#define NULL ((void *)0)
typedef unsigned long size_t; // Customize by platform.
typedef long intptr_t;
typedef unsigned long uintptr_t;
typedef long scalar_t__; // Either arithmetic or pointer type.
/* By default, we understand bool (as a convenience). */
typedef int bool;
#define false 0
#define true 1

/* Forward declarations */

/* Type definitions */
typedef int /*<<< orphan*/ BN_CTX;
typedef int /*<<< orphan*/ BIGNUM;

/* Variables and functions */
int /*<<< orphan*/ BN_CTX_end(int /*<<< orphan*/ *);
int /*<<< orphan*/ *BN_CTX_get(int /*<<< orphan*/ *);
int /*<<< orphan*/ BN_CTX_start(int /*<<< orphan*/ *);
int BN_num_bits(int /*<<< orphan*/ *);
int /*<<< orphan*/ BN_rand(int /*<<< orphan*/ *, int, int, int /*<<< orphan*/);
int /*<<< orphan*/ BN_sub(int /*<<< orphan*/ *, int /*<<< orphan*/ *,
                          int /*<<< orphan*/ *);
int BN_X931_generate_Xpq(BIGNUM *Xp, BIGNUM *Xq, int nbits, BN_CTX *ctx) {
  BIGNUM *t;
  int i;
  if ((nbits < 1024) || (nbits & 0xff))
    return 0;
  nbits >>= 1;
  if (!BN_rand(Xp, nbits, 1, 0))
    goto err;
  BN_CTX_start(ctx);
  t = BN_CTX_get(ctx);
  if (t == NULL)
    goto err;
  for (i = 0; i < 1000; i++) {
    if (!BN_rand(Xq, nbits, 1, 0))
      goto err;
    BN_sub(t, Xp, Xq);
    if (BN_num_bits(t) > (nbits - 100))
      break;
  }
  BN_CTX_end(ctx);
  if (i < 1000)
    return 1;
  return 0;
err:
  BN_CTX_end(ctx);
  return 0;
}


x86 assembly (clang, -O0):
<BN_X931_generate_Xpq>:
push   %rbp
mov    %rsp,%rbp
sub    $0x40,%rsp
mov    %rdi,-0x10(%rbp)
mov    %rsi,-0x18(%rbp)
mov    %edx,-0x1c(%rbp)
mov    %rcx,-0x28(%rbp)
cmpl   $0x400,-0x1c(%rbp)
jl     1195 <BN_X931_generate_Xpq+0x35>
mov    -0x1c(%rbp),%eax
and    $0xff,%eax
cmp    $0x0,%eax
je     11a1 <BN_X931_generate_Xpq+0x41>
movl   $0x0,-0x4(%rbp)
jmp    12a4 <BN_X931_generate_Xpq+0x144>
mov    -0x1c(%rbp),%eax
sar    $0x1,%eax
mov    %eax,-0x1c(%rbp)
mov    -0x10(%rbp),%rdi
mov    -0x1c(%rbp),%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
cmp    $0x0,%eax
jne    11cb <BN_X931_generate_Xpq+0x6b>
jmp    1294 <BN_X931_generate_Xpq+0x134>
mov    -0x28(%rbp),%rdi
call   1080 <BN_CTX_start@plt>
mov    -0x28(%rbp),%rdi
call   1040 <BN_CTX_get@plt>
mov    %rax,-0x30(%rbp)
cmpq   $0x0,-0x30(%rbp)
jne    11f1 <BN_X931_generate_Xpq+0x91>
jmp    1294 <BN_X931_generate_Xpq+0x134>
movl   $0x0,-0x34(%rbp)
cmpl   $0x3e8,-0x34(%rbp)
jge    1266 <BN_X931_generate_Xpq+0x106>
mov    -0x18(%rbp),%rdi
mov    -0x1c(%rbp),%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
cmp    $0x0,%eax
jne    1226 <BN_X931_generate_Xpq+0xc6>
jmp    1294 <BN_X931_generate_Xpq+0x134>
mov    -0x30(%rbp),%rdi
mov    -0x10(%rbp),%rsi
mov    -0x18(%rbp),%rdx
call   1060 <BN_sub@plt>
mov    -0x30(%rbp),%rdi
call   1050 <BN_num_bits@plt>
mov    -0x1c(%rbp),%ecx
sub    $0x64,%ecx
cmp    %ecx,%eax
jle    1253 <BN_X931_generate_Xpq+0xf3>
jmp    1266 <BN_X931_generate_Xpq+0x106>
jmp    1258 <BN_X931_generate_Xpq+0xf8>
mov    -0x34(%rbp),%eax
add    $0x1,%eax
mov    %eax,-0x34(%rbp)
jmp    11f8 <BN_X931_generate_Xpq+0x98>
mov    -0x28(%rbp),%rdi
call   1070 <BN_CTX_end@plt>
cmpl   $0x3e8,-0x34(%rbp)
jge    1288 <BN_X931_generate_Xpq+0x128>
movl   $0x1,-0x4(%rbp)
jmp    12a4 <BN_X931_generate_Xpq+0x144>
movl   $0x0,-0x4(%rbp)
jmp    12a4 <BN_X931_generate_Xpq+0x144>
mov    -0x28(%rbp),%rdi
call   1070 <BN_CTX_end@plt>
movl   $0x0,-0x4(%rbp)
mov    -0x4(%rbp),%eax
add    $0x40,%rsp
pop    %rbp
ret

x86 assembly (clang, -O2):
<BN_X931_generate_Xpq>:
push   %rbp
push   %r15
push   %r14
push   %r13
push   %r12
push   %rbx
sub    $0x18,%rsp
mov    %rdi,0x10(%rsp)
xor    %eax,%eax
cmp    $0x400,%edx
jl     124b <BN_X931_generate_Xpq+0xeb>
mov    %edx,%ebx
movzbl %bl,%edx
test   %edx,%edx
jne    124b <BN_X931_generate_Xpq+0xeb>
mov    %rsi,%r13
mov    %rcx,0x8(%rsp)
shr    %ebx
mov    0x10(%rsp),%rdi
mov    %ebx,%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
test   %eax,%eax
je     123f <BN_X931_generate_Xpq+0xdf>
mov    0x8(%rsp),%rbp
mov    %rbp,%rdi
call   1080 <BN_CTX_start@plt>
mov    %rbp,%rdi
call   1040 <BN_CTX_get@plt>
test   %rax,%rax
je     123f <BN_X931_generate_Xpq+0xdf>
mov    %rax,%rbp
lea    -0x64(%rbx),%r14d
xor    %r12d,%r12d
mov    $0x1,%r15b
nopw   0x0(%rax,%rax,1)
mov    %r13,%rdi
mov    %ebx,%esi
mov    $0x1,%edx
xor    %ecx,%ecx
call   1030 <BN_rand@plt>
test   %eax,%eax
je     123f <BN_X931_generate_Xpq+0xdf>
mov    %rbp,%rdi
mov    0x10(%rsp),%rsi
mov    %r13,%rdx
call   1060 <BN_sub@plt>
mov    %rbp,%rdi
call   1050 <BN_num_bits@plt>
cmp    %r14d,%eax
jg     122c <BN_X931_generate_Xpq+0xcc>
cmp    $0x3e7,%r12d
lea    0x1(%r12),%eax
setb   %r15b
mov    %eax,%r12d
cmp    $0x3e8,%eax
jne    11e0 <BN_X931_generate_Xpq+0x80>
mov    0x8(%rsp),%rdi
call   1070 <BN_CTX_end@plt>
movzbl %r15b,%eax
and    $0x1,%eax
jmp    124b <BN_X931_generate_Xpq+0xeb>
mov    0x8(%rsp),%rdi
call   1070 <BN_CTX_end@plt>
xor    %eax,%eax
add    $0x18,%rsp
pop    %rbx
pop    %r12
pop    %r13
pop    %r14
pop    %r15
pop    %rbp
ret

LLVM IR (-O0):
define i32 @BN_X931_generate_Xpq(i32* %0, i32* %1, i32 %2, i32* %3) {
%5 = alloca i32
%6 = alloca i32*
%7 = alloca i32*
%8 = alloca i32
%9 = alloca i32*
%10 = alloca i32*
%11 = alloca i32
store i32* %0, i32** %6
store i32* %1, i32** %7
store i32 %2, i32* %8
store i32* %3, i32** %9
%12 = load i32, i32* %8
%13 = icmp slt i32 %12, 1024
br i1 %13, label %18, label %14
14: ; preds = %4
%15 = load i32, i32* %8
%16 = and i32 %15, 255
%17 = icmp ne i32 %16, 0
br i1 %17, label %18, label %19
18: ; preds = %14, %4
store i32 0, i32* %5
br label %70
19: ; preds = %14
%20 = load i32, i32* %8
%21 = ashr i32 %20, 1
store i32 %21, i32* %8
%22 = load i32*, i32** %6
%23 = load i32, i32* %8
%24 = call i32 @BN_rand(i32* %22, i32 %23, i32 1, i32 0)
%25 = icmp ne i32 %24, 0
br i1 %25, label %27, label %26
26: ; preds = %19
br label %67
27: ; preds = %19
%28 = load i32*, i32** %9
%29 = call i32 @BN_CTX_start(i32* %28)
%30 = load i32*, i32** %9
%31 = call i32* @BN_CTX_get(i32* %30)
store i32* %31, i32** %10
%32 = load i32*, i32** %10
%33 = icmp eq i32* %32, null
br i1 %33, label %34, label %35
34: ; preds = %27
br label %67
35: ; preds = %27
store i32 0, i32* %11
br label %36
36: ; preds = %57, %35
%37 = load i32, i32* %11
%38 = icmp slt i32 %37, 1000
br i1 %38, label %39, label %60
39: ; preds = %36
%40 = load i32*, i32** %7
%41 = load i32, i32* %8
%42 = call i32 @BN_rand(i32* %40, i32 %41, i32 1, i32 0)
%43 = icmp ne i32 %42, 0
br i1 %43, label %45, label %44
44: ; preds = %39
br label %67
45: ; preds = %39
%46 = load i32*, i32** %10
%47 = load i32*, i32** %6
%48 = load i32*, i32** %7
%49 = call i32 @BN_sub(i32* %46, i32* %47, i32* %48)
%50 = load i32*, i32** %10
%51 = call i32 @BN_num_bits(i32* %50)
%52 = load i32, i32* %8
%53 = sub nsw i32 %52, 100
%54 = icmp sgt i32 %51, %53
br i1 %54, label %55, label %56
55: ; preds = %45
br label %60
56: ; preds = %45
br label %57
57: ; preds = %56
%58 = load i32, i32* %11
%59 = add nsw i32 %58, 1
store i32 %59, i32* %11
br label %36
60: ; preds = %55, %36
%61 = load i32*, i32** %9
%62 = call i32 @BN_CTX_end(i32* %61)
%63 = load i32, i32* %11
%64 = icmp slt i32 %63, 1000
br i1 %64, label %65, label %66
65: ; preds = %60
store i32 1, i32* %5
br label %70
66: ; preds = %60
store i32 0, i32* %5
br label %70
67: ; preds = %44, %34, %26
%68 = load i32*, i32** %9
%69 = call i32 @BN_CTX_end(i32* %68)
store i32 0, i32* %5
br label %70
70: ; preds = %67, %66, %65, %18
%71 = load i32, i32* %5
ret i32 %71
}

LLVM IR (-O2):
define i32 @BN_X931_generate_Xpq(i32* %0, i32* %1, i32 %2, i32* %3) {
%5 = icmp sgt i32 %2, 1023
%6 = and i32 %2, 255
%7 = icmp eq i32 %6, 0
%8 = and i1 %5, %7
br i1 %8, label %9, label %38
9: ; preds = %4
%10 = lshr i32 %2, 1
%11 = tail call i32 @BN_rand(i32* %0, i32 %10, i32 1, i32 0)
%12 = icmp eq i32 %11, 0
br i1 %12, label %36, label %13
13: ; preds = %9
%14 = tail call i32 @BN_CTX_start(i32* %3)
%15 = tail call i32* @BN_CTX_get(i32* %3)
%16 = icmp eq i32* %15, null
br i1 %16, label %36, label %17
17: ; preds = %13
%18 = add nsw i32 %10, -100
br label %23
19: ; preds = %28
%20 = add nuw nsw i32 %25, 1
%21 = icmp ult i32 %25, 999
%22 = icmp eq i32 %20, 1000
br i1 %22, label %32, label %23
23: ; preds = %17, %19
%24 = phi i1 [ true, %17 ], [ %21, %19 ]
%25 = phi i32 [ 0, %17 ], [ %20, %19 ]
%26 = tail call i32 @BN_rand(i32* %1, i32 %10, i32 1, i32 0)
%27 = icmp eq i32 %26, 0
br i1 %27, label %36, label %28
28: ; preds = %23
%29 = tail call i32 @BN_sub(i32* %15, i32* %0, i32* %1)
%30 = tail call i32 @BN_num_bits(i32* %15)
%31 = icmp sgt i32 %30, %18
br i1 %31, label %32, label %19
32: ; preds = %28, %19
%33 = phi i1 [ %24, %28 ], [ %21, %19 ]
%34 = tail call i32 @BN_CTX_end(i32* %3)
%35 = zext i1 %33 to i32
br label %38
36: ; preds = %23, %13, %9
%37 = tail call i32 @BN_CTX_end(i32* %3)
br label %38
38: ; preds = %32, %4, %36
%39 = phi i32 [ 0, %36 ], [ 0, %4 ], [ %35, %32 ]
ret i32 %39
}