gpu_neon: fix some missing ebuf updates
[pcsx_rearmed.git] / deps / libretro-common / libco / aarch64.c
CommitLineData
3719602c
PC
1/*
2 libco.aarch64 (2017-06-26)
3 author: webgeek1234
4 license: public domain
5*/
6
7#define LIBCO_C
8#include "libco.h"
9#include <assert.h>
10#include <stdlib.h>
11#include <string.h>
12#include <stdint.h>
13
14#ifndef __APPLE__
15#include <malloc.h>
16#endif
17
18#ifdef __cplusplus
19extern "C" {
20#endif
21
22static thread_local uint64_t co_active_buffer[64];
23static thread_local cothread_t co_active_handle;
24
25asm (
26 ".globl co_switch_aarch64\n"
27 ".globl _co_switch_aarch64\n"
28 "co_switch_aarch64:\n"
29 "_co_switch_aarch64:\n"
30 " stp x8, x9, [x1]\n"
31 " stp x10, x11, [x1, #16]\n"
32 " stp x12, x13, [x1, #32]\n"
33 " stp x14, x15, [x1, #48]\n"
34 " str x19, [x1, #72]\n"
35 " stp x20, x21, [x1, #80]\n"
36 " stp x22, x23, [x1, #96]\n"
37 " stp x24, x25, [x1, #112]\n"
38 " stp x26, x27, [x1, #128]\n"
39 " stp x28, x29, [x1, #144]\n"
40 " mov x16, sp\n"
41 " stp x16, x30, [x1, #160]\n"
42
43 " ldp x8, x9, [x0]\n"
44 " ldp x10, x11, [x0, #16]\n"
45 " ldp x12, x13, [x0, #32]\n"
46 " ldp x14, x15, [x0, #48]\n"
47 " ldr x19, [x0, #72]\n"
48 " ldp x20, x21, [x0, #80]\n"
49 " ldp x22, x23, [x0, #96]\n"
50 " ldp x24, x25, [x0, #112]\n"
51 " ldp x26, x27, [x0, #128]\n"
52 " ldp x28, x29, [x0, #144]\n"
53 " ldp x16, x17, [x0, #160]\n"
54 " mov sp, x16\n"
55 " br x17\n"
56 );
57
58/* ASM */
59void co_switch_aarch64(cothread_t handle, cothread_t current);
60
61static void crash(void)
62{
63 /* Called only if cothread_t entrypoint returns. */
64 assert(0);
65}
66
67cothread_t co_create(unsigned int size, void (*entrypoint)(void))
68{
69 uint64_t *ptr = NULL;
70 cothread_t handle = 0;
71 size = (size + 1023) & ~1023;
72#if HAVE_POSIX_MEMALIGN >= 1
73 if (posix_memalign(&handle, 1024, size + 512) < 0)
74 return 0;
75#else
76 handle = memalign(1024, size + 512);
77#endif
78
79 if (!handle)
80 return handle;
81
82 ptr = (uint64_t*)handle;
83 /* Non-volatiles. */
84 ptr[0] = 0; /* x8 */
85 ptr[1] = 0; /* x9 */
86 ptr[2] = 0; /* x10 */
87 ptr[3] = 0; /* x11 */
88 ptr[4] = 0; /* x12 */
89 ptr[5] = 0; /* x13 */
90 ptr[6] = 0; /* x14 */
91 ptr[7] = 0; /* x15 */
92 ptr[8] = 0; /* padding */
93 ptr[9] = 0; /* x19 */
94 ptr[10] = 0; /* x20 */
95 ptr[11] = 0; /* x21 */
96 ptr[12] = 0; /* x22 */
97 ptr[13] = 0; /* x23 */
98 ptr[14] = 0; /* x24 */
99 ptr[15] = 0; /* x25 */
100 ptr[16] = 0; /* x26 */
101 ptr[17] = 0; /* x27 */
102 ptr[18] = 0; /* x28 */
103 ptr[20] = (uintptr_t)ptr + size + 512 - 16; /* x30, stack pointer */
104 ptr[19] = ptr[20]; /* x29, frame pointer */
105 ptr[21] = (uintptr_t)entrypoint; /* PC (link register x31 gets saved here). */
106 return handle;
107}
108
109cothread_t co_active(void)
110{
111 if (!co_active_handle)
112 co_active_handle = co_active_buffer;
113 return co_active_handle;
114}
115
116void co_delete(cothread_t handle)
117{
118 free(handle);
119}
120
121void co_switch(cothread_t handle)
122{
123 cothread_t co_previous_handle = co_active();
124 co_switch_aarch64(co_active_handle = handle, co_previous_handle);
125}
126
127#ifdef __cplusplus
128}
129#endif