1 files changed, 87 insertions, 0 deletions
diff --git a/newlib/libc/machine/nds32/setjmp.S b/newlib/libc/machine/nds32/setjmp.S
new file mode 100644
index 000000000..90b162ef8
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+++ b/newlib/libc/machine/nds32/setjmp.S
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+/*
+Copyright (c) 2013 Andes Technology Corporation.
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+    Redistributions of source code must retain the above copyright
+    notice, this list of conditions and the following disclaimer.
+
+    Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+
+    The name of the company may not be used to endorse or promote
+    products derived from this software without specific prior written
+    permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
+DISCLAIMED.  IN NO EVENT SHALL RED HAT INCORPORATED BE LIABLE FOR ANY
+DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES
+(INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES;
+LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND
+ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+(INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
+SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+
+The setjmp/longjmp for nds32.
+The usage of thirty-two 32-bit General Purpose Registers (GPR):
+  $r28 : $fp
+  $r29 : $gp
+  $r30 : $lp
+  $r31 : $sp
+
+  caller-save registers: $r0 ~ $r5, $r16 ~ $r23
+  callee-save registers: $r6 ~ $r10, $r11 ~ $r14
+  reserved for assembler : $r15
+  reserved for other use : $r24, $r25, $r26, $r27
+
+Save all callee-save registers and $fp, $gp, $lp and $sp.
+*/
+
+/* int setjmp(jmp_buf env);  */
+	.text
+	.align	2
+	.global	setjmp
+	.type	setjmp, @function
+setjmp:
+#ifdef __NDS32_REDUCED_REGS__
+	/* This case, save 10 words.  */
+	smw.bim   $r6, [$r0], $r10, 0x0
+	smw.bim  $r31, [$r0], $r31, 0xf
+#else
+	/* This case, save 17 words.  */
+	smw.bim   $r6, [$r0], $r14, 0x0
+	smw.bim  $r16, [$r0], $r19, 0xf
+#endif
+
+	/* Set return value to zero.  */
+	movi	$r0, 0
+	ret
+	.size	setjmp, .-setjmp
+
+
+/* void longjmp(jmp_buf env, int val);  */
+	.text
+	.align	2
+	.global	longjmp
+	.type	longjmp, @function
+longjmp:
+#ifdef __NDS32_REDUCED_REGS__
+	lmw.bim   $r6, [$r0], $r10, 0x0
+	lmw.bim  $r31, [$r0], $r31, 0xf
+#else
+	lmw.bim   $r6, [$r0], $r14, 0x0
+	lmw.bim  $r16, [$r0], $r19, 0xf
+#endif
+	/* If the value val is 0, 1 will be returned instead.  */
+	bnez	$r1, 1f
+	movi	$r1, 1
+1:
+	move	$r0, $r1
+	ret
+	.size	longjmp, .-longjmp