Factor out common code between x86 and x86_64

Fix #17

src/arch/x86/mod.rs

@@ -1,48 +1,33 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use void::Void;
+pub use self::common::*;
 
-use stack::Stack;
-use super::common::{push, rust_trampoline};
-
-pub const STACK_ALIGN: usize = 16;
-
-#[derive(Debug)]
-pub struct Registers {
-  esp: *mut usize
+macro_rules! init {
+  ($sp:expr, $f_ptr:expr, $tramp:expr) => {
+    asm!(include_str!("x86/init.s")
+         : "={eax}"($sp)
+         : "{eax}" ($sp),
+           "{ebx}" ($tramp),
+           "{ecx}" ($f_ptr)
+         :
+         : "volatile")
+  };
 }
 
-impl Registers {
-  #[inline]
-  pub unsafe fn new<S, F>(stack: &mut S, f: F) -> Registers
-    where S: Stack, F: FnOnce() -> Void {
-    let mut sp = stack.top() as *mut usize;
-    let f_ptr = push(&mut sp, f);
-
-    asm!(include_str!("init.s")
-          : "={eax}"(sp)
-          : "{eax}" (sp),
-            "{ebx}" (rust_trampoline::<F> as unsafe extern "C" fn(*const F) -> !),
-            "{ecx}" (f_ptr)
+macro_rules! swap {
+  ($out_spp:expr, $in_spp:expr) => {
+    asm!(include_str!("x86/swap.s")
          :
-          : "volatile");
-
-    Registers { esp: sp }
-  }
-
-  #[inline(always)]
-  pub unsafe fn swap(out_regs: *mut Registers, in_regs: *const Registers) {
-    let out_espp = &mut (*out_regs).esp;
-    let in_espp = &(*in_regs).esp;
-    asm!(include_str!("swap.s")
-          :
-          : "{eax}" (out_espp),
-            "{ebx}" (in_espp)
+         : "{eax}" ($out_spp),
+           "{ebx}" ($in_spp)
          : "eax",  "ebx",  "ecx",  "edx",  "esi",  "edi", //"ebp",  "esp",
            "mmx0", "mmx1", "mmx2", "mmx3", "mmx4", "mmx5", "mmx6", "mmx7",
            "xmm0", "xmm1", "xmm2", "xmm3", "xmm4", "xmm5", "xmm6", "xmm7",
            "cc"
-          : "volatile");
-  }
+         : "volatile")
+  };
 }
+
+#[path = "../x86_common.rs"]
+mod common;

src/arch/x86_64/mod.rs

@@ -1,43 +1,26 @@
 // This file is part of libfringe, a low-level green threading library.
 // Copyright (c) edef <edef@edef.eu>
 // See the LICENSE file included in this distribution.
-use stack::Stack;
-use void::Void;
-use super::common::{push, rust_trampoline};
+pub use self::common::*;
 
-pub const STACK_ALIGN: usize = 16;
-
-#[derive(Debug)]
-pub struct Registers {
-  rsp: *mut usize
-}
-
-impl Registers {
-  #[inline]
-  pub unsafe fn new<S, F>(stack: &mut S, f: F) -> Registers
-    where S: Stack, F: FnOnce() -> Void {
-    let mut sp = stack.top() as *mut usize;
-    let f_ptr = push(&mut sp, f);
-
-    asm!(include_str!("init.s")
-          : "={rdi}"(sp)
-          : "{rdi}" (sp),
-            "{rsi}" (rust_trampoline::<F> as unsafe extern "C" fn(*const F) -> !),
-            "{rdx}" (f_ptr)
+macro_rules! init {
+  ($sp:expr, $f_ptr:expr, $tramp:expr) => {
+    asm!(include_str!("x86_64/init.s")
+         : "={rdi}"($sp)
+         : "{rdi}" ($sp),
+           "{rsi}" ($tramp),
+           "{rdx}" ($f_ptr)
          :
          : "volatile");
-
-    Registers { rsp: sp }
+  }
 }
 
-  #[inline(always)]
-  pub unsafe fn swap(out_regs: *mut Registers, in_regs: *const Registers) {
-    let out_rspp = &mut (*out_regs).rsp;
-    let in_rspp = &(*in_regs).rsp;
-    asm!(include_str!("swap.s")
+macro_rules! swap {
+  ($out_spp:expr, $in_spp:expr) => {
+    asm!(include_str!("x86_64/swap.s")
          :
-          : "{rdi}" (out_rspp),
-            "{rsi}" (in_rspp)
+         : "{rdi}" ($out_spp)
+           "{rsi}" ($in_spp)
          : "rax",   "rbx",   "rcx",   "rdx",   "rsi",   "rdi", //"rbp",   "rsp",
            "r8",    "r9",    "r10",   "r11",   "r12",   "r13",   "r14",   "r15",
            "xmm0",  "xmm1",  "xmm2",  "xmm3",  "xmm4",  "xmm5",  "xmm6",  "xmm7",
@@ -48,3 +31,6 @@ impl Registers {
          : "volatile");
   }
 }
+
+#[path = "../x86_common.rs"]
+mod common;

src/arch/x86_common.rs

@@ -0,0 +1,35 @@
+// This file is part of libfringe, a low-level green threading library.
+// Copyright (c) 2015, edef <edef@edef.eu>
+// See the LICENSE file included in this distribution.
+use void::Void;
+
+use stack::Stack;
+use arch::common::{push, rust_trampoline};
+
+pub const STACK_ALIGN: usize = 16;
+
+#[derive(Debug)]
+pub struct Registers {
+  stack_pointer: *mut usize
+}
+
+impl Registers {
+  #[inline]
+  pub unsafe fn new<S, F>(stack: &mut S, f: F) -> Registers
+    where S: Stack, F: FnOnce() -> Void
+  {
+    let mut sp = stack.top() as *mut usize;
+    let f_ptr = push(&mut sp, f);
+
+    init!(sp, f_ptr, rust_trampoline::<F> as unsafe extern "C" fn(*const F) -> !);
+
+    Registers {
+      stack_pointer: sp,
+    }
+  }
+
+  #[inline(always)]
+  pub unsafe fn swap(out_regs: *mut Registers, in_regs: *const Registers) {
+    swap!(&mut (*out_regs).stack_pointer, &(*in_regs).stack_pointer);
+  }
+}