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authorChris Wilson <chris@chris-wilson.co.uk>2011-02-08 22:58:35 +0000
committerChris Wilson <chris@chris-wilson.co.uk>2011-02-21 12:59:37 +0000
commit41260a9bf63aa61f88f188053f1ed4dba3a852d2 (patch)
tree59aef62f5130eff6daf83ba75550af7bb78c7289 /src/mesa/main
parent8ea6e98c7be6483514769b03ffa6c6f4f7b2e0be (diff)
i965: Use compiler builtins when available
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'src/mesa/main')
-rw-r--r--src/mesa/main/imports.c13
-rw-r--r--src/mesa/main/imports.h13
2 files changed, 17 insertions, 9 deletions
diff --git a/src/mesa/main/imports.c b/src/mesa/main/imports.c
index fef46c4bbf..bf89815f2d 100644
--- a/src/mesa/main/imports.c
+++ b/src/mesa/main/imports.c
@@ -453,6 +453,7 @@ _mesa_inv_sqrtf(float n)
#endif
}
+#ifndef __GNUC__
/**
* Find the first bit set in a word.
*/
@@ -496,9 +497,6 @@ _mesa_ffs(int32_t i)
int
_mesa_ffsll(int64_t val)
{
-#ifdef ffsll
- return ffsll(val);
-#else
int bit;
assert(sizeof(val) == 8);
@@ -512,27 +510,24 @@ _mesa_ffsll(int64_t val)
return 32 + bit;
return 0;
-#endif
}
+#if ((_GNUC__ == 3 && __GNUC_MINOR__ < 4) || __GNUC__ < 4)
/**
* Return number of bits set in given GLuint.
*/
unsigned int
_mesa_bitcount(unsigned int n)
{
-#if defined(__GNUC__) && \
- ((_GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
- return __builtin_popcount(n);
-#else
unsigned int bits;
for (bits = 0; n > 0; n = n >> 1) {
bits += (n & 1);
}
return bits;
-#endif
}
+#endif
+#endif
/**
diff --git a/src/mesa/main/imports.h b/src/mesa/main/imports.h
index 5ea647ad8d..a994dbcae8 100644
--- a/src/mesa/main/imports.h
+++ b/src/mesa/main/imports.h
@@ -539,6 +539,18 @@ _mesa_inv_sqrtf(float x);
extern void
_mesa_init_sqrt_table(void);
+#ifdef __GNUC__
+#define _mesa_ffs(i) ffs(i)
+#define _mesa_ffsll(i) ffsll(i)
+
+#if ((_GNUC__ == 3 && __GNUC_MINOR__ >= 4) || __GNUC__ >= 4)
+#define _mesa_bitcount(i) __builtin_popcount(i)
+#else
+extern unsigned int
+_mesa_bitcount(unsigned int n);
+#endif
+
+#else
extern int
_mesa_ffs(int32_t i);
@@ -547,6 +559,7 @@ _mesa_ffsll(int64_t i);
extern unsigned int
_mesa_bitcount(unsigned int n);
+#endif
extern GLhalfARB
_mesa_float_to_half(float f);