From 5b8ba5a949627183c116d8216cfc6f2af0ea4d9b Mon Sep 17 00:00:00 2001
From: Nao Pross <naopross@thearcway.org>
Date: Tue, 4 Dec 2018 21:51:39 +0100
Subject: Add perftest, update b32e to use a counter instead of mul

---
 b32e.asm | 22 ++++++++--------------
 1 file changed, 8 insertions(+), 14 deletions(-)

(limited to 'b32e.asm')

diff --git a/b32e.asm b/b32e.asm
index 8bab796..1e1b7a9 100644
--- a/b32e.asm
+++ b/b32e.asm
@@ -43,10 +43,12 @@ write_output:
 b32e:
     ; save the number of bits read in cl
     mov bl, 8 ; each byte contains 8 bits
-    mul bl
+    mul bl ; multiply al by 8
     mov cl, al
     ; set up output counter
     xor r11, r11
+    ; set up processed bit counter
+    xor ch, ch 
     ; initialize output buffer with padding
     mov rbx, 0x3d3d3d3d3d3d3d3d
     mov qword [output_buffer], rbx
@@ -70,21 +72,13 @@ b32e:
     mov bl, byte [rbx]
     mov byte [output_buffer + r11], bl 
 
-    ; increase counter
+    ; increase output counter
     inc r11
+    ; increase bit counter
+    add ch, 5
 
-    ; check number of bits converted >= bits read
-    mov bl, 5 ; each iteration processed 5 bits
-    mov rax, r11
-    mul bl
-    cmp al, cl
-    jge .exit
-
-    ; check counter
-    ; when the counter reaches 8 it means that 8 characters (40 bits)
-    ; have been processed and written
-    cmp r11, 8
-    jl .loop 
+    cmp ch, cl
+    jl .loop
 
 .exit:
     ret
-- 
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