3b041227f7
We chan't share code for udivsi3 and udivsi3_i4, because they have a different clobber list. Copy udivsi3 from gcc-4.1.2. As shown in arch/sh/lib/udivsi3.S (and -Os.S), .global __udivsi3_i4i .global __udivsi3_i4 .global __udivsi3 __udivsi3_i4i: ... Three symbols are sharing one code, which is actually udivsi3_i4i. But, this results unwanted code with gcc 4.1. In gcc, these three are treated as pseudo instructions that have their own clobber list apart from the usual calling convention. According to sh's machine description. The clobber list is as follows: - udivsi3_i4i : t,r1,pr,mach,macl - udivsi3_i4 : t,r0,r1,r4,r5,pr,dr0,dr2,dr4 - udivsi3 : t,r4,pr The caller of udivsi3 will be left with a broken r1 and mac*. gcc-4.1.x and older(at least to 3.4) generate udivsi3. ST's gcc-4.1.1 seems to be OK because it has _i4i. Signed-off-by: Takashi YOSHII <yoshii.takashi@renesas.com> Signed-off-by: Paul Mundt <lethal@linux-sh.org>
666 lines
10 KiB
ArmAsm
666 lines
10 KiB
ArmAsm
/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
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2004, 2005, 2006
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Free Software Foundation, Inc.
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This file is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by the
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Free Software Foundation; either version 2, or (at your option) any
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later version.
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In addition to the permissions in the GNU General Public License, the
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Free Software Foundation gives you unlimited permission to link the
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compiled version of this file into combinations with other programs,
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and to distribute those combinations without any restriction coming
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from the use of this file. (The General Public License restrictions
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do apply in other respects; for example, they cover modification of
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the file, and distribution when not linked into a combine
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executable.)
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This file is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; see the file COPYING. If not, write to
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the Free Software Foundation, 51 Franklin Street, Fifth Floor,
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Boston, MA 02110-1301, USA. */
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!! libgcc routines for the Renesas / SuperH SH CPUs.
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!! Contributed by Steve Chamberlain.
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!! sac@cygnus.com
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!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
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!! recoded in assembly by Toshiyasu Morita
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!! tm@netcom.com
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/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
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ELF local label prefixes by J"orn Rennecke
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amylaar@cygnus.com */
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/* This code used shld, thus is not suitable for SH1 / SH2. */
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/* Signed / unsigned division without use of FPU, optimized for SH4.
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Uses a lookup table for divisors in the range -128 .. +128, and
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div1 with case distinction for larger divisors in three more ranges.
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The code is lumped together with the table to allow the use of mova. */
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#ifdef CONFIG_CPU_LITTLE_ENDIAN
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#define L_LSB 0
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#define L_LSWMSB 1
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#define L_MSWLSB 2
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#else
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#define L_LSB 3
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#define L_LSWMSB 2
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#define L_MSWLSB 1
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#endif
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.balign 4
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.global __udivsi3_i4i
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.global __udivsi3_i4
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.set __udivsi3_i4, __udivsi3_i4i
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.type __udivsi3_i4i, @function
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__udivsi3_i4i:
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mov.w c128_w, r1
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div0u
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mov r4,r0
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shlr8 r0
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cmp/hi r1,r5
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extu.w r5,r1
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bf udiv_le128
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cmp/eq r5,r1
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bf udiv_ge64k
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shlr r0
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mov r5,r1
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shll16 r5
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mov.l r4,@-r15
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div1 r5,r0
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mov.l r1,@-r15
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div1 r5,r0
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div1 r5,r0
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bra udiv_25
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div1 r5,r0
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div_le128:
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mova div_table_ix,r0
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bra div_le128_2
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mov.b @(r0,r5),r1
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udiv_le128:
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mov.l r4,@-r15
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mova div_table_ix,r0
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mov.b @(r0,r5),r1
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mov.l r5,@-r15
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div_le128_2:
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mova div_table_inv,r0
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mov.l @(r0,r1),r1
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mov r5,r0
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tst #0xfe,r0
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mova div_table_clz,r0
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dmulu.l r1,r4
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mov.b @(r0,r5),r1
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bt/s div_by_1
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mov r4,r0
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mov.l @r15+,r5
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sts mach,r0
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/* clrt */
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addc r4,r0
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mov.l @r15+,r4
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rotcr r0
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rts
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shld r1,r0
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div_by_1_neg:
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neg r4,r0
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div_by_1:
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mov.l @r15+,r5
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rts
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mov.l @r15+,r4
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div_ge64k:
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bt/s div_r8
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div0u
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shll8 r5
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bra div_ge64k_2
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div1 r5,r0
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udiv_ge64k:
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cmp/hi r0,r5
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mov r5,r1
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bt udiv_r8
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shll8 r5
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mov.l r4,@-r15
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div1 r5,r0
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mov.l r1,@-r15
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div_ge64k_2:
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div1 r5,r0
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mov.l zero_l,r1
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.rept 4
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div1 r5,r0
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.endr
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mov.l r1,@-r15
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div1 r5,r0
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mov.w m256_w,r1
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div1 r5,r0
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mov.b r0,@(L_LSWMSB,r15)
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xor r4,r0
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and r1,r0
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bra div_ge64k_end
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xor r4,r0
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div_r8:
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shll16 r4
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bra div_r8_2
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shll8 r4
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udiv_r8:
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mov.l r4,@-r15
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shll16 r4
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clrt
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shll8 r4
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mov.l r5,@-r15
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div_r8_2:
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rotcl r4
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mov r0,r1
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div1 r5,r1
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mov r4,r0
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rotcl r0
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mov r5,r4
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div1 r5,r1
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.rept 5
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rotcl r0; div1 r5,r1
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.endr
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rotcl r0
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mov.l @r15+,r5
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div1 r4,r1
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mov.l @r15+,r4
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rts
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rotcl r0
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.global __sdivsi3_i4i
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.global __sdivsi3_i4
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.global __sdivsi3
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.set __sdivsi3_i4, __sdivsi3_i4i
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.set __sdivsi3, __sdivsi3_i4i
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.type __sdivsi3_i4i, @function
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/* This is link-compatible with a __sdivsi3 call,
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but we effectively clobber only r1. */
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__sdivsi3_i4i:
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mov.l r4,@-r15
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cmp/pz r5
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mov.w c128_w, r1
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bt/s pos_divisor
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cmp/pz r4
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mov.l r5,@-r15
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neg r5,r5
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bt/s neg_result
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cmp/hi r1,r5
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neg r4,r4
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pos_result:
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extu.w r5,r0
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bf div_le128
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cmp/eq r5,r0
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mov r4,r0
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shlr8 r0
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bf/s div_ge64k
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cmp/hi r0,r5
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div0u
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shll16 r5
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div1 r5,r0
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div1 r5,r0
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div1 r5,r0
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udiv_25:
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mov.l zero_l,r1
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div1 r5,r0
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div1 r5,r0
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mov.l r1,@-r15
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.rept 3
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div1 r5,r0
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.endr
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mov.b r0,@(L_MSWLSB,r15)
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xtrct r4,r0
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swap.w r0,r0
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.rept 8
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div1 r5,r0
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.endr
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mov.b r0,@(L_LSWMSB,r15)
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div_ge64k_end:
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.rept 8
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div1 r5,r0
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.endr
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mov.l @r15+,r4 ! zero-extension and swap using LS unit.
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extu.b r0,r0
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mov.l @r15+,r5
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or r4,r0
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mov.l @r15+,r4
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rts
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rotcl r0
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div_le128_neg:
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tst #0xfe,r0
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mova div_table_ix,r0
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mov.b @(r0,r5),r1
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mova div_table_inv,r0
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bt/s div_by_1_neg
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mov.l @(r0,r1),r1
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mova div_table_clz,r0
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dmulu.l r1,r4
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mov.b @(r0,r5),r1
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mov.l @r15+,r5
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sts mach,r0
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/* clrt */
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addc r4,r0
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mov.l @r15+,r4
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rotcr r0
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shld r1,r0
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rts
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neg r0,r0
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pos_divisor:
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mov.l r5,@-r15
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bt/s pos_result
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cmp/hi r1,r5
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neg r4,r4
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neg_result:
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extu.w r5,r0
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bf div_le128_neg
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cmp/eq r5,r0
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mov r4,r0
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shlr8 r0
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bf/s div_ge64k_neg
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cmp/hi r0,r5
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div0u
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mov.l zero_l,r1
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shll16 r5
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div1 r5,r0
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mov.l r1,@-r15
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.rept 7
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div1 r5,r0
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.endr
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mov.b r0,@(L_MSWLSB,r15)
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xtrct r4,r0
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swap.w r0,r0
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.rept 8
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div1 r5,r0
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.endr
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mov.b r0,@(L_LSWMSB,r15)
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div_ge64k_neg_end:
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.rept 8
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div1 r5,r0
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.endr
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mov.l @r15+,r4 ! zero-extension and swap using LS unit.
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extu.b r0,r1
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mov.l @r15+,r5
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or r4,r1
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div_r8_neg_end:
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mov.l @r15+,r4
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rotcl r1
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rts
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neg r1,r0
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div_ge64k_neg:
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bt/s div_r8_neg
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div0u
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shll8 r5
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mov.l zero_l,r1
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.rept 6
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div1 r5,r0
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.endr
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mov.l r1,@-r15
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div1 r5,r0
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mov.w m256_w,r1
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div1 r5,r0
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mov.b r0,@(L_LSWMSB,r15)
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xor r4,r0
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and r1,r0
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bra div_ge64k_neg_end
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xor r4,r0
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c128_w:
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.word 128
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div_r8_neg:
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clrt
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shll16 r4
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mov r4,r1
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shll8 r1
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mov r5,r4
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.rept 7
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rotcl r1; div1 r5,r0
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.endr
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mov.l @r15+,r5
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rotcl r1
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bra div_r8_neg_end
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div1 r4,r0
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m256_w:
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.word 0xff00
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/* This table has been generated by divtab-sh4.c. */
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.balign 4
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div_table_clz:
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.byte 0
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.byte 1
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.byte 0
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.byte -1
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.byte -1
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.byte -2
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.byte -2
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.byte -2
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.byte -2
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.byte -3
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.byte -3
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.byte -3
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.byte -3
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.byte -3
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.byte -3
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.byte -3
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.byte -3
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -4
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -5
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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.byte -6
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/* Lookup table translating positive divisor to index into table of
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normalized inverse. N.B. the '0' entry is also the last entry of the
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previous table, and causes an unaligned access for division by zero. */
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div_table_ix:
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.byte -6
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.byte -128
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.byte -128
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.byte 0
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.byte -128
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.byte -64
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.byte 0
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.byte 64
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.byte -128
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.byte -96
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.byte -64
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.byte -32
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.byte 0
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.byte 32
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.byte 64
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.byte 96
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.byte -128
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.byte -112
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.byte -96
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.byte -80
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.byte -64
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.byte -48
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.byte -32
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.byte -16
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.byte 0
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.byte 16
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.byte 32
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.byte 48
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.byte 64
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.byte 80
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.byte 96
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.byte 112
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.byte -128
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.byte -120
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.byte -112
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.byte -104
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.byte -96
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.byte -88
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.byte -80
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.byte -72
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.byte -64
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.byte -56
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.byte -48
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.byte -40
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.byte -32
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.byte -24
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.byte -16
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.byte -8
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.byte 0
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.byte 8
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.byte 16
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.byte 24
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.byte 32
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.byte 40
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.byte 48
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.byte 56
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.byte 64
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.byte 72
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.byte 80
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.byte 88
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.byte 96
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.byte 104
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.byte 112
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.byte 120
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.byte -128
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.byte -124
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.byte -120
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.byte -116
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.byte -112
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.byte -108
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.byte -104
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.byte -100
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.byte -96
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.byte -92
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.byte -88
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.byte -84
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.byte -80
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.byte -76
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.byte -72
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.byte -68
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.byte -64
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.byte -60
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.byte -56
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.byte -52
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.byte -48
|
|
.byte -44
|
|
.byte -40
|
|
.byte -36
|
|
.byte -32
|
|
.byte -28
|
|
.byte -24
|
|
.byte -20
|
|
.byte -16
|
|
.byte -12
|
|
.byte -8
|
|
.byte -4
|
|
.byte 0
|
|
.byte 4
|
|
.byte 8
|
|
.byte 12
|
|
.byte 16
|
|
.byte 20
|
|
.byte 24
|
|
.byte 28
|
|
.byte 32
|
|
.byte 36
|
|
.byte 40
|
|
.byte 44
|
|
.byte 48
|
|
.byte 52
|
|
.byte 56
|
|
.byte 60
|
|
.byte 64
|
|
.byte 68
|
|
.byte 72
|
|
.byte 76
|
|
.byte 80
|
|
.byte 84
|
|
.byte 88
|
|
.byte 92
|
|
.byte 96
|
|
.byte 100
|
|
.byte 104
|
|
.byte 108
|
|
.byte 112
|
|
.byte 116
|
|
.byte 120
|
|
.byte 124
|
|
.byte -128
|
|
/* 1/64 .. 1/127, normalized. There is an implicit leading 1 in bit 32. */
|
|
.balign 4
|
|
zero_l:
|
|
.long 0x0
|
|
.long 0xF81F81F9
|
|
.long 0xF07C1F08
|
|
.long 0xE9131AC0
|
|
.long 0xE1E1E1E2
|
|
.long 0xDAE6076C
|
|
.long 0xD41D41D5
|
|
.long 0xCD856891
|
|
.long 0xC71C71C8
|
|
.long 0xC0E07039
|
|
.long 0xBACF914D
|
|
.long 0xB4E81B4F
|
|
.long 0xAF286BCB
|
|
.long 0xA98EF607
|
|
.long 0xA41A41A5
|
|
.long 0x9EC8E952
|
|
.long 0x9999999A
|
|
.long 0x948B0FCE
|
|
.long 0x8F9C18FA
|
|
.long 0x8ACB90F7
|
|
.long 0x86186187
|
|
.long 0x81818182
|
|
.long 0x7D05F418
|
|
.long 0x78A4C818
|
|
.long 0x745D1746
|
|
.long 0x702E05C1
|
|
.long 0x6C16C16D
|
|
.long 0x68168169
|
|
.long 0x642C8591
|
|
.long 0x60581606
|
|
.long 0x5C9882BA
|
|
.long 0x58ED2309
|
|
div_table_inv:
|
|
.long 0x55555556
|
|
.long 0x51D07EAF
|
|
.long 0x4E5E0A73
|
|
.long 0x4AFD6A06
|
|
.long 0x47AE147B
|
|
.long 0x446F8657
|
|
.long 0x41414142
|
|
.long 0x3E22CBCF
|
|
.long 0x3B13B13C
|
|
.long 0x38138139
|
|
.long 0x3521CFB3
|
|
.long 0x323E34A3
|
|
.long 0x2F684BDB
|
|
.long 0x2C9FB4D9
|
|
.long 0x29E4129F
|
|
.long 0x27350B89
|
|
.long 0x24924925
|
|
.long 0x21FB7813
|
|
.long 0x1F7047DD
|
|
.long 0x1CF06ADB
|
|
.long 0x1A7B9612
|
|
.long 0x18118119
|
|
.long 0x15B1E5F8
|
|
.long 0x135C8114
|
|
.long 0x11111112
|
|
.long 0xECF56BF
|
|
.long 0xC9714FC
|
|
.long 0xA6810A7
|
|
.long 0x8421085
|
|
.long 0x624DD30
|
|
.long 0x4104105
|
|
.long 0x2040811
|
|
/* maximum error: 0.987342 scaled: 0.921875*/
|