refactor(quicksort): renamed to qsort to quicksort and added helper function for better interface

1 files changed, 24 insertions, 6 deletions

diff --git a/src/qsort.s b/src/quicksort.s
index 564a25e..78b9eea 100755
--- a/src/qsort.s
+++ b/src/quicksort.s
@@ -1,5 +1,23 @@
 # --------------------------------------------
-# FUNCTION: qsort
+# FUNCTION: quicksort
+# PURPOSE : Calls the _quicksort function with the right parameters
+# INPUTS  : rdi = address for A
+#           rsi = number of coordinates n
+#           rdx = index of key to sort by
+# OUTPUTS : rax = address for sorted A
+# NOTES   : preserves rdi, rdx
+# --------------------------------------------
+.section .text
+.globl quicksort
+.type quicksort, @function
+quicksort:
+    leaq -1(%rsi), %rcx
+    xorq %rsi, %rsi
+    call _quicksort
+    ret
+
+# --------------------------------------------
+# FUNCTION: _quicksort
 # PURPOSE : Sorts array A, with references to arrays A_i,
 #           based on the given key in A_i,
 #           address and size of A.
@@ -11,9 +29,9 @@
 # NOTES   : preserves rdi, rdx
 # --------------------------------------------
 .section .text
-.globl qsort
-.type qsort, @function
-qsort:
+# .globl _quicksort
+.type _quicksort, @function
+_quicksort:
     pushq %r12
     pushq %r13
     pushq %r14
@@ -34,12 +52,12 @@ qsort:
 # --- left recursion ---
     movq %r12, %rsi             # low
     movq %r14, %rcx             # high = p
-    call qsort
+    call _quicksort
     
 # --- right recursion ---
     leaq 1(%r14), %rsi          # low = p + 1
     movq %r13, %rcx             # high
-    call qsort
+    call _quicksort
 
 .qsort_exit:
     movq %rdi, %rax