1 files changed, 34 insertions, 0 deletions
diff --git a/src/Specific/montgomery64_2e174m17/fesub.c b/src/Specific/montgomery64_2e174m17/fesub.c
new file mode 100644
index 000000000..262cd52ed
--- /dev/null
+++ b/src/Specific/montgomery64_2e174m17/fesub.c
@@ -0,0 +1,34 @@
+#include <stdint.h>
+#include <stdbool.h>
+#include <x86intrin.h>
+#include "liblow.h"
+
+#include "fesub.h"
+
+typedef unsigned int uint128_t __attribute__((mode(TI)));
+
+#if (defined(__GNUC__) || defined(__GNUG__)) && !(defined(__clang__)||defined(__INTEL_COMPILER))
+// https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81294
+#define _subborrow_u32 __builtin_ia32_sbb_u32
+#define _subborrow_u64 __builtin_ia32_sbb_u64
+#endif
+
+#undef force_inline
+#define force_inline __attribute__((always_inline))
+
+void force_inline fesub(uint64_t* out, uint64_t x6, uint64_t x7, uint64_t x5, uint64_t x10, uint64_t x11, uint64_t x9)
+{  uint64_t x13; uint8_t x14 = _subborrow_u64(0x0, x5, x9, &x13);
+{  uint64_t x16; uint8_t x17 = _subborrow_u64(x14, x7, x11, &x16);
+{  uint64_t x19; uint8_t x20 = _subborrow_u64(x17, x6, x10, &x19);
+{  uint64_t x21 = (uint64_t)cmovznz(x20, 0x0, 0xffffffffffffffffL);
+{  uint64_t x22 = (x21 & 0xffffffffffffffefL);
+{  uint64_t x24; uint8_t x25 = _addcarryx_u64(0x0, x13, x22, &x24);
+{  uint64_t x26 = (x21 & 0xffffffffffffffffL);
+{  uint64_t x28; uint8_t x29 = _addcarryx_u64(x25, x16, x26, &x28);
+{  uint64_t x30 = (x21 & 0x3fffffffffff);
+{  uint64_t x32; uint8_t _ = _addcarryx_u64(x29, x19, x30, &x32);
+out[0] = x32;
+out[1] = x28;
+out[2] = x24;
+}}}}}}}}}}
+// caller: uint64_t out[3];