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feat(heap): add a MALLOC_CAP_SIMD flag

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MALLOC_CAP_SIMD can be used to allocate memory to be used for SIMD instructions
This commit is contained in:
Song Ruo Jing
2025-02-08 16:28:41 +08:00
parent 5fa3e381c9
commit 6cb64d7025
12 changed files with 70 additions and 17 deletions
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components/esp_mm/heap_align_hw.c
+9 -1
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@@ -20,7 +20,7 @@
#define HEAP_IRAM_ATTR IRAM_ATTR
#endif
#define CAPS_NEEDING_ALIGNMENT (MALLOC_CAP_DMA|MALLOC_CAP_DMA_DESC_AHB|MALLOC_CAP_DMA_DESC_AXI|MALLOC_CAP_CACHE_ALIGNED)
#define CAPS_NEEDING_ALIGNMENT (MALLOC_CAP_DMA|MALLOC_CAP_DMA_DESC_AHB|MALLOC_CAP_DMA_DESC_AXI|MALLOC_CAP_CACHE_ALIGNED|MALLOC_CAP_SIMD)
HEAP_IRAM_ATTR void esp_heap_adjust_alignment_to_hw(size_t *p_alignment, size_t *p_size, uint32_t *p_caps)
{
@@ -72,6 +72,14 @@ HEAP_IRAM_ATTR void esp_heap_adjust_alignment_to_hw(size_t *p_alignment, size_t
if (cache_alignment_bytes > alignment) {
alignment = cache_alignment_bytes;
}
#if SOC_SIMD_INSTRUCTION_SUPPORTED
// SIMD instructions preferred data alignment, SOC_SIMD_PREFERRED_DATA_ALIGNMENT, which is also definitely a power of two
if (caps & MALLOC_CAP_SIMD) {
alignment = (alignment > SOC_SIMD_PREFERRED_DATA_ALIGNMENT) ? alignment : SOC_SIMD_PREFERRED_DATA_ALIGNMENT;
}
#endif
// Align up `size` to resulting alignment as well.
size = (size + alignment - 1) & (~(alignment - 1));