From 56dc6ecb70e6fc76d32d6a7194acb273b76bfe0e Mon Sep 17 00:00:00 2001 From: David Guillen Fandos Date: Mon, 8 Mar 2021 18:44:03 +0100 Subject: Remove libco This removes libco and all the usages of it (+pthreads). Rewired all dynarecs and interpreter to return after every frame so that libretro can process events. This required to make dynarec re-entrant. Dynarecs were updated to check for new frame on every update (IRQ, cycle exhaustion, I/O write, etc). The performance impact of doing so should be minimal (and definitely outweight the libco gains). While at it, fixed small issues to get a bit more perf: arm dynarec was not idling correctly, mips was using stack when not needed, etc. Tested on PSP (mips), OGA (armv7), Linux (x86 and interpreter). Not tested on Android though. --- libco/x86.c | 117 ------------------------------------------------------------ 1 file changed, 117 deletions(-) delete mode 100644 libco/x86.c (limited to 'libco/x86.c') diff --git a/libco/x86.c b/libco/x86.c deleted file mode 100644 index ae16766..0000000 --- a/libco/x86.c +++ /dev/null @@ -1,117 +0,0 @@ -/* - libco.x86 (2009-10-12) - author: byuu - license: public domain -*/ - -#define LIBCO_C -#include -#include -#include - -#ifdef __cplusplus -extern "C" { -#endif - -#if defined(_MSC_VER) - #define fastcall __fastcall -#elif defined(__GNUC__) - #define fastcall __attribute__((fastcall)) -#else - #error "libco: please define fastcall macro" -#endif - -static thread_local long co_active_buffer[64]; -static thread_local cothread_t co_active_handle = 0; -static void (fastcall *co_swap)(cothread_t, cothread_t) = 0; - -//ABI: fastcall -static unsigned char co_swap_function[] = { - 0x89, 0x22, /* mov [edx],esp */ - 0x8b, 0x21, /* mov esp,[ecx] */ - 0x58, /* pop eax */ - 0x89, 0x6a, 0x04, /* mov [edx+0x04],ebp */ - 0x89, 0x72, 0x08, /* mov [edx+0x08],esi */ - 0x89, 0x7a, 0x0c, /* mov [edx+0x0c],edi */ - 0x89, 0x5a, 0x10, /* mov [edx+0x10],ebx */ - 0x8b, 0x69, 0x04, /* mov ebp,[ecx+0x04] */ - 0x8b, 0x71, 0x08, /* mov esi,[ecx+0x08] */ - 0x8b, 0x79, 0x0c, /* mov edi,[ecx+0x0c] */ - 0x8b, 0x59, 0x10, /* mov ebx,[ecx+0x10] */ - 0xff, 0xe0, /* jmp eax */ -}; - -#ifdef _WIN32 -#include - -void co_init(void) -{ - DWORD old_privileges; - VirtualProtect(co_swap_function, - sizeof co_swap_function, PAGE_EXECUTE_READWRITE, &old_privileges); -} -#else -#include -#include - -void co_init(void) -{ - unsigned long addr = (unsigned long)co_swap_function; - unsigned long base = addr - (addr % sysconf(_SC_PAGESIZE)); - unsigned long size = (addr - base) + sizeof co_swap_function; - mprotect((void*)base, size, PROT_READ | PROT_WRITE | PROT_EXEC); -} -#endif - -static void crash(void) -{ - assert(0); /* called only if cothread_t entrypoint returns */ -} - -cothread_t co_active(void) -{ - if(!co_active_handle) - co_active_handle = &co_active_buffer; - return co_active_handle; -} - -cothread_t co_create(unsigned int size, void (*entrypoint)(void)) -{ - cothread_t handle; - if(!co_swap) - { - co_init(); - co_swap = (void (fastcall*)(cothread_t, cothread_t))co_swap_function; - } - - if(!co_active_handle) - co_active_handle = &co_active_buffer; - - size += 256; /* allocate additional space for storage */ - size &= ~15; /* align stack to 16-byte boundary */ - - if((handle = (cothread_t)malloc(size))) - { - long *p = (long*)((char*)handle + size); /* seek to top of stack */ - *--p = (long)crash; /* crash if entrypoint returns */ - *--p = (long)entrypoint; /* start of function */ - *(long*)handle = (long)p; /* stack pointer */ - } - - return handle; -} - -void co_delete(cothread_t handle) -{ - free(handle); -} - -void co_switch(cothread_t handle) -{ - register cothread_t co_previous_handle = co_active_handle; - co_swap(co_active_handle = handle, co_previous_handle); -} - -#ifdef __cplusplus -} -#endif -- cgit v1.2.3