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Last change
on this file since 0dffe91 was
7bef8cf,
checked in by Peter A. Buhr <pabuhr@…>, 19 months ago
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start paper on llheap
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-
Property mode set to
100644
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File size:
1.6 KB
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| 1 | #include <stdio.h> |
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| 2 | |
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| 3 | typedef struct PingPong { |
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| 4 | int restart; // style 1 |
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| 5 | int N, i; |
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| 6 | const char * name; |
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| 7 | struct PingPong * partner; |
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| 8 | void * next; // style 2 |
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| 9 | } PingPong; |
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| 10 | #define PPCtor( name, N ) { 0, N, 0, name, NULL, NULL } |
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| 11 | |
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| 12 | void comain( PingPong * pp ) __attribute__(( noinline )); |
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| 13 | void comain( PingPong * pp ) { |
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| 14 | #if 0 |
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| 15 | if ( __builtin_expect(pp->next != 0, 1) ) goto *pp->next; |
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| 16 | pp->next = &&cycle; |
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| 17 | for ( ; pp->i < pp->N; pp->i += 1 ) { |
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| 18 | #ifdef PRINT |
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| 19 | printf( "%s %d\n", pp->name, pp->i ); |
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| 20 | #endif // PRINT |
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| 21 | asm( "mov %0,%%rdi" : "=m" (pp->partner) ); |
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| 22 | asm( "mov %rdi,%rax" ); |
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| 23 | #ifndef OPT |
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| 24 | #ifdef PRINT |
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| 25 | asm( "add $16, %rsp" ); |
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| 26 | #endif // PRINT |
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| 27 | asm( "popq %rbp" ); |
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| 28 | #endif // ! OPT |
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| 29 | |
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| 30 | #ifdef OPT |
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| 31 | #ifdef PRINT |
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| 32 | asm( "popq %rbx" ); |
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| 33 | #endif // PRINT |
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| 34 | #endif // OPT |
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| 35 | asm( "jmp comain" ); |
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| 36 | cycle: ; |
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| 37 | } // for |
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| 38 | #endif // 0 |
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| 39 | |
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| 40 | #if 1 |
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| 41 | static void * states[] = {&&s0, &&s1}; |
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| 42 | goto *states[pp->restart]; |
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| 43 | s0: pp->restart = 1; |
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| 44 | for ( ; pp->i < pp->N; pp->i += 1 ) { |
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| 45 | #ifdef PRINT |
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| 46 | printf( "%s %d\n", pp->name, pp->i ); |
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| 47 | #endif // PRINT |
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| 48 | asm( "mov %0,%%rdi" : "=m" (pp->partner) ); |
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| 49 | asm( "mov %rdi,%rax" ); |
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| 50 | #ifndef OPT |
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| 51 | #ifdef PRINT |
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| 52 | asm( "add $16, %rsp" ); |
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| 53 | #endif // PRINT |
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| 54 | asm( "popq %rbp" ); |
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| 55 | #endif // ! OPT |
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| 56 | |
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| 57 | #ifdef OPT |
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| 58 | #ifdef PRINT |
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| 59 | asm( "popq %rbx" ); |
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| 60 | #endif // PRINT |
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| 61 | #endif // OPT |
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| 62 | asm( "jmp comain" ); |
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| 63 | s1: ; |
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| 64 | } // for |
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| 65 | #endif // 0 |
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| 66 | } |
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| 67 | |
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| 68 | int main() { |
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| 69 | enum { N = |
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| 70 | #ifdef PRINT |
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| 71 | 5 |
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| 72 | #else |
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| 73 | 1000000000 |
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| 74 | #endif // PRINT |
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| 75 | }; |
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| 76 | PingPong ping = PPCtor( "ping", N ), pong = PPCtor( "pong", N ); |
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| 77 | ping.partner = &pong; pong.partner = &ping; |
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| 78 | comain( &ping ); |
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| 79 | } |
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| 80 | |
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| 81 | // Local Variables: // |
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| 82 | // tab-width: 4 // |
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| 83 | // compile-command: "gcc-9 -g -DPRINT PingPong.c" // |
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| 84 | // End: // |
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