gcc/libgcc/config/epiphany/modsi3.c

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config.gcc (epiphany-*-*): New architecture. gcc: * config.gcc (epiphany-*-*): New architecture. (epiphany-*-elf): New configuration. * config/epiphany, common/config/epiphany : New directories. * doc/extend.texi (disinterrupt attribute): Add Epiphany. (interrupt attribute): Add Epiphany. (long_call, short_call attribute): Add Epiphany. * doc/invoke.texi (Options): Add Epiphany options. * doc/md.texi (Machine Constraints): Add Epiphany constraints. * doc/install.texi (Options specification): Add --with-stack-offset=@var{num} description. (host/target specific issues): Add epiphany-*-elf. * doc/contrib.texi (Contributors): Mention Epiphany port. gcc/testsuite: * gcc.c-torture/execute/ieee/mul-subnormal-single-1.x: Disable test on Epiphany. * gcc.c-torture/execute/20101011-1.c: Disable test on Epiphany. * gcc.dg/stack-usage-1.c [__epiphany__] (SIZE): Define. * gcc.dg/pragma-pack-3.c: Disable test on Epiphany. * g++.dg/parse/pragma3.C: Likewise. * stackalign/builtin-apply-2.c (STACK_ARGUMENTS_SIZE): Define. (bar): Use it. * gcc.dg/weak/typeof-2.c [epiphany-*-*]: Add option -mshort-calls. * gcc.dg/tls/thr-cse-1.c: Likewise. * g++.dg/opt/devirt2.C: Likewise. * gcc.dg/20020312-2.c [epiphany-*-*] (PIC_REG): Define. * gcc.dg/builtin-apply2.c [__epiphany__]: (STACK_ARGUMENTS_SIZE): 20. * gcc.target/epiphany: New directory. libgcc: * config.host (epiphany-*-elf*): New configuration. * config/epiphany: New Directory. contrib: * contrib-list.mk: Add Epiphany configurations. From-SVN: r181016
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/* Generic signed 32 bit modulo implementation.
2022-01-03 10:42:10 +01:00
Copyright (C) 2009-2022 Free Software Foundation, Inc.
config.gcc (epiphany-*-*): New architecture. gcc: * config.gcc (epiphany-*-*): New architecture. (epiphany-*-elf): New configuration. * config/epiphany, common/config/epiphany : New directories. * doc/extend.texi (disinterrupt attribute): Add Epiphany. (interrupt attribute): Add Epiphany. (long_call, short_call attribute): Add Epiphany. * doc/invoke.texi (Options): Add Epiphany options. * doc/md.texi (Machine Constraints): Add Epiphany constraints. * doc/install.texi (Options specification): Add --with-stack-offset=@var{num} description. (host/target specific issues): Add epiphany-*-elf. * doc/contrib.texi (Contributors): Mention Epiphany port. gcc/testsuite: * gcc.c-torture/execute/ieee/mul-subnormal-single-1.x: Disable test on Epiphany. * gcc.c-torture/execute/20101011-1.c: Disable test on Epiphany. * gcc.dg/stack-usage-1.c [__epiphany__] (SIZE): Define. * gcc.dg/pragma-pack-3.c: Disable test on Epiphany. * g++.dg/parse/pragma3.C: Likewise. * stackalign/builtin-apply-2.c (STACK_ARGUMENTS_SIZE): Define. (bar): Use it. * gcc.dg/weak/typeof-2.c [epiphany-*-*]: Add option -mshort-calls. * gcc.dg/tls/thr-cse-1.c: Likewise. * g++.dg/opt/devirt2.C: Likewise. * gcc.dg/20020312-2.c [epiphany-*-*] (PIC_REG): Define. * gcc.dg/builtin-apply2.c [__epiphany__]: (STACK_ARGUMENTS_SIZE): 20. * gcc.target/epiphany: New directory. libgcc: * config.host (epiphany-*-elf*): New configuration. * config/epiphany: New Directory. contrib: * contrib-list.mk: Add Epiphany configurations. From-SVN: r181016
2011-11-05 21:48:23 +01:00
Contributed by Embecosm on behalf of Adapteva, Inc.
This file is part of GCC.
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 3, or (at your option) any
later version.
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.
Under Section 7 of GPL version 3, you are granted additional
permissions described in the GCC Runtime Library Exception, version
3.1, as published by the Free Software Foundation.
You should have received a copy of the GNU General Public License and
a copy of the GCC Runtime Library Exception along with this program;
see the files COPYING3 and COPYING.RUNTIME respectively. If not, see
<http://www.gnu.org/licenses/>. */
typedef union { unsigned int i; float f; } fu;
unsigned int __modsi3 (unsigned int a, unsigned int b);
unsigned int
__modsi3 (unsigned int a, unsigned int b)
{
unsigned int sign = (int) a >> 31;
unsigned int d, t, s0, s1, s2, r0, r1;
fu u0, u1, u2, u1b, u2b;
a = abs (a);
b = abs (b);
if (b > a)
goto ret_a;
/* Compute difference in number of bits in S0. */
u0.i = 0x40000000;
u1b.i = u2b.i = u0.i;
u1.i = a;
u2.i = b;
u1.i = a | u0.i;
t = 0x4b800000 | ((a >> 23) & 0xffff);
if (a >> 23)
{
u1.i = t;
u1b.i = 0x4b800000;
}
u2.i = b | u0.i;
t = 0x4b800000 | ((b >> 23) & 0xffff);
if (b >> 23)
{
u2.i = t;
u2b.i = 0x4b800000;
}
u1.f = u1.f - u1b.f;
u2.f = u2.f - u2b.f;
s1 = u1.i >> 23;
s2 = u2.i >> 23;
s0 = s1 - s2;
#define STEP(n) case n: d = b << n; t = a - d; if (t <= a) a = t;
switch (s0)
{
STEP (31)
STEP (30)
STEP (29)
STEP (28)
STEP (27)
STEP (26)
STEP (25)
STEP (24)
STEP (23)
STEP (22)
STEP (21)
STEP (20)
STEP (19)
STEP (18)
STEP (17)
STEP (16)
STEP (15)
STEP (14)
STEP (13)
STEP (12)
STEP (11)
STEP (10)
STEP (9)
STEP (8)
STEP (7)
STEP (6)
STEP (5)
STEP (4)
STEP (3)
STEP (2)
STEP (1)
STEP (0)
}
ret_a:
return (a ^ sign) - sign;
}