From b2aeff61418f6ee8e4f2eaf4e71da31260ff8960 Mon Sep 17 00:00:00 2001
From: Fredrik Johansson <fredrik.johansson@gmail.com>
Date: Mon, 15 Jul 2024 07:38:21 +0200
Subject: [PATCH] bump threshold

---
 src/nfloat/mat_mul.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/nfloat/mat_mul.c b/src/nfloat/mat_mul.c
index 57253ed8ed..169722a3ec 100644
--- a/src/nfloat/mat_mul.c
+++ b/src/nfloat/mat_mul.c
@@ -854,7 +854,12 @@ nfloat_mat_mul_block(gr_mat_t C, const gr_mat_t A, const gr_mat_t B, slong min_b
 }
 
 /* Minimum precision for using fixed-point arithmetic */
-#define NFLOAT_MAT_MUL_FIXED_CUTOFF 192
+
+/* TODO: for *unsigned* matrices, there is a speedup already for
+   prec = 192. Consider inlining fixed-point additions/subtractions for
+   4 and 5 limbs to extend this to general matrices. */
+/* #define NFLOAT_MAT_MUL_FIXED_CUTOFF 192 */
+#define NFLOAT_MAT_MUL_FIXED_CUTOFF 320
 
 /* first cutoff:  classical -> fixed_classical
    second cutoff: fixed_classical -> waksman */