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109 lines
3.0 KiB
C
Executable File
109 lines
3.0 KiB
C
Executable File
/**
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* Jingga
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*
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* @copyright Jingga
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* @license OMS License 2.0
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* @version 1.0.0
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* @link https://jingga.app
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*/
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#ifndef COMS_ARCHITECTURE_ARM_NEON_UTILS_H
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#define COMS_ARCHITECTURE_ARM_NEON_UTILS_H
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#include <stdlib.h>
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#include "../../../../stdlib/Types.h"
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#include "../../../../compiler/CompilerUtils.h"
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#include "../../../../stdlib/Simd.h"
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#include <arm_neon.h>
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// @question When do we want to use neon and when do we want to use sve?
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// Only allowed for data >= 64 bits
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bool is_empty(const uint8* region, uint64 size, int32 steps = 8) {
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if (*((uint64 *) region) != 0) {
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return false;
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}
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const uint8* end = region + size;
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steps = intrin_validate_steps(region, steps);
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switch (steps) {
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case 16: {
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while (region + 64 <= end) {
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uint8x16_t chunk1 = vld1q_u8(region);
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uint8x16_t chunk2 = vld1q_u8(region + 16);
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uint8x16_t chunk3 = vld1q_u8(region + 32);
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uint8x16_t chunk4 = vld1q_u8(region + 48);
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uint8x16_t zero = vdupq_n_u8(0);
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uint8x16_t result1 = vceqq_u8(chunk1, zero);
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uint8x16_t result2 = vceqq_u8(chunk2, zero);
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uint8x16_t result3 = vceqq_u8(chunk3, zero);
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uint8x16_t result4 = vceqq_u8(chunk4, zero);
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uint8x16_t combined = vandq_u8(vandq_u8(result1, result2), vandq_u8(result3, result4));
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if (vminvq_u8(combined) != 0xFF) {
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return false;
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}
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region += 64;
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}
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break;
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}
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case 8: {
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while (region + 32 <= end) {
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uint8x16_t chunk1 = vld1q_u8(region);
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uint8x16_t chunk2 = vld1q_u8(region + 16);
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uint8x16_t zero = vdupq_n_u8(0);
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uint8x16_t result1 = vceqq_u8(chunk1, zero);
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uint8x16_t result2 = vceqq_u8(chunk2, zero);
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uint8x16_t combined = vandq_u8(result1, result2);
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if (vminvq_u8(combined) != 0xFF) {
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return false;
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}
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region += 32;
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}
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break;
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}
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case 4: {
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while (region + 16 <= end) {
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uint8x16_t chunk = vld1q_u8(region);
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uint8x16_t zero = vdupq_n_u8(0);
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uint8x16_t result = vceqq_u8(chunk, zero);
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if (vminvq_u8(result) != 0xFF) {
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return false;
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}
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region += 16;
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}
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break;
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}
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case 1: {
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while (region + 4 <= end) {
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if (*((const uint32 *) region) != 0) {
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return false;
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}
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region += 4;
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}
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while (region < end) {
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if (*region++ != 0) {
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return false;
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}
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}
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break;
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}
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default:
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UNREACHABLE();
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}
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return true;
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}
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#endif |