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Corrected MPEC/MEPC typo error in User Manual #927

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Dec 23, 2023
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Corrected MPEC/MEPC typo error in User Manual #927

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14 changes: 7 additions & 7 deletions docs/source/corev_hw_loop.rst
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Original file line number Diff line number Diff line change
Expand Up @@ -148,13 +148,13 @@ Those handlers should manage MEPC and lpcountX CSRs updates because an hw loop e

At the end of the handlers after restoring the context/CSRs, a piece of smart code should be added with following highest to lowest order of priority:

1. if MEPC = lpend0 - 4 and lpcount0 > 1 then MPEC should be set to lpstart0 and lpcount0 should be decremented by 1,
2. else if MEPC = lpend0 - 4 and lpcount0 = 1 then MPEC should be incremented by 4 and lpcount0 should be decremented by 1,
3. else if MEPC = lpend1 - 4 and lpcount1 > 1 then MPEC should be set to lpstart1 and lpcount1 should be decremented by 1,
4. else if MEPC = lpend1 - 4 and lpcount1 = 1 then MPEC should be incremented by 4 and lpcount1 should be decremented by 1,
5. else if (lpstart0 <= MEPC < lpend0 - 4) or (lpstart1 <= MEPC < lpend1 - 4) then MPEC should be incremented by 4,
6. else if instruction at MEPC location is either ecall or ebreak then MPEC should be incremented by 4,
7. else if instruction at MEPC location location is c.ebreak then MPEC should be incremented by 2.
1. if MEPC = lpend0 - 4 and lpcount0 > 1 then MEPC should be set to lpstart0 and lpcount0 should be decremented by 1,
2. else if MEPC = lpend0 - 4 and lpcount0 = 1 then MEPC should be incremented by 4 and lpcount0 should be decremented by 1,
3. else if MEPC = lpend1 - 4 and lpcount1 > 1 then MEPC should be set to lpstart1 and lpcount1 should be decremented by 1,
4. else if MEPC = lpend1 - 4 and lpcount1 = 1 then MEPC should be incremented by 4 and lpcount1 should be decremented by 1,
5. else if (lpstart0 <= MEPC < lpend0 - 4) or (lpstart1 <= MEPC < lpend1 - 4) then MEPC should be incremented by 4,
6. else if instruction at MEPC location is either ecall or ebreak then MEPC should be incremented by 4,
7. else if instruction at MEPC location location is c.ebreak then MEPC should be incremented by 2.

The 2 last cases are the standard ones when ebreak/ecall are not inside an HWLopp.

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