// File: /workspace/github_c_makefile_star2_O3/mjosaarinen[P]brutus/crypto_aead/aes256otrsv3/ref/OTR.c
// Function: DFunc
int DFunc(
		  const uint8 *nonce,
		  uint32 nonce_len,
		  const uint8 *ciphertext,
		  uint32 ci_len,
		  uint32 t_len,
		  uint8 *plaintext)
{
	uint32 i,j = 0;
	uint32 ell=0; /*number of 2BLOCK-byte chunks, excl. last one*/
	uint32 last=0; /*number of bytes in the last chunks*/

	uint8 tmp[BLOCK], Z[BLOCK];
	uint8 Sum[BLOCK]={0};
	uint8 *La;

	if(ci_len != 0){
		last = ci_len % DBLOCK;
		if(last == 0) last = DBLOCK;
		ell = (ci_len-last) / DBLOCK; /*plaintext length = 2BLOCK*ell + last (non-zero)*/
	}

	nEnc(nonce, nonce_len, t_len);

	/* 2-round Feistel for the full chunks */
	for(i = 0; i < ell; i++, j=j+DBLOCK){
		xor(Ls,ciphertext+j,tmp);
		Encryption(KeyLen, tmp, tmp);
		xor(tmp,ciphertext+(j+BLOCK),plaintext+j);
		xor(L,plaintext+j,tmp);
		Encryption(KeyLen, tmp, tmp);
		xor(tmp,ciphertext+j,plaintext+(j+BLOCK));
		xor(Sum,plaintext+(j+BLOCK),Sum);
		xor(L,Ls,L); 
		mul2(Ls,Ls); 
	}
	/* Last chunk */
	if(last <= BLOCK){ 	/*odd block, including the case pl_len = 0 (no plaintext)*/
		Encryption(KeyLen, L, Z);
		xorp(last, Z,ciphertext+j,plaintext+j);
		ozp(last,plaintext+j,tmp);
		xor(tmp,Sum,Sum);
		La = L;
	}
	else{/*even blocks, last > BLOCK always holds. 2-round Feistel with last swap*/
		ozp(last-BLOCK,ciphertext+(j+BLOCK),tmp); //tmp = ozp(C[m])
		xor(Sum,tmp,Sum);
		xor(Ls,tmp,tmp);
		Encryption(KeyLen,tmp,tmp);
		xor(tmp,ciphertext+j,plaintext+j);
		xor(L,plaintext+j,tmp);
		Encryption(KeyLen,tmp,Z);
		xorp(last-BLOCK,Z,ciphertext+(j+BLOCK),plaintext+(j+BLOCK));
		xor(Sum,Z,Sum);
		La = Ls;
	}
	/* TE generation */
	if(last == BLOCK || last == DBLOCK){/*[last = 16 or 32] = integral block*/
		mul7(La,La);
	}
	else {/*partial block*/
		mul3twice(La,La);
	}
	xor(Sum,La,Sum);	/*Sum = (3^2 or 7)La xor Sum*/
	Encryption(KeyLen,Sum,TE);
	return SUCCESS;
}

// Assembly:
pushq %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
subq $0x98, %rsp
vpxor %xmm0, %xmm0, %xmm0
vmovdqa %xmm0, 0x30(%rsp)
testl %ecx, %ecx
je 0x1a5c
movq %r9, %r13
movl %ecx, %r15d
movq %rdx, 0x28(%rsp)
movl %ecx, %ebx
andl $0x1f, %ebx
movl $0x20, %ebp
cmovnel %ebx, %ebp
subl %ebp, %r15d
movl %r8d, %edx
callq 0x10f0
xorl %r14d, %r14d
cmpl $0x20, %r15d
jb 0x19f2
movq %rbx, 0x70(%rsp)
movq %rbp, 0x78(%rsp)
shrl $0x5, %r15d
movl %r15d, 0x4c(%rsp)
movq 0x28(%rsp), %rbp
leaq 0x10(%rbp), %r12
xorl %r14d, %r14d
movq 0x3755(%rip), %rdx      # 0x4ff8
movw $0x7fff, %ax            # imm = 0x7FFF
kmovd %eax, %k1
kmovw %k1, 0xe(%rsp)
movq %r13, %rbx
xorl %r15d, %r15d
movq %r13, 0x68(%rsp)
movq 0x28(%rsp), %rax
vmovdqu (%rax,%r14), %xmm0
vpxor (%rdx), %xmm0, %xmm0
vmovdqa %xmm0, 0x10(%rsp)
movl $0x100, %edi            # imm = 0x100
leaq 0x10(%rsp), %rdx
movq %rdx, %rsi
callq 0x1100
movq %r14, %r13
orq $0x10, %r13
xorl %eax, %eax
movb (%r12,%rax), %cl
xorb 0x10(%rsp,%rax), %cl
movb %cl, (%rbx,%rax)
incq %rax
cmpq $0x10, %rax
jne 0x18ec
movq 0x68(%rsp), %rax
vmovdqu (%rax,%r14), %xmm0
movq 0x368e(%rip), %rax      # 0x4fa0
vpxor (%rax), %xmm0, %xmm0
vmovdqa %xmm0, 0x10(%rsp)
movl $0x100, %edi            # imm = 0x100
leaq 0x10(%rsp), %rdx
movq %rdx, %rsi
callq 0x1100
xorl %eax, %eax
movb (%rbp,%rax), %cl
xorb 0x10(%rsp,%rax), %cl
movb %cl, 0x10(%rbx,%rax)
incq %rax
cmpq $0x10, %rax
jne 0x1930
movq 0x68(%rsp), %rax
vmovups (%rax,%r13), %xmm0
movq %rax, %r13
vxorps 0x30(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x30(%rsp)
movq 0x3692(%rip), %rdx      # 0x4ff8
vmovaps (%rdx), %xmm0
movq 0x362f(%rip), %rax      # 0x4fa0
vxorps (%rax), %xmm0, %xmm0
vmovaps %xmm0, (%rax)
movzbl (%rdx), %eax
vmovd %eax, %xmm0
vpbroadcastb %xmm0, %xmm0
kmovw 0xe(%rsp), %k1
vmovdqu8 0x1(%rdx), %xmm1 {%k1} {z}
vpalignr $0xf, %xmm0, %xmm1, %xmm0 # xmm0 = xmm0[15],xmm1[0,1,2,3,4,5,6,7,8,9,10,11,12,13,14]
vpsrlw $0x7, %xmm1, %xmm1
vpaddw %xmm0, %xmm0, %xmm0
vpternlogd $0xe4, 0x1651(%rip){1to4}, %xmm1, %xmm0 # 0x3000
vmovdqu8 %xmm0, (%rdx) {%k1}
shrl $0x7, %eax
movb 0xf(%rdx), %cl
addb %cl, %cl
leaq 0x165c(%rip), %rsi      # 0x3020
xorb (%rax,%rsi), %cl
movb %cl, 0xf(%rdx)
incl %r15d
addq $0x20, %r14
addq $0x20, %rbx
addq $0x20, %r12
addq $0x20, %rbp
cmpl 0x4c(%rsp), %r15d
jne 0x18bc
movq 0x78(%rsp), %rbp
movq 0x70(%rsp), %rbx
cmpl $0x11, %ebp
jae 0x1aa9
movq 0x359e(%rip), %rsi      # 0x4fa0
leaq 0x50(%rsp), %rdx
movl $0x100, %edi            # imm = 0x100
callq 0x1100
movl %r14d, %eax
movq 0x28(%rsp), %rdx
addq %rax, %rdx
addq %rax, %r13
movl %ebx, %r15d
xorl %eax, %eax
movb (%rdx,%rax), %cl
xorb 0x50(%rsp,%rax), %cl
movb %cl, (%r13,%rax)
incq %rax
cmpq %rax, %r15
jne 0x1a24
vpxor %xmm0, %xmm0, %xmm0
leaq 0x10(%rsp), %rdi
vmovdqa %xmm0, (%rdi)
movq %r13, %rsi
movq %r15, %rdx
callq 0x1110
movl $0x10, %ebp
cmpl $0x10, %ebx
jne 0x1a89
jmp 0x1a91
movl %r8d, %edx
callq 0x10f0
movq 0x3535(%rip), %rsi      # 0x4fa0
leaq 0x50(%rsp), %rdx
movl $0x100, %edi            # imm = 0x100
callq 0x1100
vpxor %xmm0, %xmm0, %xmm0
vmovdqa %xmm0, 0x10(%rsp)
xorl %ebx, %ebx
xorl %r15d, %r15d
movb $-0x80, 0x10(%rsp,%r15)
movl %ebx, %ebp
vmovaps 0x30(%rsp), %xmm0
vxorps 0x10(%rsp), %xmm0, %xmm0
movq 0x34fc(%rip), %r15      # 0x4fa0
jmp 0x1b8f
leal -0x10(%rbp), %r12d
movl %r14d, %ebx
movq 0x28(%rsp), %r14
leaq (%r14,%rbx), %rsi
addq $0x10, %rsi
vpxor %xmm0, %xmm0, %xmm0
leaq 0x10(%rsp), %rdi
vmovdqa %xmm0, (%rdi)
movq %r12, %rdx
callq 0x1110
cmpl $0xf, %r12d
ja 0x1ade
movb $-0x80, 0x10(%rsp,%r12)
leaq 0x10(%rsp), %rdx
vmovdqa (%rdx), %xmm0
vpxor 0x30(%rsp), %xmm0, %xmm1
vmovdqa %xmm1, 0x30(%rsp)
movq 0x34fe(%rip), %r15      # 0x4ff8
vpxor (%r15), %xmm0, %xmm0
vmovdqa %xmm0, (%rdx)
movl $0x100, %edi            # imm = 0x100
movq %rdx, %rsi
callq 0x1100
leaq (%r14,%rbx), %rcx
leaq (%rbx,%r13), %rax
xorl %edx, %edx
movb (%rcx,%rdx), %sil
xorb 0x10(%rsp,%rdx), %sil
movb %sil, (%rax,%rdx)
incq %rdx
cmpq $0x10, %rdx
jne 0x1b1a
vmovups (%rax), %xmm0
movq 0x3465(%rip), %rax      # 0x4fa0
vxorps (%rax), %xmm0, %xmm0
leaq 0x10(%rsp), %rsi
vmovaps %xmm0, (%rsi)
leaq 0x50(%rsp), %rdx
movl $0x100, %edi            # imm = 0x100
callq 0x1100
testq %r12, %r12
je 0x1b83
leaq (%rbx,%r13), %rax
addq $0x10, %rax
leaq (%r14,%rbx), %rcx
addq $0x10, %rcx
xorl %edx, %edx
movb (%rcx,%rdx), %sil
xorb 0x50(%rsp,%rdx), %sil
movb %sil, (%rax,%rdx)
incq %rdx
cmpq %rdx, %r12
jne 0x1b6e
vmovaps 0x50(%rsp), %xmm0
vxorps 0x30(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x30(%rsp)
cmpl $0x20, %ebp
je 0x1b9f
cmpl $0x10, %ebp
jne 0x1bac
movq %r15, %rdi
movq %r15, %rsi
callq 0x1757
jmp 0x1bcd
leaq 0x80(%rsp), %rbx
movq %r15, %rdi
movq %rbx, %rsi
callq 0x1f57
vmovaps (%rbx), %xmm0
vxorps (%r15), %xmm0, %xmm0
vmovaps %xmm0, (%r15)
vmovaps (%r15), %xmm0
leaq 0x30(%rsp), %rsi
vxorps (%rsi), %xmm0, %xmm0
vmovaps %xmm0, (%rsi)
movq 0x33fa(%rip), %rdx      # 0x4fe0
movl $0x100, %edi            # imm = 0x100
callq 0x1100
xorl %eax, %eax
addq $0x98, %rsp
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq