From 3cf128d6da667d00bb5bb659413ea55a98a02aff Mon Sep 17 00:00:00 2001 From: mjfernez Date: Tue, 12 Oct 2021 20:18:28 -0400 Subject: Added description. x86 solutions for some problems --- 01-Multiples-of-3-and-5/asm/Makefile | 6 +++++ 01-Multiples-of-3-and-5/asm/euler1 | Bin 0 -> 17336 bytes 01-Multiples-of-3-and-5/asm/euler1.asm | 42 +++++++++++++++++++++++++++++++++ 01-Multiples-of-3-and-5/asm/euler1.o | Bin 0 -> 2384 bytes 4 files changed, 48 insertions(+) create mode 100644 01-Multiples-of-3-and-5/asm/Makefile create mode 100755 01-Multiples-of-3-and-5/asm/euler1 create mode 100644 01-Multiples-of-3-and-5/asm/euler1.asm create mode 100644 01-Multiples-of-3-and-5/asm/euler1.o (limited to '01-Multiples-of-3-and-5/asm') diff --git a/01-Multiples-of-3-and-5/asm/Makefile b/01-Multiples-of-3-and-5/asm/Makefile new file mode 100644 index 0000000..c34d1a2 --- /dev/null +++ b/01-Multiples-of-3-and-5/asm/Makefile @@ -0,0 +1,6 @@ +euler1: euler1.o + gcc euler1.o -o euler1 +euler1.o: euler1.asm + nasm -w+all -f elf64 -g -F stabs euler1.asm +clean: + rm -f euler1 euler1.o diff --git a/01-Multiples-of-3-and-5/asm/euler1 b/01-Multiples-of-3-and-5/asm/euler1 new file mode 100755 index 0000000..278476a Binary files /dev/null and b/01-Multiples-of-3-and-5/asm/euler1 differ diff --git a/01-Multiples-of-3-and-5/asm/euler1.asm b/01-Multiples-of-3-and-5/asm/euler1.asm new file mode 100644 index 0000000..9541295 --- /dev/null +++ b/01-Multiples-of-3-and-5/asm/euler1.asm @@ -0,0 +1,42 @@ +extern printf +SECTION .data +flag: db "%d",10,0 ; "%d\n\0" + +SECTION .text + global main + +main: + push rbp ; set up stack + mov rbp, rsp + xor rax, rax ; start at multiple (i = 0) + mov r11, 0 ; sum = 0 + mov r12, 1000 ; max = 1000 +.loop xor rdx, rdx ; clear rdx (remainder) + push rax ; save rax + mov rcx, 5 ; divisible by 5 + div rcx ; divide rdx:rax/rcx + cmp rdx, 0 ; compare only remainder + jz .sum ; if r = 0 , add to sum + xor rdx,rdx ; clear rdx + mov rax, QWORD [rsp] ; reload rax + mov rcx, 3 ; divisible by 3 + div rcx ; divide rdx:rax/rcx + cmp rdx, 0 ; compare only remainder + jnz .next ; if r = 0 , add to sum + +.sum add r11, QWORD [rsp] ; add to sum register + +.next pop rax ; return rax value from stack to be inc + inc rax ; i++ + cmp rax, r12 ; while rax < r12 (1000) + jl .loop ; repeat + + mov rdi, flag ; arg 1 (format) + mov rsi, r11 ; arg 2 (value) + mov rax, 0 ; no xmm registers + call printf wrt ..plt + pop rbp + + mov rax, 0 + ret + diff --git a/01-Multiples-of-3-and-5/asm/euler1.o b/01-Multiples-of-3-and-5/asm/euler1.o new file mode 100644 index 0000000..b45c7c1 Binary files /dev/null and b/01-Multiples-of-3-and-5/asm/euler1.o differ -- cgit v1.2.3