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Annotate int2float() as being a pure function.

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This allows gcc to fold duplicate calls into a single call.  Since
the current users do actually call it multiple times with the
same arguments, this is an obvious win.

Signed-off-by: Steven Fuerst <svfuerst@gmail.com>
This commit is contained in:
Steven Fuerst 2012-08-15 15:07:16 -07:00 committed by Alex Deucher
parent 747f49ba67
commit 9e9eb7c60d
2 changed files with 2 additions and 2 deletions
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2
drivers/gpu/drm/radeon/r600_blit.c
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@ -499,7 +499,7 @@ set_default_state(drm_radeon_private_t *dev_priv)
* as the fractional bits will not fit in a float. (It would be better to * as the fractional bits will not fit in a float. (It would be better to
* round towards even as the fpu does, but that is slower.) * round towards even as the fpu does, but that is slower.)
*/ */
uint32_t int2float(uint32_t x) __pure uint32_t int2float(uint32_t x)
{ {
uint32_t msb, exponent, fraction; uint32_t msb, exponent, fraction;

2
drivers/gpu/drm/radeon/r600_blit_shaders.h
View File

@ -35,5 +35,5 @@ extern const u32 r6xx_default_state[];
extern const u32 r6xx_ps_size, r6xx_vs_size; extern const u32 r6xx_ps_size, r6xx_vs_size;
extern const u32 r6xx_default_size, r7xx_default_size; extern const u32 r6xx_default_size, r7xx_default_size;
uint32_t int2float(uint32_t x); __pure uint32_t int2float(uint32_t x);
#endif #endif