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call_x86.h
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call_x86.h
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/*
** This file has been pre-processed with DynASM.
** https://luajit.org/dynasm.html
** DynASM version 1.5.0, DynASM x86 version 1.4.0
** DO NOT EDIT! The original file is in "call_x86.dasc".
*/
/* vim: ts=4 sw=4 sts=4 et tw=78
* Portions copyright (c) 2015-present, Facebook, Inc. All rights reserved.
* Portions copyright (c) 2011 James R. McKaskill.
*
* This source code is licensed under the BSD-style license found in the
* LICENSE file in the root directory of this source tree. An additional grant
* of patent rights can be found in the PATENTS file in the same directory.
*/
//|.if X64
//|.arch x64
//|.else
//|.arch x86
#if DASM_VERSION != 10500
#error "Version mismatch between DynASM and included encoding engine"
#endif
//|.endif
//|.actionlist build_actionlist
static const unsigned char build_actionlist[1915] = {
139,141,233,255,139,141,233,139,149,233,255,137,132,253,36,233,255,137,132,
253,36,233,137,148,253,36,233,255,221,133,233,255,217,133,233,255,252,243,
15,126,133,233,255,252,243,15,90,133,233,255,221,156,253,36,233,255,217,156,
253,36,233,255,102,15,214,132,253,36,233,255,252,242,15,90,192,102,15,214,
132,253,36,233,255,252,242,15,90,192,102,15,126,132,253,36,233,255,85,137,
229,87,129,252,236,239,255,137,77,252,248,137,85,252,244,255,191,237,255,
199,68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,0,255,199,68,36,8,237,
199,68,36,4,252,255,252,255,252,255,252,255,137,60,36,232,251,1,0,255,199,
68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,0,199,68,36,8,237,199,68,
36,4,252,255,252,255,252,255,252,255,137,60,36,232,251,1,1,255,137,8,199,
68,36,4,252,254,252,255,252,255,252,255,137,60,36,232,251,1,2,255,199,68,
36,8,237,199,68,36,4,0,0,0,0,137,60,36,232,251,1,1,255,137,8,137,80,4,255,
137,8,255,102,15,214,0,255,217,24,255,217,88,4,255,221,24,255,221,88,8,255,
221,92,36,4,137,60,36,232,251,1,3,255,15,182,201,137,76,36,4,137,60,36,232,
251,1,4,255,15,182,201,255,15,190,201,255,137,76,36,4,137,60,36,232,251,1,
5,255,15,183,201,255,15,191,201,255,137,76,36,4,137,60,36,232,251,1,6,255,
199,68,36,12,0,0,0,0,199,68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,
7,255,199,68,36,8,237,199,68,36,4,252,254,252,255,252,255,252,255,137,60,
36,232,251,1,0,199,68,36,12,237,199,68,36,8,252,255,252,255,252,255,252,255,
199,68,36,4,252,254,252,255,252,255,252,255,137,60,36,232,251,1,8,137,68,
36,32,199,68,36,4,252,252,252,255,252,255,252,255,137,60,36,232,251,1,9,139,
68,36,32,255,199,68,36,8,237,199,68,36,4,252,254,252,255,252,255,252,255,
137,60,36,232,251,1,0,199,68,36,12,237,199,68,36,8,252,255,252,255,252,255,
252,255,199,68,36,4,252,254,252,255,252,255,252,255,137,60,36,232,251,1,10,
137,68,36,32,199,68,36,4,252,252,252,255,252,255,252,255,137,60,36,232,251,
1,9,139,68,36,32,255,199,68,36,4,252,254,252,255,252,255,252,255,137,60,36,
232,251,1,9,255,199,68,36,4,252,255,252,255,252,255,252,255,137,60,36,232,
251,1,11,255,199,68,36,4,252,255,252,255,252,255,252,255,137,60,36,232,251,
1,12,255,137,68,36,32,199,68,36,4,252,253,252,255,252,255,252,255,137,60,
36,232,251,1,9,139,68,36,32,255,199,68,36,4,252,255,252,255,252,255,252,255,
137,60,36,232,251,1,13,255,199,68,36,4,252,255,252,255,252,255,252,255,137,
60,36,232,251,1,14,255,137,68,36,32,137,84,36,36,199,68,36,4,252,253,252,
255,252,255,252,255,137,60,36,232,251,1,9,139,68,36,32,139,84,36,36,255,199,
68,36,4,252,255,252,255,252,255,252,255,137,60,36,232,251,1,15,137,68,36,
32,199,68,36,4,252,253,252,255,252,255,252,255,137,60,36,232,251,1,9,139,
68,36,32,255,199,68,36,4,252,255,252,255,252,255,252,255,137,60,36,232,251,
1,16,255,221,92,36,32,199,68,36,4,252,253,252,255,252,255,252,255,137,60,
36,232,251,1,9,221,68,36,32,255,199,68,36,4,252,255,252,255,252,255,252,255,
137,60,36,232,251,1,17,137,68,36,32,137,84,36,36,199,68,36,4,252,253,252,
255,252,255,252,255,137,60,36,232,251,1,9,139,68,36,32,139,84,36,36,255,199,
68,36,4,252,255,252,255,252,255,252,255,137,60,36,232,251,1,18,102,15,214,
68,36,32,102,15,214,76,36,40,199,68,36,4,252,253,252,255,252,255,252,255,
137,60,36,232,251,1,9,252,243,15,126,68,36,32,252,243,15,126,76,36,40,255,
139,141,233,199,68,36,8,252,255,252,255,252,255,252,255,137,124,36,4,137,
12,36,232,251,1,18,131,252,236,4,199,68,36,4,252,253,252,255,252,255,252,
255,137,60,36,232,251,1,9,255,139,125,252,252,137,252,236,93,194,236,255,
85,137,229,87,86,139,189,233,131,252,236,16,137,60,36,232,251,1,19,137,198,
129,252,248,239,255,15,141,244,248,102,184,0,0,199,68,36,4,237,137,60,36,
232,251,1,20,248,2,15,142,244,247,102,184,0,0,199,68,36,4,237,137,60,36,232,
251,1,20,255,15,141,244,247,102,184,0,0,199,68,36,4,237,137,60,36,232,251,
1,20,255,248,1,255,193,224,4,41,196,129,252,236,239,255,199,68,36,8,237,199,
68,36,4,0,0,0,0,137,60,36,232,251,1,1,131,252,236,16,255,199,68,36,12,237,
199,68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,8,255,199,68,36,12,237,
199,68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,21,255,199,68,36,12,237,
199,68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,10,255,199,68,36,4,237,
137,60,36,232,251,1,12,255,15,182,192,255,15,190,192,255,15,183,192,255,15,
191,192,255,199,68,36,4,237,137,60,36,232,251,1,12,131,252,248,0,15,149,208,
15,182,192,255,199,68,36,4,237,137,60,36,232,251,1,11,255,199,68,36,4,237,
137,60,36,232,251,1,15,255,199,68,36,4,237,137,60,36,232,251,1,13,255,199,
68,36,4,237,137,60,36,232,251,1,14,255,199,68,36,4,237,137,60,36,232,251,
1,16,255,199,68,36,4,237,137,60,36,232,251,1,18,255,252,243,15,126,193,255,
141,132,253,36,233,131,252,236,4,199,68,36,8,237,137,124,36,4,137,4,36,232,
251,1,18,255,199,68,36,4,237,137,60,36,232,251,1,17,255,199,68,36,4,237,137,
60,36,232,251,1,17,137,4,36,217,4,36,255,137,20,36,217,4,36,255,137,224,129,
192,239,137,68,36,12,137,116,36,8,199,68,36,4,237,137,60,36,232,251,1,22,
255,185,237,139,1,137,4,36,232,251,1,23,255,131,196,32,255,139,148,253,36,
233,255,139,12,36,255,129,196,239,255,232,251,1,24,131,252,236,48,255,137,
68,36,32,232,251,1,25,185,237,137,1,199,68,36,8,237,199,68,36,4,237,137,60,
36,232,251,1,1,139,76,36,32,137,8,184,1,0,0,0,139,117,252,248,139,125,252,
252,137,252,236,93,195,255,137,68,36,32,232,251,1,25,185,237,137,1,139,68,
36,32,137,68,36,4,137,60,36,232,251,1,26,184,1,0,0,0,139,117,252,248,139,
125,252,252,137,252,236,93,195,255,137,84,36,36,137,68,36,32,232,251,1,25,
185,237,137,1,199,68,36,8,237,199,68,36,4,0,0,0,0,137,60,36,232,251,1,1,139,
76,36,36,139,84,36,32,137,72,4,137,16,184,1,0,0,0,139,117,252,248,139,125,
252,252,137,252,236,93,195,255,137,68,36,32,137,84,36,36,232,251,1,25,185,
237,137,1,199,68,36,8,237,199,68,36,4,237,137,60,36,232,251,1,1,139,76,36,
32,137,8,139,76,36,36,137,72,4,184,1,0,0,0,139,117,252,248,139,125,252,252,
137,252,236,93,195,255,131,252,236,4,232,251,1,25,185,237,137,1,184,1,0,0,
0,139,117,252,248,139,125,252,252,137,252,236,93,195,255,232,251,1,25,185,
237,137,1,184,0,0,0,0,139,117,252,248,139,125,252,252,137,252,236,93,195,
255,15,182,192,137,68,36,32,232,251,1,25,185,237,137,1,139,68,36,32,137,68,
36,4,137,60,36,232,251,1,4,184,1,0,0,0,139,117,252,248,139,125,252,252,137,
252,236,93,195,255,137,68,36,32,232,251,1,25,185,237,137,1,139,68,36,32,137,
68,36,4,137,60,36,232,251,1,5,184,1,0,0,0,139,117,252,248,139,125,252,252,
137,252,236,93,195,255,137,68,36,32,232,251,1,25,185,237,137,1,139,68,36,
32,137,68,36,4,137,60,36,232,251,1,6,184,1,0,0,0,139,117,252,248,139,125,
252,252,137,252,236,93,195,255,221,92,36,4,232,251,1,25,185,237,137,1,137,
60,36,232,251,1,3,184,1,0,0,0,139,117,252,248,139,125,252,252,137,252,236,
93,195,255
};
//|.globalnames globnames
static const char *const globnames[] = {
(const char *)0
};
//|.externnames extnames
static const char *const extnames[] = {
"lua_rawgeti",
"push_cdata",
"lua_remove",
"lua_pushnumber",
"lua_pushboolean",
"push_int",
"push_uint",
"lua_callk",
"check_typed_pointer",
"lua_settop",
"check_enum",
"check_uint32",
"check_int32",
"check_uint64",
"check_int64",
"check_uintptr",
"check_double",
"check_complex_float",
"check_complex_double",
"lua_gettop",
"luaL_error",
"check_typed_cfunction",
"unpack_varargs_stack",
"SetLastError",
"FUNCTION",
"GetLastError",
"lua_pushinteger",
(const char *)0
};
//|.if not X64
//|.define RET_H, edx // for int64_t returns
//|.define RET_L, eax
//|.endif
//|.if X64
//|.define L_ARG, r12
//|.define TOP, r13
//|.else
//|.define L_ARG, rdi
//|.define TOP, rsi
//|.endif
//|.if X64WIN
//|
//|.macro call_rrrp, func, arg0, arg1, arg2, arg3
//| mov64 r9, arg3
//| mov r8, arg2
//| mov rdx, arg1
//| mov rcx, arg0
//| call func
//|.endmacro
//|.macro call_rrrr, func, arg0, arg1, arg2, arg3
//| mov r9, arg3
//| mov r8, arg2
//| mov rdx, arg1
//| mov rcx, arg0
//| call func
//|.endmacro
//|
//|.macro call_rrp, func, arg0, arg1, arg2
//| mov64 r8, arg2
//| mov rdx, arg1
//| mov rcx, arg0
//| call func
//|.endmacro
//|.macro call_rrr, func, arg0, arg1, arg2
//| mov r8, arg2
//| mov rdx, arg1
//| mov rcx, arg0
//| call func
//|.endmacro
//|
//|.macro call_rp, func, arg0, arg1
//| mov64 rdx, arg1
//| mov rcx, arg0
//| call func
//|.endmacro
//|.macro call_rr, func, arg0, arg1
//| mov rdx, arg1
//| mov rcx, arg0
//| call func
//|.endmacro
//|
//|.macro call_r, func, arg0
//| mov rcx, arg0
//| call func
//|.endmacro
//|
//|.elif X64
//|
//| // the 5 and 6 arg forms are only used on posix x64
//|.macro call_rrrrrr, func, arg0, arg1, arg2, arg3, arg4, arg5
//| mov r9, arg5
//| mov r8, arg4
//| mov rcx, arg3
//| mov rdx, arg2
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|.macro call_rrrrr, func, arg0, arg1, arg2, arg3, arg4
//| mov r8, arg4
//| mov rcx, arg3
//| mov rdx, arg2
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|
//|.macro call_rrrp, func, arg0, arg1, arg2, arg3
//| mov64 rcx, arg3
//| mov rdx, arg2
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|.macro call_rrrr, func, arg0, arg1, arg2, arg3
//| mov rcx, arg3
//| mov rdx, arg2
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|
//|.macro call_rrp, func, arg0, arg1, arg2
//| mov64 rdx, arg2
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|.macro call_rrr, func, arg0, arg1, arg2
//| mov rdx, arg2
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|
//|.macro call_rp, func, arg0, arg1
//| mov64 rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|.macro call_rr, func, arg0, arg1
//| mov rsi, arg1
//| mov rdi, arg0
//| call func
//|.endmacro
//|
//|.macro call_r, func, arg0
//| mov rdi, arg0
//| call func
//|.endmacro
//|
//|.else
//| // define the 64bit registers to the 32 bit counterparts, so the common
//| // code can use r*x for all pointers
//|.define rax, eax
//|.define rcx, ecx
//|.define rdx, edx
//|.define rsp, esp
//|.define rbp, ebp
//|.define rdi, edi
//|.define rsi, esi
//|.define mov64, mov
//|
//|.macro call_rrrr, func, arg0, arg1, arg2, arg3
//| mov dword [rsp+12], arg3
//| mov dword [rsp+8], arg2
//| mov dword [rsp+4], arg1
//| mov dword [rsp], arg0
//| call func
//|.endmacro
//|.macro call_rrr, func, arg0, arg1, arg2
//| mov dword [rsp+8], arg2
//| mov dword [rsp+4], arg1
//| mov dword [rsp], arg0
//| call func
//|.endmacro
//|.macro call_rr, func, arg0, arg1
//| mov dword [rsp+4], arg1
//| mov dword [rsp], arg0
//| call func
//|.endmacro
//|.macro call_r, func, arg0
//| mov dword [rsp], arg0
//| call func
//|.endmacro
//|
//|.define call_rrrp, call_rrrr
//|.define call_rrp, call_rrr
//|.define call_rp, call_rr
//|
//|.endif
//|.macro epilog
//|.if X64
//| mov TOP, [rbp-16]
//| mov L_ARG, [rbp-8]
//|.else
//| mov TOP, [rbp-8]
//| mov L_ARG, [rbp-4]
//|.endif
//| mov rsp, rbp
//| pop rbp
//| ret
//|.endmacro
//|.macro get_errno // note trashes registers
//| call extern GetLastError
//| mov64 rcx, perr
//| mov dword [rcx], eax
//|.endmacro
//|.macro too_few_arguments
//| mov ax, 0
//| call_rp extern luaL_error, L_ARG, &"too few arguments"
//|.endmacro
//|.macro too_many_arguments
//| mov ax, 0
//| call_rp extern luaL_error, L_ARG, &"too many arguments"
//|.endmacro
//|.macro lua_return_arg
//| mov eax, 1
//| epilog
//|.endmacro
//|.macro lua_return_void
//| get_errno
//| mov eax, 0
//| epilog
//|.endmacro
//|.macro lua_return_double
//|.if X64
//| movq qword [rsp+32], xmm0
//|.else
//| fstp qword [rsp+4] // note get_errno doesn't require any stack on x86
//|.endif
//|
//| get_errno
//|
//|.if X64WIN
//| movq xmm1, qword [rsp+32]
//| mov rcx, L_ARG
//|.elif X64
//| movq xmm0, qword [rsp+32]
//| mov rdi, L_ARG
//|.else
//| mov [rsp], L_ARG
//|.endif
//| call extern lua_pushnumber
//| lua_return_arg
//|.endmacro
//|.macro lua_return_bool
//| movzx eax, al
//| mov [rsp+32], eax
//| get_errno
//| mov eax, [rsp+32]
//| call_rr extern lua_pushboolean, L_ARG, rax
//| lua_return_arg
//|.endmacro
//|.macro lua_return_int
//| mov [rsp+32], eax
//| get_errno
//| mov eax, [rsp+32]
//| call_rr extern push_int, L_ARG, rax
//| lua_return_arg
//|.endmacro
//|.macro lua_return_uint
//| mov [rsp+32], eax
//| get_errno
//| mov eax, [rsp+32]
//| call_rr extern push_uint, L_ARG, rax
//| lua_return_arg
//|.endmacro
//|.macro lua_return_long
//| mov [rsp+32], rax
//| get_errno
//| mov rax, [rsp+32]
//| call_rr extern lua_pushinteger, L_ARG, rax
//| lua_return_arg
//|.endmacro
//|.macro lua_return_ulong
//| mov [rsp+32], rax
//| get_errno
//| mov rax, [rsp+32]
//| call_rr extern lua_pushinteger, L_ARG, rax
//| lua_return_arg
//|.endmacro
//|.macro save_registers
//| // use rbp relative so we store values in the outer stack frame
//|.if X64WIN
//| // use the provided shadow space for int registers above prev rbp and
//| // return address
//| mov [rbp+16], rcx
//| mov [rbp+24], rdx
//| mov [rbp+32], r8
//| mov [rbp+40], r9
//| // use the extra space we added for float registers
//| // -16 to store underneath previous value of L_ARG
//| movq qword [rbp-16], xmm0
//| movq qword [rbp-24], xmm1
//| movq qword [rbp-32], xmm2
//| movq qword [rbp-40], xmm3
//|.elif X64
//| movq qword [rbp-16], xmm0
//| movq qword [rbp-24], xmm1
//| movq qword [rbp-32], xmm2
//| movq qword [rbp-40], xmm3
//| movq qword [rbp-48], xmm4
//| movq qword [rbp-56], xmm5
//| movq qword [rbp-64], xmm6
//| movq qword [rbp-72], xmm7
//| mov [rbp-80], rdi
//| mov [rbp-88], rsi
//| mov [rbp-96], rdx
//| mov [rbp-104], rcx
//| mov [rbp-112], r8
//| mov [rbp-120], r9
//|.else
//| // fastcall, -8 to store underneath previous value of L_ARG
//| mov [rbp-8], ecx
//| mov [rbp-12], edx
//|.endif
//|.endmacro
#if defined _WIN64 || defined __amd64__
#define JUMP_SIZE 14
#else
#define JUMP_SIZE 4
#endif
#define MIN_BRANCH INT32_MIN
#define MAX_BRANCH INT32_MAX
#define BRANCH_OFF 4
static void compile_extern_jump(struct jit* jit, lua_State* L, cfunction func, uint8_t* code)
{
/* The jump code is the function pointer followed by a stub to call the
* function pointer. The stub exists in 64 bit so we can jump to functions
* with an offset greater than 2 GB.
*
* Note we have to manually set this up since there are commands buffered
* in the jit state and dynasm doesn't support rip relative addressing.
*
* eg on 64 bit:
* 0-8: function ptr
* 8-14: jmp aword [rip-14]
*
* for 32 bit we only set the function ptr as it can always fit in a 32
* bit displacement
*/
#if defined _WIN64 || defined __amd64__
*(cfunction*) code = func;
code[8] = 0xFF; /* FF /4 operand for jmp */
code[9] = 0x25; /* RIP displacement */
*(int32_t*) &code[10] = -14;
#else
*(cfunction*) code = func;
#endif
}
void compile_globals(struct jit* jit, lua_State* L)
{
struct jit* Dst = jit;
int* perr = &jit->last_errno;
dasm_setup(Dst, build_actionlist);
/* Note: since the return code uses EBP to reset the stack pointer, we
* don't have to track the amount of stack space used. It also means we
* can handle stdcall and cdecl with the same code.
*/
/* Note the various call_* functions want 32 bytes of 16 byte aligned
* stack
*/
compile(Dst, L, NULL, LUA_NOREF);
}
int x86_return_size(lua_State* L, int usr, const struct ctype* ct)
{
int ret = 0;
const struct ctype* mt;
if (ct->calling_convention != C_CALL) {
size_t i;
size_t argn = lua_rawlen(L, usr);
for (i = 1; i <= argn; i++) {
lua_rawgeti(L, usr, (int) i);
mt = (const struct ctype*) lua_touserdata(L, -1);
if (mt->pointers || mt->is_reference) {
ret += sizeof(void*);
} else {
switch (mt->type) {
case DOUBLE_TYPE:
case COMPLEX_FLOAT_TYPE:
case INT64_TYPE:
ret += 8;
break;
case COMPLEX_DOUBLE_TYPE:
ret += 16;
break;
case INTPTR_TYPE:
ret += sizeof(intptr_t);
break;
case FUNCTION_PTR_TYPE:
ret += sizeof(cfunction);
break;
case BOOL_TYPE:
case FLOAT_TYPE:
case INT8_TYPE:
case INT16_TYPE:
case INT32_TYPE:
case ENUM_TYPE:
ret += 4;
break;
default:
return luaL_error(L, "NYI - argument type");
}
}
lua_pop(L, 1);
}
}
#if !defined _WIN64 && !defined __amd64__
lua_rawgeti(L, usr, 0);
mt = (const struct ctype*) lua_touserdata(L, -1);
if (!mt->pointers && !mt->is_reference && mt->type == COMPLEX_DOUBLE_TYPE) {
ret += sizeof(void*);
}
lua_pop(L, 1);
#endif
return ret;
}
#ifdef _WIN64
#define MAX_REGISTERS(ct) 4 /* rcx, rdx, r8, r9 */
#elif defined __amd64__
#define MAX_INT_REGISTERS(ct) 6 /* rdi, rsi, rdx, rcx, r8, r9 */
#define MAX_FLOAT_REGISTERS(ct) 8 /* xmm0-7 */
#else
#define MAX_INT_REGISTERS(ct) ((ct)->calling_convention == FAST_CALL ? 2 /* ecx, edx */ : 0)
#define MAX_FLOAT_REGISTERS(ct) 0
#endif
struct reg_alloc {
#ifdef _WIN64
int regs;
int is_float[4];
int is_int[4];
#else
int floats;
int ints;
#endif
int off;
};
#ifdef _WIN64
#define REGISTER_STACK_SPACE(ct) (4*8)
#elif defined __amd64__
#define REGISTER_STACK_SPACE(ct) (14*8)
#else
#define REGISTER_STACK_SPACE(ct) ALIGN_UP(((ct)->calling_convention == FAST_CALL ? 2*4 : 0), 15)
#endif
/* Fastcall:
* Uses ecx, edx as first two int registers
* Everything else on stack (include 64bit ints)
* No overflow stack space
* Pops the stack before returning
* Returns int in eax, float in ST0
* We use the same register allocation logic as posix x64 with 2 int regs and 0 float regs
*/
static void get_int(Dst_DECL, const struct ctype* ct, struct reg_alloc* reg, int is_int64)
{
/* grab the register from the shadow space */
#ifdef _WIN64
if (reg->regs < MAX_REGISTERS(ct)) {
//| mov rcx, [rbp + 16 + 8*reg->regs]
dasm_put(Dst, 0, 16 + 8*reg->regs);
reg->regs++;
}
#elif __amd64__
if (reg->ints < MAX_INT_REGISTERS(ct)) {
//| mov rcx, [rbp - 80 - 8*reg->ints]
dasm_put(Dst, 0, - 80 - 8*reg->ints);
reg->ints++;
}
#else
if (!is_int64 && reg->ints < MAX_INT_REGISTERS(ct)) {
//| mov ecx, [rbp - 8 - 4*reg->ints]
dasm_put(Dst, 0, - 8 - 4*reg->ints);
reg->ints++;
}
#endif
else if (is_int64) {
//|.if X64
//| mov rcx, [rbp + reg->off]
//|.else
//| mov rcx, [rbp + reg->off]
//| mov rdx, [rbp + reg->off + 4]
//|.endif
dasm_put(Dst, 4, reg->off, reg->off + 4);
reg->off += 8;
} else {
//| mov ecx, [rbp + reg->off]
dasm_put(Dst, 0, reg->off);
#if defined __amd64__ || defined _WIN64
/* The parameters to a function on stack are always 8 byte aligned. */
reg->off += 8;
#else
reg->off += 4;
#endif
}
}
static void add_int(Dst_DECL, const struct ctype* ct, struct reg_alloc* reg, int is_int64)
{
#ifdef _WIN64
if (reg->regs < MAX_REGISTERS(ct)) {
//| mov [rsp + 32 + 8*(reg->regs)], rax
dasm_put(Dst, 11, 32 + 8*(reg->regs));
reg->is_int[reg->regs++] = 1;
}
#elif __amd64__
if (reg->ints < MAX_INT_REGISTERS(ct)) {
//| mov [rsp + 32 + 8*reg->ints], rax
dasm_put(Dst, 11, 32 + 8*reg->ints);
reg->ints++;
}
#else
if (!is_int64 && reg->ints < MAX_INT_REGISTERS(ct)) {
//| mov [rsp + 32 + 4*reg->ints], rax
dasm_put(Dst, 11, 32 + 4*reg->ints);
reg->ints++;
}
#endif
else {
#if defined _WIN64 || defined __amd64__
if (reg->off % 8 != 0) {
reg->off += 8 - (reg->off % 8);
}
#endif
if (is_int64) {
//|.if X64
//| mov [rsp + reg->off], rax
//|.else
//| mov [rsp + reg->off], RET_L
//| mov [rsp + reg->off + 4], RET_H
//|.endif
dasm_put(Dst, 17, reg->off, reg->off + 4);
reg->off += 8;
} else {
//| mov [rsp+reg->off], eax
dasm_put(Dst, 11, reg->off);
reg->off += 4;
}
}
}
static void get_float(Dst_DECL, const struct ctype* ct, struct reg_alloc* reg, int is_double)
{
#if !defined _WIN64 && !defined __amd64__
assert(MAX_FLOAT_REGISTERS(ct) == 0);
if (is_double) {
//| fld qword [rbp + reg->off]
dasm_put(Dst, 28, reg->off);
reg->off += 8;
} else {
//| fld dword [rbp + reg->off]
dasm_put(Dst, 32, reg->off);
reg->off += 4;
}
#else
int off;
#ifdef _WIN64
if (reg->regs < MAX_REGISTERS(ct)) {
off = -16 - 8*reg->regs;
reg->regs++;
}
#else
if (reg->floats < MAX_FLOAT_REGISTERS(ct)) {
off = -16 - 8*reg->floats;
reg->floats++;
}
#endif
else {
off = reg->off;
reg->off += is_double ? 8 : 4;
}
if (is_double) {
//| movq xmm0, qword [rbp + off]
dasm_put(Dst, 36, off);
} else {
//| cvtss2sd xmm0, dword [rbp + off]
dasm_put(Dst, 43, off);
}
#endif
}
static void add_float(Dst_DECL, const struct ctype* ct, struct reg_alloc* reg, int is_double)
{
#if !defined _WIN64 && !defined __amd64__
assert(MAX_FLOAT_REGISTERS(ct) == 0);
if (is_double) {
//| fstp qword [rsp + reg->off]
dasm_put(Dst, 50, reg->off);
reg->off += 8;
} else {
//| fstp dword [rsp + reg->off]
dasm_put(Dst, 56, reg->off);
reg->off += 4;
}
#else
#ifdef _WIN64
if (reg->regs < MAX_REGISTERS(ct)) {
if (is_double) {
//| movq qword [rsp + 32 + 8*(reg->regs)], xmm0
dasm_put(Dst, 62, 32 + 8*(reg->regs));
} else {
//| cvtsd2ss xmm0, xmm0
//| movq qword [rsp + 32 + 8*(reg->regs)], xmm0
dasm_put(Dst, 70, 32 + 8*(reg->regs));
}
reg->is_float[reg->regs++] = 1;
}
#else
if (reg->floats < MAX_FLOAT_REGISTERS(ct)) {
if (is_double) {
//| movq qword [rsp + 32 + 8*(MAX_INT_REGISTERS(ct) + reg->floats)], xmm0
dasm_put(Dst, 62, 32 + 8*(MAX_INT_REGISTERS(ct) + reg->floats));
} else {
//| cvtsd2ss xmm0, xmm0
//| movq qword [rsp + 32 + 8*(MAX_INT_REGISTERS(ct) + reg->floats)], xmm0
dasm_put(Dst, 70, 32 + 8*(MAX_INT_REGISTERS(ct) + reg->floats));
}
reg->floats++;
}
#endif
else if (is_double) {
//| movq qword [rsp + reg->off], xmm0
dasm_put(Dst, 62, reg->off);
reg->off += 8;
} else {
//| cvtsd2ss xmm0, xmm0
//| movd dword [rsp + reg->off], xmm0
dasm_put(Dst, 83, reg->off);
reg->off += 4;
}
#endif
}
#if defined _WIN64 || defined __amd64__
#define add_pointer(jit, ct, reg) add_int(jit, ct, reg, 1)
#define get_pointer(jit, ct, reg) get_int(jit, ct, reg, 1)
#else
#define add_pointer(jit, ct, reg) add_int(jit, ct, reg, 0)
#define get_pointer(jit, ct, reg) get_int(jit, ct, reg, 0)
#endif
cfunction compile_callback(lua_State* L, int fidx, int ct_usr, const struct ctype* ct)
{
int i, nargs;
cfunction* pf;
struct ctype ct2 = *ct;
const struct ctype* mt;
struct reg_alloc reg;
int num_upvals = 0;
int top = lua_gettop(L);
struct jit* Dst = get_jit(L);
int ref;
int hidden_arg_off = 0;
ct_usr = lua_absindex(L, ct_usr);
fidx = lua_absindex(L, fidx);
assert(lua_isnil(L, fidx) || lua_isfunction(L, fidx));
memset(®, 0, sizeof(reg));
#ifdef _WIN64
reg.off = 16 + REGISTER_STACK_SPACE(ct); /* stack registers are above the shadow space */
#elif __amd64__
reg.off = 16;
#else
reg.off = 8;
#endif
dasm_setup(Dst, build_actionlist);
// add a table to store ctype and function upvalues
// callback_set assumes the first value is the lua function
nargs = (int) lua_rawlen(L, ct_usr);
lua_newtable(L);
lua_pushvalue(L, -1);
ref = luaL_ref(L, LUA_REGISTRYINDEX);
if (ct->has_var_arg) {
luaL_error(L, "can't create callbacks with varargs");
}
// setup a stack frame to hold args for the call into lua_call
//| push rbp
//| mov rbp, rsp
//| push L_ARG
//| // stack is 4 or 8 (mod 16) (L_ARG, rbp, rip)
//|.if X64
//| // 8 to realign, 16 for return vars, 32 for local calls, rest to save registers
//| sub rsp, 8 + 16 + 32 + REGISTER_STACK_SPACE(ct)
//| save_registers
//|.else
//| // 4 to realign, 16 for return vars, 32 for local calls, rest to save registers
//| sub rsp, 4 + 16 + 32 + REGISTER_STACK_SPACE(ct)
dasm_put(Dst, 96, 4 + 16 + 32 + REGISTER_STACK_SPACE(ct));
if (ct->calling_convention == FAST_CALL) {
//| save_registers
dasm_put(Dst, 105);
}
//|.endif
// hardcode the lua_State* value into the assembly
//| mov64 L_ARG, L
dasm_put(Dst, 114, L);
/* get the upval table */
//| call_rrr extern lua_rawgeti, L_ARG, LUA_REGISTRYINDEX, ref
dasm_put(Dst, 117, ref, LUA_REGISTRYINDEX);
/* get the lua function */
lua_pushvalue(L, fidx);
lua_rawseti(L, -2, ++num_upvals);
assert(num_upvals == CALLBACK_FUNC_USR_IDX);
//| call_rrr extern lua_rawgeti, L_ARG, -1, num_upvals
dasm_put(Dst, 135, num_upvals);
#if !defined _WIN64 && !defined __amd64__
lua_rawgeti(L, ct_usr, 0);
mt = (const struct ctype*) lua_touserdata(L, -1);
if (!mt->pointers && !mt->is_reference && mt->type == COMPLEX_DOUBLE_TYPE) {
hidden_arg_off = reg.off;
reg.off += sizeof(void*);
}
lua_pop(L, 1);
#else
(void) hidden_arg_off;
#endif
for (i = 1; i <= nargs; i++) {
lua_rawgeti(L, ct_usr, i);
mt = (const struct ctype*) lua_touserdata(L, -1);
if (mt->pointers || mt->is_reference) {
lua_getuservalue(L, -1);
lua_rawseti(L, -3, ++num_upvals); /* usr value */
lua_rawseti(L, -2, ++num_upvals); /* mt */
/* on the lua stack in the callback:
* upval tbl, lua func, i-1 args
*/
//| call_rrr extern lua_rawgeti, L_ARG, -i-1, num_upvals-1
//| call_rrp extern push_cdata, L_ARG, -1, mt
dasm_put(Dst, 160, num_upvals-1, -i-1, mt);
get_pointer(Dst, ct, ®);
//| mov [rax], rcx
//| call_rr, extern lua_remove, L_ARG, -2
dasm_put(Dst, 202);
} else {
switch (mt->type) {
case INT64_TYPE:
lua_getuservalue(L, -1);
lua_rawseti(L, -3, ++num_upvals); /* mt */
lua_pop(L, 1);
//| call_rrp extern push_cdata, L_ARG, 0, mt
dasm_put(Dst, 224, mt);
get_int(Dst, ct, ®, 1);
//|.if X64
//| mov [rax], rcx
//|.else
//| mov [rax], ecx
//| mov [rax+4], edx
//|.endif
dasm_put(Dst, 245);
break;
case INTPTR_TYPE:
lua_getuservalue(L, -1);
lua_rawseti(L, -3, ++num_upvals); /* mt */
lua_pop(L, 1);
//| call_rrp extern push_cdata, L_ARG, 0, mt
dasm_put(Dst, 224, mt);
get_pointer(Dst, ct, ®);
//| mov [rax], rcx
dasm_put(Dst, 251);
break;
case COMPLEX_FLOAT_TYPE:
lua_pop(L, 1);
#if defined _WIN64 || defined __amd64__
/* complex floats are two floats packed into a double */
//| call_rrp extern push_cdata, L_ARG, 0, mt
dasm_put(Dst, 224, mt);
get_float(Dst, ct, ®, 1);
//| movq qword [rax], xmm0
dasm_put(Dst, 254);
#else
/* complex floats are real followed by imag on the stack */
//| call_rrp extern push_cdata, L_ARG, 0, mt
dasm_put(Dst, 224, mt);
get_float(Dst, ct, ®, 0);
//| fstp dword [rax]
dasm_put(Dst, 259);
get_float(Dst, ct, ®, 0);
//| fstp dword [rax+4]
dasm_put(Dst, 262);
#endif
break;
case COMPLEX_DOUBLE_TYPE:
lua_pop(L, 1);
//| call_rrp extern push_cdata, L_ARG, 0, mt
dasm_put(Dst, 224, mt);
/* real */
get_float(Dst, ct, ®, 1);
//|.if X64
//| movq qword [rax], xmm0
//|.else
//| fstp qword [rax]
//|.endif
dasm_put(Dst, 266);
/* imag */
get_float(Dst, ct, ®, 1);
//|.if X64
//| movq qword [rax+8], xmm0
//|.else
//| fstp qword [rax+8]
//|.endif
dasm_put(Dst, 269);
break;
case FLOAT_TYPE:
case DOUBLE_TYPE:
lua_pop(L, 1);
get_float(Dst, ct, ®, mt->type == DOUBLE_TYPE);
//|.if X64WIN
//| movq xmm1, xmm0
//| mov rcx, L_ARG
//|.elif X64
//| // for 64bit xmm0 is already set
//| mov rdi, L_ARG
//|.else
//| fstp qword [rsp+4]
//| mov [rsp], L_ARG
//|.endif
//| call extern lua_pushnumber
dasm_put(Dst, 273);
break;