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Merge pull request #686 from lioncash/vfp 

vfp: Minor cleanups
This commit is contained in:
bunnei 2015-04-06 21:21:59 -04:00
parent 14dcd98653 29a4b6c7ed
commit 11bd6024fb
6 changed files with 76 additions and 71 deletions
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15
src/core/arm/skyeye_common/arm_regformat.h
View File

@ -51,13 +51,18 @@ enum {
EXCLUSIVE_STATE, EXCLUSIVE_STATE,
EXCLUSIVE_RESULT, EXCLUSIVE_RESULT,
// VFP registers MAX_REG_NUM,
VFP_BASE, };
VFP_FPSID = VFP_BASE,
// VFP system registers
enum {
VFP_FPSID,
VFP_FPSCR, VFP_FPSCR,
VFP_FPEXC, VFP_FPEXC,
MAX_REG_NUM, // Not an actual register.
// All VFP system registers should be defined above this.
VFP_SYSTEM_REGISTER_COUNT
}; };
enum CP15Register { enum CP15Register {
@ -176,5 +181,3 @@ enum CP15Register {
// All registers should be defined above this. // All registers should be defined above this.
CP15_REGISTER_COUNT, CP15_REGISTER_COUNT,
}; };
#define VFP_OFFSET(x) (x - VFP_BASE)

4
src/core/arm/skyeye_common/armdefs.h
View File

@ -92,7 +92,9 @@ struct ARMul_State
ARMword exclusive_state; ARMword exclusive_state;
ARMword exclusive_result; ARMword exclusive_result;
ARMword CP15[CP15_REGISTER_COUNT]; ARMword CP15[CP15_REGISTER_COUNT];
ARMword VFP[3]; // FPSID, FPSCR, and FPEXC
// FPSID, FPSCR, and FPEXC
ARMword VFP[VFP_SYSTEM_REGISTER_COUNT];
// VFPv2 and VFPv3-D16 has 16 doubleword registers (D0-D16 or S0-S31). // VFPv2 and VFPv3-D16 has 16 doubleword registers (D0-D16 or S0-S31).
// VFPv3-D32/ASIMD may have up to 32 doubleword registers (D0-D31), // VFPv3-D32/ASIMD may have up to 32 doubleword registers (D0-D31),
// and only 32 singleword registers are accessible (S0-S31). // and only 32 singleword registers are accessible (S0-S31).

12
src/core/arm/skyeye_common/vfp/asm_vfp.h
View File

@ -7,15 +7,15 @@
#pragma once #pragma once
// FPSID Information // ARM11 MPCore FPSID Information
// Note that these are used as values and not as flags. // Note that these are used as values and not as flags.
enum : u32 { enum : u32 {
VFP_FPSID_IMPLMEN = 0, // Implementation code. Should be the same as cp15 0 c0 0 VFP_FPSID_IMPLMEN = 0x41, // Implementation code. Should be the same as cp15 0 c0 0
VFP_FPSID_SW = 0, // Software emulation bit value VFP_FPSID_SW = 0, // Software emulation bit value
VFP_FPSID_SUBARCH = 0x2, // Subarchitecture version number VFP_FPSID_SUBARCH = 0x1, // Subarchitecture version number
VFP_FPSID_PARTNUM = 0x1, // Part number VFP_FPSID_PARTNUM = 0x20, // Part number
VFP_FPSID_VARIANT = 0x1, // Variant number VFP_FPSID_VARIANT = 0xB, // Variant number
VFP_FPSID_REVISION = 0x1 // Revision number VFP_FPSID_REVISION = 0x4 // Revision number
}; };
// FPEXC bits // FPEXC bits

26
src/core/arm/skyeye_common/vfp/vfp.cpp
View File

@ -29,10 +29,10 @@
unsigned VFPInit(ARMul_State* state) unsigned VFPInit(ARMul_State* state)
{ {
state->VFP[VFP_OFFSET(VFP_FPSID)] = VFP_FPSID_IMPLMEN<<24 | VFP_FPSID_SW<<23 | VFP_FPSID_SUBARCH<<16 | state->VFP[VFP_FPSID] = VFP_FPSID_IMPLMEN<<24 | VFP_FPSID_SW<<23 | VFP_FPSID_SUBARCH<<16 |
VFP_FPSID_PARTNUM<<8 | VFP_FPSID_VARIANT<<4 | VFP_FPSID_REVISION; VFP_FPSID_PARTNUM<<8 | VFP_FPSID_VARIANT<<4 | VFP_FPSID_REVISION;
state->VFP[VFP_OFFSET(VFP_FPEXC)] = 0; state->VFP[VFP_FPEXC] = 0;
state->VFP[VFP_OFFSET(VFP_FPSCR)] = 0; state->VFP[VFP_FPSCR] = 0;
return 0; return 0;
} }
@ -314,11 +314,11 @@ unsigned VFPCDP(ARMul_State* state, unsigned type, u32 instr)
int exceptions = 0; int exceptions = 0;
if (CoProc == 10) if (CoProc == 10)
exceptions = vfp_single_cpdo(state, instr, state->VFP[VFP_OFFSET(VFP_FPSCR)]); exceptions = vfp_single_cpdo(state, instr, state->VFP[VFP_FPSCR]);
else else
exceptions = vfp_double_cpdo(state, instr, state->VFP[VFP_OFFSET(VFP_FPSCR)]); exceptions = vfp_double_cpdo(state, instr, state->VFP[VFP_FPSCR]);
vfp_raise_exceptions(state, exceptions, instr, state->VFP[VFP_OFFSET(VFP_FPSCR)]); vfp_raise_exceptions(state, exceptions, instr, state->VFP[VFP_FPSCR]);
return ARMul_DONE; return ARMul_DONE;
} }
@ -344,11 +344,11 @@ void VMRS(ARMul_State* state, ARMword reg, ARMword Rt, ARMword* value)
{ {
if (Rt != 15) if (Rt != 15)
{ {
*value = state->VFP[VFP_OFFSET(VFP_FPSCR)]; *value = state->VFP[VFP_FPSCR];
} }
else else
{ {
*value = state->VFP[VFP_OFFSET(VFP_FPSCR)] ; *value = state->VFP[VFP_FPSCR] ;
} }
} }
else else
@ -356,7 +356,7 @@ void VMRS(ARMul_State* state, ARMword reg, ARMword Rt, ARMword* value)
switch (reg) switch (reg)
{ {
case 0: case 0:
*value = state->VFP[VFP_OFFSET(VFP_FPSID)]; *value = state->VFP[VFP_FPSID];
break; break;
case 6: case 6:
/* MVFR1, VFPv3 only ? */ /* MVFR1, VFPv3 only ? */
@ -367,7 +367,7 @@ void VMRS(ARMul_State* state, ARMword reg, ARMword Rt, ARMword* value)
LOG_TRACE(Core_ARM11, "\tr%d <= MVFR0 unimplemented\n", Rt); LOG_TRACE(Core_ARM11, "\tr%d <= MVFR0 unimplemented\n", Rt);
break; break;
case 8: case 8:
*value = state->VFP[VFP_OFFSET(VFP_FPEXC)]; *value = state->VFP[VFP_FPEXC];
break; break;
default: default:
LOG_TRACE(Core_ARM11, "\tSUBARCHITECTURE DEFINED\n"); LOG_TRACE(Core_ARM11, "\tSUBARCHITECTURE DEFINED\n");
@ -407,11 +407,11 @@ void VMSR(ARMul_State* state, ARMword reg, ARMword Rt)
{ {
if (reg == 1) if (reg == 1)
{ {
state->VFP[VFP_OFFSET(VFP_FPSCR)] = state->Reg[Rt]; state->VFP[VFP_FPSCR] = state->Reg[Rt];
} }
else if (reg == 8) else if (reg == 8)
{ {
state->VFP[VFP_OFFSET(VFP_FPEXC)] = state->Reg[Rt]; state->VFP[VFP_FPEXC] = state->Reg[Rt];
} }
} }
@ -774,5 +774,5 @@ void vfp_raise_exceptions(ARMul_State* state, u32 exceptions, u32 inst, u32 fpsc
fpscr |= exceptions; fpscr |= exceptions;
state->VFP[VFP_OFFSET(VFP_FPSCR)] = fpscr; state->VFP[VFP_FPSCR] = fpscr;
} }

2
src/core/arm/skyeye_common/vfp/vfp.h
View File

@ -25,7 +25,7 @@
#define VFP_DEBUG_UNIMPLEMENTED(x) LOG_ERROR(Core_ARM11, "in func %s, " #x " unimplemented\n", __FUNCTION__); exit(-1); #define VFP_DEBUG_UNIMPLEMENTED(x) LOG_ERROR(Core_ARM11, "in func %s, " #x " unimplemented\n", __FUNCTION__); exit(-1);
#define VFP_DEBUG_UNTESTED(x) LOG_TRACE(Core_ARM11, "in func %s, " #x " untested\n", __FUNCTION__); #define VFP_DEBUG_UNTESTED(x) LOG_TRACE(Core_ARM11, "in func %s, " #x " untested\n", __FUNCTION__);
#define CHECK_VFP_ENABLED #define CHECK_VFP_ENABLED
#define CHECK_VFP_CDP_RET vfp_raise_exceptions(cpu, ret, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); //if (ret == -1) {printf("VFP CDP FAILURE %x\n", inst_cream->instr); exit(-1);} #define CHECK_VFP_CDP_RET vfp_raise_exceptions(cpu, ret, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
unsigned VFPInit(ARMul_State* state); unsigned VFPInit(ARMul_State* state);
unsigned VFPMRC(ARMul_State* state, unsigned type, ARMword instr, ARMword* value); unsigned VFPMRC(ARMul_State* state, unsigned type, ARMword instr, ARMword* value);

82
src/core/arm/skyeye_common/vfp/vfpinstr.cpp
View File

@ -46,9 +46,9 @@ VMLA_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -96,9 +96,9 @@ VMLS_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -146,9 +146,9 @@ VNMLA_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -197,9 +197,9 @@ VNMLS_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -247,9 +247,9 @@ VNMUL_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -297,9 +297,9 @@ VMUL_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -347,9 +347,9 @@ VADD_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -397,9 +397,9 @@ VSUB_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -447,9 +447,9 @@ VDIV_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -591,9 +591,9 @@ VABS_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -642,9 +642,9 @@ VNEG_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -692,9 +692,9 @@ VSQRT_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -742,9 +742,9 @@ VCMP_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -792,9 +792,9 @@ VCMP2_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -842,9 +842,9 @@ VCVTBDS_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -894,9 +894,9 @@ VCVTBFF_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -944,9 +944,9 @@ VCVTBFI_INST:
int ret; int ret;
if (inst_cream->dp_operation) if (inst_cream->dp_operation)
ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_double_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
else else
ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_OFFSET(VFP_FPSCR)]); ret = vfp_single_cpdo(cpu, inst_cream->instr, cpu->VFP[VFP_FPSCR]);
CHECK_VFP_CDP_RET; CHECK_VFP_CDP_RET;
} }
@ -1146,14 +1146,14 @@ VMRS_INST:
{ {
if (inst_cream->Rt != 15) if (inst_cream->Rt != 15)
{ {
cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_OFFSET(VFP_FPSCR)]; cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_FPSCR];
} }
else else
{ {
cpu->NFlag = (cpu->VFP[VFP_OFFSET(VFP_FPSCR)] >> 31) & 1; cpu->NFlag = (cpu->VFP[VFP_FPSCR] >> 31) & 1;
cpu->ZFlag = (cpu->VFP[VFP_OFFSET(VFP_FPSCR)] >> 30) & 1; cpu->ZFlag = (cpu->VFP[VFP_FPSCR] >> 30) & 1;
cpu->CFlag = (cpu->VFP[VFP_OFFSET(VFP_FPSCR)] >> 29) & 1; cpu->CFlag = (cpu->VFP[VFP_FPSCR] >> 29) & 1;
cpu->VFlag = (cpu->VFP[VFP_OFFSET(VFP_FPSCR)] >> 28) & 1; cpu->VFlag = (cpu->VFP[VFP_FPSCR] >> 28) & 1;
} }
} }
else else
@ -1161,7 +1161,7 @@ VMRS_INST:
switch (inst_cream->reg) switch (inst_cream->reg)
{ {
case 0: case 0:
cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_OFFSET(VFP_FPSID)]; cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_FPSID];
break; break;
case 6: case 6:
/* MVFR1, VFPv3 only ? */ /* MVFR1, VFPv3 only ? */
@ -1172,7 +1172,7 @@ VMRS_INST:
LOG_TRACE(Core_ARM11, "\tr%d <= MVFR0 unimplemented\n", inst_cream->Rt); LOG_TRACE(Core_ARM11, "\tr%d <= MVFR0 unimplemented\n", inst_cream->Rt);
break; break;
case 8: case 8:
cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_OFFSET(VFP_FPEXC)]; cpu->Reg[inst_cream->Rt] = cpu->VFP[VFP_FPEXC];
break; break;
default: default:
break; break;