UpsilonNumworks/Upsilon
1
0
Fork 0
mirror of https://github.com/UpsilonNumworks/Upsilon.git synced 2026-03-28 18:20:14 +01:00
Code Issues Packages Projects Releases Wiki Activity

[ion] ExamMode: change firstOneBitInByte name to

Browse Source 
numberOfBitsAfterLeadingZeroes and add comment
This commit is contained in:
Émilie Feral
2019-12-19 15:31:34 +01:00
committed by LeaNumworks
parent 73673384ae
commit 3454265d7e
1 changed files with 4 additions and 3 deletions
Download Patch File Download Diff File Expand all files Collapse all files

7
ion/src/device/shared/drivers/exam_mode.cpp
View File

@@ -32,7 +32,8 @@ char ones[Config::ExamModeBufferSize]
constexpr static size_t numberOfBitsInByte = 8;
size_t firstOneBitInByte(int i) {
// if i = 0b000011101, firstOneBitInByte(i) returns 5
size_t numberOfBitsAfterLeadingZeroes(int i) {
int minShift = 0;
int maxShift = numberOfBitsInByte;
while (maxShift > minShift+1) {
@@ -77,7 +78,7 @@ uint8_t FetchExamMode() {
// Count the number of 0[3] before reading address
uint32_t nbOfZerosBefore = ((readingAddress - (uint8_t *)&_exam_mode_buffer_start) * numberOfBitsInByte) % 3;
// Count the number of 0[3] at reading address
size_t numberOfLeading0 = (numberOfBitsInByte - firstOneBitInByte(*readingAddress)) % 3;
size_t numberOfLeading0 = (numberOfBitsInByte - numberOfBitsAfterLeadingZeroes(*readingAddress)) % 3;
return (nbOfZerosBefore + numberOfLeading0) % 3;
}
@@ -85,7 +86,7 @@ void IncrementExamMode(uint8_t delta) {
assert(delta == 1 || delta == 2);
uint8_t * writingAddress = SignificantExamModeAddress();
assert(*writingAddress != 0);
size_t nbOfTargetedOnes = firstOneBitInByte(*writingAddress);
size_t nbOfTargetedOnes = numberOfBitsAfterLeadingZeroes(*writingAddress);
// Compute the new value with delta bits switched to 0.
/* We write in 2 bytes instead of 1, in case there was only one bit