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| author | Kazu Hirata <kazu@cs.umass.edu> | 2004-01-25 17:51:51 +0000 |
|---|---|---|
| committer | Kazu Hirata <kazu@gcc.gnu.org> | 2004-01-25 17:51:51 +0000 |
| commit | cff555dccdb73f52ab49ccf65e7f23263248ee86 (patch) | |
| tree | 22bc75f588f0a64706c1b78b24433cb1927c255c | |
| parent | 30f58b01a438ce9b02693331ee76995352c28db8 (diff) | |
| download | gcc-cff555dccdb73f52ab49ccf65e7f23263248ee86.zip gcc-cff555dccdb73f52ab49ccf65e7f23263248ee86.tar.gz gcc-cff555dccdb73f52ab49ccf65e7f23263248ee86.tar.bz2 | |
lib1funcs.asm (divnorm, modnorm): Optimize by using ccr.
* config/h8300/lib1funcs.asm (divnorm, modnorm): Optimize by
using ccr.
From-SVN: r76573
| -rw-r--r-- | gcc/ChangeLog | 5 | ||||
| -rw-r--r-- | gcc/config/h8300/lib1funcs.asm | 13 |
2 files changed, 11 insertions, 7 deletions
diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 9372889..b3be4d2 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,5 +1,10 @@ 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 i860_saveregs. * config/i860/i860.c (i860_saveregs): Make it static. diff --git a/gcc/config/h8300/lib1funcs.asm b/gcc/config/h8300/lib1funcs.asm index 9365627..985ec36 100644 --- 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 |