CS Lab machines have met their nemesis

[ipdf/code.git] / src / add_digits_asm.s

diff --git a/src/add_digits_asm.s b/src/add_digits_asm.s
deleted file mode 100644 (file)
index 8144acc..0000000
--- a/src/add_digits_asm.s
+++ /dev/null
@@ -1,29 +0,0 @@
-.section .text
-.globl add_digits
-.type add_digits, @function
-
-# Add two arrays of 64 bit digits, with carry, modifying the first argument
-# Address at first argument %rdi is array to add and modify
-# Address at second %rsi will be added (not modified)
-# Third argument is counter of number of digits
-# Result in %rax is the final result in the carry flag
-# Exploits the fact that inc and dec do not affect the carry flag
-add_digits:
-       addq $0, %rax
-       loop:
-               movq (%rsi), %rax # Temporarily store digit from second array
-               adcq %rax, (%rdi) # Add digits in second and first array, store in first
-               dec %rdx # Decrement counter
-               jz end_loop # We are done
-               
-               # Move to next element in the first array
-               leaq 8(,%rdi,1), %rdi
-               # Move to next element in the second array
-               leaq 8(,%rsi,1), %rsi
-               jmp loop # Repeat
-       end_loop:
-               movq $0, %rax
-               jnc end
-               movq $1, %rax
-       end:
-               ret # We are done