procyberian/gcc
1
0
Fork 0
Code Issues Pull requests Projects Releases Packages Wiki Activity Actions

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

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

From-SVN: r76573
This commit is contained in:
Kazu Hirata 2004-01-25 17:51:51 +00:00 • committed by Kazu Hirata
parent 30f58b01a4
commit cff555dccd
2 changed files with 11 additions and 7 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

5
gcc/ChangeLog
View file

@ -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

13
gcc/config/h8300/lib1funcs.asm
View file

@ -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