591 lines
11 KiB
ArmAsm
591 lines
11 KiB
ArmAsm
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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/*
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* Poly1305 authenticator algorithm, RFC7539, x64 SSE2 functions
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*
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* Copyright (C) 2015 Martin Willi
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*/
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#include <linux/linkage.h>
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.section .rodata.cst16.ANMASK, "aM", @progbits, 16
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.align 16
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ANMASK: .octa 0x0000000003ffffff0000000003ffffff
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.section .rodata.cst16.ORMASK, "aM", @progbits, 16
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.align 16
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ORMASK: .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 s1 0x00(%rsp)
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#define s2 0x04(%rsp)
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#define s3 0x08(%rsp)
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#define s4 0x0c(%rsp)
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#define m %rsi
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#define h01 %xmm0
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#define h23 %xmm1
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#define h44 %xmm2
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#define t1 %xmm3
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#define t2 %xmm4
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#define t3 %xmm5
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#define t4 %xmm6
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#define mask %xmm7
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#define d0 %r8
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#define d1 %r9
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#define d2 %r10
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#define d3 %r11
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#define d4 %r12
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ENTRY(poly1305_block_sse2)
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# %rdi: Accumulator h[5]
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# %rsi: 16 byte input block m
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# %rdx: Poly1305 key r[5]
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# %rcx: Block count
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# This single block variant tries to improve performance by doing two
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# multiplications in parallel using SSE instructions. There is quite
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# some quardword packing involved, hence the speedup is marginal.
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push %rbx
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push %r12
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sub $0x10,%rsp
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# s1..s4 = r1..r4 * 5
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mov r1,%eax
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lea (%eax,%eax,4),%eax
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mov %eax,s1
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mov r2,%eax
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lea (%eax,%eax,4),%eax
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mov %eax,s2
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mov r3,%eax
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lea (%eax,%eax,4),%eax
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mov %eax,s3
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mov r4,%eax
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lea (%eax,%eax,4),%eax
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mov %eax,s4
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movdqa ANMASK(%rip),mask
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.Ldoblock:
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# h01 = [0, h1, 0, h0]
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# h23 = [0, h3, 0, h2]
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# h44 = [0, h4, 0, h4]
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movd h0,h01
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movd h1,t1
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movd h2,h23
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movd h3,t2
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movd h4,h44
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punpcklqdq t1,h01
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punpcklqdq t2,h23
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punpcklqdq h44,h44
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# h01 += [ (m[3-6] >> 2) & 0x3ffffff, m[0-3] & 0x3ffffff ]
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movd 0x00(m),t1
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movd 0x03(m),t2
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psrld $2,t2
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punpcklqdq t2,t1
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pand mask,t1
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paddd t1,h01
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# h23 += [ (m[9-12] >> 6) & 0x3ffffff, (m[6-9] >> 4) & 0x3ffffff ]
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movd 0x06(m),t1
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movd 0x09(m),t2
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psrld $4,t1
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psrld $6,t2
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punpcklqdq t2,t1
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pand mask,t1
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paddd t1,h23
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# h44 += [ (m[12-15] >> 8) | (1 << 24), (m[12-15] >> 8) | (1 << 24) ]
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mov 0x0c(m),%eax
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shr $8,%eax
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or $0x01000000,%eax
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movd %eax,t1
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pshufd $0xc4,t1,t1
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paddd t1,h44
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# t1[0] = h0 * r0 + h2 * s3
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# t1[1] = h1 * s4 + h3 * s2
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movd r0,t1
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movd s4,t2
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punpcklqdq t2,t1
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pmuludq h01,t1
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movd s3,t2
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movd s2,t3
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punpcklqdq t3,t2
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pmuludq h23,t2
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paddq t2,t1
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# t2[0] = h0 * r1 + h2 * s4
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# t2[1] = h1 * r0 + h3 * s3
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movd r1,t2
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movd r0,t3
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punpcklqdq t3,t2
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pmuludq h01,t2
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movd s4,t3
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movd s3,t4
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punpcklqdq t4,t3
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pmuludq h23,t3
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paddq t3,t2
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# t3[0] = h4 * s1
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# t3[1] = h4 * s2
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movd s1,t3
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movd s2,t4
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punpcklqdq t4,t3
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pmuludq h44,t3
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# d0 = t1[0] + t1[1] + t3[0]
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# d1 = t2[0] + t2[1] + t3[1]
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movdqa t1,t4
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punpcklqdq t2,t4
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punpckhqdq t2,t1
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paddq t4,t1
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paddq t3,t1
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movq t1,d0
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psrldq $8,t1
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movq t1,d1
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# t1[0] = h0 * r2 + h2 * r0
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# t1[1] = h1 * r1 + h3 * s4
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movd r2,t1
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movd r1,t2
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punpcklqdq t2,t1
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pmuludq h01,t1
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movd r0,t2
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movd s4,t3
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punpcklqdq t3,t2
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pmuludq h23,t2
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paddq t2,t1
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# t2[0] = h0 * r3 + h2 * r1
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# t2[1] = h1 * r2 + h3 * r0
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movd r3,t2
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movd r2,t3
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punpcklqdq t3,t2
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pmuludq h01,t2
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movd r1,t3
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movd r0,t4
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punpcklqdq t4,t3
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pmuludq h23,t3
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paddq t3,t2
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# t3[0] = h4 * s3
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# t3[1] = h4 * s4
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movd s3,t3
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movd s4,t4
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punpcklqdq t4,t3
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pmuludq h44,t3
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# d2 = t1[0] + t1[1] + t3[0]
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# d3 = t2[0] + t2[1] + t3[1]
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movdqa t1,t4
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punpcklqdq t2,t4
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punpckhqdq t2,t1
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paddq t4,t1
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paddq t3,t1
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movq t1,d2
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psrldq $8,t1
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movq t1,d3
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# t1[0] = h0 * r4 + h2 * r2
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# t1[1] = h1 * r3 + h3 * r1
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movd r4,t1
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movd r3,t2
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punpcklqdq t2,t1
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pmuludq h01,t1
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movd r2,t2
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movd r1,t3
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punpcklqdq t3,t2
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pmuludq h23,t2
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paddq t2,t1
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# t3[0] = h4 * r0
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movd r0,t3
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pmuludq h44,t3
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# d4 = t1[0] + t1[1] + t3[0]
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movdqa t1,t4
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psrldq $8,t4
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paddq t4,t1
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paddq t3,t1
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movq t1,d4
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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
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add %rax,%rbx
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# h4 = d4 & 0x3ffffff
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mov d4,%rax
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and $0x3ffffff,%eax
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mov %eax,h4
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# h1 += h0 >> 26
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mov %rbx,%rax
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shr $26,%rax
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add %eax,h1
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# h0 = h0 & 0x3ffffff
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andl $0x3ffffff,%ebx
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mov %ebx,h0
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add $0x10,m
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dec %rcx
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jnz .Ldoblock
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# Zeroing of key material
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mov %rcx,0x00(%rsp)
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mov %rcx,0x08(%rsp)
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add $0x10,%rsp
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pop %r12
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pop %rbx
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ret
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ENDPROC(poly1305_block_sse2)
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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 hc0 %xmm0
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#define hc1 %xmm1
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#define hc2 %xmm2
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#define hc3 %xmm5
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#define hc4 %xmm6
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#define ru0 %xmm7
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#define ru1 %xmm8
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#define ru2 %xmm9
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#define ru3 %xmm10
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#define ru4 %xmm11
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#define sv1 %xmm12
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#define sv2 %xmm13
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#define sv3 %xmm14
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#define sv4 %xmm15
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#undef d0
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#define d0 %r13
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ENTRY(poly1305_2block_sse2)
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# %rdi: Accumulator h[5]
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# %rsi: 16 byte input block m
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# %rdx: Poly1305 key r[5]
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# %rcx: Doubleblock count
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# %r8: Poly1305 derived key r^2 u[5]
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# This two-block variant further improves performance by using loop
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# unrolled block processing. This is more straight forward and does
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# less byte shuffling, but requires a second Poly1305 key r^2:
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# h = (h + m) * r => h = (h + m1) * r^2 + m2 * r
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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
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movd u0,ru0
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movd r0,t1
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punpcklqdq t1,ru0
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# combine r1,u1 and s1=r1*5,v1=u1*5
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movd u1,ru1
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movd r1,t1
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punpcklqdq t1,ru1
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movdqa ru1,sv1
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pslld $2,sv1
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paddd ru1,sv1
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# combine r2,u2 and s2=r2*5,v2=u2*5
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movd u2,ru2
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movd r2,t1
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punpcklqdq t1,ru2
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movdqa ru2,sv2
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pslld $2,sv2
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paddd ru2,sv2
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# combine r3,u3 and s3=r3*5,v3=u3*5
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movd u3,ru3
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movd r3,t1
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punpcklqdq t1,ru3
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movdqa ru3,sv3
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pslld $2,sv3
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paddd ru3,sv3
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# combine r4,u4 and s4=r4*5,v4=u4*5
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movd u4,ru4
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movd r4,t1
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punpcklqdq t1,ru4
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movdqa ru4,sv4
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pslld $2,sv4
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paddd ru4,sv4
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.Ldoblock2:
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# hc0 = [ m[16-19] & 0x3ffffff, h0 + m[0-3] & 0x3ffffff ]
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movd 0x00(m),hc0
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movd 0x10(m),t1
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punpcklqdq t1,hc0
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pand ANMASK(%rip),hc0
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movd h0,t1
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paddd t1,hc0
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|
# hc1 = [ (m[19-22] >> 2) & 0x3ffffff, h1 + (m[3-6] >> 2) & 0x3ffffff ]
|
||
|
|
movd 0x03(m),hc1
|
||
|
|
movd 0x13(m),t1
|
||
|
|
punpcklqdq t1,hc1
|
||
|
|
psrld $2,hc1
|
||
|
|
pand ANMASK(%rip),hc1
|
||
|
|
movd h1,t1
|
||
|
|
paddd t1,hc1
|
||
|
|
# hc2 = [ (m[22-25] >> 4) & 0x3ffffff, h2 + (m[6-9] >> 4) & 0x3ffffff ]
|
||
|
|
movd 0x06(m),hc2
|
||
|
|
movd 0x16(m),t1
|
||
|
|
punpcklqdq t1,hc2
|
||
|
|
psrld $4,hc2
|
||
|
|
pand ANMASK(%rip),hc2
|
||
|
|
movd h2,t1
|
||
|
|
paddd t1,hc2
|
||
|
|
# hc3 = [ (m[25-28] >> 6) & 0x3ffffff, h3 + (m[9-12] >> 6) & 0x3ffffff ]
|
||
|
|
movd 0x09(m),hc3
|
||
|
|
movd 0x19(m),t1
|
||
|
|
punpcklqdq t1,hc3
|
||
|
|
psrld $6,hc3
|
||
|
|
pand ANMASK(%rip),hc3
|
||
|
|
movd h3,t1
|
||
|
|
paddd t1,hc3
|
||
|
|
# hc4 = [ (m[28-31] >> 8) | (1<<24), h4 + (m[12-15] >> 8) | (1<<24) ]
|
||
|
|
movd 0x0c(m),hc4
|
||
|
|
movd 0x1c(m),t1
|
||
|
|
punpcklqdq t1,hc4
|
||
|
|
psrld $8,hc4
|
||
|
|
por ORMASK(%rip),hc4
|
||
|
|
movd h4,t1
|
||
|
|
paddd t1,hc4
|
||
|
|
|
||
|
|
# t1 = [ hc0[1] * r0, hc0[0] * u0 ]
|
||
|
|
movdqa ru0,t1
|
||
|
|
pmuludq hc0,t1
|
||
|
|
# t1 += [ hc1[1] * s4, hc1[0] * v4 ]
|
||
|
|
movdqa sv4,t2
|
||
|
|
pmuludq hc1,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc2[1] * s3, hc2[0] * v3 ]
|
||
|
|
movdqa sv3,t2
|
||
|
|
pmuludq hc2,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc3[1] * s2, hc3[0] * v2 ]
|
||
|
|
movdqa sv2,t2
|
||
|
|
pmuludq hc3,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc4[1] * s1, hc4[0] * v1 ]
|
||
|
|
movdqa sv1,t2
|
||
|
|
pmuludq hc4,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# d0 = t1[0] + t1[1]
|
||
|
|
movdqa t1,t2
|
||
|
|
psrldq $8,t2
|
||
|
|
paddq t2,t1
|
||
|
|
movq t1,d0
|
||
|
|
|
||
|
|
# t1 = [ hc0[1] * r1, hc0[0] * u1 ]
|
||
|
|
movdqa ru1,t1
|
||
|
|
pmuludq hc0,t1
|
||
|
|
# t1 += [ hc1[1] * r0, hc1[0] * u0 ]
|
||
|
|
movdqa ru0,t2
|
||
|
|
pmuludq hc1,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc2[1] * s4, hc2[0] * v4 ]
|
||
|
|
movdqa sv4,t2
|
||
|
|
pmuludq hc2,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc3[1] * s3, hc3[0] * v3 ]
|
||
|
|
movdqa sv3,t2
|
||
|
|
pmuludq hc3,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc4[1] * s2, hc4[0] * v2 ]
|
||
|
|
movdqa sv2,t2
|
||
|
|
pmuludq hc4,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# d1 = t1[0] + t1[1]
|
||
|
|
movdqa t1,t2
|
||
|
|
psrldq $8,t2
|
||
|
|
paddq t2,t1
|
||
|
|
movq t1,d1
|
||
|
|
|
||
|
|
# t1 = [ hc0[1] * r2, hc0[0] * u2 ]
|
||
|
|
movdqa ru2,t1
|
||
|
|
pmuludq hc0,t1
|
||
|
|
# t1 += [ hc1[1] * r1, hc1[0] * u1 ]
|
||
|
|
movdqa ru1,t2
|
||
|
|
pmuludq hc1,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc2[1] * r0, hc2[0] * u0 ]
|
||
|
|
movdqa ru0,t2
|
||
|
|
pmuludq hc2,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc3[1] * s4, hc3[0] * v4 ]
|
||
|
|
movdqa sv4,t2
|
||
|
|
pmuludq hc3,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc4[1] * s3, hc4[0] * v3 ]
|
||
|
|
movdqa sv3,t2
|
||
|
|
pmuludq hc4,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# d2 = t1[0] + t1[1]
|
||
|
|
movdqa t1,t2
|
||
|
|
psrldq $8,t2
|
||
|
|
paddq t2,t1
|
||
|
|
movq t1,d2
|
||
|
|
|
||
|
|
# t1 = [ hc0[1] * r3, hc0[0] * u3 ]
|
||
|
|
movdqa ru3,t1
|
||
|
|
pmuludq hc0,t1
|
||
|
|
# t1 += [ hc1[1] * r2, hc1[0] * u2 ]
|
||
|
|
movdqa ru2,t2
|
||
|
|
pmuludq hc1,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc2[1] * r1, hc2[0] * u1 ]
|
||
|
|
movdqa ru1,t2
|
||
|
|
pmuludq hc2,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc3[1] * r0, hc3[0] * u0 ]
|
||
|
|
movdqa ru0,t2
|
||
|
|
pmuludq hc3,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc4[1] * s4, hc4[0] * v4 ]
|
||
|
|
movdqa sv4,t2
|
||
|
|
pmuludq hc4,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# d3 = t1[0] + t1[1]
|
||
|
|
movdqa t1,t2
|
||
|
|
psrldq $8,t2
|
||
|
|
paddq t2,t1
|
||
|
|
movq t1,d3
|
||
|
|
|
||
|
|
# t1 = [ hc0[1] * r4, hc0[0] * u4 ]
|
||
|
|
movdqa ru4,t1
|
||
|
|
pmuludq hc0,t1
|
||
|
|
# t1 += [ hc1[1] * r3, hc1[0] * u3 ]
|
||
|
|
movdqa ru3,t2
|
||
|
|
pmuludq hc1,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc2[1] * r2, hc2[0] * u2 ]
|
||
|
|
movdqa ru2,t2
|
||
|
|
pmuludq hc2,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc3[1] * r1, hc3[0] * u1 ]
|
||
|
|
movdqa ru1,t2
|
||
|
|
pmuludq hc3,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# t1 += [ hc4[1] * r0, hc4[0] * u0 ]
|
||
|
|
movdqa ru0,t2
|
||
|
|
pmuludq hc4,t2
|
||
|
|
paddq t2,t1
|
||
|
|
# d4 = t1[0] + t1[1]
|
||
|
|
movdqa t1,t2
|
||
|
|
psrldq $8,t2
|
||
|
|
paddq t2,t1
|
||
|
|
movq t1,d4
|
||
|
|
|
||
|
|
# Now do a partial reduction mod (2^130)-5, carrying h0 -> h1 -> h2 ->
|
||
|
|
# h3 -> h4 -> h0 -> h1 to get h0,h2,h3,h4 < 2^26 and h1 < 2^26 + a small
|
||
|
|
# amount. Careful: we must not assume the carry bits 'd0 >> 26',
|
||
|
|
# 'd1 >> 26', 'd2 >> 26', 'd3 >> 26', and '(d4 >> 26) * 5' fit in 32-bit
|
||
|
|
# integers. It's true in a single-block implementation, but not here.
|
||
|
|
|
||
|
|
# d1 += d0 >> 26
|
||
|
|
mov d0,%rax
|
||
|
|
shr $26,%rax
|
||
|
|
add %rax,d1
|
||
|
|
# h0 = d0 & 0x3ffffff
|
||
|
|
mov d0,%rbx
|
||
|
|
and $0x3ffffff,%ebx
|
||
|
|
|
||
|
|
# d2 += d1 >> 26
|
||
|
|
mov d1,%rax
|
||
|
|
shr $26,%rax
|
||
|
|
add %rax,d2
|
||
|
|
# h1 = d1 & 0x3ffffff
|
||
|
|
mov d1,%rax
|
||
|
|
and $0x3ffffff,%eax
|
||
|
|
mov %eax,h1
|
||
|
|
|
||
|
|
# d3 += d2 >> 26
|
||
|
|
mov d2,%rax
|
||
|
|
shr $26,%rax
|
||
|
|
add %rax,d3
|
||
|
|
# h2 = d2 & 0x3ffffff
|
||
|
|
mov d2,%rax
|
||
|
|
and $0x3ffffff,%eax
|
||
|
|
mov %eax,h2
|
||
|
|
|
||
|
|
# d4 += d3 >> 26
|
||
|
|
mov d3,%rax
|
||
|
|
shr $26,%rax
|
||
|
|
add %rax,d4
|
||
|
|
# h3 = d3 & 0x3ffffff
|
||
|
|
mov d3,%rax
|
||
|
|
and $0x3ffffff,%eax
|
||
|
|
mov %eax,h3
|
||
|
|
|
||
|
|
# h0 += (d4 >> 26) * 5
|
||
|
|
mov d4,%rax
|
||
|
|
shr $26,%rax
|
||
|
|
lea (%rax,%rax,4),%rax
|
||
|
|
add %rax,%rbx
|
||
|
|
# 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 $0x20,m
|
||
|
|
dec %rcx
|
||
|
|
jnz .Ldoblock2
|
||
|
|
|
||
|
|
pop %r13
|
||
|
|
pop %r12
|
||
|
|
pop %rbx
|
||
|
|
ret
|
||
|
|
ENDPROC(poly1305_2block_sse2)
|