diff options
Diffstat (limited to 'src/broadcom/compiler/nir_to_vir.c')
| -rw-r--r-- | src/broadcom/compiler/nir_to_vir.c | 33 |
1 files changed, 27 insertions, 6 deletions
diff --git a/src/broadcom/compiler/nir_to_vir.c b/src/broadcom/compiler/nir_to_vir.c index 53af9be9f74..45e34c70a49 100644 --- a/src/broadcom/compiler/nir_to_vir.c +++ b/src/broadcom/compiler/nir_to_vir.c @@ -115,6 +115,20 @@ vir_emit_thrsw(struct v3d_compile *c) c->lock_scoreboard_on_first_thrsw = true; } +uint32_t +v3d_get_op_for_atomic_add(nir_intrinsic_instr *instr, unsigned src) +{ + if (nir_src_is_const(instr->src[src])) { + int64_t add_val = nir_src_as_int(instr->src[src]); + if (add_val == 1) + return V3D_TMU_OP_WRITE_AND_READ_INC; + else if (add_val == -1) + return V3D_TMU_OP_WRITE_OR_READ_DEC; + } + + return V3D_TMU_OP_WRITE_ADD_READ_PREFETCH; +} + static uint32_t v3d_general_tmu_op(nir_intrinsic_instr *instr) { @@ -129,8 +143,9 @@ v3d_general_tmu_op(nir_intrinsic_instr *instr) case nir_intrinsic_store_scratch: return V3D_TMU_OP_REGULAR; case nir_intrinsic_ssbo_atomic_add: + return v3d_get_op_for_atomic_add(instr, 2); case nir_intrinsic_shared_atomic_add: - return V3D_TMU_OP_WRITE_ADD_READ_PREFETCH; + return v3d_get_op_for_atomic_add(instr, 1); case nir_intrinsic_ssbo_atomic_imin: case nir_intrinsic_shared_atomic_imin: return V3D_TMU_OP_WRITE_SMIN; @@ -171,11 +186,16 @@ static void ntq_emit_tmu_general(struct v3d_compile *c, nir_intrinsic_instr *instr, bool is_shared_or_scratch) { - /* XXX perf: We should turn add/sub of 1 to inc/dec. Perhaps NIR - * wants to have support for inc/dec? - */ - uint32_t tmu_op = v3d_general_tmu_op(instr); + + /* If we were able to replace atomic_add for an inc/dec, then we + * need/can to do things slightly different, like not loading the + * amount to add/sub, as that is implicit. + */ + bool atomic_add_replaced = ((instr->intrinsic == nir_intrinsic_ssbo_atomic_add || + instr->intrinsic == nir_intrinsic_shared_atomic_add) && + (tmu_op == V3D_TMU_OP_WRITE_AND_READ_INC || + tmu_op == V3D_TMU_OP_WRITE_OR_READ_DEC)); bool is_store = (instr->intrinsic == nir_intrinsic_store_ssbo || instr->intrinsic == nir_intrinsic_store_scratch || instr->intrinsic == nir_intrinsic_store_shared); @@ -188,7 +208,8 @@ ntq_emit_tmu_general(struct v3d_compile *c, nir_intrinsic_instr *instr, } else if (instr->intrinsic == nir_intrinsic_load_ssbo || instr->intrinsic == nir_intrinsic_load_ubo || instr->intrinsic == nir_intrinsic_load_scratch || - instr->intrinsic == nir_intrinsic_load_shared) { + instr->intrinsic == nir_intrinsic_load_shared || + atomic_add_replaced) { offset_src = 0 + has_index; } else if (is_store) { offset_src = 1 + has_index; |