目前的问题是sin求错，乘法求对了。

git-svn-id: file:///svn/pmon-all/pmon-all@52 214b0138-1524-0410-9122-e5cb4b5bc56c

examples/math/Makefile

@@ -20,12 +20,12 @@ OBJDUMP		= $(CROSS_COMPILE)objdump
 SIZE		= $(CROSS_COMPILE)size
 
 hello:	hello.o
-	${CC} -G 0 -O2 -EL -mips2 -mcpu=r4000 -Ttext=0x80200000 -N -o hello hello.o -nostdlib -e main libm.a
+	${CC} -G 0 -O2 -EL -mips3 -mcpu=r4000 -Ttext=0x80200000 -N -o hello hello.o -nostdlib -e main libm.a libgcc.a
 	cp hello /tftpboot
 .S.o:
-	mipsel-linux-gcc  -G 0 -c $< -mno-abicalls -fno-pic 
+	mipsel-linux-gcc  -mips3 -G 0 -c $< -mno-abicalls -fno-pic 
 .c.o:
-	mipsel-linux-gcc  -EL -c $< -G 0 -mno-abicalls -fno-pic
+	mipsel-linux-gcc  -mips3 -EL -c $< -G 0 -mno-abicalls -fno-pic
 
 clean:
 	rm -f hello *.o

examples/math/hello.c

@@ -56,20 +56,32 @@ struct callvectors *callvec;
 
 void __gccmain(void);
 void __gccmain(void){}
-double x=1.1;
-double y=1.2;
 
+static double x=1.12;
+static double y=1.34;
+static double z;
+double sin(double x);
 int
 main(int argc, char **argv, char **env, struct callvectors *cv)
 {
 	char str[256];
 	char **ev;
 	int i;
-
 	callvec = cv;
-
+#if 0
+z=sin(x);
+printf("sin(1.12)=%d\n",(int)(z*1000));
+z=sin(x)*y;
+printf("sin(1.12)*1.34=%d\n",(int)(z*1000));
+z=x*y;
+printf("1.12*1.34=%d\n",(int)(z*1000));
 	printf("\n\nHello! This is the 'hello' program!\n\n");
 	printf("sin(y)=%d",(int)(sin(y)*1000));
+#else
+z=sin(3.14);
+printf("sin(3.14)=%d\n",(int)(z*1000));
+
+#endif
 
 	return(0);
 }