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Fix build for cores without XT_NSAU, update in micro_allocations_info.cc #3643

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Fix build for cores without XT_NSAU, update in micro_allocations_info.cc #3643

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648a5ff
signal: fix HiFi4 build for cores without XT_NSAU
unmeshna017 Jul 30, 2026
aa6277e
Used GetBuiltinCode() wrapper function instead of opcode->builtin_cod…
unmeshna017 Jul 30, 2026
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0 ...kernels/xtensa/filter_bank_square_root.cc → ...els/xtensa/filter_bank_square_root.cc.bak
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0 ...micro/kernels/xtensa/xtensa_square_root.S → ...o/kernels/xtensa/xtensa_square_root.S.bak
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2 changes: 1 addition & 1 deletion signal/src/msb_32.cc
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Original file line number Diff line number Diff line change
Expand Up @@ -27,7 +27,7 @@ namespace tflm_signal {

// TODO(b/291167350): can allow __builtin_clz to be used in more cases here
uint32_t MostSignificantBit32(uint32_t x) {
#if defined(XTENSA)
#if defined(XTENSA) && defined(XT_NSAU)
// XT_NSAU returns the number of left shifts needed to put the MSB in the
// leftmost position. Returns 32 if the argument is 0.
return 32 - XT_NSAU(x);
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2 changes: 1 addition & 1 deletion signal/src/msb_64.cc
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Expand Up @@ -26,7 +26,7 @@ namespace tflm_signal {
// TODO(b/286250473): remove namespace once de-duped libraries above

uint32_t MostSignificantBit64(uint64_t x) {
#if defined(XTENSA)
#if defined(XTENSA) && defined(XT_NSAU)
// XT_NSAU returns the number of left shifts needed to put the MSB in the
// leftmost position. Returns 32 if the argument is 0.
uint32_t upper = 64 - XT_NSAU((uint32_t)(x >> 32));
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3 changes: 2 additions & 1 deletion tensorflow/lite/micro/micro_allocation_info.cc
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Expand Up @@ -23,6 +23,7 @@ limitations under the License.
#include "tensorflow/lite/micro/memory_helpers.h"
#include "tensorflow/lite/micro/memory_planner/greedy_memory_planner.h"
#include "tensorflow/lite/micro/micro_log.h"
#include "tensorflow/lite/schema/schema_utils.h"

namespace tflite {

Expand Down Expand Up @@ -59,7 +60,7 @@ TfLiteStatus AllocationInfoBuilder::MarkSubgraphLifetimesIfNecessary(
int second_subgraph_index = -1;
const OperatorCode* opcode =
model_->operator_codes()->Get(op->opcode_index());
switch (opcode->builtin_code()) {
switch (GetBuiltinCode(opcode)) {
case BuiltinOperator_IF: {
first_subgraph_index =
op->builtin_options_as_IfOptions()->then_subgraph_index();
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