Beispiele 4.4.2024

20230316/add-01-O0.s

+	.file	"add-01.c"
+	.text
+	.section	.rodata
+.LC0:
+	.string	"%llu\n"
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.cfi_startproc
+	pushq	%rbp
+	.cfi_def_cfa_offset 16
+	.cfi_offset 6, -16
+	movq	%rsp, %rbp
+	.cfi_def_cfa_register 6
+	subq	$32, %rsp
+	movabsq	$5000000000, %rax
+	movq	%rax, -8(%rbp)
+	movabsq	$6000000000, %rax
+	movq	%rax, -16(%rbp)
+	movq	-8(%rbp), %rdx
+	movq	-16(%rbp), %rax
+	addq	%rdx, %rax
+	movq	%rax, -24(%rbp)
+	movq	-24(%rbp), %rax
+	movq	%rax, %rsi
+	leaq	.LC0(%rip), %rax
+	movq	%rax, %rdi
+	movl	$0, %eax
+	call	printf@PLT
+	movl	$0, %eax
+	leave
+	.cfi_def_cfa 7, 8
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	main, .-main
+	.ident	"GCC: (Debian 12.2.0-14) 12.2.0"
+	.section	.note.GNU-stack,"",@progbits

20230316/add-01-O1.s

+	.file	"add-01.c"
+	.text
+	.section	.rodata.str1.1,"aMS",@progbits,1
+.LC0:
+	.string	"%llu\n"
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB11:
+	.cfi_startproc
+	subq	$8, %rsp
+	.cfi_def_cfa_offset 16
+	movabsq	$11000000000, %rsi
+	leaq	.LC0(%rip), %rdi
+	movl	$0, %eax
+	call	printf@PLT
+	movl	$0, %eax
+	addq	$8, %rsp
+	.cfi_def_cfa_offset 8
+	ret
+	.cfi_endproc
+.LFE11:
+	.size	main, .-main
+	.ident	"GCC: (Debian 12.2.0-14) 12.2.0"
+	.section	.note.GNU-stack,"",@progbits

20230316/add-01-m32-O0.s

+	.file	"add-01.c"
+	.text
+	.section	.rodata
+.LC0:
+	.string	"%llu\n"
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB0:
+	.cfi_startproc
+	leal	4(%esp), %ecx
+	.cfi_def_cfa 1, 0
+	andl	$-16, %esp
+	pushl	-4(%ecx)
+	pushl	%ebp
+	movl	%esp, %ebp
+	.cfi_escape 0x10,0x5,0x2,0x75,0
+	pushl	%esi
+	pushl	%ebx
+	pushl	%ecx
+	.cfi_escape 0xf,0x3,0x75,0x74,0x6
+	.cfi_escape 0x10,0x6,0x2,0x75,0x7c
+	.cfi_escape 0x10,0x3,0x2,0x75,0x78
+	subl	$44, %esp
+	call	__x86.get_pc_thunk.si
+	addl	$_GLOBAL_OFFSET_TABLE_, %esi
+	movl	$705032704, -32(%ebp)
+	movl	$1, -28(%ebp)
+	movl	$1705032704, -40(%ebp)
+	movl	$1, -36(%ebp)
+	movl	-32(%ebp), %ecx
+	movl	-28(%ebp), %ebx
+	movl	-40(%ebp), %eax
+	movl	-36(%ebp), %edx
+	addl	%ecx, %eax
+	adcl	%ebx, %edx
+	movl	%eax, -48(%ebp)
+	movl	%edx, -44(%ebp)
+	subl	$4, %esp
+	pushl	-44(%ebp)
+	pushl	-48(%ebp)
+	leal	.LC0@GOTOFF(%esi), %eax
+	pushl	%eax
+	movl	%esi, %ebx
+	call	printf@PLT
+	addl	$16, %esp
+	movl	$0, %eax
+	leal	-12(%ebp), %esp
+	popl	%ecx
+	.cfi_restore 1
+	.cfi_def_cfa 1, 0
+	popl	%ebx
+	.cfi_restore 3
+	popl	%esi
+	.cfi_restore 6
+	popl	%ebp
+	.cfi_restore 5
+	leal	-4(%ecx), %esp
+	.cfi_def_cfa 4, 4
+	ret
+	.cfi_endproc
+.LFE0:
+	.size	main, .-main
+	.section	.text.__x86.get_pc_thunk.si,"axG",@progbits,__x86.get_pc_thunk.si,comdat
+	.globl	__x86.get_pc_thunk.si
+	.hidden	__x86.get_pc_thunk.si
+	.type	__x86.get_pc_thunk.si, @function
+__x86.get_pc_thunk.si:
+.LFB1:
+	.cfi_startproc
+	movl	(%esp), %esi
+	ret
+	.cfi_endproc
+.LFE1:
+	.ident	"GCC: (Debian 12.2.0-14) 12.2.0"
+	.section	.note.GNU-stack,"",@progbits

20230316/add-01-m32-O1.s

+	.file	"add-01.c"
+	.text
+	.section	.rodata.str1.1,"aMS",@progbits,1
+.LC0:
+	.string	"%llu\n"
+	.text
+	.globl	main
+	.type	main, @function
+main:
+.LFB11:
+	.cfi_startproc
+	leal	4(%esp), %ecx
+	.cfi_def_cfa 1, 0
+	andl	$-16, %esp
+	pushl	-4(%ecx)
+	pushl	%ebp
+	movl	%esp, %ebp
+	.cfi_escape 0x10,0x5,0x2,0x75,0
+	pushl	%ebx
+	pushl	%ecx
+	.cfi_escape 0xf,0x3,0x75,0x78,0x6
+	.cfi_escape 0x10,0x3,0x2,0x75,0x7c
+	call	__x86.get_pc_thunk.bx
+	addl	$_GLOBAL_OFFSET_TABLE_, %ebx
+	subl	$4, %esp
+	pushl	$2
+	pushl	$-1884901888
+	leal	.LC0@GOTOFF(%ebx), %eax
+	pushl	%eax
+	call	printf@PLT
+	addl	$16, %esp
+	movl	$0, %eax
+	leal	-8(%ebp), %esp
+	popl	%ecx
+	.cfi_restore 1
+	.cfi_def_cfa 1, 0
+	popl	%ebx
+	.cfi_restore 3
+	popl	%ebp
+	.cfi_restore 5
+	leal	-4(%ecx), %esp
+	.cfi_def_cfa 4, 4
+	ret
+	.cfi_endproc
+.LFE11:
+	.size	main, .-main
+	.section	.text.__x86.get_pc_thunk.bx,"axG",@progbits,__x86.get_pc_thunk.bx,comdat
+	.globl	__x86.get_pc_thunk.bx
+	.hidden	__x86.get_pc_thunk.bx
+	.type	__x86.get_pc_thunk.bx, @function
+__x86.get_pc_thunk.bx:
+.LFB12:
+	.cfi_startproc
+	movl	(%esp), %ebx
+	ret
+	.cfi_endproc
+.LFE12:
+	.ident	"GCC: (Debian 12.2.0-14) 12.2.0"
+	.section	.note.GNU-stack,"",@progbits

20230316/add-01.c

+#include <stdio.h>
+#include <stdint.h>
+
+int main (void)
+{
+  uint64_t x = 5000000000;
+  uint64_t y = 6000000000;
+  uint64_t z = x + y;
+  printf ("%llu\n", z);
+  return 0;
+}

20230316/add-02.c

+#include <stdio.h>
+#include <stdint.h>
+#include <inttypes.h>
+
+int main (void)
+{
+  uint64_t x = 5000000000;
+  uint64_t y = 6000000000;
+  uint64_t z = x + y;
+  printf ("%" PRIu64 "\n", z);
+  return 0;
+}

20230316/arrays-and-pointers-01.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[] = "Test";
+  char *p = "Test";
+  printf ("a = %s, p = %s\n", a, p);
+  return 0;
+}

20230316/arrays-and-pointers-02.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[] = { 84, 101, 115, 116, 0 };
+  char *p = "Test";
+  printf ("a = %s, p = %s\n", a, p);
+  return 0;
+}

20230316/arrays-and-pointers-03.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[] = { 84, 101, 115, 116, 0 };
+  char *p = "Test";
+  printf ("a = %s, p = %s\n", &a, &p);
+  return 0;
+}

20230316/arrays-and-pointers-04.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", p[i]);
+  return 0;
+}

20230316/arrays-and-pointers-05.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", *p++);
+  return 0;
+}

20230316/arrays-and-pointers-06.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", p[i]++);
+  return 0;
+}

20230316/arrays-and-pointers-07.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    {
+      char *q;
+      printf ("%s ", q = p[i]++);
+      printf ("%s\n", q);
+    }
+  return 0;
+}

20230316/arrays-and-pointers-08.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  char **p = a;
+  for (int i = 0; i < 4; i++)
+    {
+      printf ("%s ", p[i]++);
+      printf ("%s\n", p[i]);
+    }
+  return 0;
+}

20230316/arrays-and-pointers-09.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test" };
+  for (char **p = a; p < a + 4; p++)
+    printf ("%s\n", *p);
+  return 0;
+}

20230316/arrays-and-pointers-10.c

+#include <stdio.h>
+
+int main (void)
+{
+  char *a[] = { "Dies", "ist", "ein", "Test", NULL };
+  for (char **p = a; *p; p++)
+    printf ("%s\n", *p);
+  return 0;
+}

20230316/arrays-and-pointers-11.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test" };
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", a[i]);
+  return 0;
+}

20230316/arrays-and-pointers-12.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][] = { "Dies", "ist", "ein", "Test" };
+  for (int i = 0; i < 4; i++)
+    printf ("%s\n", a[i]);
+  return 0;
+}

20230316/arrays-and-pointers-13.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test", "" };
+  for (char *p = a; *p; p++)
+    printf ("%s\n", *p);
+  return 0;
+}

20230316/arrays-and-pointers-14.c

+#include <stdio.h>
+
+int main (void)
+{
+  char a[][5] = { "Dies", "ist", "ein", "Test", "" };
+  for (char **p = a; **p; p++)
+    printf ("%s\n", *p);
+  return 0;
+}