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pco: Add pseudo instruction fencing for DITR and DITRP

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Signed-off-by: Caius Moldovan <caius.moldovan@imgtec.com>
Reviewed-by: Simon Perretta <simon.perretta@imgtec.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/40724>
This commit is contained in:
Caius-Moldovan-img 2026-03-12 13:40:22 +02:00 • committed by Marge Bot
parent 092106d742
commit 75dc7ef8fd
2 changed files with 43 additions and 6 deletions
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48
src/imagination/pco/pco_legalize.c
View file

@ -155,6 +155,29 @@ static inline bool xfer_op_mods(pco_instr *dest, pco_instr *src)
return all_xfered;
}
/**
* \brief Legalize fence pseudo instruction.
*
* \param[in,out] instr PCO instr.
* \return True if progress was made.
*/
static bool legalize_fence(pco_instr *instr)
{
if (instr->op != PCO_OP_FENCE)
return false;
pco_builder b =
pco_builder_create(instr->parent_func, pco_cursor_before_instr(instr));
pco_flush_p0(&b);
pco_br_next(&b, .exec_cnd = PCO_EXEC_CND_E1_Z1);
pco_br_next(&b, .exec_cnd = PCO_EXEC_CND_E1_Z0);
pco_instr_delete(instr);
return true;
}
static bool legalize_pseudo(pco_instr *instr)
{
switch (instr->op) {
@ -396,6 +419,12 @@ static bool try_legalize_large_hwreg_offsets(pco_instr *instr,
return true;
}
/**
* \brief Insert pseudo fences around DITR and DITRP instructions.
*
* \param[in,out] instr PCO instr.
* \return True if progress was made.
*/
static bool try_legalize_ditr_fence(pco_instr *instr)
{
if (instr->op != PCO_OP_DITR && instr->op != PCO_OP_DITRP)
@ -403,14 +432,10 @@ static bool try_legalize_ditr_fence(pco_instr *instr)
pco_builder b =
pco_builder_create(instr->parent_func, pco_cursor_before_instr(instr));
pco_flush_p0(&b);
pco_br_next(&b, .exec_cnd = PCO_EXEC_CND_E1_Z1);
pco_br_next(&b, .exec_cnd = PCO_EXEC_CND_E1_Z0);
pco_fence(&b);
b.cursor = pco_cursor_after_instr(instr);
pco_flush_p0(&b);
pco_br_next(&b, .exec_cnd = PCO_EXEC_CND_E1_Z1);
pco_br_next(&b, .exec_cnd = PCO_EXEC_CND_E1_Z0);
pco_fence(&b);
return true;
}
@ -457,6 +482,12 @@ bool pco_legalize(pco_shader *shader)
}
}
pco_foreach_func_in_shader (func, shader) {
pco_foreach_instr_in_func_safe (instr, func) {
progress |= legalize_fence(instr);
}
}
shader->is_legalized = true;
return progress;
}
@ -479,5 +510,10 @@ bool pco_post_ra_legalize(pco_shader *shader)
}
}
pco_foreach_func_in_shader (func, shader) {
pco_foreach_instr_in_func_safe (instr, func) {
progress |= legalize_fence(instr);
}
}
return progress;
}

1
src/imagination/pco/pco_ops.py
View file

@ -518,6 +518,7 @@ O_MOV = pseudo_op('mov', OM_ALU, 1, 1)
O_MOV_OFFSET = pseudo_op('mov.offset', OM_ALU + [OM_OFFSET_SD], 1, 2)
O_VEC = pseudo_op('vec', [OM_EXEC_CND], 1, VARIABLE)
O_COMP = pseudo_op('comp', [], 1, 2)
O_FENCE = pseudo_op('fence')
O_OP_ATOMIC_OFFSET = pseudo_op('op.atomic.offset', OM_ALU_ATOMEXT + [OM_ATOM_OP], 2, 4, [], [[RM_ABS, RM_NEG], [RM_ABS, RM_NEG]])