- volatile register uint32_t *pItem = (uint32_t *)mRMT_mem_ptr;
- for (register int i = 0; i < PULSES_PER_FILL/8; i++) {
- if (mCur < mSize) {
- register uint32_t tmp1, tmp2, tmp3, tmp4;
- #if 1
- register uint8_t pData = mPixelData[mCur];
- register rmt_item32_t *bitTablePtr = &bitTable[0][0];
- #if 1
- // This is a slight speedup by not waiting for the load stall
- // cycles. By the time the load is finished, the store should
- // be ready. Stores aren't as critical due to a write buffer,
- // but you can't immediately store after loading without losing
- // a couple of cycles due to pipeline stalls.
- __asm__ __volatile__(
- // Get upper nibble of color and multiply it by 16 to
- // get the address in the table
- " srli %[tmp], %[p], 4 \n"
- " slli %[tmp], %[tmp], 4 \n"
- // Add color nibble as offset to table
- " add.n %[tmp], %[tmp], %[bitTable] \n"
- // Load 4 words from table
- " l32i %[tmp1], %[tmp],0 \n"
- " l32i %[tmp2], %[tmp],4 \n"
- " l32i %[tmp3], %[tmp],8 \n"
- " l32i %[tmp4], %[tmp],12 \n"
- // Store 4 words to RMT memory
- " s32i %[tmp1], %[pRmtMem], 0x0 \n"
- " s32i %[tmp2], %[pRmtMem], 0x4 \n"
- " s32i %[tmp3], %[pRmtMem], 0x8 \n"
- " s32i %[tmp4], %[pRmtMem], 0xc \n"
- // Take the lower nibble and multiply it by 16 to
- // get the address in the table
- " extui %[tmp], %[p], 0, 4 \n"
- " slli %[tmp], %[tmp], 4 \n"
- // Add color nibble as offset to table
- " add.n %[tmp], %[tmp], %[bitTable] \n"
- // Load 4 words from table
- " l32i %[tmp1], %[tmp],0 \n"
- " l32i %[tmp2], %[tmp],4 \n"
- " l32i %[tmp3], %[tmp],8 \n"
- " l32i %[tmp4], %[tmp],12 \n"
- // Store 4 words to RMT memory
- " s32i %[tmp1], %[pRmtMem], 0x10 \n"
- " s32i %[tmp2], %[pRmtMem], 0x14 \n"
- " s32i %[tmp3], %[pRmtMem], 0x18 \n"
- " s32i %[tmp4], %[pRmtMem], 0x1c \n"
- // Update RMT memory pointer
- " addi.n %[pRmtMem], %[pRmtMem], 0x20\n"
- // Flush the writes
- " memw \n"
- : [tmp] "=&r"(tmp), [pRmtMem] "+r"(pItem),
- [tmp1] "=&r"(tmp1),[tmp2] "=&r"(tmp2),
- [tmp3] "=&r"(tmp3), [tmp4] "=&r"(tmp4)
- : [bitTable] "r"(bitTablePtr), [p] "r"(pData)
- : );
- #else
- // This attempts to do the same thing but with the vector load
- // instructions. This crashes for some unknown reason when the
- // ee.vld.128.ip instruction hits. It's not due to alignment
- // but for some reason the ee instruction is barfing on the address.
- __asm__ __volatile__(
- " srli %[tmp], %[p], 4 \n"
- " slli %[tmp], %[tmp], 4 \n"
- " add.n %[tmp], %[tmp], %[bitTable] \n"
- " mov.n a15, %[tmp] \n"
- " l32i a14, %[tmp], 0 \n"
- " ee.vld.128.ip q0,%[tmp],0 \n"
- " extui %[tmp], %[p], 0, 4 \n"
- " slli %[tmp], %[tmp], 4 \n"
- " add.n %[tmp], %[tmp], %[bitTable] \n"
- " ee.vld.128.ip q1,%[tmp],0 \n"
- " ee.movi.32.a q0, %[tmp], 3 \n"
- " s32i %[tmp], %[pRmtMem], 0x0 \n"
- " ee.movi.32.a q0, %[tmp], 2 \n"
- " s32i %[tmp], %[pRmtMem], 0x4 \n"
- " ee.movi.32.a q0, %[tmp], 1 \n"
- " s32i %[tmp], %[pRmtMem], 0x8 \n"
- " ee.movi.32.a q0, %[tmp], 0 \n"
- " s32i %[tmp], %[pRmtMem], 0xc \n"
- " ee.movi.32.a q1, %[tmp], 3 \n"
- " s32i %[tmp], %[pRmtMem], 0x10 \n"
- " ee.movi.32.a q1, %[tmp], 2 \n"
- " s32i %[tmp], %[pRmtMem], 0x14 \n"
- " ee.movi.32.a q1, %[tmp], 1 \n"
- " s32i %[tmp], %[pRmtMem], 0x18 \n"
- " ee.movi.32.a q1, %[tmp], 0 \n"
- " s32i %[tmp], %[pRmtMem], 0x1c \n"
- " addi %[pRmtMem],%[pRmtMem], 0x20 \n"
- " memw \n"
- : [tmp] "=&r"(tmp), [pRmtMem] "+r"(pItem)
- : [bitTable] "r"(bitTablePtr), [p] "r"(pData)
- : "a14", "a15");
- #endif
- mCur++;
ESP32 S3 ee.vld.128.ip instruction crashes
ESP32 S3 ee.vld.128.ip instruction crashes
When I insert the instruction ee.vld.128.ip instruction into my code I get a trap. The address I am passing is correct, it is 16 byte aligned (actually 64 byte aligned) and readable using l32i. This is on an ESP32 S3.
Re: ESP32 S3 ee.vld.128.ip instruction crashes
Note that the almost identical code that doesn't use the ee.vld.128.ip instruction works fine.
Here is my code:
Here is my code:
Re: ESP32 S3 ee.vld.128.ip instruction crashes
Is this the same issue you have described in https://esp32.com/viewtopic.php?f=2&t=30121? If yes, please avoid creating duplicate topics. If no, could you please point out the difference?
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