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cogl: Make various functions non-optional

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Remove fallback implementations of some functions available in
gcc/clang and Linux/BSDs.
This commit is contained in:
Jonas Ådahl 2018-05-03 20:34:51 +02:00
parent 9846a4d812
commit 46942c24a3
3 changed files with 0 additions and 158 deletions
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6
cogl/cogl-mutter-config.h.in
View File

@ -6,9 +6,3 @@
/* Have GLES 2.0 for rendering */
#undef HAVE_COGL_GLES2
/* Define to 1 if you have the `ffs' function. */
#undef HAVE_FFS
/* Define to 1 if you have the `memmem' function. */
#undef HAVE_MEMMEM

86
cogl/cogl/cogl-util.c
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@ -67,70 +67,6 @@ _cogl_util_one_at_a_time_mix (unsigned int hash)
return hash;
}
/* The 'ffs' function is part of C99 so it isn't always available */
#ifndef HAVE_FFS
int
_cogl_util_ffs (int num)
{
int i = 1;
if (num == 0)
return 0;
while ((num & 1) == 0)
{
num >>= 1;
i++;
}
return i;
}
#endif /* HAVE_FFS */
/* The 'ffsl' is non-standard but when building with GCC we'll use its
builtin instead */
#ifndef COGL_UTIL_HAVE_BUILTIN_FFSL
int
_cogl_util_ffsl_wrapper (long int num)
{
int i = 1;
if (num == 0)
return 0;
while ((num & 1) == 0)
{
num >>= 1;
i++;
}
return i;
}
#endif /* COGL_UTIL_HAVE_BUILTIN_FFSL */
#ifndef COGL_UTIL_HAVE_BUILTIN_POPCOUNTL
const unsigned char
_cogl_util_popcount_table[256] =
{
0, 1, 1, 2, 1, 2, 2, 3, 1, 2, 2, 3, 2, 3, 3, 4, 1, 2, 2, 3, 2, 3, 3, 4,
2, 3, 3, 4, 3, 4, 4, 5, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 1, 2, 2, 3, 2, 3, 3, 4,
2, 3, 3, 4, 3, 4, 4, 5, 2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6,
4, 5, 5, 6, 5, 6, 6, 7, 1, 2, 2, 3, 2, 3, 3, 4, 2, 3, 3, 4, 3, 4, 4, 5,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 2, 3, 3, 4, 3, 4, 4, 5,
3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
2, 3, 3, 4, 3, 4, 4, 5, 3, 4, 4, 5, 4, 5, 5, 6, 3, 4, 4, 5, 4, 5, 5, 6,
4, 5, 5, 6, 5, 6, 6, 7, 3, 4, 4, 5, 4, 5, 5, 6, 4, 5, 5, 6, 5, 6, 6, 7,
4, 5, 5, 6, 5, 6, 6, 7, 5, 6, 6, 7, 6, 7, 7, 8
};
#endif /* COGL_UTIL_HAVE_BUILTIN_POPCOUNTL */
/* tests/conform/test-bitmask.c tests some cogl internals and includes this
* file directly but since these functions depend on other internal Cogl
* symbols we hide them from test-bitmask.c
@ -261,26 +197,4 @@ _cogl_util_pixel_format_from_masks (unsigned long r_mask,
return image_format;
}
#ifndef HAVE_MEMMEM
char *
_cogl_util_memmem (const void *haystack,
size_t haystack_len,
const void *needle,
size_t needle_len)
{
size_t i;
if (needle_len > haystack_len)
return NULL;
for (i = 0; i <= haystack_len - needle_len; i++)
if (!memcmp ((const char *) haystack + i, needle, needle_len))
return (char *) haystack + i;
return NULL;
}
#endif /* HAVE_MEMMEM */
#endif /* _COGL_IN_TEST_BITMASK */

66
cogl/cogl/cogl-util.h
View File

@ -114,75 +114,17 @@ _cogl_util_one_at_a_time_hash (unsigned int hash,
unsigned int
_cogl_util_one_at_a_time_mix (unsigned int hash);
/* These two builtins are available since GCC 3.4 */
#if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 4)
#define COGL_UTIL_HAVE_BUILTIN_FFSL
#define COGL_UTIL_HAVE_BUILTIN_POPCOUNTL
#define COGL_UTIL_HAVE_BUILTIN_CLZ
#endif
/* The 'ffs' function is part of C99 so it isn't always available */
#ifdef HAVE_FFS
#define _cogl_util_ffs ffs
#else
int
_cogl_util_ffs (int num);
#endif
/* The 'ffsl' function is non-standard but GCC has a builtin for it
since 3.4 which we can use */
#ifdef COGL_UTIL_HAVE_BUILTIN_FFSL
#define _cogl_util_ffsl __builtin_ffsl
#else
/* If ints and longs are the same size we can just use ffs. Hopefully
the compiler will optimise away this conditional */
#define _cogl_util_ffsl(x) \
(sizeof (long int) == sizeof (int) ? _cogl_util_ffs ((int) x) : \
_cogl_util_ffsl_wrapper (x))
int
_cogl_util_ffsl_wrapper (long int num);
#endif /* COGL_UTIL_HAVE_BUILTIN_FFSL */
static inline unsigned int
_cogl_util_fls (unsigned int n)
{
#ifdef COGL_UTIL_HAVE_BUILTIN_CLZ
return n == 0 ? 0 : sizeof (unsigned int) * 8 - __builtin_clz (n);
#else
unsigned int v = 1;
if (n == 0)
return 0;
while (n >>= 1)
v++;
return v;
#endif
}
#ifdef COGL_UTIL_HAVE_BUILTIN_POPCOUNTL
#define _cogl_util_popcountl __builtin_popcountl
#else
extern const unsigned char _cogl_util_popcount_table[256];
/* There are many ways of doing popcount but doing a table lookup
seems to be the most robust against different sizes for long. Some
pages seem to claim it's the fastest method anyway. */
static inline int
_cogl_util_popcountl (unsigned long num)
{
int i;
int sum = 0;
/* Let's hope GCC will unroll this loop.. */
for (i = 0; i < sizeof (num); i++)
sum += _cogl_util_popcount_table[(num >> (i * 8)) & 0xff];
return sum;
}
#endif /* COGL_UTIL_HAVE_BUILTIN_POPCOUNTL */
#define _COGL_RETURN_IF_FAIL(EXPR) g_return_if_fail(EXPR)
#define _COGL_RETURN_VAL_IF_FAIL(EXPR, VAL) g_return_val_if_fail(EXPR, VAL)
@ -222,15 +164,7 @@ _cogl_util_pixel_format_from_masks (unsigned long r_mask,
#define _COGL_STATIC_ASSERT(EXPRESSION, MESSAGE) \
_Static_assert (EXPRESSION, MESSAGE);
#ifdef HAVE_MEMMEM
#define _cogl_util_memmem memmem
#else
char *
_cogl_util_memmem (const void *haystack,
size_t haystack_len,
const void *needle,
size_t needle_len);
#endif
static inline void
_cogl_util_scissor_intersect (int rect_x0,