From: cuz <cuz@b7a2c559-68d2-44c3-8de9-860c34a00d81>
Date: Tue, 16 Dec 2003 21:10:18 +0000 (+0000)
Subject: Use .repeat to unroll the loop.
X-Git-Tag: V2.12.0~1033
X-Git-Url: https://git.sur5r.net/?a=commitdiff_plain;h=cb9a4e91e1ade2458a19aeedbd23bdfc9d1fb30b;p=cc65

Use .repeat to unroll the loop.
Squeeze out two bytes.


git-svn-id: svn://svn.cc65.org/cc65/trunk@2775 b7a2c559-68d2-44c3-8de9-860c34a00d81
---

diff --git a/libsrc/common/memset.s b/libsrc/common/memset.s
index f9a1ecd08..62c83fb5e 100644
--- a/libsrc/common/memset.s
+++ b/libsrc/common/memset.s
@@ -21,19 +21,17 @@ _bzero:
 __bzero:
         sta     ptr3
         stx     ptr3+1          ; Save n
-        lda     #0
-        sta     tmp1            ; fill with zeros
+        lda     #0		; Fill with zeros
         beq     common
-
+	
 _memset:
  	sta	ptr3		; Save n
  	stx	ptr3+1
  	jsr	popax  	 	; Get c
-       	sta	tmp1		; Save c
 
 ; Common stuff for memset and bzero from here
 
-common:
+common:	sta	tmp1		; Save the fill value
         ldy     #1
         lda     (sp),y
         tax
@@ -49,10 +47,10 @@ common:
 
 ; Set 256 byte blocks
 
-L1:	sta	(ptr1),y	; Set one byte
+L1:    	.repeat 2		; Unroll this a bit to make it faster
+	sta	(ptr1),y	; Set one byte
   	iny
-	sta	(ptr1),y	; Unroll this a bit to make it faster
-	iny
+	.endrepeat
   	bne	L1
 	inc	ptr1+1
        	dex			; Next 256 byte block