make constant expression for MSVC in fft_small/mpn_mul.c

flintlib · Nov 17, 2023 · 8b750ab · 8b750ab
1 parent 109c48d
commit 8b750ab
Showing 1 changed file with 7 additions and 4 deletions.
diff --git a/src/fft_small/mpn_mul.c b/src/fft_small/mpn_mul.c
@@ -375,6 +375,8 @@ void slow_mpn_to_fft(
 
 #define aindex(i) (((i) < an) ? a[i] : (uint32_t)(0))
 
+#define N_CDIV(a, b) ((a) + (b) - 1) / (b)
+
 #define DEFINE_IT(NP) \
 FLINT_STATIC_NOINLINE void CAT(mpn_to_ffts_hard, NP)( \
     sd_fft_ctx_struct* Rffts, double* d, ulong dstride, \
@@ -384,10 +386,10 @@ FLINT_STATIC_NOINLINE void CAT(mpn_to_ffts_hard, NP)( \
     ulong bits) \
 { \
     ulong np = NP; \
-    ulong nvs = n_cdiv(np, VEC_SZ); \
-    vec4d X[nvs]; \
-    vec4d P[nvs]; \
-    vec4d PINV[nvs]; \
+    ulong nvs = N_CDIV(NP, VEC_SZ); \
+    vec4d X[N_CDIV(NP, VEC_SZ)]; \
+    vec4d P[N_CDIV(NP, VEC_SZ)]; \
+    vec4d PINV[N_CDIV(NP, VEC_SZ)]; \
  \
     for (ulong l = 0; l < nvs; l++) \
     { \
@@ -440,6 +442,7 @@ DEFINE_IT(7)
 DEFINE_IT(8)
 #undef DEFINE_IT
 #undef aindex
+#undef N_CDIV
 
 #define CODE(ir) \
 { \