Optimize source_layers_cache for the cache memory
Swapping the array indices should increase the locality of the memory access.
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1 changed files with 4 additions and 4 deletions
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@ -111,7 +111,7 @@ void layer_debug(void)
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#endif
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#if !defined(NO_ACTION_LAYER) && defined(PREVENT_STUCK_MODIFIERS)
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uint8_t source_layers_cache[MAX_LAYER_BITS][(MATRIX_ROWS * MATRIX_COLS + 7) / 8] = {0};
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uint8_t source_layers_cache[(MATRIX_ROWS * MATRIX_COLS + 7) / 8][MAX_LAYER_BITS] = {0};
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void update_source_layers_cache(keypos_t key, uint8_t layer)
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{
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@ -120,9 +120,9 @@ void update_source_layers_cache(keypos_t key, uint8_t layer)
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const uint8_t storage_bit = key_number % 8;
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for (uint8_t bit_number = 0; bit_number < MAX_LAYER_BITS; bit_number++) {
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source_layers_cache[bit_number][storage_row] ^=
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source_layers_cache[storage_row][bit_number] ^=
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(-((layer & (1U << bit_number)) != 0)
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^ source_layers_cache[bit_number][storage_row])
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^ source_layers_cache[storage_row][bit_number])
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& (1U << storage_bit);
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}
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}
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@ -136,7 +136,7 @@ uint8_t read_source_layers_cache(keypos_t key)
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for (uint8_t bit_number = 0; bit_number < MAX_LAYER_BITS; bit_number++) {
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layer |=
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((source_layers_cache[bit_number][storage_row]
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((source_layers_cache[storage_row][bit_number]
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& (1U << storage_bit)) != 0)
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<< bit_number;
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}
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