+===========+
|P/ECE¸¦µæ¼¼|
+===========+

P/ECE¸¦µæµ­Ï¿ 2015ǯ
====================

* Thu Nov 26 21:59:10 JST 2015 Naoyuki Sawa
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	¢£C¸À¸ì¤Ç½ñ¤¯¾ì¹ç1

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			¨¢	int a1(int x) {
			¨¢		return !!x;
			¨¢	}
			¨¢	int a2(int x) {
			¨¢		return x ? 1 : 0;
			¨¢	}
			¨¢	int a3(int x) {
			¨¢		if(x) {
			¨¢			return 1;
			¨¢		} else {
			¨¢			return 0;
			¨¢		}
			¨¢	}

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			¨¢	a1:
			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		xsrl	%r10, 31
			¨¢		ret
			¨¢	a2:
			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		xsrl	%r10, 31
			¨¢		ret
			¨¢	a3:
			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		xsrl	%r10, 31
			¨¢		ret

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			¨¢	return (unsigned)(-x | x) >> 31;

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			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		srl	%r10, 8		;//¨¤
			¨¢		srl	%r10, 8		;//¨¢xsrl %r10, 31
			¨¢		srl	%r10, 8		;//¨¢
			¨¢		srl	%r10, 7		;//¨¥
			¨¢		ret

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			¨¢		cmp	%r12, 0
			¨¢		jreq.d	3
			¨¢		 ld.w	%r10, 0
			¨¢		 ld.w	%r10, 1
			¨¢		ret

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			¨¢		ld.w	%r10, 0
			¨¢		cmp	%r10, %r12
			¨¢		ret.d
			¨¢		adc	%r10, %r10	;//¤Á¤Ê¤ß¤ËTRUE¤ò1¤Çɽ¤¹¾ì¹ç¤Ï¤³¤ÎÄ̤ê¤Ç¤¹¤¬¡¢VisualBasic¤ß¤¿¤¤¤ËTRUE¤ò-1¤Çɽ¤·¤¿¤¤¾ì¹ç¤Ï¡¢¤³¤Î¹Ô¤ò¡Ösbc %r10,%r10¡×¤ËÊѤ¨¤ì¤Ðok¤Ç¤¹¡£

	¢£C¸À¸ì¤Ç½ñ¤¯¾ì¹ç2

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			¨¢	int b1(int x) {
			¨¢		int y = !!x;
			¨¢		return y;
			¨¢	}
			¨¢	int b2(int x) {
			¨¢		int y = x ? 1 : 0;
			¨¢		return y;
			¨¢	}
			¨¢	int b3(int x) {
			¨¢		int y;
			¨¢		if(x) {
			¨¢			y = 1;
			¨¢		} else {
			¨¢			y = 0;
			¨¢		}
			¨¢		return y;
			¨¢	}

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			¨¢	b1:
			¨¢		ld.w	%r10, %r12
			¨¢		cmp	%r10, 0
			¨¢		jreq	2
			¨¢		ld.w	%r10, 1
			¨¢		ret
			¨¢	b2:
			¨¢		ld.w	%r10, %r12
			¨¢		cmp	%r10, 0
			¨¢		jreq	2
			¨¢		ld.w	%r10, 1
			¨¢		ret
			¨¢	b3:
			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		xsrl	%r10, 31
			¨¢		ret

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			¨¢	int c1(int x) {
			¨¢		x = !!x;
			¨¢		return x;
			¨¢	}
			¨¢	int c2(int x) {
			¨¢		x = x ? 1 : 0;
			¨¢		return x;
			¨¢	}
			¨¢	int c3(int x) {
			¨¢		if(x) {
			¨¢			x = 1;
			¨¢		} else {
			¨¢			x = 0;
			¨¢		}
			¨¢		return x;
			¨¢	}

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			¨¢	c1:
			¨¢		ld.w	%r10, %r12
			¨¢		cmp	%r10, 0
			¨¢		jreq	2
			¨¢		ld.w	%r10, 1
			¨¢		ret
			¨¢	c2:
			¨¢		ld.w	%r10, %r12
			¨¢		cmp	%r10, 0
			¨¢		jreq	2
			¨¢		ld.w	%r10, 1
			¨¢		ret
			¨¢	c3:
			¨¢		ld.w	%r10, %r12
			¨¢		cmp	%r10, 0
			¨¢		jreq	2
			¨¢		ld.w	%r10, 1
			¨¢		ret

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	¢£C¸À¸ì¤Ç½ñ¤¯¾ì¹ç3

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			¨¢	extern void foo(int x);
			¨¢	//ÂкöÁ°
			¨¢	void d1(int x) {
			¨¢		foo(!!x);
			¨¢	}
			¨¢	void d2(int x) {
			¨¢		foo(x ? 1 : 0);
			¨¢	}
			¨¢	void d3(int x) {
			¨¢		if(x) {
			¨¢			foo(1);
			¨¢		} else {
			¨¢			foo(0);
			¨¢		}
			¨¢	}
			¨¢	//Âкö¸å
			¨¢	void e1(int x) {
			¨¢		x = !!x;
			¨¢		foo(x);
			¨¢	}
			¨¢	void e2(int x) {
			¨¢		x = x ? 1 : 0;
			¨¢		foo(x);
			¨¢	}
			¨¢	void e3(int x) {
			¨¢		if(x) {
			¨¢			x = 1;
			¨¢		} else {
			¨¢			x = 0;
			¨¢		}
			¨¢		foo(x);
			¨¢	}

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			¨¢	;//ÂкöÁ°
			¨¢	d1:
			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		ld.w	%r12, %r10
			¨¢		xsrl	%r12, 31
			¨¢		xcall	foo
			¨¢		ret
			¨¢	d2:
			¨¢		not	%r10, %r12
			¨¢		add	%r10, 1
			¨¢		or	%r10, %r12
			¨¢		ld.w	%r12, %r10
			¨¢		xsrl	%r12, 31
			¨¢		xcall	foo
			¨¢		ret
			¨¢	d3:
			¨¢		cmp	%r12, 0
			¨¢		jreq	2
			¨¢		ld.w	%r12, 1
			¨¢		xcall	foo
			¨¢		ret
			¨¢	;//Âкö¸å
			¨¢	e1:
			¨¢		cmp	%r12, 0
			¨¢		jreq	2
			¨¢		ld.w	%r12, 1
			¨¢		xcall	foo
			¨¢		ret
			¨¢	e2:
			¨¢		cmp	%r12, 0
			¨¢		jreq	2
			¨¢		ld.w	%r12, 1
			¨¢		xcall	foo
			¨¢		ret
			¨¢	e3:
			¨¢		cmp	%r12, 0
			¨¢		jreq	2
			¨¢		ld.w	%r12, 1
			¨¢		xcall	foo
			¨¢		ret

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		(¤³¤ÎÎã¤Ç¤Ï´Ø¿ô¸Æ¤Ó½Ð¤·¤òjp.d¤ËÃÖ¤­´¹¤¨¤ë»ö¤â½ÐÍè¤Þ¤¹¤¬¡¢º£²ó¤ÎËÜÂê¤Ç¤Ï¤Ê¤¤¤Î¤Ç¤½¤Î¤Þ¤Þ¤Ë¤·¤Þ¤·¤¿)

			¨¢		cmp	%r12, 1		;//%psr(C) := x ? 0 :  1
			¨¢		sbc	%r12, %r12	;//%r12    := x ? 0 : -1
			¨¢		xcall.d	foo
			¨¢		add	%r12, 1		;//%r12    := x ? 1 :  0
			¨¢		ret

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* Wed Oct 28 21:41:29 JST 2015 Naoyuki Sawa
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* Tue Oct 27 21:58:28 JST 2015 Naoyuki Sawa
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* Tue Sep 29 21:28:31 JST 2015 Naoyuki Sawa
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		http://www.piece-me.org/piece-lab/srf33/e_scnndx-fix.jpg

* Sun Apr 05 21:06:45 JST 2015 Naoyuki Sawa
- gcc33 abs()¤ÎºÇŬ²½¥Ð¥°

	P/ECE³«È¯´Ä¶­¤ÎC¥³¥ó¥Ñ¥¤¥égcc33¤Ë¤Ï¡¢abs()¤ÎºÇŬ²½¥Ð¥°¤¬¤¢¤ê¤Þ¤¹¡£
	abs()¤ËÂФ·¤Æ¡¢¥Þ¥¤¥Ê¥¹¤ÎÃͤò»ØÄꤷ¤¿»þ¤Ë¥Þ¥¤¥Ê¥¹¤Î¤Þ¤ÞÊÖ¤µ¤ì¤¿¤ê¡¢¥×¥é¥¹¤ÎÃͤò»ØÄꤷ¤¿»þ¤Ë¥Þ¥¤¥Ê¥¹¤Ë¤Ê¤Ã¤ÆÊÖ¤µ¤ì¤¿¤ê¤¹¤ë¥Ð¥°¤Ç¤¹¡£

	¢£¥Ð¥°¤òºÆ¸½¤¹¤ë¥×¥í¥°¥é¥à

		°Ê²¼¤Ë¡¢¥Ð¥°¤òºÆ¸½¤¹¤ë¥µ¥ó¥×¥ë¥×¥í¥°¥é¥à¤ÎÎã¤ò¼¨¤·¤Þ¤¹¡£
		ºÇŬ²½¥ª¥×¥·¥ç¥ó¡Ö-O2¡×¤ò»ØÄꤷ¤Æ¥³¥ó¥Ñ¥¤¥ë¤¹¤ë¤È¡¢ºÇŬ²½¥Ð¥°¤¬È¯À¸¤·¤Þ¤¹¡£
		¤³¤ÎÎã¤Î¾ì¹ç¡¢¡Ö¥Þ¥¤¥Ê¥¹¤ÎÃͤò»ØÄꤷ¤¿»þ¤Ë¥Þ¥¤¥Ê¥¹¤Î¤Þ¤ÞÊÖ¤µ¤ì¤ë¡×¥Ð¥°¤¬È¯À¸¤·¤Æ¤¤¤Þ¤¹¡£

		¢¢absbug1/absbug1.c
		¨¢
		¨¢	#include <piece.h>
		¨¢	#include <string.h>
		¨¢	//------------------------------------------------------------------------------
		¨¢	unsigned char vbuff[DISP_X * DISP_Y];
		¨¢	//{{--- ¥Æ¥¹¥È ---
		¨¢	int x, y = 1;
		¨¢	void test();
		¨¢	//}}--- ¥Æ¥¹¥È ---
		¨¢	//------------------------------------------------------------------------------
		¨¢	void pceAppInit() {
		¨¢		pceAppSetProcPeriod(1);
		¨¢		pceLCDSetBuffer(vbuff);
		¨¢		pceLCDDispStart();
		¨¢	}
		¨¢	//------------------------------------------------------------------------------
		¨¢	void pceAppProc(int cnt) {
		¨¢		memset(vbuff, 0, sizeof vbuff);
		¨¢		pceFontSetPos(0, 0);
		¨¢		pceFontSetTxColor(3);
		¨¢		pceFontSetBkColor(0);
		¨¢		//{{--- ¥Æ¥¹¥È ---
		¨¢		x = 5;
		¨¢		test();
		¨¢		pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 10¡×(Àµ¤·¤¤)
		¨¢		x = -5;
		¨¢		test();
		¨¢		pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -10¡×(Àµ¤·¤¤)
		¨¢		x = 10;
		¨¢		test();
		¨¢		pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
		¨¢		x = -10;
		¨¢		test();
		¨¢		pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -20¡×(¸í¤ê)
		¨¢		//}}--- ¥Æ¥¹¥È ---
		¨¢		pceLCDTrans();
		¨¢		//SELECT¥Ü¥¿¥ó¤¬²¡¤µ¤ì¤¿¤é½ªÎ»¤¹¤ë¡£
		¨¢		if(pcePadGet() & TRG_SELECT) { pceAppReqExit(0); }
		¨¢	}
		¨¢	//------------------------------------------------------------------------------
		¨¢	void pceAppExit() {
		¨¢	}
		¨¢	//------------------------------------------------------------------------------
		¨¢	//{{--- ¥Æ¥¹¥È ---
		¨¢	void test() {
		¨¢		//ÊÑ¿ôx¤ÎÃͤò2Çܤˤ¹¤ë¡£
		¨¢		x <<= 1;
		¨¢		//ÊÑ¿ôy¤ÎÃͤ¬0¤Ç¤Ê¤±¤ì¤Ð¡Ä
		¨¢		if(y) {
		¨¢			//ÊÑ¿ôx¤ÎÀäÂÐÃͤ¬15°Ê¾å¤Ê¤é¤Ð¡Ä
		¨¢			if(abs(x) >= 15) {
		¨¢				//ÊÑ¿ôx¤ÎÃͤò0¤ËÌ᤹¡£
		¨¢				x = 0;
		¨¢			}
		¨¢		}
		¨¢	}
		¨¢	//}}--- ¥Æ¥¹¥È ---
		¨¢

	¢£¥Ð¥°¤Î¸¶°ø¤òÄ´ºº¤¹¤ë

		gcc33¤¬test()´Ø¿ô¤ò¥³¥ó¥Ñ¥¤¥ë¤·¤ÆÀ¸À®¤·¤¿¡¢¥¢¥»¥ó¥Ö¥é¥³¡¼¥É¤ò¼¨¤·¤Þ¤¹¡£(¾¯¤·À°·Á¤·¤Þ¤·¤¿)

		¢¢absbug1/absbug1.ps
		¨¢
		¨¢	test:
		¨¢			xld.w		%r10, [x]		;//%r10 := x
		¨¢			ld.w		%r11, %r10		;//%r11 := x
		¨¢			sll		%r11, 1			;//%r11 := x <<= 1
		¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
		¨¢			xld.w		%r10, [y]		;//%r10 := y
		¨¢			cmp		%r10, 0			;//if(y) {
		¨¢			jreq		__L2			;//  
		¨¢			ld.w		%r10, %r11		;//  %r10 := x			¨¤
		¨¢			jrge		__L1			;//  if(???) {	¢«¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¢¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¤³¤³¤¬¥Ð¥°!!
		¨¢			not		%r10, %r10		;//    %r10 := ~x		¨§¤³¤ÎÈϰϤ¬abs(x)ÁêÅö
		¨¢			add		%r10, 1			;//    %r10 := ~x + 1 = -x	¨¢
		¨¢	__L1:							;//  }				¨¥
		¨¢			cmp		%r10, 14		;//  if(abs(x) > 14)
		¨¢			jrle		__L2			;//    
		¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
		¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
		¨¢	__L2:							;//} }
		¨¢			ret					;//
		¨¢

		abs()¤Î½èÍý¤Ç¡¢x¤¬0°Ê¾å¤«¤òȽÄꤹ¤ë¤¿¤á¤Î¡Öld.w %r10,0¡×¤¬È´¤±¤Æ¤¤¤ë»ö¤¬¡¢¥Ð¥°¤Î¸¶°ø¤Ç¤¹¡£
		abs()¤Î°ú¿ô'x'¤òÈæ³Ó¤»¤º¡¢Ä¾Á°¤Î½èÍý¤ÎÈæ³Ó·ë²Ì'y'¤Ë¤è¤Ã¤Æ¡¢abs()¤ÎÉä¹æȿž¤ò¹Ô¤Ã¤Æ¤·¤Þ¤Ã¤Æ¤¤¤ë¤Î¤Ç¡¢abs()¤¬´Ö°ã¤Ã¤¿·ë²Ì¤Ë¤Ê¤ê¤Þ¤¹¡£

	¢£¥Ð¥°¤¬È¯À¸¤¹¤ë¾ò·ï(¿ä¬)

		¤¤¤í¤¤¤í¤Ê¥Ñ¥¿¡¼¥ó¤ò¤¿¤á¤·¤¿¤È¤³¤í¡¢¤³¤Î¥Ð¥°¤¬È¯À¸¤¹¤ë¾ò·ï¤Ï¡¢¤ª¤ª¤è¤½°Ê²¼¤Î¤è¤¦¤Ç¤¹¡£(¿ä¬¤Ç¤¹)

			­¡ abs()¤Î°ú¿ô¤ò¡¢´Ø¿ô¤ÎºÇ½é¤ÎÊý¤Ç´û¤Ë»ÈÍѤ·¤Æ¤¤¤Æ¡¢¥ì¥¸¥¹¥¿¤Ë¥í¡¼¥ÉºÑ¤ß¤Ç¤¢¤ë¡£
			­¢ abs()¤ÎľÁ°¤Ç¡¢abs()¤Î°ú¿ô°Ê³°¤ÎÊÑ¿ô¤ò¡¢0¤ÈÈæ³Ó¤¹¤ë½èÍý¤ò¹Ô¤Ã¤Æ¤¤¤ë¡£

		¾å¤Î¥µ¥ó¥×¥ë¥×¥í¥°¥é¥à¤Î¾ì¹ç¡¢test()¤ÎÃæ¤Î¡Öx <<= 1;¡×¤¬­¡¤ËÁêÅö¤·¡¢¡Öif(y) {¡×¤¬­¢¤ËÁêÅö¤·¤Þ¤¹¡£

		¤É¤¦¤ä¤égcc33¤Ï¡¢¡Öabs()¤Î°ú¿ô¤ò0¤ÈÈæ³Ó¤¹¤ë½èÍý¡×¤ò¡¢­¢¤ÎÈæ³Ó½èÍý¤È(´Ö°ã¤Ã¤Æ)¤Þ¤È¤á¤ÆºÇŬ²½¤·¤Æ¤·¤Þ¤¦¥Ð¥°¤¬¤¢¤ë¤è¤¦¤Ç¤¹¡£
		gcc33¤ÎÆâÉô½èÍýŪ¤Ë¤Ï¡¢2013ǯ7·î30Æü¤ÎP/ECE¸¦µæµ­Ï¿¡¢¡Ögcc33 ¾ò·ï±é»»»Ò¤ÎºÇŬ²½¥Ð¥°¡×¤ÇÄ´ºº¤·¤¿·ï¤È¡¢Æ±¤¸¤Ç¤Ï¤Ê¤¤¤«¤È»×¤¤¤Þ¤¹¡£
		abs()¤¬ÁȤ߹þ¤ß´Ø¿ô¤È¤·¤Æ¥¤¥ó¥é¥¤¥óŸ³«¤µ¤ì¤¿¸å¡¢¡Ögcc33 ¾ò·ï±é»»»Ò¤ÎºÇŬ²½¥Ð¥°¡×¤ÈƱ¤¸¡¢´Ö°ã¤Ã¤¿ºÇŬ²½¤¬¹Ô¤ï¤ì¤Æ¤¤¤ë¤Î¤À¤È»×¤¤¤Þ¤¹¡£

	¢£¥Ð¥°¤ò²óÈò¤¹¤ëÊýË¡

		gcc33¤¬abs()¤òÁȤ߹þ¤ß´Ø¿ô¤È¤·¤Æ¥¤¥ó¥é¥¤¥óŸ³«¤·¤Ê¤¤¤è¤¦¤Ë¡¢¥Þ¥¯¥íÄêµÁ¤ÇÃÖ¤­´¹¤¨¤ë»ö¤Ë¤·¤Þ¤·¤¿¡£
		¤É¤Î¤è¤¦¤ËÃÖ¤­´¹¤¨¤ë¤ÈÀµ¤·¤¤Æ°ºî¤Ë¤Ê¤ë¤«¡¦¸úΨ¤ÎÎɤ¤¥³¡¼¥É¤Ë¤Ê¤ë¤«¤ò¡¢¸¡¾Ú¤·¤Æ¸«¤Þ¤·¤¿¡£

		¡ßÀµ¤·¤¯¤Ê¤¤ÃÖ¤­´¹¤¨

			¤Þ¤º¡¢ÁÇľ¤ÊÈæ³Ó½èÍý¤ÇÃÖ¤­´¹¤¨¤Æ¤ß¤Þ¤·¤¿¡£

			¢¢absbug2/absbug2.c
			¨¢
			¨¢	#define abs(x) ({				\
			¨¢		int __x__ = (x);			\
			¨¢		if(__x__ < 0) { __x__ = -__x__; }	\
			¨¢		__x__; })
			¨¢

			¤·¤«¤·¤³¤ì¤Ç¤Ï¡¢abs()¤Î·ë²Ì¤¬´Ö°ã¤Ã¤¿¤Þ¤Þ¤Ë¤Ê¤ê¤Þ¤·¤¿¡£

			¨¢
			¨¢	x = 5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 10¡×(Àµ¤·¤¤)
			¨¢	x = -5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -10¡×(Àµ¤·¤¤)
			¨¢	x = 10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢	x = -10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -20¡×(¸í¤ê)
			¨¢

			¥¢¥»¥ó¥Ö¥é¥³¡¼¥É¤ò¸«¤Æ¸«¤ë¤È:

			¢¢absbug2/absbug2.ps
			¨¢
			¨¢	test:
			¨¢			xld.w		%r10, [x]		;//%r10 := x
			¨¢			ld.w		%r11, %r10		;//%r11 := x
			¨¢			sll		%r11, 1			;//%r11 := x <<= 1
			¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢			xld.w		%r10, [y]		;//%r10 := y
			¨¢			cmp		%r10, 0			;//if(y) {
			¨¢			jreq		__L2			;//  
			¨¢			ld.w		%r10, %r11		;//  %r10 := x			¨¤
			¨¢			jrge		__L1			;//  if(???) {	¢«¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¢¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¥Ð¥°¤Î¤Þ¤Þ!!
			¨¢			not		%r10, %r10		;//    %r10 := ~x		¨§¤³¤ÎÈϰϤ¬abs(x)ÁêÅö
			¨¢			add		%r10, 1			;//    %r10 := ~x + 1 = -x	¨¢
			¨¢	__L1:							;//  }				¨¥
			¨¢			cmp		%r10, 14		;//  if(abs(x) > 14)
			¨¢			jrle		__L2			;//    
			¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
			¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢	__L2:							;//} }
			¨¢			ret					;//
			¨¢

			ºÇ½é¤Î¥µ¥ó¥×¥ë¥×¥í¥°¥é¥à¤È¡¢Á´¤¯Æ±¤¸¥¢¥»¥ó¥Ö¥é¥³¡¼¥É¤¬À¸À®¤µ¤ì¤Æ¤¤¤Þ¤¹¡£
			ÁÇľ¤ÊÈæ³Ó½èÍý¤Ç¤Ï¡¢¡Ögcc33 ¾ò·ï±é»»»Ò¤ÎºÇŬ²½¥Ð¥°¡×¤ÈƱ¤¸ºÇŬ²½¥Ð¥°¤¬À¸¤¸¤Æ¡¢¥Ð¥°²óÈò¤Ë¤Ê¤é¤Ê¤¤¤è¤¦¤Ç¤¹¡£

			¢¨¤Á¤Ê¤ß¤Ë¤³¤Î·ë²Ì¤«¤é¿ä¬¤¹¤ë¤È¡¢2¤Ä¤ÎÊÑ¿ô¤ËÂФ·¤Æ0¤È¤ÎÈæ³Ó½èÍý¤òϢ³¤·¤Æ¹Ô¤¦¤È¡¢abs()°Ê³°¤Ç¤â¥Ð¥°¤¬¸²ºß²½¤¹¤ë²ÄǽÀ­¤¬¤¢¤ê¤½¤¦¤Ç¤¹¡£
			¢¨º£²ó¤ÎËÜÂ꤫¤é¤Ï³°¤ì¤ë¤Þ¤¹¤¬¡¢·ë¹½Éݤ¤¤Ç¤¹¡¦¡¦¡¦º£¸å¡¢Í×Ä´ºº¤Ç¤¹¡£

		¡ßÀµ¤·¤¯¤Ê¤¤ÃÖ¤­´¹¤¨

			¼¡¤Ë¡¢Èæ³Ó±é»»»Ò¤ò»È¤Ã¤ÆÃÖ¤­´¹¤¨¤Æ¸«¤Þ¤·¤¿¡£

			¢¢absbug3/absbug3.c

			¨¢
			¨¢	#define abs(x) ({			\
			¨¢		int __x__ = (x);		\
			¨¢		(__x__ >= 0) ? x : -__x__; })
			¨¢

			¤·¤«¤·¤³¤ì¤Ç¤â¡¢abs()¤Î·ë²Ì¤¬´Ö°ã¤Ã¤¿¤Þ¤Þ¤Ë¤Ê¤ê¤Þ¤·¤¿¡£

			¢¢absbug3/absbug3.ps
			¨¢
			¨¢	test:
			¨¢			xld.w		%r10, [x]		;//%r10 := x
			¨¢			ld.w		%r11, %r10		;//%r11 := x
			¨¢			sll		%r11, 1			;//%r11 := x <<= 1
			¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢			xld.w		%r10, [y]		;//%r10 := y
			¨¢			cmp		%r10, 0			;//if(y) {
			¨¢			jreq		__L2			;//  
			¨¢			ld.w		%r10, %r11		;//  %r10 := x			¨¤
			¨¢			jrge		__L1			;//  if(???) {	¢«¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¢¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¨¡¥Ð¥°¤Î¤Þ¤Þ!!
			¨¢			not		%r10, %r10		;//    %r10 := ~x		¨§¤³¤ÎÈϰϤ¬abs(x)ÁêÅö
			¨¢			add		%r10, 1			;//    %r10 := ~x + 1 = -x	¨¢
			¨¢	__L1:							;//  }				¨¥
			¨¢			cmp		%r10, 14		;//  if(abs(x) > 14)
			¨¢			jrle		__L2			;//    
			¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
			¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢	__L2:							;//} }
			¨¢			ret					;//
			¨¢

			ºÇ½é¤Î¥µ¥ó¥×¥ë¥×¥í¥°¥é¥à¤È¡¢Á´¤¯Æ±¤¸¥¢¥»¥ó¥Ö¥é¥³¡¼¥É¤¬À¸À®¤µ¤ì¤Æ¤¤¤Þ¤¹¡£
			¤È¤¤¤¦¤ï¤±¤Ç¡¢¤³¤ÎÊýË¡¤â¡ß¤Ç¤¹¡£

		¡ßÀµ¤·¤¯¤Ê¤¤ÃÖ¤­´¹¤¨

			¼¡¤Ë¡¢Èæ³Ó±é»»»Ò¤Ç¡¢GCC³ÈÄ¥µ¡Ç½¤ò»È¤Ã¤ÆÃÖ¤­´¹¤¨¤Æ¸«¤Þ¤·¤¿¡£

			¢¢absbug4/absbug4.c

			¨¢
			¨¢	#define abs(x) ({			\
			¨¢		int __x__ = (x);		\
			¨¢		(__x__ >= 0) ? : -__x__; })
			¨¢

			2013ǯ7·î30Æü¤Î¡Ögcc33 ¾ò·ï±é»»»Ò¤ÎºÇŬ²½¥Ð¥°¡×¤Î»þ¤Ï¡¢GCC³ÈÄ¥µ¡Ç½¤ò»È¤¦¤È¥Ð¥°¤¬²óÈò¤Ç¤­¤¿¤Î¤Ç¡¢¤³¤ÎÊýË¡¤ÇÂç¾æÉפ«¤È»×¤Ã¤¿¤Î¤Ç¤¹¤¬¡¢
			¤·¤«¤·»î¤·¤Æ¤ß¤ë¤È¡¢abs()¤Î·ë²Ì¤¬´Ö°ã¤Ã¤¿·ë²Ì¤Ë¤Ê¤ê¤Þ¤·¤¿¡£

			¨¢
			¨¢	x = 5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 10¡×(Àµ¤·¤¤)
			¨¢	x = -5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -10¡×(Àµ¤·¤¤)
			¨¢	x = 10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 20¡×(¸í¤ê)
			¨¢	x = -10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢

			Àè¤Û¤É¤Þ¤Ç¤Ï¡¢¥Þ¥¤¥Ê¥¹ÃͤËÂФ¹¤ëabs()¤¬´Ö°ã¤Ã¤Æ¤¤¤Æ¥×¥é¥¹ÃͤËÂФ¹¤ëabs()¤ÏÀµ¤·¤«¤Ã¤¿¤Î¤Ç¤¹¤¬¡¢º£²ó¤ÏµÕ¤Ë¤Ê¤Ã¤Æ¤¤¤Þ¤¹¡£
			¥¢¥»¥ó¥Ö¥é¥³¡¼¥É¤ò¸«¤Æ¸«¤ë¤È:

			¢¢absbug4/absbug4.ps
			¨¢
			¨¢	test:
			¨¢			xld.w		%r10, [x]		;//%r10 := x
			¨¢			ld.w		%r11, %r10		;//%r11 := x
			¨¢			sll		%r11, 1			;//%r11 := x <<= 1
			¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢			xld.w		%r10, [y]		;//%r10 := y
			¨¢			cmp		%r10, 0			;//if(y) {
			¨¢			jreq		__L2			;//  
			¨¢			not		%r10, %r11		;//  %r10 := ~x
			¨¢			xsrl		%r10, 31		;//  %r10 := ~x >> 31		x¤¬¥×¥é¥¹¤Ê¤é¤Ð1,x¤¬¥Þ¥¤¥Ê¥¹¤Ê¤é¤Ð0¤Ë¤Ê¤ë¡£	¢«0¤ÈÈæ³Ó¤·¤ÆȽÄꤹ¤ì¤Ð1Ì¿Îá¤ÇºÑ¤à¤Î¤Ë¡¢4Ì¿Îá»È¤Ã¤ÆºÇ¾å°Ì¥Ó¥Ã¥È¤ò¥·¥Õ¥È¤¹¤ë¤È¤¤¤¦ÌµÂÌ!!
			¨¢			jrne		__L1			;//  if(!(~x >> 31)) {		¨¡¨¤
			¨¢			not		%r10, %r11		;//    %r10 := ~x		¡¡¨¢if¤ÎÃæ¤òÄ̤ä¿»þ(x¤¬¥Þ¥¤¥Ê¥¹¤Î»þ)¤Ï¡¢%r10=abs(x)¤Ë¤Ê¤ë¤¬¡¢
			¨¢			add		%r10, 1			;//    %r10 := ~x + 1 = -x	¡¡¨¢if¤ÎÃæ¤òÄ̤é¤Ê¤«¤Ã¤¿»þ(x¤¬¥×¥é¥¹¤Î»þ)¤Ï¡¢%r10=(~x>>31)¤Ë¤Ê¤ë¡£	¢«¤¢¤é¤¿¤Ê¥Ð¥°!!
			¨¢	__L1:							;//  }				¢«¨¥
			¨¢			cmp		%r10, 14		;//  if(??? > 14) {
			¨¢			jrle		__L2			;//    
			¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
			¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢	__L2:							;//} }
			¨¢			ret					;//
			¨¢

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			¢¢absbug5/absbug5.c
			¨¢
			¨¢	#define abs(x) ({					\
			¨¢		int __x__ = (x);				\
			¨¢		asm /*volatile*/ (				\
			¨¢			"cmp  %0, 0  \n"			\
			¨¢			"jrge 3      \n"			\
			¨¢			" not %0, %0 \n"			\
			¨¢			" add %0, 1  \n"			\
			¨¢			: "=r"(__x__) : "0"(__x__) : "cc");	\
			¨¢		__x__; })
			¨¢

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			¨¢
			¨¢	x = 5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 10¡×(Àµ¤·¤¤)
			¨¢	x = -5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -10¡×(Àµ¤·¤¤)
			¨¢	x = 10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢	x = -10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢

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			¨¢
			¨¢	test:
			¨¢			xld.w		%r10, [x]		;//%r10 := x
			¨¢			ld.w		%r11, %r10		;//%r11 := x
			¨¢			sll		%r11, 1			;//%r11 := x <<= 1
			¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢			xld.w		%r10, [y]		;//%r10 := y
			¨¢			cmp		%r10, 0			;//if(y) {
			¨¢			jreq		__L1			;//  
			¨¢			ld.w		%r10, %r11		;//  %r10 := x
			¨¢			cmp		%r10, 0			;//  if(x < 0) {		¨¤
			¨¢			jrge		3			;//    				¨§¥¢¥»¥ó¥Ö¥é¤ÇÃÖ¤­´¹¤¨¤¿ÈÏ°Ï
			¨¢			 not		%r10, %r10		;//    %r10 := ~x		¨¢
			¨¢			 add		%r10, 1			;//    %r10 := ~x + 1 = -x }	¨¥
			¨¢			cmp		%r10, 14		;//  if(abs(x) > 14) {
			¨¢			jrle		__L1			;//    
			¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
			¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢	__L1:							;//}
			¨¢			ret
			¨¢

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		¢¤Àµ¤·¤¤ÃÖ¤­´¹¤¨(ÊÌver)¡£·ë²Ì¤ÏÀµ¤·¤¤¤±¤ì¤É¸úΨ¤¬°­¤¤¡£

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			¨¢
			¨¢	int t = x >> 31;
			¨¢	return (x ^ t) - t;
			¨¢

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			°ì±þ¡¢»î¤·¤Æ¸«¤ë»ö¤Ë¤·¤Þ¤·¤¿¡£

			¢¢absbug6/absbug6.c
			¨¢
			¨¢	#define abs(x) ({						\
			¨¢		int __x__ = (x);					\
			¨¢		asm /*volatile*/ (					\
			¨¢			"ld.w %%r9, %0   \n"				\
			¨¢			"xsra %%r9, 31   \n"				\	¢«¨¡¨¡4Ì¿Îá¤ËŸ³«¤µ¤ì¤Þ¤¹¡£
			¨¢			"xor  %0,   %%r9 \n"				\
			¨¢			"sub  %0,   %%r9 \n"				\
			¨¢			: "=r"(__x__) : "0"(__x__) : "cc","%r9");	\
			¨¢		__x__; })
			¨¢

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			¨¢
			¨¢	x = 5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 10¡×(Àµ¤·¤¤)
			¨¢	x = -5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -10¡×(Àµ¤·¤¤)
			¨¢	x = 10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢	x = -10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢

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			¢¢absbug6/absbug6.ps
			¨¢
			¨¢	test:
			¨¢			xld.w		%r10, [x]		;//%r10 := x
			¨¢			ld.w		%r11, %r10		;//%r11 := x
			¨¢			sll		%r11, 1			;//%r11 := x <<= 1
			¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢			xld.w		%r10, [y]		;//%r10 := y
			¨¢			cmp		%r10, 0			;//if(y) {
			¨¢			jreq		__L1			;//  
			¨¢			ld.w		%r10, %r11		;//  %r10 := x
			¨¢			ld.w		%r9, %r10		;//  %r9  :=     x			¨¤
			¨¢			sra		%r9, 8			;//  %r9  :=     x >>  8		¨¢
			¨¢			sra		%r9, 8			;//  %r9  :=     x >> 16		¨¢
			¨¢			sra		%r9, 8			;//  %r9  :=     x >> 24		¨§¥¢¥»¥ó¥Ö¥é¤ÇÃÖ¤­´¹¤¨¤¿ÈÏ°Ï
			¨¢			sra		%r9, 7			;//  %r9  := t = x >> 31		¨¢
			¨¢			xor		%r10, %r9		;//  %r10 :=  x ^ t			¨¢
			¨¢			sub		%r10, %r9		;//  %r10 := (x ^ t) - t = abs(x)	¨¥
			¨¢			cmp		%r10, 14		;//  if(abs(x) > 14) {
			¨¢			jrle		__L1			;//    
			¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
			¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢	__L1:							;//}
			¨¢			ret
			¨¢

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		¢¤Àµ¤·¤¤ÃÖ¤­´¹¤¨(ÊÌver)¡£·ë²Ì¤ÏÀµ¤·¤¤¤±¤ì¤É¸úΨ¤¬°­¤¤¡£

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			¢¢absbug7/absbug7.c
			¨¢
			¨¢	#define abs(x) ({						\
			¨¢		int __x__ = (x);					\
			¨¢		asm /*volatile*/ (					\
			¨¢			"swap %%r9, %0   \n"				\
			¨¢			"ld.b %%r9, %%r9 \n"				\
			¨¢			"sra  %%r9, 7    \n"				\
			¨¢			"xor  %0,   %%r9 \n"				\
			¨¢			"sub  %0,   %%r9 \n"				\
			¨¢			: "=r"(__x__) : "0"(__x__) : "cc","%r9");	\
			¨¢		__x__; })
			¨¢

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			¨¢
			¨¢	x = 5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 10¡×(Àµ¤·¤¤)
			¨¢	x = -5;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = -10¡×(Àµ¤·¤¤)
			¨¢	x = 10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢	x = -10;
			¨¢	test();
			¨¢	pceFontPrintf("x = %d\n", x);	//¢Í¡Öx = 0¡×(Àµ¤·¤¤)
			¨¢

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			¢¢absbug7/absbug7.ps
			¨¢
			¨¢	test:
			¨¢			xld.w		%r10, [x]		;//%r10 := x
			¨¢			ld.w		%r11, %r10		;//%r11 := x
			¨¢			xsll		%r11, 1			;//%r11 := x <<= 1
			¨¢			xld.w		[x], %r11		;//x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢			xld.w		%r10, [y]		;//%r10 := y
			¨¢			cmp		%r10, 0			;//if(y) {
			¨¢			jreq		__L1			;//  
			¨¢			ld.w		%r10, %r11		;//  %r10     := x
			¨¢			swap		%r9, %r10		;//  %r9[7:0] := x[31:24]		¨¤
			¨¢			ld.b		%r9, %r9		;//  %r9      := x[31:24] Éä¹æ³ÈÄ¥	¨¢
			¨¢			sra		%r9, 7			;//  %r9      := x[31] = t		¨§¥¢¥»¥ó¥Ö¥é¤ÇÃÖ¤­´¹¤¨¤¿ÈÏ°Ï
			¨¢			xor		%r10, %r9		;//  %r10     :=  x ^ t			¨¢
			¨¢			sub		%r10, %r9		;//  %r10     := (x ^ t) - t = abs(x)	¨¥
			¨¢			cmp		%r10, 14		;//  if(abs(x) > 14) {
			¨¢			jrle		__L1			;//    
			¨¢			ld.w		%r12, 0			;//    %r12 := x = 0
			¨¢			xld.w		[x], %r12		;//    x¤ò¥á¥â¥ê¤Ë³ÊǼ¤¹¤ë¡£
			¨¢	__L1:							;//}
			¨¢			ret
			¨¢

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	¢£¤Þ¤È¤á

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			¨¢
			¨¢	#define abs(x) ({					\
			¨¢		int __x__ = (x);				\
			¨¢		asm /*volatile*/ (				\
			¨¢			"cmp  %0, 0  \n"			\
			¨¢			"jrge 3      \n"			\
			¨¢			" not %0, %0 \n"			\
			¨¢			" add %0, 1  \n"			\
			¨¢			: "=r"(__x__) : "0"(__x__) : "cc");	\
			¨¢		__x__; })
			¨¢	#define labs(x) abs(x)		¢«¨¡¨¡¤³¤ì¤òÄɲÃ
			¨¢

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		º£²ó»ÈÍѤ·¤¿¸¡¾Ú¥×¥í¥°¥é¥à°ì¼°¤Î¡¢¥À¥¦¥ó¥í¡¼¥É¤Ï¤³¤Á¤é¤Ç¤¹:
			http://www.piece-me.org/piece-lab/absbug/absbug-src.zip

* Wed Jan 21 21:03:25 JST 2015 Naoyuki Sawa
- P/ECE¤Îsize_t¤Ïunsigned¡£unsigned long¤Ç¤Ï¤Ê¤¤¡£

	size_t¤Î·¿¤Ï½èÍý·Ï°Í¸¤Ç¤¹¡£ÂçÄñ¤Î32¥Ó¥Ã¥È´Ä¶­¤Ç¤Ï¡¢unsigned,Ëô¤Ï,unsigned long¤ÈÄêµÁ¤µ¤ì¤Æ¤¤¤Þ¤¹¡£
	unsigned¤Ç¤âunsigned long¤Ç¤â»ÈÍѾå¤Î°ã¤¤¤Ï̵¤¯¡¢¤É¤Á¤é¤Ç¤¢¤ë¤«¤òµ¤¤Ë¤¹¤ë»ö¤Ï¤¢¤Þ¤ê̵¤¤¤Ç¤¹¡£
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		<Îã1>
		¨¢#include <stdio.h>
		¨¢#include <stddef.h>
		¨¢extern int memcmp(const void* x, const void* y, size_t n);
		¨¢int test1(const char* x, const char* y, size_t n) {
		¨¢	return memcmp(x, y, n);
		¨¢}

		<Îã2>
		¨¢#include <stddef.h>
		¨¢#include <stdio.h>
		¨¢extern int memcmp(const void* x, const void* y, size_t n);
		¨¢int test1(const char* x, const char* y, size_t n) {
		¨¢	return memcmp(x, y, n);
		¨¢}

	<Îã1>¤Î¥½¡¼¥¹¤ò¥³¥ó¥Ñ¥¤¥ë¤¹¤ë¤È°Ê²¼¤Î·Ù¹ð¤¬½Ð¤Þ¤¹¡£

		warning: conflicting types for built-in function `memcmp'

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	stdio.h¤Èstddef.h¤òÈæ³Ó¤·¤¿¤È¤³¤í¡¢size_t¤ÎÄêµÁ¤¬°ã¤Ã¤Æ¤¤¤ë»ö¤Ëµ¤ÉÕ¤­¤Þ¤·¤¿¡£

		¢¢\usr\PIECE\include\stdio.h
		¨¢¡Á
		¨¢#ifndef _SIZE_T
		¨¢#define _SIZE_T
		¨¢typedef unsigned long   size_t;         /* size of type */
		¨¢#endif
		¨¢¡Á

		¢¢\usr\PIECE\include\stddef.h
		¨¢¡Á
		¨¢#ifndef _SIZE_T
		¨¢#define _SIZE_T
		¨¢#ifdef __STDC__
		¨¢	typedef TYPEOF(sizeof(0)) size_t;
		¨¢#else
		¨¢	/* compiled with "-traditional" switch */
		¨¢	typedef unsigned size_t;
		¨¢#endif
		¨¢#endif
		¨¢¡Á

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