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Commit c87fcdb29b38e0e89c1c20bad3c39adecaa9c4ef

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Parents : b5fc0ae
Author : Ahmet Inan <inan@aicodix.de>
Date : 2024-03-25T12:11:29+01:00

skip reduction with addition and subtraction

Changes

1 files changed, 6 insertions(+), 6 deletions(-)

M cauchy_reed_solomon_erasure_coding2.hh +6 -6

Diff

diff --git a/cauchy_reed_solomon_erasure_coding2.hh b/cauchy_reed_solomon_erasure_coding2.hh
index d6416e4..d3da684 100644
--- a/cauchy_reed_solomon_erasure_coding2.hh
+++ b/cauchy_reed_solomon_erasure_coding2.hh
@@ -23,7 +23,7 @@ struct CauchyReedSolomonErasureCoding2
__attribute__((flatten))
PF inverse_cauchy_matrix(const PF *rows, int i, int j, int n)
{
-#if 1
+#if 0
PF col_i(i);
PF prod_xy(1), prod_x(1), prod_y(1);
for (int k = 0; k < n; k++) {
@@ -41,9 +41,9 @@ struct CauchyReedSolomonErasureCoding2
PF num(1), den(1);
for (int k = 0; k < n; k++) {
PF col_k(k);
- num *= (rows[k] + col_i);
+ num *= add(rows[k], col_i);
if (k != i)
- den *= (col_i - col_k);
+ den *= sub(col_i, col_k);
}
row_num = num;
row_den = den;
@@ -51,11 +51,11 @@ struct CauchyReedSolomonErasureCoding2
PF num(row_num), den(row_den);
for (int k = 0; k < n; k++) {
PF col_k(k);
- num *= (rows[j] + col_k);
+ num *= add(rows[j], col_k);
if (k != j)
- den *= (rows[j] - rows[k]);
+ den *= sub(rows[j], rows[k]);
}
- return num / ((rows[j] + col_i) * den);
+ return num / (add(rows[j], col_i) * den);
#endif
}
__attribute__((flatten))

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