mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-07-03 09:48:29 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

Introduce cosmo_futex_wait and cosmo_futex_wake

Browse source 
Cosmopolitan Futexes are now exposed as a public API.
This commit is contained in:
Justine Tunney 2024-11-22 11:08:29 -08:00
parent 729f7045e3
commit 9ddbfd921e
No known key found for this signature in database
GPG key ID: BE714B4575D6E328
66 changed files with 886 additions and 917 deletions
Download patch file Download diff file Expand all files Collapse all files

131
libc/intrin/tailcontext.S Normal file
View file

@ -0,0 +1,131 @@
/*-*- mode:unix-assembly; indent-tabs-mode:t; tab-width:8; coding:utf-8 -*-│
│ vi: set noet ft=asm ts=8 sw=8 fenc=utf-8 :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2022 Justine Alexandra Roberts Tunney │
│ │
│ Permission to use, copy, modify, and/or distribute this software for │
│ any purpose with or without fee is hereby granted, provided that the │
│ above copyright notice and this permission notice appear in all copies. │
│ │
│ THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL │
│ WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED │
│ WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE │
│ AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL │
│ DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR │
│ PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER │
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/macros.h"
// tailed called by setcontext() implementation
__tailcontext:
#ifdef __x86_64__
lea 608(%rdi),%rax
movaps -0x80(%rax),%xmm0
movaps -0x70(%rax),%xmm1
movaps -0x60(%rax),%xmm2
movaps -0x50(%rax),%xmm3
movaps -0x40(%rax),%xmm4
movaps -0x30(%rax),%xmm5
movaps -0x20(%rax),%xmm6
movaps -0x10(%rax),%xmm7
movaps 0x00(%rax),%xmm8
movaps 0x10(%rax),%xmm9
movaps 0x20(%rax),%xmm10
movaps 0x30(%rax),%xmm11
movaps 0x40(%rax),%xmm12
movaps 0x50(%rax),%xmm13
movaps 0x60(%rax),%xmm14
movaps 0x70(%rax),%xmm15
lea 80(%rdi),%rax
mov -40(%rax),%r8
mov -32(%rax),%r9
mov -24(%rax),%r10
mov -16(%rax),%r11
mov -8(%rax),%r12
mov 0(%rax),%r13
mov 8(%rax),%r14
mov 16(%rax),%r15
mov 32(%rax),%rsi
mov 40(%rax),%rbp
mov 48(%rax),%rbx
mov 56(%rax),%rdx
mov 72(%rax),%rcx
mov 80(%rax),%rsp
push 88(%rax)
mov 24(%rax),%rdi
xor %eax,%eax
ret
#elif defined(__aarch64__)
#define REGS(i) 184+i*8
/*void setfpsimd(const ucontext_t *uc) {
struct fpsimd_context *fp;
fp = (struct fpsimd_context *)uc->uc_mcontext.__reserved;
if (fp[0].head.magic == FPSIMD_MAGIC) {
asm("msr\tfpsr,%0" ::"r"(fp->fpsr));
asm("msr\tfpcr,%0" ::"r"(fp->fpcr));
asm("ldp\tq0,q1,%0" ::"m"(fp->vregs[0]));
asm("ldp\tq2,q3,%0" ::"m"(fp->vregs[2]));
asm("ldp\tq4,q5,%0" ::"m"(fp->vregs[4]));
asm("ldp\tq6,q7,%0" ::"m"(fp->vregs[6]));
asm("ldp\tq8,q9,%0" ::"m"(fp->vregs[8]));
asm("ldp\tq10,q11,%0" ::"m"(fp->vregs[10]));
asm("ldp\tq12,q13,%0" ::"m"(fp->vregs[12]));
asm("ldp\tq14,q15,%0" ::"m"(fp->vregs[14]));
}
}*/
ldr w14,[x0,464]
add x15,x0,464
mov w13,0x8001
movk w13,0x4650,lsl 16
cmp w14,w13
bne 1f
ldr w13,[x15,8]
msr fpsr,x13
ldr w13,[x15,12]
msr fpcr,x13
ldp q0,q1,[x15,16]
ldp q2,q3,[x15,48]
ldp q4,q5,[x15,80]
ldp q6,q7,[x15,112]
ldp q8,q9,[x15,144]
ldp q10,q11,[x15,176]
ldp q12,q13,[x15,208]
ldp q14,q15,[x15,240]
1:
// x16 is clobbered
// x18 belongs to apple
// all other registers are restored
ldp x1,x16,[x0,REGS(31)] // sp, pc
mov sp,x1
ldr x30,[x0,REGS(30)]
ldp x28,x29,[x0,REGS(28)]
ldp x26,x27,[x0,REGS(26)]
ldp x24,x25,[x0,REGS(24)]
ldp x22,x23,[x0,REGS(22)]
ldp x20,x21,[x0,REGS(20)]
ldr x19,[x0,REGS(19)]
ldr x17,[x0,REGS(17)]
ldp x14,x15,[x0,REGS(14)]
ldp x12,x13,[x0,REGS(12)]
ldp x10,x11,[x0,REGS(10)]
ldp x8,x9,[x0,REGS(8)]
ldp x6,x7,[x0,REGS(6)]
ldp x4,x5,[x0,REGS(4)]
ldp x2,x3,[x0,REGS(2)]
ldp x0,x1,[x0,REGS(0)]
br x16
#else
#error "unsupported architecture"
#endif
.endfn __tailcontext,globl