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--- archi:y86 [2018/09/12 09:55] – orel
+++ archi:y86 [2024/03/18 15:06] (current) – external edit 127.0.0.1
@@ Line 682: / Line 682: @@
+==== En vrac ====
+<code - td04_exo1.ys>
+.pos 0
+irmovl stack, %esp
+jmp main
+# f(long *x, long y)
+f:
+mrmovl 4(%esp),%eax   # x
+mrmovl 8(%esp),%ecx   # y
+rmmovl %ecx,(%eax)    # *x = y
+ret
+# main
+main:
+mrmovl u, %eax
+pushl %eax          # empiler 2eme arg (u)
+irmovl t, %eax
+pushl %eax          # empiler 1er arg (&t)
+call f
+iaddl 8,%esp        # depiler les args
+halt
+.pos 0x100
+t: .long 0
+u: .long 2
+.pos 0x200
+stack:
+</code>
+<code - td04_exo2.ys>
+.pos 0
+irmovl stack, %esp
+jmp main
+# f(long n, long * t)
+f:
+mrmovl 4(%esp),%ecx   # n
+mrmovl 8(%esp),%eax   # t
+loop:
+isubl 1, %ecx
+jl end
+mrmovl (%eax),%edx    # load *t
+iaddl 1, %edx         # inc
+rmmovl %edx, (%eax)   # store *t
+iaddl 4,%eax          # t++
+jmp loop
+end:
+ret
+# main
+main:
+irmovl t, %eax
+pushl %eax          # empiler 2eme arg (adresse t)
+mrmovl n, %eax
+pushl %eax          # empiler 1er arg (valeur n)
+call f
+iaddl 8,%esp        # depiler les args
+halt
+.pos 0x100
+n: .long 4
+t:
+.long 1
+.long 2
+.long 3
+.long 4
+.pos 0x200
+stack:
+</code>
+<code - td04_exo3.ys>
+.pos 0
+irmovl stack, %esp
+jmp main
+# sommme(long n, long v[0], long v[1], ...)
+f:
+pushl %ebx            # save callee-saved registry
+xorl %eax,%eax        # sum = 0
+mrmovl 8(%esp),%ecx   # n
+rrmovl %esp,%ebx
+iaddl 12, %ebx         # v
+loop:
+isubl 1, %ecx
+jl end
+mrmovl (%ebx),%edx    # load *v
+addl %edx,%eax        # sum += *v
+rmmovl %edx, (%ebx)   # store *v
+iaddl 4,%ebx          # v++
+jmp loop
+end:
+popl %ebx             # restore callee-saved registry
+ret  # %eax
+# main
+main:
+irmovl 3, %eax
+pushl %eax          # empiler v2
+irmovl 2, %eax
+pushl %eax          # empiler v1
+irmovl 1, %eax
+pushl %eax          # empiler v0
+irmovl 3, %eax
+pushl %eax          # empiler n
+call f
+iaddl 16,%esp        # depiler les args
+halt
+.pos 0x100
+n: .long 4
+.pos 0x200
+stack:
+</code>