666 lines
10 KiB
ArmAsm
666 lines
10 KiB
ArmAsm
/* Copyright (C) 1994, 1995, 1997, 1998, 1999, 2000, 2001, 2002, 2003,
|
|
2004, 2005, 2006
|
|
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
|
|
Free Software Foundation; either version 2, or (at your option) any
|
|
later version.
|
|
|
|
In addition to the permissions in the GNU General Public License, the
|
|
Free Software Foundation gives you unlimited permission to link the
|
|
compiled version of this file into combinations with other programs,
|
|
and to distribute those combinations without any restriction coming
|
|
from the use of this file. (The General Public License restrictions
|
|
do apply in other respects; for example, they cover modification of
|
|
the file, and distribution when not linked into a combine
|
|
executable.)
|
|
|
|
This file is distributed in the hope that it will be useful, but
|
|
WITHOUT ANY WARRANTY; without even the implied warranty of
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|
General Public License for more details.
|
|
|
|
You should have received a copy of the GNU General Public License
|
|
along with this program; see the file COPYING. If not, write to
|
|
the Free Software Foundation, 51 Franklin Street, Fifth Floor,
|
|
Boston, MA 02110-1301, USA. */
|
|
|
|
!! libgcc routines for the Renesas / SuperH SH CPUs.
|
|
!! Contributed by Steve Chamberlain.
|
|
!! sac@cygnus.com
|
|
|
|
!! ashiftrt_r4_x, ___ashrsi3, ___ashlsi3, ___lshrsi3 routines
|
|
!! recoded in assembly by Toshiyasu Morita
|
|
!! tm@netcom.com
|
|
|
|
/* SH2 optimizations for ___ashrsi3, ___ashlsi3, ___lshrsi3 and
|
|
ELF local label prefixes by J"orn Rennecke
|
|
amylaar@cygnus.com */
|
|
|
|
/* This code used shld, thus is not suitable for SH1 / SH2. */
|
|
|
|
/* Signed / unsigned division without use of FPU, optimized for SH4.
|
|
Uses a lookup table for divisors in the range -128 .. +128, and
|
|
div1 with case distinction for larger divisors in three more ranges.
|
|
The code is lumped together with the table to allow the use of mova. */
|
|
#ifdef CONFIG_CPU_LITTLE_ENDIAN
|
|
#define L_LSB 0
|
|
#define L_LSWMSB 1
|
|
#define L_MSWLSB 2
|
|
#else
|
|
#define L_LSB 3
|
|
#define L_LSWMSB 2
|
|
#define L_MSWLSB 1
|
|
#endif
|
|
|
|
.balign 4
|
|
.global __udivsi3_i4i
|
|
.global __udivsi3_i4
|
|
.set __udivsi3_i4, __udivsi3_i4i
|
|
.type __udivsi3_i4i, @function
|
|
__udivsi3_i4i:
|
|
mov.w c128_w, r1
|
|
div0u
|
|
mov r4,r0
|
|
shlr8 r0
|
|
cmp/hi r1,r5
|
|
extu.w r5,r1
|
|
bf udiv_le128
|
|
cmp/eq r5,r1
|
|
bf udiv_ge64k
|
|
shlr r0
|
|
mov r5,r1
|
|
shll16 r5
|
|
mov.l r4,@-r15
|
|
div1 r5,r0
|
|
mov.l r1,@-r15
|
|
div1 r5,r0
|
|
div1 r5,r0
|
|
bra udiv_25
|
|
div1 r5,r0
|
|
|
|
div_le128:
|
|
mova div_table_ix,r0
|
|
bra div_le128_2
|
|
mov.b @(r0,r5),r1
|
|
udiv_le128:
|
|
mov.l r4,@-r15
|
|
mova div_table_ix,r0
|
|
mov.b @(r0,r5),r1
|
|
mov.l r5,@-r15
|
|
div_le128_2:
|
|
mova div_table_inv,r0
|
|
mov.l @(r0,r1),r1
|
|
mov r5,r0
|
|
tst #0xfe,r0
|
|
mova div_table_clz,r0
|
|
dmulu.l r1,r4
|
|
mov.b @(r0,r5),r1
|
|
bt/s div_by_1
|
|
mov r4,r0
|
|
mov.l @r15+,r5
|
|
sts mach,r0
|
|
/* clrt */
|
|
addc r4,r0
|
|
mov.l @r15+,r4
|
|
rotcr r0
|
|
rts
|
|
shld r1,r0
|
|
|
|
div_by_1_neg:
|
|
neg r4,r0
|
|
div_by_1:
|
|
mov.l @r15+,r5
|
|
rts
|
|
mov.l @r15+,r4
|
|
|
|
div_ge64k:
|
|
bt/s div_r8
|
|
div0u
|
|
shll8 r5
|
|
bra div_ge64k_2
|
|
div1 r5,r0
|
|
udiv_ge64k:
|
|
cmp/hi r0,r5
|
|
mov r5,r1
|
|
bt udiv_r8
|
|
shll8 r5
|
|
mov.l r4,@-r15
|
|
div1 r5,r0
|
|
mov.l r1,@-r15
|
|
div_ge64k_2:
|
|
div1 r5,r0
|
|
mov.l zero_l,r1
|
|
.rept 4
|
|
div1 r5,r0
|
|
.endr
|
|
mov.l r1,@-r15
|
|
div1 r5,r0
|
|
mov.w m256_w,r1
|
|
div1 r5,r0
|
|
mov.b r0,@(L_LSWMSB,r15)
|
|
xor r4,r0
|
|
and r1,r0
|
|
bra div_ge64k_end
|
|
xor r4,r0
|
|
|
|
div_r8:
|
|
shll16 r4
|
|
bra div_r8_2
|
|
shll8 r4
|
|
udiv_r8:
|
|
mov.l r4,@-r15
|
|
shll16 r4
|
|
clrt
|
|
shll8 r4
|
|
mov.l r5,@-r15
|
|
div_r8_2:
|
|
rotcl r4
|
|
mov r0,r1
|
|
div1 r5,r1
|
|
mov r4,r0
|
|
rotcl r0
|
|
mov r5,r4
|
|
div1 r5,r1
|
|
.rept 5
|
|
rotcl r0; div1 r5,r1
|
|
.endr
|
|
rotcl r0
|
|
mov.l @r15+,r5
|
|
div1 r4,r1
|
|
mov.l @r15+,r4
|
|
rts
|
|
rotcl r0
|
|
|
|
.global __sdivsi3_i4i
|
|
.global __sdivsi3_i4
|
|
.global __sdivsi3
|
|
.set __sdivsi3_i4, __sdivsi3_i4i
|
|
.set __sdivsi3, __sdivsi3_i4i
|
|
.type __sdivsi3_i4i, @function
|
|
/* This is link-compatible with a __sdivsi3 call,
|
|
but we effectively clobber only r1. */
|
|
__sdivsi3_i4i:
|
|
mov.l r4,@-r15
|
|
cmp/pz r5
|
|
mov.w c128_w, r1
|
|
bt/s pos_divisor
|
|
cmp/pz r4
|
|
mov.l r5,@-r15
|
|
neg r5,r5
|
|
bt/s neg_result
|
|
cmp/hi r1,r5
|
|
neg r4,r4
|
|
pos_result:
|
|
extu.w r5,r0
|
|
bf div_le128
|
|
cmp/eq r5,r0
|
|
mov r4,r0
|
|
shlr8 r0
|
|
bf/s div_ge64k
|
|
cmp/hi r0,r5
|
|
div0u
|
|
shll16 r5
|
|
div1 r5,r0
|
|
div1 r5,r0
|
|
div1 r5,r0
|
|
udiv_25:
|
|
mov.l zero_l,r1
|
|
div1 r5,r0
|
|
div1 r5,r0
|
|
mov.l r1,@-r15
|
|
.rept 3
|
|
div1 r5,r0
|
|
.endr
|
|
mov.b r0,@(L_MSWLSB,r15)
|
|
xtrct r4,r0
|
|
swap.w r0,r0
|
|
.rept 8
|
|
div1 r5,r0
|
|
.endr
|
|
mov.b r0,@(L_LSWMSB,r15)
|
|
div_ge64k_end:
|
|
.rept 8
|
|
div1 r5,r0
|
|
.endr
|
|
mov.l @r15+,r4 ! zero-extension and swap using LS unit.
|
|
extu.b r0,r0
|
|
mov.l @r15+,r5
|
|
or r4,r0
|
|
mov.l @r15+,r4
|
|
rts
|
|
rotcl r0
|
|
|
|
div_le128_neg:
|
|
tst #0xfe,r0
|
|
mova div_table_ix,r0
|
|
mov.b @(r0,r5),r1
|
|
mova div_table_inv,r0
|
|
bt/s div_by_1_neg
|
|
mov.l @(r0,r1),r1
|
|
mova div_table_clz,r0
|
|
dmulu.l r1,r4
|
|
mov.b @(r0,r5),r1
|
|
mov.l @r15+,r5
|
|
sts mach,r0
|
|
/* clrt */
|
|
addc r4,r0
|
|
mov.l @r15+,r4
|
|
rotcr r0
|
|
shld r1,r0
|
|
rts
|
|
neg r0,r0
|
|
|
|
pos_divisor:
|
|
mov.l r5,@-r15
|
|
bt/s pos_result
|
|
cmp/hi r1,r5
|
|
neg r4,r4
|
|
neg_result:
|
|
extu.w r5,r0
|
|
bf div_le128_neg
|
|
cmp/eq r5,r0
|
|
mov r4,r0
|
|
shlr8 r0
|
|
bf/s div_ge64k_neg
|
|
cmp/hi r0,r5
|
|
div0u
|
|
mov.l zero_l,r1
|
|
shll16 r5
|
|
div1 r5,r0
|
|
mov.l r1,@-r15
|
|
.rept 7
|
|
div1 r5,r0
|
|
.endr
|
|
mov.b r0,@(L_MSWLSB,r15)
|
|
xtrct r4,r0
|
|
swap.w r0,r0
|
|
.rept 8
|
|
div1 r5,r0
|
|
.endr
|
|
mov.b r0,@(L_LSWMSB,r15)
|
|
div_ge64k_neg_end:
|
|
.rept 8
|
|
div1 r5,r0
|
|
.endr
|
|
mov.l @r15+,r4 ! zero-extension and swap using LS unit.
|
|
extu.b r0,r1
|
|
mov.l @r15+,r5
|
|
or r4,r1
|
|
div_r8_neg_end:
|
|
mov.l @r15+,r4
|
|
rotcl r1
|
|
rts
|
|
neg r1,r0
|
|
|
|
div_ge64k_neg:
|
|
bt/s div_r8_neg
|
|
div0u
|
|
shll8 r5
|
|
mov.l zero_l,r1
|
|
.rept 6
|
|
div1 r5,r0
|
|
.endr
|
|
mov.l r1,@-r15
|
|
div1 r5,r0
|
|
mov.w m256_w,r1
|
|
div1 r5,r0
|
|
mov.b r0,@(L_LSWMSB,r15)
|
|
xor r4,r0
|
|
and r1,r0
|
|
bra div_ge64k_neg_end
|
|
xor r4,r0
|
|
|
|
c128_w:
|
|
.word 128
|
|
|
|
div_r8_neg:
|
|
clrt
|
|
shll16 r4
|
|
mov r4,r1
|
|
shll8 r1
|
|
mov r5,r4
|
|
.rept 7
|
|
rotcl r1; div1 r5,r0
|
|
.endr
|
|
mov.l @r15+,r5
|
|
rotcl r1
|
|
bra div_r8_neg_end
|
|
div1 r4,r0
|
|
|
|
m256_w:
|
|
.word 0xff00
|
|
/* This table has been generated by divtab-sh4.c. */
|
|
.balign 4
|
|
div_table_clz:
|
|
.byte 0
|
|
.byte 1
|
|
.byte 0
|
|
.byte -1
|
|
.byte -1
|
|
.byte -2
|
|
.byte -2
|
|
.byte -2
|
|
.byte -2
|
|
.byte -3
|
|
.byte -3
|
|
.byte -3
|
|
.byte -3
|
|
.byte -3
|
|
.byte -3
|
|
.byte -3
|
|
.byte -3
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -4
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -5
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
.byte -6
|
|
/* Lookup table translating positive divisor to index into table of
|
|
normalized inverse. N.B. the '0' entry is also the last entry of the
|
|
previous table, and causes an unaligned access for division by zero. */
|
|
div_table_ix:
|
|
.byte -6
|
|
.byte -128
|
|
.byte -128
|
|
.byte 0
|
|
.byte -128
|
|
.byte -64
|
|
.byte 0
|
|
.byte 64
|
|
.byte -128
|
|
.byte -96
|
|
.byte -64
|
|
.byte -32
|
|
.byte 0
|
|
.byte 32
|
|
.byte 64
|
|
.byte 96
|
|
.byte -128
|
|
.byte -112
|
|
.byte -96
|
|
.byte -80
|
|
.byte -64
|
|
.byte -48
|
|
.byte -32
|
|
.byte -16
|
|
.byte 0
|
|
.byte 16
|
|
.byte 32
|
|
.byte 48
|
|
.byte 64
|
|
.byte 80
|
|
.byte 96
|
|
.byte 112
|
|
.byte -128
|
|
.byte -120
|
|
.byte -112
|
|
.byte -104
|
|
.byte -96
|
|
.byte -88
|
|
.byte -80
|
|
.byte -72
|
|
.byte -64
|
|
.byte -56
|
|
.byte -48
|
|
.byte -40
|
|
.byte -32
|
|
.byte -24
|
|
.byte -16
|
|
.byte -8
|
|
.byte 0
|
|
.byte 8
|
|
.byte 16
|
|
.byte 24
|
|
.byte 32
|
|
.byte 40
|
|
.byte 48
|
|
.byte 56
|
|
.byte 64
|
|
.byte 72
|
|
.byte 80
|
|
.byte 88
|
|
.byte 96
|
|
.byte 104
|
|
.byte 112
|
|
.byte 120
|
|
.byte -128
|
|
.byte -124
|
|
.byte -120
|
|
.byte -116
|
|
.byte -112
|
|
.byte -108
|
|
.byte -104
|
|
.byte -100
|
|
.byte -96
|
|
.byte -92
|
|
.byte -88
|
|
.byte -84
|
|
.byte -80
|
|
.byte -76
|
|
.byte -72
|
|
.byte -68
|
|
.byte -64
|
|
.byte -60
|
|
.byte -56
|
|
.byte -52
|
|
.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*/
|