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pco: add helpers for overriding ref chans and offsetting vals

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Signed-off-by: Simon Perretta <simon.perretta@imgtec.com>
Acked-by: Frank Binns <frank.binns@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/32258>
This commit is contained in:
Simon Perretta 2024-11-05 14:22:45 +00:00 • committed by Marge Bot
parent 71480c075e
commit ce8392024d
1 changed files with 47 additions and 4 deletions
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51
src/imagination/pco/pco_internal.h
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@ -86,16 +86,23 @@ typedef struct _pco_func pco_func;
typedef struct _pco_block pco_block;
typedef struct _pco_instr pco_instr;
#define PCO_REF_VAL_BITS (32U)
#define PCO_REF_IDX_NUM_BITS (2U)
#define PCO_REF_IDX_OFFSET_BITS (8U)
#define PCO_REF_IDX_PAD_BITS \
(PCO_REF_VAL_BITS - (PCO_REF_IDX_NUM_BITS + PCO_REF_IDX_OFFSET_BITS))
/** PCO reference index. */
typedef struct PACKED _pco_ref {
/** Reference value. */
union PACKED {
unsigned val : 32;
unsigned val : PCO_REF_VAL_BITS;
struct PACKED {
unsigned num : 2; /** Index register number. */
unsigned offset : 8; /** Offset. */
unsigned _pad : 22;
unsigned num : PCO_REF_IDX_NUM_BITS; /** Index register number. */
unsigned offset : PCO_REF_IDX_OFFSET_BITS; /** Offset. */
unsigned _pad : PCO_REF_IDX_PAD_BITS;
} idx_reg;
};
@ -1817,6 +1824,42 @@ static inline pco_ref pco_ref_elem(pco_ref ref, enum pco_elem elem)
return ref;
}
/**
* \brief Updates a reference to set the number of channels.
*
* \param[in] ref Base reference.
* \param[in] chans New number of channels.
* \return Updated reference.
*/
static inline pco_ref pco_ref_chans(pco_ref ref, unsigned chans)
{
ref.chans = chans - 1;
return ref;
}
/**
* \brief Updates a reference value with the provided offset.
*
* \param[in] ref Base reference.
* \param[in] offset Offset to apply.
* \return Updated reference.
*/
static inline pco_ref pco_ref_offset(pco_ref ref, signed offset)
{
int64_t val = pco_ref_is_idx_reg(ref) ? ref.idx_reg.offset : ref.val;
val += offset;
if (pco_ref_is_idx_reg(ref)) {
assert(util_last_bit64(val) <= PCO_REF_IDX_OFFSET_BITS);
ref.idx_reg.offset = val;
} else {
assert(util_last_bit64(val) <= PCO_REF_VAL_BITS);
ref.val = val;
}
return ref;
}
/**
* \brief Checks whether two reference modifiers are the same.
*