broadwell mparam, to be confirmed because server was under heavy load

src/mpn_extras/x86_64/broadwell/flint-mparam.h

@@ -9,27 +9,28 @@
     (at your option) any later version.  See <https://www.gnu.org/licenses/>.
 */
 
-/* Tuning for generic CPU. Is probably far from optimal. */
+/* parameters found for Intel Xeon E7-4820 v4 */
 
 #ifndef FLINT_MPARAM_H
 #define FLINT_MPARAM_H
 
+/* TODO these were taken directly from the generic x86-64 flint-mparam.h  ----> */
 #define FLINT_FFT_SMALL_MUL_THRESHOLD           1000
 #define FLINT_FFT_SMALL_SQR_THRESHOLD           1400
 
 #define FLINT_FFT_MUL_THRESHOLD                32000
 #define FLINT_FFT_SQR_THRESHOLD                32000
+/* TODO these were taken directly from the generic x86-64 flint-mparam.h  ----> */
 
 #define FFT_TAB \
-   { {4, 4}, {4, 3}, {3, 2}, {2, 1}, {2, 1} }
+   { { 4, 4 }, { 4, 3 }, { 4, 3 }, { 3, 2 }, { 2, 1 } }
 
 #define MULMOD_TAB \
-   { 4, 4, 4, 4, 4, 3, 3, 3, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 1 }
+   { 4, 4, 4, 4, 4, 3, 3, 4, 4, 3, 3, 3, 3, 2, 2, 2, 2, 2, 1, 2, 2, 1, 1 }
 
-#define FFT_N_NUM                                 19
-#define FFT_MULMOD_2EXPP1_CUTOFF                 128
+#define FFT_N_NUM 23
+#define FFT_MULMOD_2EXPP1_CUTOFF 65536
 
-/* TODO set value                        */
-#define FLINT_MULMOD_SHOUP_THRESHOLD 10
+#define FLINT_MULMOD_SHOUP_THRESHOLD 14
 
 #endif