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|
;;
;; Copyright (c) 2009-2019, Intel Corporation
;;
;; Redistribution and use in source and binary forms, with or without
;; modification, are permitted provided that the following conditions are met:
;;
;; * Redistributions of source code must retain the above copyright notice,
;; this list of conditions and the following disclaimer.
;; * Redistributions in binary form must reproduce the above copyright
;; notice, this list of conditions and the following disclaimer in the
;; documentation and/or other materials provided with the distribution.
;; * Neither the name of Intel Corporation nor the names of its contributors
;; may be used to endorse or promote products derived from this software
;; without specific prior written permission.
;;
;; THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
;; AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
;; IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
;; DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE
;; FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
;; DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
;; SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
;; CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
;; OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
;; OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
;;
%include "include/os.asm"
%include "include/reg_sizes.asm"
extern lookup_8bit_sse
section .data
default rel
align 64
S0:
db 0x3e,0x72,0x5b,0x47,0xca,0xe0,0x00,0x33,0x04,0xd1,0x54,0x98,0x09,0xb9,0x6d,0xcb
db 0x7b,0x1b,0xf9,0x32,0xaf,0x9d,0x6a,0xa5,0xb8,0x2d,0xfc,0x1d,0x08,0x53,0x03,0x90
db 0x4d,0x4e,0x84,0x99,0xe4,0xce,0xd9,0x91,0xdd,0xb6,0x85,0x48,0x8b,0x29,0x6e,0xac
db 0xcd,0xc1,0xf8,0x1e,0x73,0x43,0x69,0xc6,0xb5,0xbd,0xfd,0x39,0x63,0x20,0xd4,0x38
db 0x76,0x7d,0xb2,0xa7,0xcf,0xed,0x57,0xc5,0xf3,0x2c,0xbb,0x14,0x21,0x06,0x55,0x9b
db 0xe3,0xef,0x5e,0x31,0x4f,0x7f,0x5a,0xa4,0x0d,0x82,0x51,0x49,0x5f,0xba,0x58,0x1c
db 0x4a,0x16,0xd5,0x17,0xa8,0x92,0x24,0x1f,0x8c,0xff,0xd8,0xae,0x2e,0x01,0xd3,0xad
db 0x3b,0x4b,0xda,0x46,0xeb,0xc9,0xde,0x9a,0x8f,0x87,0xd7,0x3a,0x80,0x6f,0x2f,0xc8
db 0xb1,0xb4,0x37,0xf7,0x0a,0x22,0x13,0x28,0x7c,0xcc,0x3c,0x89,0xc7,0xc3,0x96,0x56
db 0x07,0xbf,0x7e,0xf0,0x0b,0x2b,0x97,0x52,0x35,0x41,0x79,0x61,0xa6,0x4c,0x10,0xfe
db 0xbc,0x26,0x95,0x88,0x8a,0xb0,0xa3,0xfb,0xc0,0x18,0x94,0xf2,0xe1,0xe5,0xe9,0x5d
db 0xd0,0xdc,0x11,0x66,0x64,0x5c,0xec,0x59,0x42,0x75,0x12,0xf5,0x74,0x9c,0xaa,0x23
db 0x0e,0x86,0xab,0xbe,0x2a,0x02,0xe7,0x67,0xe6,0x44,0xa2,0x6c,0xc2,0x93,0x9f,0xf1
db 0xf6,0xfa,0x36,0xd2,0x50,0x68,0x9e,0x62,0x71,0x15,0x3d,0xd6,0x40,0xc4,0xe2,0x0f
db 0x8e,0x83,0x77,0x6b,0x25,0x05,0x3f,0x0c,0x30,0xea,0x70,0xb7,0xa1,0xe8,0xa9,0x65
db 0x8d,0x27,0x1a,0xdb,0x81,0xb3,0xa0,0xf4,0x45,0x7a,0x19,0xdf,0xee,0x78,0x34,0x60
S1:
db 0x55,0xc2,0x63,0x71,0x3b,0xc8,0x47,0x86,0x9f,0x3c,0xda,0x5b,0x29,0xaa,0xfd,0x77
db 0x8c,0xc5,0x94,0x0c,0xa6,0x1a,0x13,0x00,0xe3,0xa8,0x16,0x72,0x40,0xf9,0xf8,0x42
db 0x44,0x26,0x68,0x96,0x81,0xd9,0x45,0x3e,0x10,0x76,0xc6,0xa7,0x8b,0x39,0x43,0xe1
db 0x3a,0xb5,0x56,0x2a,0xc0,0x6d,0xb3,0x05,0x22,0x66,0xbf,0xdc,0x0b,0xfa,0x62,0x48
db 0xdd,0x20,0x11,0x06,0x36,0xc9,0xc1,0xcf,0xf6,0x27,0x52,0xbb,0x69,0xf5,0xd4,0x87
db 0x7f,0x84,0x4c,0xd2,0x9c,0x57,0xa4,0xbc,0x4f,0x9a,0xdf,0xfe,0xd6,0x8d,0x7a,0xeb
db 0x2b,0x53,0xd8,0x5c,0xa1,0x14,0x17,0xfb,0x23,0xd5,0x7d,0x30,0x67,0x73,0x08,0x09
db 0xee,0xb7,0x70,0x3f,0x61,0xb2,0x19,0x8e,0x4e,0xe5,0x4b,0x93,0x8f,0x5d,0xdb,0xa9
db 0xad,0xf1,0xae,0x2e,0xcb,0x0d,0xfc,0xf4,0x2d,0x46,0x6e,0x1d,0x97,0xe8,0xd1,0xe9
db 0x4d,0x37,0xa5,0x75,0x5e,0x83,0x9e,0xab,0x82,0x9d,0xb9,0x1c,0xe0,0xcd,0x49,0x89
db 0x01,0xb6,0xbd,0x58,0x24,0xa2,0x5f,0x38,0x78,0x99,0x15,0x90,0x50,0xb8,0x95,0xe4
db 0xd0,0x91,0xc7,0xce,0xed,0x0f,0xb4,0x6f,0xa0,0xcc,0xf0,0x02,0x4a,0x79,0xc3,0xde
db 0xa3,0xef,0xea,0x51,0xe6,0x6b,0x18,0xec,0x1b,0x2c,0x80,0xf7,0x74,0xe7,0xff,0x21
db 0x5a,0x6a,0x54,0x1e,0x41,0x31,0x92,0x35,0xc4,0x33,0x07,0x0a,0xba,0x7e,0x0e,0x34
db 0x88,0xb1,0x98,0x7c,0xf3,0x3d,0x60,0x6c,0x7b,0xca,0xd3,0x1f,0x32,0x65,0x04,0x28
db 0x64,0xbe,0x85,0x9b,0x2f,0x59,0x8a,0xd7,0xb0,0x25,0xac,0xaf,0x12,0x03,0xe2,0xf2
EK_d:
dw 0x44D7, 0x26BC, 0x626B, 0x135E, 0x5789, 0x35E2, 0x7135, 0x09AF,
dw 0x4D78, 0x2F13, 0x6BC4, 0x1AF1, 0x5E26, 0x3C4D, 0x789A, 0x47AC
%ifdef LINUX
section .note.GNU-stack noalloc noexec nowrite progbits
%endif
section .text
%define OFFSET_FR1 (16*4)
%define OFFSET_FR2 (17*4)
%define OFFSET_BRC_X0 (18*4)
%define OFFSET_BRC_X1 (19*4)
%define OFFSET_BRC_X2 (20*4)
%define OFFSET_BRC_X3 (21*4)
;
; BITS_REORG()
;
; params
; %1 - round number
; uses
; eax, ebx, ecx, edx
; return
; updates r12d, r13d, r14d, r15d
;
%macro BITS_REORG 1
;
; r12d = LFSR_S15
; eax = LFSR_S14
; r13d = LFSR_S11
; ebx = LFSR_S9
; r14d = LFSR_S7
; ecx = LFSR_S5
; r15d = LFSR_S2
; edx = LFSR_S0
mov r12d, [rsi + ((15 + %1) % 16)*4]
mov eax, [rsi + ((14 + %1) % 16)*4]
mov r13d, [rsi + ((11 + %1) % 16)*4]
mov ebx, [rsi + (( 9 + %1) % 16)*4]
mov r14d, [rsi + (( 7 + %1) % 16)*4]
mov ecx, [rsi + (( 5 + %1) % 16)*4]
mov r15d, [rsi + (( 2 + %1) % 16)*4]
mov edx, [rsi + (( 0 + %1) % 16)*4]
shr r12d, 15
shl eax, 16
shl ebx, 1
shl ecx, 1
shl edx, 1
shld r12d, eax, 16 ; BRC_X0
shld r13d, ebx, 16 ; BRC_X1
shld r14d, ecx, 16 ; BRC_X2
shld r15d, edx, 16 ; BRC_X3
%endmacro
%macro lookup_single_sbox 3
%define %%table %1 ; [in] Pointer to table to look up
%define %%idx %2 ; [in] Index to look up
%define %%value %3 ; [out] Returned value from lookup function (rcx, rdx, r8, r9)
%ifdef SAFE_LOOKUP
;; Save all registers used in lookup_8bit (xmm0-5, r9,r10)
;; and registers for param passing and return (4 regs, OS dependent)
;; (6*16 + 6*8 = 144 bytes)
sub rsp, 144
movdqu [rsp], xmm0
movdqu [rsp + 16], xmm1
movdqu [rsp + 32], xmm2
movdqu [rsp + 48], xmm3
movdqu [rsp + 64], xmm4
movdqu [rsp + 80], xmm5
mov [rsp + 96], r9
mov [rsp + 104], r10
%ifdef LINUX
mov [rsp + 112], rdi
mov [rsp + 120], rsi
mov [rsp + 128], rdx
mov rdi, %%table
mov rsi, %%idx
mov rdx, 256
%else
mov [rsp + 112], rcx
mov [rsp + 120], rdx
mov [rsp + 128], r8
mov rcx, %%table
mov rdx, %%idx
mov r8, 256
%endif
mov [rsp + 136], rax
call lookup_8bit_sse
;; Restore all registers
movdqu xmm0, [rsp]
movdqu xmm1, [rsp + 16]
movdqu xmm2, [rsp + 32]
movdqu xmm3, [rsp + 48]
movdqu xmm4, [rsp + 64]
movdqu xmm5, [rsp + 80]
mov r9, [rsp + 96]
mov r10, [rsp + 104]
%ifdef LINUX
mov rdi, [rsp + 112]
mov rsi, [rsp + 120]
mov rdx, [rsp + 128]
%else
mov rcx, [rsp + 112]
mov rdx, [rsp + 120]
mov r8, [rsp + 128]
%endif
;; Move returned value from lookup function, before restoring rax
mov DWORD(%%value), eax
mov rax, [rsp + 136]
add rsp, 144
%else ;; SAFE_LOOKUP
movzx DWORD(%%value), BYTE [%%table + %%idx]
%endif ;; SAFE_LOOKUP
%endmacro
;
; NONLIN_FUN()
;
; params
; %1 == 1, then calculate W
; uses
; rdi rsi eax rdx edx
; r8d r9d ebx
; return
; eax = W value
; r10d = F_R1
; r11d = F_R2
;
%macro NONLIN_FUN 1
%if (%1 == 1)
mov eax, r12d
xor eax, r10d
add eax, r11d ; W = (BRC_X0 ^ F_R1) + F_R2
%endif
lea rdi, [rel S0]
lea rsi, [rel S1]
add r10d, r13d ; W1= F_R1 + BRC_X1
xor r11d, r14d ; W2= F_R2 ^ BRC_X2
mov rdx, r10
shld edx, r11d, 16 ; P = (W1 << 16) | (W2 >> 16)
shld r11d, r10d, 16 ; Q = (W2 << 16) | (W1 >> 16)
mov ebx, edx
mov ecx, edx
mov r8d, edx
mov r9d, edx
rol ebx, 2
rol ecx, 10
rol r8d, 18
rol r9d, 24
xor edx, ebx
xor edx, ecx
xor edx, r8d
xor edx, r9d ; U = L1(P) = EDX, hi(RDX)=0
;
xor r10, r10
shld ebx, edx, 24
shld r8d, edx, 16
shld r9d, edx, 8
and rdx, 0xFF
lookup_single_sbox rsi, rdx, rdx
and rbx, 0xFF
lookup_single_sbox rdi, rbx, rbx
and r8, 0xFF
lookup_single_sbox rsi, r8, r8
and r9, 0xFF
lookup_single_sbox rdi, r9, r9
shrd r10d, edx, 8
shrd r10d, ebx, 8
shrd r10d, r8d, 8
shrd r10d, r9d, 8
;
mov ebx, r11d
mov ecx, r11d
mov r8d, r11d
mov r9d, r11d
rol ebx, 8
rol ecx, 14
rol r8d, 22
rol r9d, 30
xor r11d, ebx
xor r11d, ecx
xor r11d, r8d
xor r11d, r9d ; V = L2(Q) = ECX, hi(RCX)=0
;
shld ebx, r11d, 24
shld r8d, r11d, 16
shld r9d, r11d, 8
and r11, 0xFF
lookup_single_sbox rsi, r11, r11
and rbx, 0xFF
lookup_single_sbox rdi, rbx, rbx
and r8, 0xFF
lookup_single_sbox rsi, r8, r8
and r9, 0xFF
lookup_single_sbox rdi, r9, r9
shrd r11d, r11d, 8
shrd r11d, ebx, 8
shrd r11d, r8d, 8
shrd r11d, r9d, 8
%endmacro
;
; LFSR_UPDT()
;
; params
; %1 - round number
; uses
; rax as input (ZERO or W)
; return
;
%macro LFSR_UPDT 1
;
; ebx = LFSR_S0
; ecx = LFSR_S4
; edx = LFSR_S10
; r8d = LFSR_S13
; r9d = LFSR_S15
;lea rsi, [LFSR_STA] ; moved to calling function
mov ebx, [rsi + (( 0 + %1) % 16)*4]
mov ecx, [rsi + (( 4 + %1) % 16)*4]
mov edx, [rsi + ((10 + %1) % 16)*4]
mov r8d, [rsi + ((13 + %1) % 16)*4]
mov r9d, [rsi + ((15 + %1) % 16)*4]
; Calculate 64-bit LFSR feedback
add rax, rbx
shl rbx, 8
shl rcx, 20
shl rdx, 21
shl r8, 17
shl r9, 15
add rax, rbx
add rax, rcx
add rax, rdx
add rax, r8
add rax, r9
; Reduce it to 31-bit value
mov rbx, rax
and rax, 0x7FFFFFFF
shr rbx, 31
add rax, rbx
mov rbx, rax
sub rbx, 0x7FFFFFFF
cmovns rax, rbx
; LFSR_S16 = (LFSR_S15++) = eax
mov [rsi + (( 0 + %1) % 16)*4], eax
%endmacro
;
; make_u31()
;
%macro make_u31 4
%define %%Rt %1
%define %%Ke %2
%define %%Ek %3
%define %%Iv %4
xor %%Rt, %%Rt
shrd %%Rt, %%Iv, 8
shrd %%Rt, %%Ek, 15
shrd %%Rt, %%Ke, 9
%endmacro
;
; key_expand()
;
%macro key_expand 1
movzx r8d, byte [pKe + (%1 + 0)]
movzx r9d, word [rbx + ((%1 + 0)*2)]
movzx r10d, byte [pIv + (%1 + 0)]
make_u31 r11d, r8d, r9d, r10d
mov [rax + ((%1 + 0)*4)], r11d
movzx r12d, byte [pKe + (%1 + 1)]
movzx r13d, word [rbx + ((%1 + 1)*2)]
movzx r14d, byte [pIv + (%1 + 1)]
make_u31 r15d, r12d, r13d, r14d
mov [rax + ((%1 + 1)*4)], r15d
%endmacro
;----------------------------------------------------------------------------------------
;;
;;extern void Zuc_Initialization(uint8_t* pKey, uint8_t* pIV, uint32_t * pState)
;;
;; WIN64
;; RCX - pKey
;; RDX - pIV
;; R8 - pState
;; LIN64
;; RDI - pKey
;; RSI - pIV
;; RDX - pState
;;
align 16
MKGLOBAL(asm_ZucInitialization,function,internal)
asm_ZucInitialization:
%ifdef LINUX
%define pKe rdi
%define pIv rsi
%define pState rdx
%else
%define pKe rcx
%define pIv rdx
%define pState r8
%endif
; save the base pointer
push rbp
;load stack pointer to rbp and reserve memory in the red zone
mov rbp, rsp
sub rsp, 196
; Save non-volatile registers
mov [rbp - 8], rbx
mov [rbp - 32], r12
mov [rbp - 40], r13
mov [rbp - 48], r14
mov [rbp - 56], r15
%ifndef LINUX
mov [rbp - 64], rdi
mov [rbp - 72], rsi
%endif
lea rbx, [rel EK_d] ; load pointer to D
lea rax, [pState] ; load pointer to pState
mov [rbp - 88], pState ; save pointer to pState
; Expand key
key_expand 0
key_expand 2
key_expand 4
key_expand 6
key_expand 8
key_expand 10
key_expand 12
key_expand 14
; Set R1 and R2 to zero
xor r10, r10
xor r11, r11
; Shift LFSR 32-times, update state variables
%assign N 0
%rep 32
mov rdx, [rbp - 88] ; load pointer to pState
lea rsi, [rdx]
BITS_REORG N
NONLIN_FUN 1
shr eax, 1
mov rdx, [rbp - 88] ; re-load pointer to pState
lea rsi, [rdx]
LFSR_UPDT N
%assign N N+1
%endrep
; And once more, initial round from keygen phase = 33 times
mov rdx, [rbp - 88] ; load pointer to pState
lea rsi, [rdx]
BITS_REORG 0
NONLIN_FUN 0
xor rax, rax
mov rdx, [rbp - 88] ; load pointer to pState
lea rsi, [rdx]
LFSR_UPDT 0
mov rdx, [rbp - 88] ; load pointer to pState
lea rsi, [rdx]
; Save ZUC's state variables
mov [rsi + (16*4)],r10d ;F_R1
mov [rsi + (17*4)],r11d ;F_R2
mov [rsi + (18*4)],r12d ;BRC_X0
mov [rsi + (19*4)],r13d ;BRC_X1
mov [rsi + (20*4)],r14d ;BRC_X2
mov [rsi + (21*4)],r15d ;BRC_X3
; Restore non-volatile registers
mov rbx, [rbp - 8]
mov r12, [rbp - 32]
mov r13, [rbp - 40]
mov r14, [rbp - 48]
mov r15, [rbp - 56]
%ifndef LINUX
mov rdi, [rbp - 64]
mov rsi, [rbp - 72]
%endif
; restore base pointer
mov rsp, rbp
pop rbp
ret
;;
;; void asm_ZucGenKeystream8B(void *pKeystream, ZucState_t *pState);
;;
;; WIN64
;; RCX - KS (key stream pointer)
;; RDX - STATE (state pointer)
;; LIN64
;; RDI - KS (key stream pointer)
;; RSI - STATE (state pointer)
;;
align 16
MKGLOBAL(asm_ZucGenKeystream8B,function,internal)
asm_ZucGenKeystream8B:
%ifdef LINUX
%define pKS rdi
%define pState rsi
%else
%define pKS rcx
%define pState rdx
%endif
; save the base pointer
push rbp
;load stack pointer to rbp and reserve memory in the red zone
mov rbp, rsp
sub rsp, 196
; Save non-volatile registers
mov [rbp - 8], rbx
mov [rbp - 32], r12
mov [rbp - 40], r13
mov [rbp - 48], r14
mov [rbp - 56], r15
%ifndef LINUX
mov [rbp - 64], rdi
mov [rbp - 72], rsi
%endif
; Load input keystream pointer parameter in RAX
mov rax, pKS
; Restore ZUC's state variables
xor r10, r10
xor r11, r11
mov r10d, [pState + OFFSET_FR1]
mov r11d, [pState + OFFSET_FR2]
mov r12d, [pState + OFFSET_BRC_X0]
mov r13d, [pState + OFFSET_BRC_X1]
mov r14d, [pState + OFFSET_BRC_X2]
mov r15d, [pState + OFFSET_BRC_X3]
; Store keystream pointer
mov [rbp - 80], rax
; Store ZUC State Pointer
mov [rbp - 88], pState
; Generate 8B of keystream in 2 rounds
%assign N 1
%rep 2
mov rdx, [rbp - 88] ; load *pState
lea rsi, [rdx]
BITS_REORG N
NONLIN_FUN 1
;Store the keystream
mov rbx, [rbp - 80] ; load *pkeystream
xor eax, r15d
mov [rbx], eax
add rbx, 4 ; increment the pointer
mov [rbp - 80], rbx ; save pkeystream
xor rax, rax
mov rdx, [rbp - 88] ; load *pState
lea rsi, [rdx]
LFSR_UPDT N
%assign N N+1
%endrep
mov rsi, [rbp - 88] ; load pState
; Save ZUC's state variables
mov [rsi + OFFSET_FR1], r10d
mov [rsi + OFFSET_FR2], r11d
mov [rsi + OFFSET_BRC_X0], r12d
mov [rsi + OFFSET_BRC_X1], r13d
mov [rsi + OFFSET_BRC_X2], r14d
mov [rsi + OFFSET_BRC_X3], r15d
; Restore non-volatile registers
mov rbx, [rbp - 8]
mov r12, [rbp - 32]
mov r13, [rbp - 40]
mov r14, [rbp - 48]
mov r15, [rbp - 56]
%ifndef LINUX
mov rdi, [rbp - 64]
mov rsi, [rbp - 72]
%endif
mov rsp, rbp
pop rbp
ret
;;
;; void asm_ZucGenKeystream64B(uint32_t * pKeystream, uint32_t * pState);
;;
;; WIN64
;; RCX - KS (key stream pointer)
;; RDX - STATE (state pointer)
;; LIN64
;; RDI - KS (key stream pointer)
;; RSI - STATE (state pointer)
;;
align 16
MKGLOBAL(asm_ZucGenKeystream64B,function,internal)
asm_ZucGenKeystream64B:
%ifdef LINUX
%define pKS rdi
%define pState rsi
%else
%define pKS rcx
%define pState rdx
%endif
; save the base pointer
push rbp
;load stack pointer to rbp and reserve memory in the red zone
mov rbp, rsp
sub rsp, 196
; Save non-volatile registers
mov [rbp - 8], rbx
mov [rbp - 32], r12
mov [rbp - 40], r13
mov [rbp - 48], r14
mov [rbp - 56], r15
%ifndef LINUX
mov [rbp - 64], rdi
mov [rbp - 72], rsi
%endif
; Load input keystream pointer parameter in RAX
mov rax, pKS
; Restore ZUC's state variables
xor r10, r10
xor r11, r11
mov r10d, [pState + OFFSET_FR1]
mov r11d, [pState + OFFSET_FR2]
mov r12d, [pState + OFFSET_BRC_X0]
mov r13d, [pState + OFFSET_BRC_X1]
mov r14d, [pState + OFFSET_BRC_X2]
mov r15d, [pState + OFFSET_BRC_X3]
; Store keystream pointer
mov [rbp - 80], rax
; Store ZUC State Pointer
mov [rbp - 88], pState
; Generate 64B of keystream in 16 rounds
%assign N 1
%rep 16
mov rdx, [rbp - 88] ; load *pState
lea rsi, [rdx]
BITS_REORG N
NONLIN_FUN 1
;Store the keystream
mov rbx, [rbp - 80] ; load *pkeystream
xor eax, r15d
mov [rbx], eax
add rbx, 4 ; increment the pointer
mov [rbp - 80], rbx ; save pkeystream
xor rax, rax
mov rdx, [rbp - 88] ; load *pState
lea rsi, [rdx]
LFSR_UPDT N
%assign N N+1
%endrep
mov rsi, [rbp - 88] ; load pState
; Save ZUC's state variables
mov [rsi + OFFSET_FR1], r10d
mov [rsi + OFFSET_FR2], r11d
mov [rsi + OFFSET_BRC_X0], r12d
mov [rsi + OFFSET_BRC_X1], r13d
mov [rsi + OFFSET_BRC_X2], r14d
mov [rsi + OFFSET_BRC_X3], r15d
; Restore non-volatile registers
mov rbx, [rbp - 8]
mov r12, [rbp - 32]
mov r13, [rbp - 40]
mov r14, [rbp - 48]
mov r15, [rbp - 56]
%ifndef LINUX
mov rdi, [rbp - 64]
mov rsi, [rbp - 72]
%endif
mov rsp, rbp
pop rbp
ret
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