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/* d-port.cc -- D frontend interface to the gcc back-end.
Copyright (C) 2013-2022 Free Software Foundation, Inc.
GCC 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.
GCC 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 GCC; see the file COPYING3. If not see
<http://www.gnu.org/licenses/>. */
#include "config.h"
#include "system.h"
#include "coretypes.h"
#include "dmd/root/port.h"
#include "dmd/target.h"
#include "tree.h"
/* Implements the Port interface defined by the frontend.
A mini library for doing compiler/system specific things. */
/* Compare the first N bytes of S1 and S2 without regard to the case. */
int
Port::memicmp (const char *s1, const char *s2, size_t n)
{
int result = 0;
for (size_t i = 0; i < n; i++)
{
char c1 = s1[i];
char c2 = s2[i];
result = c1 - c2;
if (result)
{
result = TOUPPER (c1) - TOUPPER (c2);
if (result)
break;
}
}
return result;
}
/* Convert all characters in S to uppercase. */
char *
Port::strupr (char *s)
{
char *t = s;
while (*s)
{
*s = TOUPPER (*s);
s++;
}
return t;
}
/* Return true if the real_t value from string BUFFER overflows
as a result of rounding down to float mode. */
bool
Port::isFloat32LiteralOutOfRange (const char *buffer)
{
real_t r;
real_from_string3 (&r.rv (), buffer, TYPE_MODE (float_type_node));
return r == target.RealProperties.infinity;
}
/* Return true if the real_t value from string BUFFER overflows
as a result of rounding down to double mode. */
bool
Port::isFloat64LiteralOutOfRange (const char *buffer)
{
real_t r;
real_from_string3 (&r.rv (), buffer, TYPE_MODE (double_type_node));
return r == target.RealProperties.infinity;
}
/* Fetch a little-endian 16-bit value from BUFFER. */
unsigned
Port::readwordLE (const void *buffer)
{
const unsigned char *p = (const unsigned char *) buffer;
return ((unsigned) p[1] << 8) | (unsigned) p[0];
}
/* Fetch a big-endian 16-bit value from BUFFER. */
unsigned
Port::readwordBE (const void *buffer)
{
const unsigned char *p = (const unsigned char *) buffer;
return ((unsigned) p[0] << 8) | (unsigned) p[1];
}
/* Fetch a little-endian 32-bit value from BUFFER. */
unsigned
Port::readlongLE (const void *buffer)
{
const unsigned char *p = (const unsigned char *) buffer;
return (((unsigned) p[3] << 24)
| ((unsigned) p[2] << 16)
| ((unsigned) p[1] << 8)
| (unsigned) p[0]);
}
/* Fetch a big-endian 32-bit value from BUFFER. */
unsigned
Port::readlongBE (const void *buffer)
{
const unsigned char *p = (const unsigned char *) buffer;
return (((unsigned) p[0] << 24)
| ((unsigned) p[1] << 16)
| ((unsigned) p[2] << 8)
| (unsigned) p[3]);
}
/* Write an SZ-byte sized VALUE to BUFFER, ignoring endian-ness. */
void
Port::valcpy (void *buffer, uint64_t value, size_t sz)
{
gcc_assert (((size_t) buffer) % sz == 0);
switch (sz)
{
case 1:
*(uint8_t *) buffer = (uint8_t) value;
break;
case 2:
*(uint16_t *) buffer = (uint16_t) value;
break;
case 4:
*(uint32_t *) buffer = (uint32_t) value;
break;
case 8:
*(uint64_t *) buffer = (uint64_t) value;
break;
default:
gcc_unreachable ();
}
}
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