblock4:
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# hc0 = [m[48-51] & 0x3ffffff, m[32-35] & 0x3ffffff,
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# m[16-19] & 0x3ffffff, m[ 0- 3] & 0x3ffffff + h0]
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vmovd 0x00(m),hc0x
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vmovd 0x10(m),t1x
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vpunpcklqdq t1,hc0,hc0
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vmovd 0x20(m),t1x
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vmovd 0x30(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc0,hc0
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vpand ANMASK(%rip),hc0,hc0
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vmovd h0,t1x
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vpaddd t1,hc0,hc0
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# hc1 = [(m[51-54] >> 2) & 0x3ffffff, (m[35-38] >> 2) & 0x3ffffff,
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# (m[19-22] >> 2) & 0x3ffffff, (m[ 3- 6] >> 2) & 0x3ffffff + h1]
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vmovd 0x03(m),hc1x
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vmovd 0x13(m),t1x
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vpunpcklqdq t1,hc1,hc1
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vmovd 0x23(m),t1x
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vmovd 0x33(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc1,hc1
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vpsrld $2,hc1,hc1
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vpand ANMASK(%rip),hc1,hc1
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vmovd h1,t1x
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vpaddd t1,hc1,hc1
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# hc2 = [(m[54-57] >> 4) & 0x3ffffff, (m[38-41] >> 4) & 0x3ffffff,
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# (m[22-25] >> 4) & 0x3ffffff, (m[ 6- 9] >> 4) & 0x3ffffff + h2]
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vmovd 0x06(m),hc2x
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vmovd 0x16(m),t1x
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vpunpcklqdq t1,hc2,hc2
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vmovd 0x26(m),t1x
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vmovd 0x36(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc2,hc2
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vpsrld $4,hc2,hc2
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vpand ANMASK(%rip),hc2,hc2
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vmovd h2,t1x
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vpaddd t1,hc2,hc2
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# hc3 = [(m[57-60] >> 6) & 0x3ffffff, (m[41-44] >> 6) & 0x3ffffff,
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# (m[25-28] >> 6) & 0x3ffffff, (m[ 9-12] >> 6) & 0x3ffffff + h3]
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vmovd 0x09(m),hc3x
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vmovd 0x19(m),t1x
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vpunpcklqdq t1,hc3,hc3
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vmovd 0x29(m),t1x
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vmovd 0x39(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc3,hc3
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vpsrld $6,hc3,hc3
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vpand ANMASK(%rip),hc3,hc3
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vmovd h3,t1x
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vpaddd t1,hc3,hc3
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# hc4 = [(m[60-63] >> 8) | (1<<24), (m[44-47] >> 8) | (1<<24),
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# (m[28-31] >> 8) | (1<<24), (m[12-15] >> 8) | (1<<24) + h4]
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vmovd 0x0c(m),hc4x
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vmovd 0x1c(m),t1x
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vpunpcklqdq t1,hc4,hc4
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vmovd 0x2c(m),t1x
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vmovd 0x3c(m),t2x
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vpunpcklqdq t2,t1,t1
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vperm2i128 $0x20,t1,hc4,hc4
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vpsrld $8,hc4,hc4
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vpor ORMASK(%rip),hc4,hc4
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vmovd h4,t1x
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vpaddd t1,hc4,hc4
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# t1 = [ hc0[3] * r0, hc0[2] * u0, hc0[1] * w0, hc0[0] * y0 ]
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vpmuludq hc0,ruwy0,t1
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# t1 += [ hc1[3] * s4, hc1[2] * v4, hc1[1] * x4, hc1[0] * z4 ]
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vpmuludq hc1,svxz4,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * s3, hc2[2] * v3, hc2[1] * x3, hc2[0] * z3 ]
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vpmuludq hc2,svxz3,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * s2, hc3[2] * v2, hc3[1] * x2, hc3[0] * z2 ]
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vpmuludq hc3,svxz2,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * s1, hc4[2] * v1, hc4[1] * x1, hc4[0] * z1 ]
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vpmuludq hc4,svxz1,t2
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vpaddq t2,t1,t1
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# d0 = t1[0] + t1[1] + t[2] + t[3]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d0
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# t1 = [ hc0[3] * r1, hc0[2] * u1,hc0[1] * w1, hc0[0] * y1 ]
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vpmuludq hc0,ruwy1,t1
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# t1 += [ hc1[3] * r0, hc1[2] * u0, hc1[1] * w0, hc1[0] * y0 ]
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vpmuludq hc1,ruwy0,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * s4, hc2[2] * v4, hc2[1] * x4, hc2[0] * z4 ]
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vpmuludq hc2,svxz4,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * s3, hc3[2] * v3, hc3[1] * x3, hc3[0] * z3 ]
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vpmuludq hc3,svxz3,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * s2, hc4[2] * v2, hc4[1] * x2, hc4[0] * z2 ]
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vpmuludq hc4,svxz2,t2
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vpaddq t2,t1,t1
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# d1 = t1[0] + t1[1] + t1[3] + t1[4]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d1
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# t1 = [ hc0[3] * r2, hc0[2] * u2, hc0[1] * w2, hc0[0] * y2 ]
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vpmuludq hc0,ruwy2,t1
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# t1 += [ hc1[3] * r1, hc1[2] * u1, hc1[1] * w1, hc1[0] * y1 ]
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vpmuludq hc1,ruwy1,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * r0, hc2[2] * u0, hc2[1] * w0, hc2[0] * y0 ]
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vpmuludq hc2,ruwy0,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * s4, hc3[2] * v4, hc3[1] * x4, hc3[0] * z4 ]
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vpmuludq hc3,svxz4,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * s3, hc4[2] * v3, hc4[1] * x3, hc4[0] * z3 ]
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vpmuludq hc4,svxz3,t2
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vpaddq t2,t1,t1
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# d2 = t1[0] + t1[1] + t1[2] + t1[3]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d2
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# t1 = [ hc0[3] * r3, hc0[2] * u3, hc0[1] * w3, hc0[0] * y3 ]
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vpmuludq hc0,ruwy3,t1
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# t1 += [ hc1[3] * r2, hc1[2] * u2, hc1[1] * w2, hc1[0] * y2 ]
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vpmuludq hc1,ruwy2,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * r1, hc2[2] * u1, hc2[1] * w1, hc2[0] * y1 ]
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vpmuludq hc2,ruwy1,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * r0, hc3[2] * u0, hc3[1] * w0, hc3[0] * y0 ]
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vpmuludq hc3,ruwy0,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * s4, hc4[2] * v4, hc4[1] * x4, hc4[0] * z4 ]
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vpmuludq hc4,svxz4,t2
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vpaddq t2,t1,t1
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# d3 = t1[0] + t1[1] + t1[2] + t1[3]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d3
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# t1 = [ hc0[3] * r4, hc0[2] * u4, hc0[1] * w4, hc0[0] * y4 ]
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vpmuludq hc0,ruwy4,t1
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# t1 += [ hc1[3] * r3, hc1[2] * u3, hc1[1] * w3, hc1[0] * y3 ]
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vpmuludq hc1,ruwy3,t2
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vpaddq t2,t1,t1
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# t1 += [ hc2[3] * r2, hc2[2] * u2, hc2[1] * w2, hc2[0] * y2 ]
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vpmuludq hc2,ruwy2,t2
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vpaddq t2,t1,t1
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# t1 += [ hc3[3] * r1, hc3[2] * u1, hc3[1] * w1, hc3[0] * y1 ]
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vpmuludq hc3,ruwy1,t2
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vpaddq t2,t1,t1
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# t1 += [ hc4[3] * r0, hc4[2] * u0, hc4[1] * w0, hc4[0] * y0 ]
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vpmuludq hc4,ruwy0,t2
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vpaddq t2,t1,t1
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# d4 = t1[0] + t1[1] + t1[2] + t1[3]
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vpermq $0xee,t1,t2
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vpaddq t2,t1,t1
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vpsrldq $8,t1,t2
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vpaddq t2,t1,t1
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vmovq t1x,d4
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# Now do a partial reduction mod (2^130)-5, carrying h0 -> h1 -> h2 ->
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# h3 -> h4 -> h0 -> h1 to get h0,h2,h3,h4 < 2^26 and h1 < 2^26 + a small
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# amount. Careful: we must not assume the carry bits 'd0 >> 26',
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# 'd1 >> 26', 'd2 >> 26', 'd3 >> 26', and '(d4 >> 26) * 5' fit in 32-bit
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# integers. It's true in a single-block implementation, but not here.
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# d1 += d0 >> 26
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mov d0,%rax
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shr $26,%rax
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add %rax,d1
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# h0 = d0 & 0x3ffffff
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mov d0,%rbx
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and $0x3ffffff,%ebx
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# d2 += d1 >> 26
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mov d1,%rax
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shr $26,%rax
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add %rax,d2
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# h1 = d1 & 0x3ffffff
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mov d1,%rax
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and $0x3ffffff,%eax
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mov %eax,h1
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# d3 += d2 >> 26
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mov d2,%rax
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shr $26,%rax
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add %rax,d3
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# h2 = d2 & 0x3ffffff
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mov d2,%rax
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and $0x3ffffff,%eax
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mov %eax,h2
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# d4 += d3 >> 26
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mov d3,%rax
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shr $26,%rax
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add %rax,d4
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# h3 = d3 & 0x3ffffff
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mov d3,%rax
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and $0x3ffffff,%eax
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mov %eax,h3
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# h0 += (d4 >> 26) * 5
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mov d4,%rax
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shr $26,%rax
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lea (%rax,%rax,4),%rax
|
|
add %rax,%rbx
|
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# h4 = d4 & 0x3ffffff
|
|
mov d4,%rax
|
|
and $0x3ffffff,%eax
|
|
mov %eax,h4
|
|
|
|
# h1 += h0 >> 26
|
|
mov %rbx,%rax
|
|
shr $26,%rax
|
|
add %eax,h1
|
|
# h0 = h0 & 0x3ffffff
|
|
andl $0x3ffffff,%ebx
|
|
mov %ebx,h0
|
|
|
|
add $0x40,m
|
|
dec %rcx
|
|
jnz .Ldoblock4
|
|
|
|
vzeroupper
|
|
pop %r13
|
|
pop %r12
|
|
pop %rbx
|
|
ret
|
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ENDPROC(poly1305_4block_avx2)
|