| /* 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*/ |
