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This commit is contained in:
twinaphex 2015-01-12 15:06:29 +01:00
parent d905d77ef7
commit bf4dd752de
1 changed files with 38 additions and 0 deletions
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38
libretro-sdk/libco/amd64.c
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@ -9,13 +9,19 @@
#include <assert.h>
#include <stdlib.h>
#if defined(__GNUC__) && !defined(_WIN32)
#define CO_USE_INLINE_ASM
#endif
#ifdef __cplusplus
extern "C" {
#endif
static thread_local long long co_active_buffer[64];
static thread_local cothread_t co_active_handle = 0;
#ifndef CO_USE_INLINE_ASM
static void (*co_swap)(cothread_t, cothread_t) = 0;
#endif
#ifdef _WIN32
//ABI: Win64
@ -76,6 +82,7 @@ void co_init(void)
}
#else
//ABI: SystemV
#ifndef CO_USE_INLINE_ASM
static unsigned char co_swap_function[] = {
0x48, 0x89, 0x26, /* mov [rsi],rsp */
0x48, 0x8b, 0x27, /* mov rsp,[rdi] */
@ -105,6 +112,9 @@ void co_init(void)
unsigned long long size = (addr - base) + sizeof(co_swap_function);
mprotect((void*)base, size, PROT_READ | PROT_WRITE | PROT_EXEC);
}
#else
void co_init(void) {}
#endif
#endif
static void crash(void)
@ -123,11 +133,13 @@ cothread_t co_create(unsigned int size, void (*entrypoint)(void))
{
cothread_t handle;
#ifndef CO_USE_INLINE_ASM
if(!co_swap)
{
co_init();
co_swap = (void (*)(cothread_t, cothread_t))co_swap_function;
}
#endif
if (!co_active_handle)
co_active_handle = &co_active_buffer;
@ -150,11 +162,37 @@ void co_delete(cothread_t handle)
free(handle);
}
#ifndef CO_USE_INLINE_ASM
void co_switch(cothread_t handle)
{
register cothread_t co_previous_handle = co_active_handle;
co_swap(co_active_handle = handle, co_previous_handle);
}
#else
__asm__(
".intel_syntax noprefix \n"
".globl co_switch \n"
"co_switch: \n"
"mov rsi, co_active_handle[rip]\n"
"mov [rsi],rsp \n"
"mov [rsi+0x08],rbp \n"
"mov [rsi+0x10],rbx \n"
"mov [rsi+0x18],r12 \n"
"mov [rsi+0x20],r13 \n"
"mov [rsi+0x28],r14 \n"
"mov [rsi+0x30],r15 \n"
"mov co_active_handle[rip], rdi\n"
"mov rsp,[rdi] \n"
"mov rbp,[rdi+0x08] \n"
"mov rbx,[rdi+0x10] \n"
"mov r12,[rdi+0x18] \n"
"mov r13,[rdi+0x20] \n"
"mov r14,[rdi+0x28] \n"
"mov r15,[rdi+0x30] \n"
"ret \n"
".att_syntax \n"
);
#endif
#ifdef __cplusplus
}