diff options
Diffstat (limited to 'core')
| -rw-r--r-- | core/nds32/__builtin.c | 16 | ||||
| -rw-r--r-- | core/nds32/build.mk | 2 |
2 files changed, 17 insertions, 1 deletions
diff --git a/core/nds32/__builtin.c b/core/nds32/__builtin.c new file mode 100644 index 0000000000..45baa59aff --- /dev/null +++ b/core/nds32/__builtin.c @@ -0,0 +1,16 @@ +/* Copyright 2017 The Chromium OS Authors. All rights reserved. + * Use of this source code is governed by a BSD-style license that can be + * found in the LICENSE file. + */ + +#include "common.h" + +/* + * __builtin_ffs: + * Returns one plus the index of the least significant 1-bit of x, + * or if x is zero, returns zero. + */ +int __ffssi2(int x) +{ + return 32 - __builtin_clz(x & -x); +} diff --git a/core/nds32/build.mk b/core/nds32/build.mk index 5b87d85b15..523ac5300c 100644 --- a/core/nds32/build.mk +++ b/core/nds32/build.mk @@ -12,5 +12,5 @@ $(call set-option,CROSS_COMPILE,$(CROSS_COMPILE_nds32),nds32le-cros-elf-) # CPU specific compilation flags CFLAGS_CPU+=-march=v3m -Os -core-y=cpu.o init.o panic.o task.o switch.o __muldi3.o math.o +core-y=cpu.o init.o panic.o task.o switch.o __muldi3.o math.o __builtin.o core-$(CONFIG_FPU)+=__libsoftfpu.o |