From 7f57ba6f0646457eb784f7c6bf3e328e86eeabd0 Mon Sep 17 00:00:00 2001
From: mgcaret <mgcaret@users.noreply.github.com>
Date: Fri, 3 Jan 2020 19:41:25 -0800
Subject: [PATCH] resolve #4, h/t ksherlock

---
 asm/mathlib.s | 11 +++--------
 1 file changed, 3 insertions(+), 8 deletions(-)

diff --git a/asm/mathlib.s b/asm/mathlib.s
index ea03cff..342862b 100644
--- a/asm/mathlib.s
+++ b/asm/mathlib.s
@@ -8,14 +8,9 @@
           lda   STACKBASE+6,x
           eor   STACKBASE+2,x
           bpl   samesign
-          lda   STACKBASE+4,x
-          cmp   STACKBASE+0,x
-          lda   STACKBASE+6,x
-          sbc   STACKBASE+2,x
-          bvs   :+
-          eor   #$8000
-:         sec                       ; make sure we don't set Z
-          rol                       ; move comparison into carry
+          lda   STACKBASE+2,x       ; Kelvin's excellent solution
+          sec
+          rol
           rts
 samesign: lda   STACKBASE+6,x
           cmp   STACKBASE+2,x