120 lines
2.3 KiB
C
120 lines
2.3 KiB
C
/* This small function uses all the arithmetic operators that
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libgcc1.c can handle. If you can link it, then
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you have provided replacements for all the libgcc1.c functions that
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your target machine needs. */
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#include <stddef.h>
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int foo ();
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double dfoo ();
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void discard (int);
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void ddiscard (double);
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/* We don't want __main here because that can drag in atexit (among other
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things) which won't necessarily exist yet. */
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int
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main_without__main ()
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{
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int a = foo (), b = foo ();
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unsigned int au = foo (), bu = foo ();
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float af = dfoo (), bf = dfoo ();
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double ad = dfoo (), bd = dfoo ();
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discard (a * b);
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discard (a / b);
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discard (a % b);
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discard (au / bu);
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discard (au % bu);
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discard (a >> b);
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discard (a << b);
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discard (au >> bu);
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discard (au << bu);
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ddiscard (ad + bd);
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ddiscard (ad - bd);
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ddiscard (ad * bd);
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ddiscard (ad / bd);
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ddiscard (-ad);
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ddiscard (af + bf);
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ddiscard (af - bf);
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ddiscard (af * bf);
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ddiscard (af / bf);
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ddiscard (-af);
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discard ((int) ad);
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discard ((int) af);
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ddiscard ((double) a);
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ddiscard ((float) a);
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ddiscard ((float) ad);
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discard (ad == bd);
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discard (ad < bd);
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discard (ad > bd);
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discard (ad != bd);
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discard (ad <= bd);
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discard (ad >= bd);
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discard (af == bf);
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discard (af < bf);
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discard (af > bf);
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discard (af != bf);
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discard (af <= bf);
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discard (af >= bf);
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return 0;
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}
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void
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discard (x)
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int x __attribute__((__unused__));
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{}
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void
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ddiscard (x)
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double x __attribute__((__unused__));
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{}
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int
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foo ()
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{
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static int table[] = {20, 69, 4, 12};
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static int idx;
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return table[idx++];
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}
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double
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dfoo ()
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{
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static double table[] = {20.4, 69.96, 4.4, 202.202};
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static int idx;
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return table[idx++];
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}
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/* Provide functions that some versions of the linker use to default
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the start address if -e symbol is not used, to avoid the warning
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message saying the start address is defaulted. */
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extern void start() __asm__("start");
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extern void _start() __asm__("_start");
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extern void __start() __asm__("__start");
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/* Provide functions that might be needed by soft-float emulation routines. */
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void *memcpy(void *to,
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const void *from __attribute__((__unused__)),
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size_t len __attribute__((__unused__)))
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{
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return to;
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}
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void start() {}
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void _start() {}
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void __start() {}
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void mainCRTStartup() {}
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