On Mon, Jun 22, 2015 at 4:02 PM, Nanley Chery <nanleych...@gmail.com> wrote:
> From: Nanley Chery <nanley.g.ch...@intel.com>
>
> ALIGN and ROUND_DOWN_TO both require that the alignment value passed
> into the macro be a power of two in the comments. Using software assertions
> verifies this to be the case.
>
> v2: use static inline functions instead of gcc-specific statement expressions.
>
> Signed-off-by: Nanley Chery <nanley.g.ch...@intel.com>
> ---
> src/mesa/drivers/dri/i965/brw_fs_nir.cpp | 2 +-
> src/mesa/main/macros.h | 16 +++++++++++++---
> 2 files changed, 14 insertions(+), 4 deletions(-)
>
> diff --git a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> index 59081ea..1a57784 100644
> --- a/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> +++ b/src/mesa/drivers/dri/i965/brw_fs_nir.cpp
> @@ -134,7 +134,7 @@ fs_visitor::nir_setup_outputs(nir_shader *shader)
> : var->type->vector_elements;
>
> if (stage == MESA_SHADER_VERTEX) {
> - for (int i = 0; i < ALIGN(type_size(var->type), 4) / 4; i++) {
> + for (unsigned int i = 0; i < ALIGN(type_size(var->type), 4) / 4;
> i++) {
> int output = var->data.location + i;
> this->outputs[output] = offset(reg, 4 * i);
> this->output_components[output] = vector_elements;
> diff --git a/src/mesa/main/macros.h b/src/mesa/main/macros.h
> index 0608650..4a640ad 100644
> --- a/src/mesa/main/macros.h
> +++ b/src/mesa/main/macros.h
> @@ -684,7 +684,7 @@ minify(unsigned value, unsigned levels)
> * Note that this considers 0 a power of two.
> */
> static inline bool
> -is_power_of_two(unsigned value)
> +is_power_of_two(uintptr_t value)
> {
> return (value & (value - 1)) == 0;
> }
> @@ -700,7 +700,12 @@ is_power_of_two(unsigned value)
> *
> * \sa ROUND_DOWN_TO()
> */
> -#define ALIGN(value, alignment) (((value) + (alignment) - 1) &
> ~((alignment) - 1))
> +static inline uintptr_t
> +ALIGN(uintptr_t value, uintptr_t alignment)
> +{
> + assert(is_power_of_two(alignment));
Also handle the 0 alignment. is_power_of_two() returns true for 0.
Use assert(alignment > 0 && is_power_of_two(alignment))?
> + return (((value) + (alignment) - 1) & ~((alignment) - 1));
> +}
>
> /**
> * Align a value down to an alignment value
> @@ -713,7 +718,12 @@ is_power_of_two(unsigned value)
> *
> * \sa ALIGN()
> */
> -#define ROUND_DOWN_TO(value, alignment) ((value) & ~(alignment - 1))
> +static inline uintptr_t
> +ROUND_DOWN_TO(uintptr_t value, uintptr_t alignment)
> +{
> + assert(is_power_of_two(alignment));
Here as well.
> + return ((value) & ~(alignment - 1));
> +}
>
>
> /** Cross product of two 3-element vectors */
> --
> 2.4.2
>
> _______________________________________________
> mesa-dev mailing list
> mesa-dev@lists.freedesktop.org
> http://lists.freedesktop.org/mailman/listinfo/mesa-dev
With above changes and indentation fixes:
Reviewed-by: Anuj Phogat <anuj.pho...@gmail.com>
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