lib1funcs.asm (divnorm, modnorm): Optimize by using ccr.

	* config/h8300/lib1funcs.asm (divnorm, modnorm): Optimize by
	using ccr.

From-SVN: r76573

diff --git a/gcc/ChangeLog b/gcc/ChangeLog
index 937288934a2aff67f44e11d2a20285f0c5c56b2e..b3be4d2bc50e116035e04e4225601a461f269223 100644 (file)
--- a/gcc/ChangeLog
+++ b/gcc/ChangeLog
@@ -1,3 +1,8 @@
+2004-01-25  Kazu Hirata  <kazu@cs.umass.edu>
+
+       * config/h8300/lib1funcs.asm (divnorm, modnorm): Optimize by
+       using ccr.
+
 2004-01-25  Kazu Hirata  <kazu@cs.umass.edu>
 
        * config/i860/i860-protos.h: Remove the prototype for

diff --git a/gcc/config/h8300/lib1funcs.asm b/gcc/config/h8300/lib1funcs.asm
index 93656275efebc8688d4d9deccc5bd4b297b090e6..985ec36e317da4190557b23ee107088f9918fe44 100644 (file)
--- a/gcc/config/h8300/lib1funcs.asm
+++ b/gcc/config/h8300/lib1funcs.asm
@@ -2,7 +2,8 @@
 ;; Contributed by Steve Chamberlain <sac@cygnus.com>
 ;; Optimizations by Toshiyasu Morita <toshiyasu.morita@renesas.com>
 
-/* Copyright (C) 1994, 2000, 2001, 2002 Free Software Foundation, Inc.
+/* Copyright (C) 1994, 2000, 2001, 2002, 2003, 2004
+   Free Software Foundation, Inc.
 
 This file is free software; you can redistribute it and/or modify it
 under the terms of the GNU General Public License as published by the
@@ -174,30 +175,28 @@ ___ucmpsi2:
        .section .text
        .align 2
 divnorm:
-       mov.b   #0x0,A2L
        or      A0H,A0H         ; is divisor > 0
+       stc     ccr,A2L
        bge     _lab1
        not     A0H             ; no - then make it +ve
        not     A0L
        adds    #1,A0
-       xor     #0x1,A2L        ; and remember that in A2L
 _lab1: or      A1H,A1H ; look at dividend
        bge     _lab2
        not     A1H             ; it is -ve, make it positive
        not     A1L
        adds    #1,A1
-       xor     #0x1,A2L; and toggle sign of result
+       xor     #0x8,A2L; and toggle sign of result
 _lab2: rts
 ;; Basically the same, except that the sign of the divisor determines
 ;; the sign.
 modnorm:
-       mov.b   #0x0,A2L
        or      A0H,A0H         ; is divisor > 0
+       stc     ccr,A2L
        bge     _lab7
        not     A0H             ; no - then make it +ve
        not     A0L
        adds    #1,A0
-       xor     #0x1,A2L        ; and remember that in A2L
 _lab7: or      A1H,A1H ; look at dividend
        bge     _lab8
        not     A1H             ; it is -ve, make it positive
@@ -211,7 +210,7 @@ _lab8:      rts
 ___divhi3:
        bsr     divnorm
        bsr     ___udivhi3
-negans:        or      A2L,A2L ; should answer be negative ?
+negans:        btst    #3,A2L  ; should answer be negative ?
        beq     _lab4
        not     A0H     ; yes, so make it so
        not     A0L