// File: /workspace/github_c_makefile_star2_O3/mjosaarinen[P]brutus/crypto_aead/aes256otrsv2/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], LdL[BLOCK], Llast[BLOCK], Z[BLOCK];
	uint8 Sum[BLOCK]={0};

	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(L,delta,LdL);
		xor(LdL,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);
		mul2(L,L); // L <- 2L
	}
	/* 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);
		memcpy(Llast,L,BLOCK); //Llast = L
	}
	else{//even blocks, last > BLOCK always holds. 2-round Feistel with last swap
		xor(L,delta,Llast); //Llast = L xor delta
		ozp(last-BLOCK,ciphertext+(j+BLOCK),tmp);
		xor(Sum,tmp,Sum);
		xor(Llast,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);
	}
	/* TE generation */
	mul2(Llast,tmp);
	xor(Llast,tmp,Llast); //Llast = 3Llast
	xor(Sum,Llast,Sum);	//Sum = 3Llast xor Sum
	if(last == BLOCK || last == DBLOCK){//last = 16 or 32
		xor(Sum,delta,Sum);
	}
	Encryption(KeyLen,Sum,TE);
	return SUCCESS;
}

// Assembly:
pushq %rbp
pushq %r15
pushq %r14
pushq %r13
pushq %r12
pushq %rbx
subq $0x88, %rsp
vpxor %xmm0, %xmm0, %xmm0
vmovdqa %xmm0, 0x20(%rsp)
testl %ecx, %ecx
je 0x1a41
movq %r9, %rbp
movl %ecx, %r15d
movq %rdx, 0x38(%rsp)
movl %ecx, %ebx
andl $0x1f, %ebx
movl $0x20, %r13d
cmovnel %ebx, %r13d
subl %r13d, %r15d
movl %r8d, %edx
callq 0x10f0
xorl %r14d, %r14d
cmpl $0x20, %r15d
jb 0x19d8
movq %rbx, 0x78(%rsp)
movq %r13, 0x80(%rsp)
shrl $0x5, %r15d
movl %r15d, 0x5c(%rsp)
movq 0x38(%rsp), %rcx
leaq 0x10(%rcx), %r12
xorl %r14d, %r14d
movq 0x370a(%rip), %rdx      # 0x4f98
movw $0x7fff, %ax            # imm = 0x7FFF
kmovd %eax, %k1
kmovw %k1, 0x1e(%rsp)
movq %rbp, %rbx
movq %rcx, %rbp
movq %rbx, 0x50(%rsp)
xorl %r15d, %r15d
movq 0x3717(%rip), %rax      # 0x4fc8
vmovdqa (%rax), %xmm0
movq 0x38(%rsp), %rax
vmovdqu (%rax,%r14), %xmm1
vpternlogq $0x96, (%rdx), %xmm0, %xmm1
vmovdqa %xmm1, (%rsp)
movl $0x100, %edi            # imm = 0x100
movq %rsp, %rdx
movq %rdx, %rsi
callq 0x1100
movq %r14, %r13
orq $0x10, %r13
xorl %eax, %eax
movb (%r12,%rax), %cl
xorb (%rsp,%rax), %cl
movb %cl, (%rbx,%rax)
incq %rax
cmpq $0x10, %rax
jne 0x18e5
movq 0x50(%rsp), %rax
vmovdqu (%rax,%r14), %xmm0
movq 0x368e(%rip), %rax      # 0x4f98
vpxor (%rax), %xmm0, %xmm0
vmovdqa %xmm0, (%rsp)
movl $0x100, %edi            # imm = 0x100
movq %rsp, %rdx
movq %rdx, %rsi
callq 0x1100
xorl %eax, %eax
movb (%rbp,%rax), %cl
xorb (%rsp,%rax), %cl
movb %cl, 0x10(%rbx,%rax)
incq %rax
cmpq $0x10, %rax
jne 0x1925
movq 0x50(%rsp), %rax
vmovups (%rax,%r13), %xmm0
vxorps 0x20(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x20(%rsp)
movq 0x3641(%rip), %rdx      # 0x4f98
movzbl (%rdx), %eax
vmovd %eax, %xmm0
vpbroadcastb %xmm0, %xmm0
kmovw 0x1e(%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, 0x1673(%rip){1to4}, %xmm1, %xmm0 # 0x3000
vmovdqu8 %xmm0, (%rdx) {%k1}
shrl $0x7, %eax
movb 0xf(%rdx), %cl
addb %cl, %cl
leaq 0x167e(%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 0x5c(%rsp), %r15d
jne 0x18aa
movq 0x80(%rsp), %r13
movq 0x50(%rsp), %rbp
movq 0x78(%rsp), %rbx
cmpl $0x11, %r13d
jae 0x1a9c
movq 0x35af(%rip), %rsi      # 0x4f98
leaq 0x60(%rsp), %rdx
movl $0x100, %edi            # imm = 0x100
callq 0x1100
movl %r14d, %eax
movq 0x38(%rsp), %rdx
addq %rax, %rdx
addq %rax, %rbp
movl %ebx, %r15d
xorl %eax, %eax
movb (%rdx,%rax), %cl
xorb 0x60(%rsp,%rax), %cl
movb %cl, (%rbp,%rax)
incq %rax
cmpq %rax, %r15
jne 0x1a0b
vpxor %xmm0, %xmm0, %xmm0
movq %rsp, %rdi
vmovdqa %xmm0, (%rdi)
movq %rbp, %rsi
movq %r15, %rdx
callq 0x1110
movl $0x10, %r13d
cmpl $0x10, %ebx
jne 0x1a6d
jmp 0x1a75
movl %r8d, %edx
callq 0x10f0
movq 0x3548(%rip), %rsi      # 0x4f98
leaq 0x60(%rsp), %rdx
movl $0x100, %edi            # imm = 0x100
callq 0x1100
vpxor %xmm0, %xmm0, %xmm0
vmovdqa %xmm0, (%rsp)
xorl %ebx, %ebx
xorl %r15d, %r15d
movb $-0x80, (%rsp,%r15)
movl %ebx, %r13d
vmovaps 0x20(%rsp), %xmm0
vxorps (%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x20(%rsp)
movq 0x350b(%rip), %rax      # 0x4f98
vmovaps (%rax), %xmm0
vmovaps %xmm0, 0x40(%rsp)
jmp 0x1b90
movq 0x3525(%rip), %rax      # 0x4fc8
vmovaps (%rax), %xmm0
movq 0x34ea(%rip), %r12      # 0x4f98
vxorps (%r12), %xmm0, %xmm0
vmovaps %xmm0, 0x40(%rsp)
leal -0x10(%r13), %r15d
movl %r14d, %ebx
movq 0x38(%rsp), %r14
leaq 0x10(%r14,%rbx), %rsi
vxorps %xmm0, %xmm0, %xmm0
movq %rsp, %rdi
vmovaps %xmm0, (%rdi)
movq %r15, %rdx
callq 0x1110
cmpl $0x10, %r15d
jae 0x1ae9
movb $-0x80, (%rsp,%r15)
movq %rsp, %rdx
vmovdqa (%rdx), %xmm0
vpxor 0x20(%rsp), %xmm0, %xmm1
vmovdqa %xmm1, 0x20(%rsp)
vpxor 0x40(%rsp), %xmm0, %xmm0
vmovdqa %xmm0, (%rdx)
movl $0x100, %edi            # imm = 0x100
movq %rdx, %rsi
callq 0x1100
leaq (%r14,%rbx), %rcx
leaq (%rbx,%rbp), %rax
xorl %edx, %edx
movb (%rcx,%rdx), %sil
xorb (%rsp,%rdx), %sil
movb %sil, (%rax,%rdx)
incq %rdx
cmpq $0x10, %rdx
jne 0x1b1d
vmovups (%rax), %xmm0
vxorps (%r12), %xmm0, %xmm0
movq %rsp, %rsi
vmovaps %xmm0, (%rsi)
leaq 0x60(%rsp), %rdx
movl $0x100, %edi            # imm = 0x100
callq 0x1100
testq %r15, %r15
je 0x1b7e
leaq (%rbx,%rbp), %rax
addq $0x10, %rax
leaq (%r14,%rbx), %rcx
addq $0x10, %rcx
xorl %edx, %edx
movb (%rcx,%rdx), %sil
xorb 0x60(%rsp,%rdx), %sil
movb %sil, (%rax,%rdx)
incq %rdx
cmpq %rdx, %r15
jne 0x1b69
vmovaps 0x60(%rsp), %xmm0
vxorps 0x20(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x20(%rsp)
movzbl 0x40(%rsp), %eax
vmovd %eax, %xmm0
vpbroadcastb %xmm0, %xmm0
movw $0x7fff, %cx            # imm = 0x7FFF
kmovd %ecx, %k1
vmovdqu8 0x41(%rsp), %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, 0x1435(%rip){1to4}, %xmm1, %xmm0 # 0x3000
vmovdqu8 %xmm0, (%rsp) {%k1}
shrl $0x7, %eax
movb 0x4f(%rsp), %cl
addb %cl, %cl
leaq 0x143e(%rip), %rdx      # 0x3020
xorb (%rax,%rdx), %cl
movb %cl, 0xf(%rsp)
vmovaps (%rsp), %xmm0
vxorps 0x40(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x40(%rsp)
vxorps 0x20(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x20(%rsp)
cmpl $0x20, %r13d
je 0x1c12
cmpl $0x10, %r13d
jne 0x1c29
movq 0x33af(%rip), %rax      # 0x4fc8
vmovaps (%rax), %xmm0
vxorps 0x20(%rsp), %xmm0, %xmm0
vmovaps %xmm0, 0x20(%rsp)
movq 0x33b0(%rip), %rdx      # 0x4fe0
leaq 0x20(%rsp), %rsi
movl $0x100, %edi            # imm = 0x100
callq 0x1100
xorl %eax, %eax
addq $0x88, %rsp
popq %rbx
popq %r12
popq %r13
popq %r14
popq %r15
popq %rbp
retq