summaryrefslogtreecommitdiff
path: root/arch/nds32/math-emu/fs2si.c
diff options
context:
space:
mode:
Diffstat (limited to 'arch/nds32/math-emu/fs2si.c')
-rw-r--r--arch/nds32/math-emu/fs2si.c29
1 files changed, 29 insertions, 0 deletions
diff --git a/arch/nds32/math-emu/fs2si.c b/arch/nds32/math-emu/fs2si.c
new file mode 100644
index 000000000000..b4931d60980e
--- /dev/null
+++ b/arch/nds32/math-emu/fs2si.c
@@ -0,0 +1,29 @@
+// SPDX-License-Identifier: GPL-2.0
+// Copyright (C) 2005-2019 Andes Technology Corporation
+#include <linux/uaccess.h>
+
+#include <asm/sfp-machine.h>
+#include <math-emu/soft-fp.h>
+#include <math-emu/single.h>
+
+void fs2si(void *ft, void *fa)
+{
+ int r;
+
+ FP_DECL_S(A);
+ FP_DECL_EX;
+
+ FP_UNPACK_SP(A, fa);
+
+ if (A_c == FP_CLS_INF) {
+ *(int *)ft = (A_s == 0) ? 0x7fffffff : 0x80000000;
+ __FPU_FPCSR |= FP_EX_INVALID;
+ } else if (A_c == FP_CLS_NAN) {
+ *(int *)ft = 0xffffffff;
+ __FPU_FPCSR |= FP_EX_INVALID;
+ } else {
+ FP_TO_INT_ROUND_S(r, A, 32, 1);
+ __FPU_FPCSR |= FP_CUR_EXCEPTIONS;
+ *(int *)ft = r;
+ }
+}