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/armeabi.c | 95 ---------------------------------------------------------
 1 file changed, 95 deletions(-)
 delete mode 100644 libco/armeabi.c

(limited to 'libco/armeabi.c')

diff --git a/libco/armeabi.c b/libco/armeabi.c
deleted file mode 100644
index c9b68d0..0000000
--- a/libco/armeabi.c
+++ /dev/null
@@ -1,95 +0,0 @@
-/*
-  libco.armeabi (2013-04-05)
-  author: Themaister
-  license: public domain
-*/
-
-#define LIBCO_C
-#include <libco.h>
-#include <assert.h>
-#include <stdlib.h>
-#include <string.h>
-#include <stdint.h>
-
-#ifndef IOS
-#include <malloc.h>
-#endif
-
-#ifdef __cplusplus
-extern "C" {
-#endif
-
-static thread_local uint32_t co_active_buffer[64];
-static thread_local cothread_t co_active_handle;
-
-asm (
-      ".arm\n"
-      ".align 4\n"
-      ".globl co_switch_arm\n"
-      ".globl _co_switch_arm\n"
-      "co_switch_arm:\n"
-      "_co_switch_arm:\n"      
-      "  stmia r1!, {r4, r5, r6, r7, r8, r9, r10, r11, sp, lr}\n"
-      "  ldmia r0!, {r4, r5, r6, r7, r8, r9, r10, r11, sp, pc}\n"
-    );
-
-/* ASM */
-void co_switch_arm(cothread_t handle, cothread_t current);
-
-static void crash(void)
-{
-   /* Called only if cothread_t entrypoint returns. */
-   assert(0);
-}
-
-cothread_t co_create(unsigned int size, void (*entrypoint)(void))
-{
-   size = (size + 1023) & ~1023;
-   cothread_t handle = 0;
-#if HAVE_POSIX_MEMALIGN >= 1
-   if (posix_memalign(&handle, 1024, size + 256) < 0)
-      return 0;
-#else
-   handle = memalign(1024, size + 256);
-#endif
-
-   if (!handle)
-      return handle;
-
-   uint32_t *ptr = (uint32_t*)handle;
-   /* Non-volatiles.  */
-   ptr[0] = 0; /* r4  */
-   ptr[1] = 0; /* r5  */
-   ptr[2] = 0; /* r6  */
-   ptr[3] = 0; /* r7  */
-   ptr[4] = 0; /* r8  */
-   ptr[5] = 0; /* r9  */
-   ptr[6] = 0; /* r10 */
-   ptr[7] = 0; /* r11 */
-   ptr[8] = (uintptr_t)ptr + size + 256 - 4; /* r13, stack pointer */
-   ptr[9] = (uintptr_t)entrypoint; /* r15, PC (link register r14 gets saved here). */
-   return handle;
-}
-
-cothread_t co_active(void)
-{
-   if (!co_active_handle)
-      co_active_handle = co_active_buffer;
-   return co_active_handle;
-}
-
-void co_delete(cothread_t handle)
-{
-   free(handle);
-}
-
-void co_switch(cothread_t handle)
-{
-   cothread_t co_previous_handle = co_active();
-   co_switch_arm(co_active_handle = handle, co_previous_handle);
-}
-
-#ifdef __cplusplus
-}
-#endif
-
-- 
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