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famec: eliminate global context ptr

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saves like 25-35K of .text

current compile resource usage on i5-6600K:
            cpu  mem
gcc 5.4.0:  17.0 1.1g
clang 3.8:  1686 2.3g

FAMEC_NO_GOTOS:
gcc 5.4.0:   8.4 0.4g
clang 3.8:  20.0 0.15g
vs2008/O2: ~1800 ?
vs2008/O1:  ~720 ?
This commit is contained in:
notaz 2017-10-15 01:15:00 +03:00
parent 12f23dac6f
commit 7669591e08
7 changed files with 346 additions and 371 deletions
Download patch file Download diff file Expand all files Collapse all files

4
cpu/fame/fame.h
View file

@ -143,8 +143,6 @@ typedef struct
unsigned long Fetch[M68K_FETCHBANK1];
} M68K_CONTEXT;
extern M68K_CONTEXT *g_m68kcontext;
typedef enum
{
fm68k_reason_emulate = 0,
@ -163,7 +161,7 @@ int fm68k_reset(M68K_CONTEXT *ctx);
int fm68k_emulate(M68K_CONTEXT *ctx, int n, fm68k_call_reason reason);
int fm68k_would_interrupt(M68K_CONTEXT *ctx); // to be called from fm68k_emulate()
unsigned fm68k_get_pc(M68K_CONTEXT *ctx);
unsigned int fm68k_get_pc(const M68K_CONTEXT *ctx);
// PICODRIVE_HACK
int fm68k_idle_install(void);

249
cpu/fame/famec.c
View file

@ -228,21 +228,21 @@ typedef signed int s32;
// internals core macros
/////////////////////////
#define DREG(X) (m68kcontext.dreg[(X)].D)
#define DREGu32(X) (m68kcontext.dreg[(X)].D)
#define DREGs32(X) (m68kcontext.dreg[(X)].SD)
#define DREGu16(X) (m68kcontext.dreg[(X)].W)
#define DREGs16(X) (m68kcontext.dreg[(X)].SW)
#define DREGu8(X) (m68kcontext.dreg[(X)].B)
#define DREGs8(X) (m68kcontext.dreg[(X)].SB)
#define DREG(X) (ctx->dreg[(X)].D)
#define DREGu32(X) (ctx->dreg[(X)].D)
#define DREGs32(X) (ctx->dreg[(X)].SD)
#define DREGu16(X) (ctx->dreg[(X)].W)
#define DREGs16(X) (ctx->dreg[(X)].SW)
#define DREGu8(X) (ctx->dreg[(X)].B)
#define DREGs8(X) (ctx->dreg[(X)].SB)
#define AREG(X) (m68kcontext.areg[(X)].D)
#define AREGu32(X) (m68kcontext.areg[(X)].D)
#define AREGs32(X) (m68kcontext.areg[(X)].SD)
#define AREGu16(X) (m68kcontext.areg[(X)].W)
#define AREGs16(X) (m68kcontext.areg[(X)].SW)
#define AREG(X) (ctx->areg[(X)].D)
#define AREGu32(X) (ctx->areg[(X)].D)
#define AREGs32(X) (ctx->areg[(X)].SD)
#define AREGu16(X) (ctx->areg[(X)].W)
#define AREGs16(X) (ctx->areg[(X)].SW)
#define ASP (m68kcontext.asp)
#define ASP (ctx->asp)
#define LSL(A, C) ((A) << (C))
#define LSR(A, C) ((A) >> (C))
@ -271,18 +271,18 @@ typedef signed int s32;
#ifdef FAMEC_ROLL_INLINE
#define RET(A) \
m68kcontext.io_cycle_counter -= (A); \
if (m68kcontext.io_cycle_counter <= 0) goto famec_Exec_End; \
ctx->io_cycle_counter -= (A); \
if (ctx->io_cycle_counter <= 0) goto famec_Exec_End; \
NEXT
#else
#define RET(A) \
m68kcontext.io_cycle_counter -= (A); \
if (m68kcontext.io_cycle_counter <= 0) goto famec_Exec_End; \
ctx->io_cycle_counter -= (A); \
if (ctx->io_cycle_counter <= 0) goto famec_Exec_End; \
goto famec_Exec;
#endif
#define RET0() \
m68kcontext.io_cycle_counter = -6; \
ctx->io_cycle_counter = -6; \
goto famec_End;
#else
@ -290,20 +290,20 @@ typedef signed int s32;
#define NEXT \
do { \
FETCH_WORD(Opcode); \
JumpTable[Opcode](); \
}while(m68kcontext.io_cycle_counter>0);
JumpTable[Opcode](ctx); \
} while (ctx->io_cycle_counter > 0);
#define RET(A) \
m68kcontext.io_cycle_counter -= (A); \
ctx->io_cycle_counter -= (A); \
return;
#define RET0() \
m68kcontext.io_cycle_counter = -6; \
ctx->io_cycle_counter = -6; \
return;
#endif
#define M68K_PPL (m68kcontext.sr >> 8) & 7
#define M68K_PPL (ctx->sr >> 8) & 7
#define GET_PC \
(u32)((uptr)PC - BasePC)
@ -321,7 +321,7 @@ typedef signed int s32;
{ \
u32 pc = A; \
FORCE_ALIGNMENT(pc); \
BasePC = m68kcontext.Fetch[(pc >> M68K_FETCHSFT) & M68K_FETCHMASK]; \
BasePC = ctx->Fetch[(pc >> M68K_FETCHSFT) & M68K_FETCHMASK]; \
PC = (u16*)((pc & M68K_ADR_MASK) + BasePC); \
}
@ -331,7 +331,7 @@ typedef signed int s32;
{ \
u32 pc = A; \
FORCE_ALIGNMENT(pc); \
BasePC = m68kcontext.Fetch[(pc >> M68K_FETCHSFT) & M68K_FETCHMASK]; \
BasePC = ctx->Fetch[(pc >> M68K_FETCHSFT) & M68K_FETCHMASK]; \
BasePC -= pc & 0xFF000000; \
PC = (u16*)(pc + BasePC); \
}
@ -346,29 +346,29 @@ typedef signed int s32;
// CCnt = io_cycle_counter;
#define READ_BYTE_F(A, D) \
D = m68kcontext.read_byte(A) & 0xFF;
D = ctx->read_byte(A) & 0xFF;
#define READ_WORD_F(A, D) \
D = m68kcontext.read_word(A) & 0xFFFF;
D = ctx->read_word(A) & 0xFFFF;
#define READ_LONG_F(A, D) \
D = m68kcontext.read_long(A);
D = ctx->read_long(A);
#define READSX_LONG_F READ_LONG_F
#define WRITE_LONG_F(A, D) \
m68kcontext.write_long(A, D);
ctx->write_long(A, D);
#define WRITE_LONG_DEC_F(A, D) \
m68kcontext.write_word((A) + 2, (D) & 0xFFFF); \
m68kcontext.write_word((A), (D) >> 16);
ctx->write_word((A) + 2, (D) & 0xFFFF); \
ctx->write_word((A), (D) >> 16);
#define PUSH_32_F(D) \
AREG(7) -= 4; \
m68kcontext.write_long(AREG(7), D);
ctx->write_long(AREG(7), D);
#define POP_32_F(D) \
D = m68kcontext.read_long(AREG(7)); \
D = ctx->read_long(AREG(7)); \
AREG(7) += 4;
#ifndef FAME_BIG_ENDIAN
@ -440,23 +440,23 @@ typedef signed int s32;
#endif
#define READSX_BYTE_F(A, D) \
D = (s8)m68kcontext.read_byte(A);
D = (s8)ctx->read_byte(A);
#define READSX_WORD_F(A, D) \
D = (s16)m68kcontext.read_word(A);
D = (s16)ctx->read_word(A);
#define WRITE_BYTE_F(A, D) \
m68kcontext.write_byte(A, D);
ctx->write_byte(A, D);
#define WRITE_WORD_F(A, D) \
m68kcontext.write_word(A, D);
ctx->write_word(A, D);
#define PUSH_16_F(D) \
m68kcontext.write_word(AREG(7) -= 2, D); \
ctx->write_word(AREG(7) -= 2, D); \
#define POP_16_F(D) \
D = (u16)m68kcontext.read_word(AREG(7)); \
D = (u16)ctx->read_word(AREG(7)); \
AREG(7) += 2;
#define GET_CCR \
@ -501,17 +501,17 @@ typedef signed int s32;
#endif
#define CHECK_INT_TO_JUMP(CLK) \
if (interrupt_chk__()) \
if (interrupt_chk__(ctx)) \
{ \
cycles_needed=m68kcontext.io_cycle_counter-(CLK); \
m68kcontext.io_cycle_counter=(CLK); \
cycles_needed=ctx->io_cycle_counter-(CLK); \
ctx->io_cycle_counter=(CLK); \
}
#ifdef FAMEC_CHECK_BRANCHES
#ifdef FAMEC_NO_GOTOS
#define CHECK_BRANCH_EXCEPTION_GOTO_END m68kcontext.io_cycle_counter=0; return;
#define CHECK_BRANCH_EXCEPTION_GOTO_END ctx->io_cycle_counter=0; return;
#else
#define CHECK_BRANCH_EXCEPTION_GOTO_END goto famec_Exec_End;
#endif
@ -520,8 +520,8 @@ typedef signed int s32;
if ((_PC_)&1) \
{ \
u32 new_PC, pr_PC=GET_PC; \
m68kcontext.execinfo |= FM68K_EMULATE_GROUP_0; \
new_PC = execute_exception_group_0(M68K_ADDRESS_ERROR_EX, 0, pr_PC, 0x12 ); \
ctx->execinfo |= FM68K_EMULATE_GROUP_0; \
new_PC = execute_exception_group_0(ctx, M68K_ADDRESS_ERROR_EX, 0, pr_PC, 0x12 ); \
SET_PC(new_PC); \
CHECK_BRANCH_EXCEPTION_GOTO_END \
}
@ -529,30 +529,25 @@ typedef signed int s32;
#define CHECK_BRANCH_EXCEPTION(_PC_)
#endif
#ifdef FAMEC_NO_GOTOS
#define Opcode ctx->Opcode
#define cycles_needed ctx->cycles_needed
#define PC ctx->PC
#define BasePC ctx->BasePC
#define flag_C ctx->flag_C
#define flag_V ctx->flag_V
#define flag_NotZ ctx->flag_NotZ
#define flag_N ctx->flag_N
#define flag_X ctx->flag_X
#endif
#define flag_T ctx->flag_T
#define flag_S ctx->flag_S
#define flag_I ctx->flag_I
// global variable
///////////////////
/* Current CPU context */
M68K_CONTEXT *g_m68kcontext;
#define m68kcontext (*g_m68kcontext)
#ifdef FAMEC_NO_GOTOS
#define Opcode m68kcontext.Opcode
#define cycles_needed m68kcontext.cycles_needed
#define PC m68kcontext.PC
#define BasePC m68kcontext.BasePC
#define flag_C m68kcontext.flag_C
#define flag_V m68kcontext.flag_V
#define flag_NotZ m68kcontext.flag_NotZ
#define flag_N m68kcontext.flag_N
#define flag_X m68kcontext.flag_X
#endif
#define flag_T m68kcontext.flag_T
#define flag_S m68kcontext.flag_S
#define flag_I m68kcontext.flag_I
static u32 initialised = 0;
#ifdef PICODRIVE_HACK
@ -560,7 +555,7 @@ extern M68K_CONTEXT PicoCpuFS68k;
#endif
/* Custom function handler */
typedef void (*opcode_func)(void);
typedef void (*opcode_func)(M68K_CONTEXT *ctx);
static opcode_func JumpTable[0x10000];
@ -679,30 +674,28 @@ int fm68k_reset(M68K_CONTEXT *ctx)
if (!initialised)
init_jump_table();
g_m68kcontext = ctx;
// Si la CPU esta en ejecucion, salir con M68K_RUNNING
if (m68kcontext.execinfo & M68K_RUNNING)
if (ctx->execinfo & M68K_RUNNING)
return M68K_RUNNING;
// Resetear registros
//memset(&m68kcontext.dreg[0], 0, 16*4);
//memset(&ctx->dreg[0], 0, 16*4);
// Resetear interrupts, execinfo y ASP
m68kcontext.interrupts[0] = 0;
m68kcontext.execinfo = 0;
ctx->interrupts[0] = 0;
ctx->execinfo = 0;
ASP = 0;
// Fijar registro de estado
m68kcontext.sr = (m68kcontext.sr & 0xff) | 0x2700;
ctx->sr = (ctx->sr & 0xff) | 0x2700;
// Obtener puntero de pila inicial y PC
AREG(7) = m68kcontext.read_long(0);
m68kcontext.pc = m68kcontext.read_long(4);
AREG(7) = ctx->read_long(0);
ctx->pc = ctx->read_long(4);
#ifdef FAMEC_DEBUG
puts("Reset 68k done!\n");
printf("PC = 0x%08X\n",m68kcontext.pc);
printf("PC = 0x%08X\n",ctx->pc);
#endif
return M68K_OK;
@ -714,39 +707,39 @@ int fm68k_reset(M68K_CONTEXT *ctx)
/* No recibe parametros */
/* Retorna 68k PC */
/****************************************************************************/
u32 fm68k_get_pc(M68K_CONTEXT *context)
u32 fm68k_get_pc(const M68K_CONTEXT *ctx)
{
#ifdef FAMEC_NO_GOTOS
return (context->execinfo & M68K_RUNNING)?(uptr)PC-BasePC:context->pc;
return (ctx->execinfo & M68K_RUNNING)?(uptr)PC-BasePC:ctx->pc;
#else
return context->pc; // approximate PC in this mode
return ctx->pc; // approximate PC in this mode
#endif
}
//////////////////////////
// Chequea las interrupciones y las inicia
static FAMEC_EXTRA_INLINE s32 interrupt_chk__(void)
static FAMEC_EXTRA_INLINE s32 interrupt_chk__(M68K_CONTEXT *ctx)
{
if (m68kcontext.interrupts[0] > flag_I)
return m68kcontext.interrupts[0];
if (ctx->interrupts[0] > flag_I)
return ctx->interrupts[0];
return 0;
}
int fm68k_would_interrupt(M68K_CONTEXT *ctx)
{
return interrupt_chk__();
return interrupt_chk__(ctx);
}
static FAMEC_EXTRA_INLINE u32 execute_exception(s32 vect, u32 oldPC, u32 oldSR)
static FAMEC_EXTRA_INLINE u32 execute_exception(M68K_CONTEXT *ctx, s32 vect, u32 oldPC, u32 oldSR)
{
u32 newPC;
//u32 oldSR = GET_SR;
m68kcontext.io_cycle_counter -= exception_cycle_table[vect];
ctx->io_cycle_counter -= exception_cycle_table[vect];
#ifdef FAMEC_EMULATE_TRACE
m68kcontext.execinfo &= ~FM68K_EMULATE_TRACE;
ctx->execinfo &= ~FM68K_EMULATE_TRACE;
#endif
PRE_IO
@ -785,12 +778,12 @@ static FAMEC_EXTRA_INLINE u32 execute_exception(s32 vect, u32 oldPC, u32 oldSR)
return newPC;
}
static FAMEC_EXTRA_INLINE u32 execute_exception_group_0(s32 vect, s32 addr, u16 spec_info, u32 oldSR)
static FAMEC_EXTRA_INLINE u32 execute_exception_group_0(M68K_CONTEXT *ctx, s32 vect, s32 addr, u16 spec_info, u32 oldSR)
{
u32 newPC;
u16 inst_reg = 0;
newPC = execute_exception(vect, addr, oldSR);
//if (!(m68kcontext.icust_handler && m68kcontext.icust_handler[vect]))
newPC = execute_exception(ctx, vect, addr, oldSR);
//if (!(ctx->icust_handler && ctx->icust_handler[vect]))
{
PUSH_16_F(inst_reg);
PUSH_32_F(addr);
@ -802,7 +795,7 @@ static FAMEC_EXTRA_INLINE u32 execute_exception_group_0(s32 vect, s32 addr, u16
#ifdef FAMEC_NO_GOTOS
#define OPCODE(N_OP) static void OP_##N_OP(void)
#define OPCODE(N_OP) static void OP_##N_OP(M68K_CONTEXT *ctx)
#define CAST_OP(N_OP) (opcode_func)&OP_##N_OP
#include "famec_opcodes.h"
#endif
@ -839,21 +832,19 @@ int fm68k_emulate(M68K_CONTEXT *ctx, s32 cycles, fm68k_call_reason reason)
}
#endif // FAMEC_NO_GOTOS
g_m68kcontext = ctx;
// won't emulate double fault
// if (m68kcontext.execinfo & M68K_FAULTED) return -1;
// if (ctx->execinfo & M68K_FAULTED) return -1;
// Cache PPL
flag_I = M68K_PPL;
if (m68kcontext.execinfo & FM68K_HALTED)
if (ctx->execinfo & FM68K_HALTED)
{
if (interrupt_chk__() <= 0)
if (interrupt_chk__(ctx) <= 0)
{
return cycles;
}
m68kcontext.execinfo &= ~FM68K_HALTED;
ctx->execinfo &= ~FM68K_HALTED;
}
#ifdef FAMEC_DEBUG
@ -861,13 +852,13 @@ int fm68k_emulate(M68K_CONTEXT *ctx, s32 cycles, fm68k_call_reason reason)
#endif
/* Poner la CPU en estado de ejecucion */
m68kcontext.execinfo |= M68K_RUNNING;
ctx->execinfo |= M68K_RUNNING;
// Cache SR
SET_SR(m68kcontext.sr)
SET_SR(ctx->sr)
// Fijar PC
SET_PC(m68kcontext.pc)
SET_PC(ctx->pc)
#ifdef FAMEC_DEBUG
printf("PC: %p\n",PC);
@ -875,33 +866,33 @@ int fm68k_emulate(M68K_CONTEXT *ctx, s32 cycles, fm68k_call_reason reason)
#endif
/* guardar ciclos de ejecucion solicitados */
m68kcontext.io_cycle_counter = cycles;
ctx->io_cycle_counter = cycles;
cycles_needed = 0;
#ifdef FAMEC_EMULATE_TRACE
if (!(m68kcontext.execinfo & FM68K_EMULATE_TRACE))
if (!(ctx->execinfo & FM68K_EMULATE_TRACE))
#endif
{
s32 line=interrupt_chk__();
s32 line=interrupt_chk__(ctx);
if (line>0)
{
/* comprobar si hay rutina de acknowledge */
if (m68kcontext.iack_handler != NULL)
m68kcontext.iack_handler(line);
if (ctx->iack_handler != NULL)
ctx->iack_handler(line);
else
m68kcontext.interrupts[0] = 0;
ctx->interrupts[0] = 0;
SET_PC(execute_exception(line + 0x18, GET_PC, GET_SR));
SET_PC(execute_exception(ctx, line + 0x18, GET_PC, GET_SR));
flag_I = (u32)line;
if (m68kcontext.io_cycle_counter <= 0) goto famec_End;
if (ctx->io_cycle_counter <= 0) goto famec_End;
}
#ifdef FAMEC_EMULATE_TRACE
else
if (flag_T)
{
m68kcontext.execinfo |= FM68K_EMULATE_TRACE;
cycles_needed = m68kcontext.io_cycle_counter;
m68kcontext.io_cycle_counter=0;
ctx->execinfo |= FM68K_EMULATE_TRACE;
cycles_needed = ctx->io_cycle_counter;
ctx->io_cycle_counter=0;
}
#endif
}
@ -927,14 +918,14 @@ famec_Exec:
#endif
#ifdef FAMEC_EMULATE_TRACE
if (m68kcontext.execinfo & FM68K_EMULATE_TRACE)
if (ctx->execinfo & FM68K_EMULATE_TRACE)
{
m68kcontext.io_cycle_counter += cycles_needed;
ctx->io_cycle_counter += cycles_needed;
cycles_needed = 0;
m68kcontext.execinfo &= ~FM68K_EMULATE_TRACE;
m68kcontext.execinfo |= FM68K_DO_TRACE;
SET_PC(execute_exception(M68K_TRACE_EX, GET_PC, GET_SR));
if (m68kcontext.io_cycle_counter > 0)
ctx->execinfo &= ~FM68K_EMULATE_TRACE;
ctx->execinfo |= FM68K_DO_TRACE;
SET_PC(execute_exception(ctx, M68K_TRACE_EX, GET_PC, GET_SR));
if (ctx->io_cycle_counter > 0)
{
//NEXT
goto famec_Exec;
@ -945,24 +936,24 @@ famec_Exec:
if (cycles_needed != 0)
{
u32 line;
m68kcontext.io_cycle_counter += cycles_needed;
ctx->io_cycle_counter += cycles_needed;
cycles_needed = 0;
//if (m68kcontext.io_cycle_counter <= 0) goto famec_End;
line=interrupt_chk__();
//if (ctx->io_cycle_counter <= 0) goto famec_End;
line=interrupt_chk__(ctx);
if (line>0)
{
if (m68kcontext.iack_handler != NULL)
m68kcontext.iack_handler(line);
if (ctx->iack_handler != NULL)
ctx->iack_handler(line);
else
m68kcontext.interrupts[0] = 0;
ctx->interrupts[0] = 0;
SET_PC(execute_exception(line + 0x18, GET_PC, GET_SR));
SET_PC(execute_exception(ctx, line + 0x18, GET_PC, GET_SR));
flag_I = (u32)line;
}
#ifdef FAMEC_EMULATE_TRACE
if (!(flag_T))
#endif
if (m68kcontext.io_cycle_counter > 0)
if (ctx->io_cycle_counter > 0)
{
//NEXT
goto famec_Exec;
@ -970,19 +961,19 @@ famec_Exec:
}
famec_End:
m68kcontext.sr = GET_SR;
m68kcontext.pc = GET_PC;
ctx->sr = GET_SR;
ctx->pc = GET_PC;
m68kcontext.execinfo &= ~M68K_RUNNING;
ctx->execinfo &= ~M68K_RUNNING;
#ifdef FAMEC_DEBUG
printf("En really end...\n");
printf("PC: %p\n",PC);
printf("BasePC: 0x%08x\n",BasePC);
printf("pc: 0x%08x\n",m68kcontext.pc);
printf("pc: 0x%08x\n",ctx->pc);
#endif
return cycles - m68kcontext.io_cycle_counter;
return cycles - ctx->io_cycle_counter;
#ifndef FAMEC_NO_GOTOS
init_jump_table:

426
cpu/fame/famec_opcodes.h
View file

File diff suppressed because it is too large Load diff

1
pico/cd/mcd.c
View file

@ -139,7 +139,6 @@ static void SekRunS68k(unsigned int to)
m68k_set_context(&PicoCpuMM68k);
#elif defined(EMU_F68K)
SekCycleCntS68k += fm68k_emulate(&PicoCpuFS68k, cyc_do, 0) - cyc_do;
g_m68kcontext = &PicoCpuFM68k;
#endif
}

9
pico/cd/sek.c
View file

@ -117,15 +117,10 @@ PICO_INTERNAL void SekInitS68k(void)
}
#endif
#ifdef EMU_F68K
{
void *oldcontext = g_m68kcontext;
g_m68kcontext = &PicoCpuFS68k;
memset(&PicoCpuFS68k, 0, sizeof(PicoCpuFS68k));
fm68k_init();
PicoCpuFS68k.iack_handler = SekIntAckFS68k;
PicoCpuFS68k.sr = 0x2704; // Z flag
g_m68kcontext = oldcontext;
}
#endif
}
@ -149,11 +144,7 @@ PICO_INTERNAL int SekResetS68k(void)
}
#endif
#ifdef EMU_F68K
{
void *oldcontext = g_m68kcontext;
fm68k_reset(&PicoCpuFS68k);
g_m68kcontext = oldcontext;
}
#endif
return 0;

1
pico/debugCPU.c
View file

@ -30,6 +30,7 @@ static struct Cyclone *currentC68k = NULL;
#define other_is_stopped() (currentC68k->state_flags&1)
#define other_is_tracing() ((currentC68k->state_flags&2)?1:0)
#elif defined(EMU_F68K)
static struct M68K_CONTEXT *g_m68kcontext;
#define other_set_sub(s) g_m68kcontext=(s)?&PicoCpuFS68k:&PicoCpuFM68k;
#define other_get_sr() g_m68kcontext->sr
#define other_dar(i) ((unsigned int*)g_m68kcontext->dreg)[i]

5
pico/sek.c
View file

@ -128,15 +128,10 @@ PICO_INTERNAL void SekInit(void)
}
#endif
#ifdef EMU_F68K
{
void *oldcontext = g_m68kcontext;
g_m68kcontext = &PicoCpuFM68k;
memset(&PicoCpuFM68k, 0, sizeof(PicoCpuFM68k));
fm68k_init();
PicoCpuFM68k.iack_handler = SekIntAckF68K;
PicoCpuFM68k.sr = 0x2704; // Z flag
g_m68kcontext = oldcontext;
}
#endif
}