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linux-pinenote/arch/s390/math-emu/math.c
Martin Schwidefsky 4725c86055 s390: fix save and restore of the floating-point-control register 
The FPC_VALID_MASK has been used to check the validity of the value
to be loaded into the floating-point-control register. With the
introduction of the floating-point extension facility and the
decimal-floating-point additional bits have been defined which need
to be checked in a non straight forward way. So far these bits have
been ignored which can cause an incorrect results for decimal-
floating-point operations, e.g. an incorrect rounding mode to be
set after signal return.

The static check with the FPC_VALID_MASK is replaced with a trial
load of the floating-point-control value, see test_fp_ctl.

In addition an information leak with the padding word between the
floating-point-control word and the floating-point registers in
the s390_fp_regs is fixed.

Reported-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Reviewed-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
2013-10-24 17:17:11 +02:00

2255 lines
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/*
* S390 version
* Copyright IBM Corp. 1999, 2001
* Author(s): Martin Schwidefsky (schwidefsky@de.ibm.com),
*
* 'math.c' emulates IEEE instructions on a S390 processor
* that does not have the IEEE fpu (all processors before G5).
*/
#include <linux/types.h>
#include <linux/sched.h>
#include <linux/mm.h>
#include <asm/uaccess.h>
#include <asm/lowcore.h>
#include <asm/sfp-util.h>
#include <math-emu/soft-fp.h>
#include <math-emu/single.h>
#include <math-emu/double.h>
#include <math-emu/quad.h>
#define FPC_VALID_MASK 0xF8F8FF03
/*
* I miss a macro to round a floating point number to the
* nearest integer in the same floating point format.
*/
#define _FP_TO_FPINT_ROUND(fs, wc, X) \
do { \
switch (X##_c) \
{ \
case FP_CLS_NORMAL: \
if (X##_e > _FP_FRACBITS_##fs + _FP_EXPBIAS_##fs) \
{ /* floating point number has no bits after the dot. */ \
} \
else if (X##_e <= _FP_FRACBITS_##fs + _FP_EXPBIAS_##fs && \
X##_e > _FP_EXPBIAS_##fs) \
{ /* some bits before the dot, some after it. */ \
_FP_FRAC_SRS_##wc(X, _FP_WFRACBITS_##fs, \
X##_e - _FP_EXPBIAS_##fs \
+ _FP_FRACBITS_##fs); \
_FP_ROUND(wc, X); \
_FP_FRAC_SLL_##wc(X, X##_e - _FP_EXPBIAS_##fs \
+ _FP_FRACBITS_##fs); \
} \
else \
{ /* all bits after the dot. */ \
FP_SET_EXCEPTION(FP_EX_INEXACT); \
X##_c = FP_CLS_ZERO; \
} \
break; \
case FP_CLS_NAN: \
case FP_CLS_INF: \
case FP_CLS_ZERO: \
break; \
} \
} while (0)
#define FP_TO_FPINT_ROUND_S(X) _FP_TO_FPINT_ROUND(S,1,X)
#define FP_TO_FPINT_ROUND_D(X) _FP_TO_FPINT_ROUND(D,2,X)
#define FP_TO_FPINT_ROUND_Q(X) _FP_TO_FPINT_ROUND(Q,4,X)
typedef union {
long double ld;
struct {
__u64 high;
__u64 low;
} w;
} mathemu_ldcv;
#ifdef CONFIG_SYSCTL
int sysctl_ieee_emulation_warnings=1;
#endif
#define mathemu_put_user(x, p) \
do { \
if (put_user((x),(p))) \
return SIGSEGV; \
} while (0)
#define mathemu_get_user(x, p) \
do { \
if (get_user((x),(p))) \
return SIGSEGV; \
} while (0)
#define mathemu_copy_from_user(d, s, n)\
do { \
if (copy_from_user((d),(s),(n)) != 0) \
return SIGSEGV; \
} while (0)
#define mathemu_copy_to_user(d, s, n) \
do { \
if (copy_to_user((d),(s),(n)) != 0) \
return SIGSEGV; \
} while (0)
static void display_emulation_not_implemented(struct pt_regs *regs, char *instr)
{
__u16 *location;
#ifdef CONFIG_SYSCTL
if(sysctl_ieee_emulation_warnings)
#endif
{
location = (__u16 *)(regs->psw.addr-S390_lowcore.pgm_ilc);
printk("%s ieee fpu instruction not emulated "
"process name: %s pid: %d \n",
instr, current->comm, current->pid);
printk("%s's PSW: %08lx %08lx\n", instr,
(unsigned long) regs->psw.mask,
(unsigned long) location);
}
}
static inline void emu_set_CC (struct pt_regs *regs, int cc)
{
regs->psw.mask = (regs->psw.mask & 0xFFFFCFFF) | ((cc&3) << 12);
}
/*
* Set the condition code in the user psw.
* 0 : Result is zero
* 1 : Result is less than zero
* 2 : Result is greater than zero
* 3 : Result is NaN or INF
*/
static inline void emu_set_CC_cs(struct pt_regs *regs, int class, int sign)
{
switch (class) {
case FP_CLS_NORMAL:
case FP_CLS_INF:
emu_set_CC(regs, sign ? 1 : 2);
break;
case FP_CLS_ZERO:
emu_set_CC(regs, 0);
break;
case FP_CLS_NAN:
emu_set_CC(regs, 3);
break;
}
}
/* Add long double */
static int emu_axbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QB, &cvt.ld);
FP_ADD_Q(QR, QA, QB);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
emu_set_CC_cs(regs, QR_c, QR_s);
return _fex;
}
/* Add double */
static int emu_adbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_ADD_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Add double */
static int emu_adb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, val);
FP_ADD_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Add float */
static int emu_aebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_ADD_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Add float */
static int emu_aeb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, val);
FP_ADD_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Compare long double */
static int emu_cxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QB);
mathemu_ldcv cvt;
int IR;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_RAW_QP(QA, &cvt.ld);
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_RAW_QP(QB, &cvt.ld);
FP_CMP_Q(IR, QA, QB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
return 0;
}
/* Compare double */
static int emu_cdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DB);
int IR;
FP_UNPACK_RAW_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_RAW_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_CMP_D(IR, DA, DB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
return 0;
}
/* Compare double */
static int emu_cdb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DB);
int IR;
FP_UNPACK_RAW_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_RAW_DP(DB, val);
FP_CMP_D(IR, DA, DB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
return 0;
}
/* Compare float */
static int emu_cebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SB);
int IR;
FP_UNPACK_RAW_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_RAW_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_CMP_S(IR, SA, SB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
return 0;
}
/* Compare float */
static int emu_ceb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SB);
int IR;
FP_UNPACK_RAW_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_RAW_SP(SB, val);
FP_CMP_S(IR, SA, SB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
return 0;
}
/* Compare and signal long double */
static int emu_kxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QB);
FP_DECL_EX;
mathemu_ldcv cvt;
int IR;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_RAW_QP(QA, &cvt.ld);
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QB, &cvt.ld);
FP_CMP_Q(IR, QA, QB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
if (IR == 3)
FP_SET_EXCEPTION (FP_EX_INVALID);
return _fex;
}
/* Compare and signal double */
static int emu_kdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DB);
FP_DECL_EX;
int IR;
FP_UNPACK_RAW_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_RAW_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_CMP_D(IR, DA, DB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
if (IR == 3)
FP_SET_EXCEPTION (FP_EX_INVALID);
return _fex;
}
/* Compare and signal double */
static int emu_kdb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DB);
FP_DECL_EX;
int IR;
FP_UNPACK_RAW_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_RAW_DP(DB, val);
FP_CMP_D(IR, DA, DB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
if (IR == 3)
FP_SET_EXCEPTION (FP_EX_INVALID);
return _fex;
}
/* Compare and signal float */
static int emu_kebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SB);
FP_DECL_EX;
int IR;
FP_UNPACK_RAW_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_RAW_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_CMP_S(IR, SA, SB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
if (IR == 3)
FP_SET_EXCEPTION (FP_EX_INVALID);
return _fex;
}
/* Compare and signal float */
static int emu_keb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SB);
FP_DECL_EX;
int IR;
FP_UNPACK_RAW_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_RAW_SP(SB, val);
FP_CMP_S(IR, SA, SB, 3);
/*
* IR == -1 if DA < DB, IR == 0 if DA == DB,
* IR == 1 if DA > DB and IR == 3 if unorderded
*/
emu_set_CC(regs, (IR == -1) ? 1 : (IR == 1) ? 2 : IR);
if (IR == 3)
FP_SET_EXCEPTION (FP_EX_INVALID);
return _fex;
}
/* Convert from fixed long double */
static int emu_cxfbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
__s32 si;
int mode;
mode = current->thread.fp_regs.fpc & 3;
si = regs->gprs[ry];
FP_FROM_INT_Q(QR, si, 32, int);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Convert from fixed double */
static int emu_cdfbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DR);
FP_DECL_EX;
__s32 si;
int mode;
mode = current->thread.fp_regs.fpc & 3;
si = regs->gprs[ry];
FP_FROM_INT_D(DR, si, 32, int);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Convert from fixed float */
static int emu_cefbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SR);
FP_DECL_EX;
__s32 si;
int mode;
mode = current->thread.fp_regs.fpc & 3;
si = regs->gprs[ry];
FP_FROM_INT_S(SR, si, 32, int);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Convert to fixed long double */
static int emu_cfxbr (struct pt_regs *regs, int rx, int ry, int mask) {
FP_DECL_Q(QA);
FP_DECL_EX;
mathemu_ldcv cvt;
__s32 si;
int mode;
if (mask == 0)
mode = current->thread.fp_regs.fpc & 3;
else if (mask == 1)
mode = FP_RND_NEAREST;
else
mode = mask - 4;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_TO_INT_ROUND_Q(si, QA, 32, 1);
regs->gprs[rx] = si;
emu_set_CC_cs(regs, QA_c, QA_s);
return _fex;
}
/* Convert to fixed double */
static int emu_cfdbr (struct pt_regs *regs, int rx, int ry, int mask) {
FP_DECL_D(DA);
FP_DECL_EX;
__s32 si;
int mode;
if (mask == 0)
mode = current->thread.fp_regs.fpc & 3;
else if (mask == 1)
mode = FP_RND_NEAREST;
else
mode = mask - 4;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
FP_TO_INT_ROUND_D(si, DA, 32, 1);
regs->gprs[rx] = si;
emu_set_CC_cs(regs, DA_c, DA_s);
return _fex;
}
/* Convert to fixed float */
static int emu_cfebr (struct pt_regs *regs, int rx, int ry, int mask) {
FP_DECL_S(SA);
FP_DECL_EX;
__s32 si;
int mode;
if (mask == 0)
mode = current->thread.fp_regs.fpc & 3;
else if (mask == 1)
mode = FP_RND_NEAREST;
else
mode = mask - 4;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
FP_TO_INT_ROUND_S(si, SA, 32, 1);
regs->gprs[rx] = si;
emu_set_CC_cs(regs, SA_c, SA_s);
return _fex;
}
/* Divide long double */
static int emu_dxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QB, &cvt.ld);
FP_DIV_Q(QR, QA, QB);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Divide double */
static int emu_ddbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_DIV_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Divide double */
static int emu_ddb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, val);
FP_DIV_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Divide float */
static int emu_debr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_DIV_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Divide float */
static int emu_deb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, val);
FP_DIV_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Divide to integer double */
static int emu_didbr (struct pt_regs *regs, int rx, int ry, int mask) {
display_emulation_not_implemented(regs, "didbr");
return 0;
}
/* Divide to integer float */
static int emu_diebr (struct pt_regs *regs, int rx, int ry, int mask) {
display_emulation_not_implemented(regs, "diebr");
return 0;
}
/* Extract fpc */
static int emu_efpc (struct pt_regs *regs, int rx, int ry) {
regs->gprs[rx] = current->thread.fp_regs.fpc;
return 0;
}
/* Load and test long double */
static int emu_ltxbr (struct pt_regs *regs, int rx, int ry) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
mathemu_ldcv cvt;
FP_DECL_Q(QA);
FP_DECL_EX;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
fp_regs->fprs[rx].ui = fp_regs->fprs[ry].ui;
fp_regs->fprs[rx+2].ui = fp_regs->fprs[ry+2].ui;
emu_set_CC_cs(regs, QA_c, QA_s);
return _fex;
}
/* Load and test double */
static int emu_ltdbr (struct pt_regs *regs, int rx, int ry) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
FP_DECL_D(DA);
FP_DECL_EX;
FP_UNPACK_DP(DA, &fp_regs->fprs[ry].d);
fp_regs->fprs[rx].ui = fp_regs->fprs[ry].ui;
emu_set_CC_cs(regs, DA_c, DA_s);
return _fex;
}
/* Load and test double */
static int emu_ltebr (struct pt_regs *regs, int rx, int ry) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
FP_DECL_S(SA);
FP_DECL_EX;
FP_UNPACK_SP(SA, &fp_regs->fprs[ry].f);
fp_regs->fprs[rx].ui = fp_regs->fprs[ry].ui;
emu_set_CC_cs(regs, SA_c, SA_s);
return _fex;
}
/* Load complement long double */
static int emu_lcxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_NEG_Q(QR, QA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
emu_set_CC_cs(regs, QR_c, QR_s);
return _fex;
}
/* Load complement double */
static int emu_lcdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
FP_NEG_D(DR, DA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Load complement float */
static int emu_lcebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
FP_NEG_S(SR, SA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Load floating point integer long double */
static int emu_fixbr (struct pt_regs *regs, int rx, int ry, int mask) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
FP_DECL_Q(QA);
FP_DECL_EX;
mathemu_ldcv cvt;
__s32 si;
int mode;
if (mask == 0)
mode = fp_regs->fpc & 3;
else if (mask == 1)
mode = FP_RND_NEAREST;
else
mode = mask - 4;
cvt.w.high = fp_regs->fprs[ry].ui;
cvt.w.low = fp_regs->fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_TO_FPINT_ROUND_Q(QA);
FP_PACK_QP(&cvt.ld, QA);
fp_regs->fprs[rx].ui = cvt.w.high;
fp_regs->fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Load floating point integer double */
static int emu_fidbr (struct pt_regs *regs, int rx, int ry, int mask) {
/* FIXME: rounding mode !! */
s390_fp_regs *fp_regs = &current->thread.fp_regs;
FP_DECL_D(DA);
FP_DECL_EX;
__s32 si;
int mode;
if (mask == 0)
mode = fp_regs->fpc & 3;
else if (mask == 1)
mode = FP_RND_NEAREST;
else
mode = mask - 4;
FP_UNPACK_DP(DA, &fp_regs->fprs[ry].d);
FP_TO_FPINT_ROUND_D(DA);
FP_PACK_DP(&fp_regs->fprs[rx].d, DA);
return _fex;
}
/* Load floating point integer float */
static int emu_fiebr (struct pt_regs *regs, int rx, int ry, int mask) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
FP_DECL_S(SA);
FP_DECL_EX;
__s32 si;
int mode;
if (mask == 0)
mode = fp_regs->fpc & 3;
else if (mask == 1)
mode = FP_RND_NEAREST;
else
mode = mask - 4;
FP_UNPACK_SP(SA, &fp_regs->fprs[ry].f);
FP_TO_FPINT_ROUND_S(SA);
FP_PACK_SP(&fp_regs->fprs[rx].f, SA);
return _fex;
}
/* Load lengthened double to long double */
static int emu_lxdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
FP_CONV (Q, D, 4, 2, QR, DA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Load lengthened double to long double */
static int emu_lxdb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, val);
FP_CONV (Q, D, 4, 2, QR, DA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Load lengthened float to long double */
static int emu_lxebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
FP_CONV (Q, S, 4, 1, QR, SA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Load lengthened float to long double */
static int emu_lxeb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, val);
FP_CONV (Q, S, 4, 1, QR, SA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Load lengthened float to double */
static int emu_ldebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
FP_CONV (D, S, 2, 1, DR, SA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Load lengthened float to double */
static int emu_ldeb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, val);
FP_CONV (D, S, 2, 1, DR, SA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Load negative long double */
static int emu_lnxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
if (QA_s == 0) {
FP_NEG_Q(QR, QA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
} else {
current->thread.fp_regs.fprs[rx].ui =
current->thread.fp_regs.fprs[ry].ui;
current->thread.fp_regs.fprs[rx+2].ui =
current->thread.fp_regs.fprs[ry+2].ui;
}
emu_set_CC_cs(regs, QR_c, QR_s);
return _fex;
}
/* Load negative double */
static int emu_lndbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
if (DA_s == 0) {
FP_NEG_D(DR, DA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
} else
current->thread.fp_regs.fprs[rx].ui =
current->thread.fp_regs.fprs[ry].ui;
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Load negative float */
static int emu_lnebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
if (SA_s == 0) {
FP_NEG_S(SR, SA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
} else
current->thread.fp_regs.fprs[rx].ui =
current->thread.fp_regs.fprs[ry].ui;
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Load positive long double */
static int emu_lpxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
if (QA_s != 0) {
FP_NEG_Q(QR, QA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
} else{
current->thread.fp_regs.fprs[rx].ui =
current->thread.fp_regs.fprs[ry].ui;
current->thread.fp_regs.fprs[rx+2].ui =
current->thread.fp_regs.fprs[ry+2].ui;
}
emu_set_CC_cs(regs, QR_c, QR_s);
return _fex;
}
/* Load positive double */
static int emu_lpdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
if (DA_s != 0) {
FP_NEG_D(DR, DA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
} else
current->thread.fp_regs.fprs[rx].ui =
current->thread.fp_regs.fprs[ry].ui;
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Load positive float */
static int emu_lpebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
if (SA_s != 0) {
FP_NEG_S(SR, SA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
} else
current->thread.fp_regs.fprs[rx].ui =
current->thread.fp_regs.fprs[ry].ui;
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Load rounded long double to double */
static int emu_ldxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_D(DR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_CONV (D, Q, 2, 4, DR, QA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].f, DR);
return _fex;
}
/* Load rounded long double to float */
static int emu_lexbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_S(SR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_CONV (S, Q, 1, 4, SR, QA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Load rounded double to float */
static int emu_ledbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
FP_CONV (S, D, 1, 2, SR, DA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Multiply long double */
static int emu_mxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QB, &cvt.ld);
FP_MUL_Q(QR, QA, QB);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Multiply double */
static int emu_mdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_MUL_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Multiply double */
static int emu_mdb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, val);
FP_MUL_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Multiply double to long double */
static int emu_mxdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_CONV (Q, D, 4, 2, QA, DA);
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
FP_CONV (Q, D, 4, 2, QB, DA);
FP_MUL_Q(QR, QA, QB);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Multiply double to long double */
static int emu_mxdb (struct pt_regs *regs, int rx, long double *val) {
FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_UNPACK_QP(QB, val);
FP_MUL_Q(QR, QA, QB);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
return _fex;
}
/* Multiply float */
static int emu_meebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_MUL_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Multiply float */
static int emu_meeb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, val);
FP_MUL_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
return _fex;
}
/* Multiply float to double */
static int emu_mdebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_CONV (D, S, 2, 1, DA, SA);
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
FP_CONV (D, S, 2, 1, DB, SA);
FP_MUL_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Multiply float to double */
static int emu_mdeb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_CONV (D, S, 2, 1, DA, SA);
FP_UNPACK_SP(SA, val);
FP_CONV (D, S, 2, 1, DB, SA);
FP_MUL_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
return _fex;
}
/* Multiply and add double */
static int emu_madbr (struct pt_regs *regs, int rx, int ry, int rz) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DC); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_UNPACK_DP(DC, &current->thread.fp_regs.fprs[rz].d);
FP_MUL_D(DR, DA, DB);
FP_ADD_D(DR, DR, DC);
FP_PACK_DP(&current->thread.fp_regs.fprs[rz].d, DR);
return _fex;
}
/* Multiply and add double */
static int emu_madb (struct pt_regs *regs, int rx, double *val, int rz) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DC); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, val);
FP_UNPACK_DP(DC, &current->thread.fp_regs.fprs[rz].d);
FP_MUL_D(DR, DA, DB);
FP_ADD_D(DR, DR, DC);
FP_PACK_DP(&current->thread.fp_regs.fprs[rz].d, DR);
return _fex;
}
/* Multiply and add float */
static int emu_maebr (struct pt_regs *regs, int rx, int ry, int rz) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SC); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_UNPACK_SP(SC, &current->thread.fp_regs.fprs[rz].f);
FP_MUL_S(SR, SA, SB);
FP_ADD_S(SR, SR, SC);
FP_PACK_SP(&current->thread.fp_regs.fprs[rz].f, SR);
return _fex;
}
/* Multiply and add float */
static int emu_maeb (struct pt_regs *regs, int rx, float *val, int rz) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SC); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, val);
FP_UNPACK_SP(SC, &current->thread.fp_regs.fprs[rz].f);
FP_MUL_S(SR, SA, SB);
FP_ADD_S(SR, SR, SC);
FP_PACK_SP(&current->thread.fp_regs.fprs[rz].f, SR);
return _fex;
}
/* Multiply and subtract double */
static int emu_msdbr (struct pt_regs *regs, int rx, int ry, int rz) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DC); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_UNPACK_DP(DC, &current->thread.fp_regs.fprs[rz].d);
FP_MUL_D(DR, DA, DB);
FP_SUB_D(DR, DR, DC);
FP_PACK_DP(&current->thread.fp_regs.fprs[rz].d, DR);
return _fex;
}
/* Multiply and subtract double */
static int emu_msdb (struct pt_regs *regs, int rx, double *val, int rz) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DC); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, val);
FP_UNPACK_DP(DC, &current->thread.fp_regs.fprs[rz].d);
FP_MUL_D(DR, DA, DB);
FP_SUB_D(DR, DR, DC);
FP_PACK_DP(&current->thread.fp_regs.fprs[rz].d, DR);
return _fex;
}
/* Multiply and subtract float */
static int emu_msebr (struct pt_regs *regs, int rx, int ry, int rz) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SC); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_UNPACK_SP(SC, &current->thread.fp_regs.fprs[rz].f);
FP_MUL_S(SR, SA, SB);
FP_SUB_S(SR, SR, SC);
FP_PACK_SP(&current->thread.fp_regs.fprs[rz].f, SR);
return _fex;
}
/* Multiply and subtract float */
static int emu_mseb (struct pt_regs *regs, int rx, float *val, int rz) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SC); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, val);
FP_UNPACK_SP(SC, &current->thread.fp_regs.fprs[rz].f);
FP_MUL_S(SR, SA, SB);
FP_SUB_S(SR, SR, SC);
FP_PACK_SP(&current->thread.fp_regs.fprs[rz].f, SR);
return _fex;
}
/* Set floating point control word */
static int emu_sfpc (struct pt_regs *regs, int rx, int ry) {
__u32 temp;
temp = regs->gprs[rx];
if ((temp & ~FPC_VALID_MASK) != 0)
return SIGILL;
current->thread.fp_regs.fpc = temp;
return 0;
}
/* Square root long double */
static int emu_sqxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
FP_SQRT_Q(QR, QA);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
emu_set_CC_cs(regs, QR_c, QR_s);
return _fex;
}
/* Square root double */
static int emu_sqdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[ry].d);
FP_SQRT_D(DR, DA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Square root double */
static int emu_sqdb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, val);
FP_SQRT_D(DR, DA);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Square root float */
static int emu_sqebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[ry].f);
FP_SQRT_S(SR, SA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Square root float */
static int emu_sqeb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, val);
FP_SQRT_S(SR, SA);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Subtract long double */
static int emu_sxbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_Q(QA); FP_DECL_Q(QB); FP_DECL_Q(QR);
FP_DECL_EX;
mathemu_ldcv cvt;
int mode;
mode = current->thread.fp_regs.fpc & 3;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_QP(QA, &cvt.ld);
cvt.w.high = current->thread.fp_regs.fprs[ry].ui;
cvt.w.low = current->thread.fp_regs.fprs[ry+2].ui;
FP_UNPACK_QP(QB, &cvt.ld);
FP_SUB_Q(QR, QA, QB);
FP_PACK_QP(&cvt.ld, QR);
current->thread.fp_regs.fprs[rx].ui = cvt.w.high;
current->thread.fp_regs.fprs[rx+2].ui = cvt.w.low;
emu_set_CC_cs(regs, QR_c, QR_s);
return _fex;
}
/* Subtract double */
static int emu_sdbr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, &current->thread.fp_regs.fprs[ry].d);
FP_SUB_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Subtract double */
static int emu_sdb (struct pt_regs *regs, int rx, double *val) {
FP_DECL_D(DA); FP_DECL_D(DB); FP_DECL_D(DR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_DP(DA, &current->thread.fp_regs.fprs[rx].d);
FP_UNPACK_DP(DB, val);
FP_SUB_D(DR, DA, DB);
FP_PACK_DP(&current->thread.fp_regs.fprs[rx].d, DR);
emu_set_CC_cs(regs, DR_c, DR_s);
return _fex;
}
/* Subtract float */
static int emu_sebr (struct pt_regs *regs, int rx, int ry) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, &current->thread.fp_regs.fprs[ry].f);
FP_SUB_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Subtract float */
static int emu_seb (struct pt_regs *regs, int rx, float *val) {
FP_DECL_S(SA); FP_DECL_S(SB); FP_DECL_S(SR);
FP_DECL_EX;
int mode;
mode = current->thread.fp_regs.fpc & 3;
FP_UNPACK_SP(SA, &current->thread.fp_regs.fprs[rx].f);
FP_UNPACK_SP(SB, val);
FP_SUB_S(SR, SA, SB);
FP_PACK_SP(&current->thread.fp_regs.fprs[rx].f, SR);
emu_set_CC_cs(regs, SR_c, SR_s);
return _fex;
}
/* Test data class long double */
static int emu_tcxb (struct pt_regs *regs, int rx, long val) {
FP_DECL_Q(QA);
mathemu_ldcv cvt;
int bit;
cvt.w.high = current->thread.fp_regs.fprs[rx].ui;
cvt.w.low = current->thread.fp_regs.fprs[rx+2].ui;
FP_UNPACK_RAW_QP(QA, &cvt.ld);
switch (QA_e) {
default:
bit = 8; /* normalized number */
break;
case 0:
if (_FP_FRAC_ZEROP_4(QA))
bit = 10; /* zero */
else
bit = 6; /* denormalized number */
break;
case _FP_EXPMAX_Q:
if (_FP_FRAC_ZEROP_4(QA))
bit = 4; /* infinity */
else if (_FP_FRAC_HIGH_RAW_Q(QA) & _FP_QNANBIT_Q)
bit = 2; /* quiet NAN */
else
bit = 0; /* signaling NAN */
break;
}
if (!QA_s)
bit++;
emu_set_CC(regs, ((__u32) val >> bit) & 1);
return 0;
}
/* Test data class double */
static int emu_tcdb (struct pt_regs *regs, int rx, long val) {
FP_DECL_D(DA);
int bit;
FP_UNPACK_RAW_DP(DA, &current->thread.fp_regs.fprs[rx].d);
switch (DA_e) {
default:
bit = 8; /* normalized number */
break;
case 0:
if (_FP_FRAC_ZEROP_2(DA))
bit = 10; /* zero */
else
bit = 6; /* denormalized number */
break;
case _FP_EXPMAX_D:
if (_FP_FRAC_ZEROP_2(DA))
bit = 4; /* infinity */
else if (_FP_FRAC_HIGH_RAW_D(DA) & _FP_QNANBIT_D)
bit = 2; /* quiet NAN */
else
bit = 0; /* signaling NAN */
break;
}
if (!DA_s)
bit++;
emu_set_CC(regs, ((__u32) val >> bit) & 1);
return 0;
}
/* Test data class float */
static int emu_tceb (struct pt_regs *regs, int rx, long val) {
FP_DECL_S(SA);
int bit;
FP_UNPACK_RAW_SP(SA, &current->thread.fp_regs.fprs[rx].f);
switch (SA_e) {
default:
bit = 8; /* normalized number */
break;
case 0:
if (_FP_FRAC_ZEROP_1(SA))
bit = 10; /* zero */
else
bit = 6; /* denormalized number */
break;
case _FP_EXPMAX_S:
if (_FP_FRAC_ZEROP_1(SA))
bit = 4; /* infinity */
else if (_FP_FRAC_HIGH_RAW_S(SA) & _FP_QNANBIT_S)
bit = 2; /* quiet NAN */
else
bit = 0; /* signaling NAN */
break;
}
if (!SA_s)
bit++;
emu_set_CC(regs, ((__u32) val >> bit) & 1);
return 0;
}
static inline void emu_load_regd(int reg) {
if ((reg&9) != 0) /* test if reg in {0,2,4,6} */
return;
asm volatile( /* load reg from fp_regs.fprs[reg] */
" bras 1,0f\n"
" ld 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" (reg<<4),"a" (&current->thread.fp_regs.fprs[reg].d)
: "1");
}
static inline void emu_load_rege(int reg) {
if ((reg&9) != 0) /* test if reg in {0,2,4,6} */
return;
asm volatile( /* load reg from fp_regs.fprs[reg] */
" bras 1,0f\n"
" le 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" (reg<<4), "a" (&current->thread.fp_regs.fprs[reg].f)
: "1");
}
static inline void emu_store_regd(int reg) {
if ((reg&9) != 0) /* test if reg in {0,2,4,6} */
return;
asm volatile( /* store reg to fp_regs.fprs[reg] */
" bras 1,0f\n"
" std 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" (reg<<4), "a" (&current->thread.fp_regs.fprs[reg].d)
: "1");
}
static inline void emu_store_rege(int reg) {
if ((reg&9) != 0) /* test if reg in {0,2,4,6} */
return;
asm volatile( /* store reg to fp_regs.fprs[reg] */
" bras 1,0f\n"
" ste 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" (reg<<4), "a" (&current->thread.fp_regs.fprs[reg].f)
: "1");
}
int math_emu_b3(__u8 *opcode, struct pt_regs * regs) {
int _fex = 0;
static const __u8 format_table[256] = {
[0x00] = 0x03,[0x01] = 0x03,[0x02] = 0x03,[0x03] = 0x03,
[0x04] = 0x0f,[0x05] = 0x0d,[0x06] = 0x0e,[0x07] = 0x0d,
[0x08] = 0x03,[0x09] = 0x03,[0x0a] = 0x03,[0x0b] = 0x03,
[0x0c] = 0x0f,[0x0d] = 0x03,[0x0e] = 0x06,[0x0f] = 0x06,
[0x10] = 0x02,[0x11] = 0x02,[0x12] = 0x02,[0x13] = 0x02,
[0x14] = 0x03,[0x15] = 0x02,[0x16] = 0x01,[0x17] = 0x03,
[0x18] = 0x02,[0x19] = 0x02,[0x1a] = 0x02,[0x1b] = 0x02,
[0x1c] = 0x02,[0x1d] = 0x02,[0x1e] = 0x05,[0x1f] = 0x05,
[0x40] = 0x01,[0x41] = 0x01,[0x42] = 0x01,[0x43] = 0x01,
[0x44] = 0x12,[0x45] = 0x0d,[0x46] = 0x11,[0x47] = 0x04,
[0x48] = 0x01,[0x49] = 0x01,[0x4a] = 0x01,[0x4b] = 0x01,
[0x4c] = 0x01,[0x4d] = 0x01,[0x53] = 0x06,[0x57] = 0x06,
[0x5b] = 0x05,[0x5f] = 0x05,[0x84] = 0x13,[0x8c] = 0x13,
[0x94] = 0x09,[0x95] = 0x08,[0x96] = 0x07,[0x98] = 0x0c,
[0x99] = 0x0b,[0x9a] = 0x0a
};
static const void *jump_table[256]= {
[0x00] = emu_lpebr,[0x01] = emu_lnebr,[0x02] = emu_ltebr,
[0x03] = emu_lcebr,[0x04] = emu_ldebr,[0x05] = emu_lxdbr,
[0x06] = emu_lxebr,[0x07] = emu_mxdbr,[0x08] = emu_kebr,
[0x09] = emu_cebr, [0x0a] = emu_aebr, [0x0b] = emu_sebr,
[0x0c] = emu_mdebr,[0x0d] = emu_debr, [0x0e] = emu_maebr,
[0x0f] = emu_msebr,[0x10] = emu_lpdbr,[0x11] = emu_lndbr,
[0x12] = emu_ltdbr,[0x13] = emu_lcdbr,[0x14] = emu_sqebr,
[0x15] = emu_sqdbr,[0x16] = emu_sqxbr,[0x17] = emu_meebr,
[0x18] = emu_kdbr, [0x19] = emu_cdbr, [0x1a] = emu_adbr,
[0x1b] = emu_sdbr, [0x1c] = emu_mdbr, [0x1d] = emu_ddbr,
[0x1e] = emu_madbr,[0x1f] = emu_msdbr,[0x40] = emu_lpxbr,
[0x41] = emu_lnxbr,[0x42] = emu_ltxbr,[0x43] = emu_lcxbr,
[0x44] = emu_ledbr,[0x45] = emu_ldxbr,[0x46] = emu_lexbr,
[0x47] = emu_fixbr,[0x48] = emu_kxbr, [0x49] = emu_cxbr,
[0x4a] = emu_axbr, [0x4b] = emu_sxbr, [0x4c] = emu_mxbr,
[0x4d] = emu_dxbr, [0x53] = emu_diebr,[0x57] = emu_fiebr,
[0x5b] = emu_didbr,[0x5f] = emu_fidbr,[0x84] = emu_sfpc,
[0x8c] = emu_efpc, [0x94] = emu_cefbr,[0x95] = emu_cdfbr,
[0x96] = emu_cxfbr,[0x98] = emu_cfebr,[0x99] = emu_cfdbr,
[0x9a] = emu_cfxbr
};
switch (format_table[opcode[1]]) {
case 1: /* RRE format, long double operation */
if (opcode[3] & 0x22)
return SIGILL;
emu_store_regd((opcode[3] >> 4) & 15);
emu_store_regd(((opcode[3] >> 4) & 15) + 2);
emu_store_regd(opcode[3] & 15);
emu_store_regd((opcode[3] & 15) + 2);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *,int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(((opcode[3] >> 4) & 15) + 2);
emu_load_regd(opcode[3] & 15);
emu_load_regd((opcode[3] & 15) + 2);
break;
case 2: /* RRE format, double operation */
emu_store_regd((opcode[3] >> 4) & 15);
emu_store_regd(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(opcode[3] & 15);
break;
case 3: /* RRE format, float operation */
emu_store_rege((opcode[3] >> 4) & 15);
emu_store_rege(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_rege((opcode[3] >> 4) & 15);
emu_load_rege(opcode[3] & 15);
break;
case 4: /* RRF format, long double operation */
if (opcode[3] & 0x22)
return SIGILL;
emu_store_regd((opcode[3] >> 4) & 15);
emu_store_regd(((opcode[3] >> 4) & 15) + 2);
emu_store_regd(opcode[3] & 15);
emu_store_regd((opcode[3] & 15) + 2);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15, opcode[2] >> 4);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(((opcode[3] >> 4) & 15) + 2);
emu_load_regd(opcode[3] & 15);
emu_load_regd((opcode[3] & 15) + 2);
break;
case 5: /* RRF format, double operation */
emu_store_regd((opcode[2] >> 4) & 15);
emu_store_regd((opcode[3] >> 4) & 15);
emu_store_regd(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15, opcode[2] >> 4);
emu_load_regd((opcode[2] >> 4) & 15);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(opcode[3] & 15);
break;
case 6: /* RRF format, float operation */
emu_store_rege((opcode[2] >> 4) & 15);
emu_store_rege((opcode[3] >> 4) & 15);
emu_store_rege(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15, opcode[2] >> 4);
emu_load_rege((opcode[2] >> 4) & 15);
emu_load_rege((opcode[3] >> 4) & 15);
emu_load_rege(opcode[3] & 15);
break;
case 7: /* RRE format, cxfbr instruction */
/* call the emulation function */
if (opcode[3] & 0x20)
return SIGILL;
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(((opcode[3] >> 4) & 15) + 2);
break;
case 8: /* RRE format, cdfbr instruction */
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
break;
case 9: /* RRE format, cefbr instruction */
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_rege((opcode[3] >> 4) & 15);
break;
case 10: /* RRF format, cfxbr instruction */
if ((opcode[2] & 128) == 128 || (opcode[2] & 96) == 32)
/* mask of { 2,3,8-15 } is invalid */
return SIGILL;
if (opcode[3] & 2)
return SIGILL;
emu_store_regd(opcode[3] & 15);
emu_store_regd((opcode[3] & 15) + 2);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15, opcode[2] >> 4);
break;
case 11: /* RRF format, cfdbr instruction */
if ((opcode[2] & 128) == 128 || (opcode[2] & 96) == 32)
/* mask of { 2,3,8-15 } is invalid */
return SIGILL;
emu_store_regd(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15, opcode[2] >> 4);
break;
case 12: /* RRF format, cfebr instruction */
if ((opcode[2] & 128) == 128 || (opcode[2] & 96) == 32)
/* mask of { 2,3,8-15 } is invalid */
return SIGILL;
emu_store_rege(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15, opcode[2] >> 4);
break;
case 13: /* RRE format, ldxbr & mdxbr instruction */
/* double store but long double load */
if (opcode[3] & 0x20)
return SIGILL;
emu_store_regd((opcode[3] >> 4) & 15);
emu_store_regd(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(((opcode[3] >> 4) & 15) + 2);
break;
case 14: /* RRE format, ldxbr & mdxbr instruction */
/* float store but long double load */
if (opcode[3] & 0x20)
return SIGILL;
emu_store_rege((opcode[3] >> 4) & 15);
emu_store_rege(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
emu_load_regd(((opcode[3] >> 4) & 15) + 2);
break;
case 15: /* RRE format, ldebr & mdebr instruction */
/* float store but double load */
emu_store_rege((opcode[3] >> 4) & 15);
emu_store_rege(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
break;
case 16: /* RRE format, ldxbr instruction */
/* long double store but double load */
if (opcode[3] & 2)
return SIGILL;
emu_store_regd(opcode[3] & 15);
emu_store_regd((opcode[3] & 15) + 2);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_regd((opcode[3] >> 4) & 15);
break;
case 17: /* RRE format, ldxbr instruction */
/* long double store but float load */
if (opcode[3] & 2)
return SIGILL;
emu_store_regd(opcode[3] & 15);
emu_store_regd((opcode[3] & 15) + 2);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_rege((opcode[3] >> 4) & 15);
break;
case 18: /* RRE format, ledbr instruction */
/* double store but float load */
emu_store_regd(opcode[3] & 15);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
emu_load_rege((opcode[3] >> 4) & 15);
break;
case 19: /* RRE format, efpc & sfpc instruction */
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, int))
jump_table[opcode[1]])
(regs, opcode[3] >> 4, opcode[3] & 15);
break;
default: /* invalid operation */
return SIGILL;
}
if (_fex != 0) {
current->thread.fp_regs.fpc |= _fex;
if (current->thread.fp_regs.fpc & (_fex << 8))
return SIGFPE;
}
return 0;
}
static void* calc_addr(struct pt_regs *regs, int rx, int rb, int disp)
{
addr_t addr;
rx &= 15;
rb &= 15;
addr = disp & 0xfff;
addr += (rx != 0) ? regs->gprs[rx] : 0; /* + index */
addr += (rb != 0) ? regs->gprs[rb] : 0; /* + base */
return (void*) addr;
}
int math_emu_ed(__u8 *opcode, struct pt_regs * regs) {
int _fex = 0;
static const __u8 format_table[256] = {
[0x04] = 0x06,[0x05] = 0x05,[0x06] = 0x07,[0x07] = 0x05,
[0x08] = 0x02,[0x09] = 0x02,[0x0a] = 0x02,[0x0b] = 0x02,
[0x0c] = 0x06,[0x0d] = 0x02,[0x0e] = 0x04,[0x0f] = 0x04,
[0x10] = 0x08,[0x11] = 0x09,[0x12] = 0x0a,[0x14] = 0x02,
[0x15] = 0x01,[0x17] = 0x02,[0x18] = 0x01,[0x19] = 0x01,
[0x1a] = 0x01,[0x1b] = 0x01,[0x1c] = 0x01,[0x1d] = 0x01,
[0x1e] = 0x03,[0x1f] = 0x03,
};
static const void *jump_table[]= {
[0x04] = emu_ldeb,[0x05] = emu_lxdb,[0x06] = emu_lxeb,
[0x07] = emu_mxdb,[0x08] = emu_keb, [0x09] = emu_ceb,
[0x0a] = emu_aeb, [0x0b] = emu_seb, [0x0c] = emu_mdeb,
[0x0d] = emu_deb, [0x0e] = emu_maeb,[0x0f] = emu_mseb,
[0x10] = emu_tceb,[0x11] = emu_tcdb,[0x12] = emu_tcxb,
[0x14] = emu_sqeb,[0x15] = emu_sqdb,[0x17] = emu_meeb,
[0x18] = emu_kdb, [0x19] = emu_cdb, [0x1a] = emu_adb,
[0x1b] = emu_sdb, [0x1c] = emu_mdb, [0x1d] = emu_ddb,
[0x1e] = emu_madb,[0x1f] = emu_msdb
};
switch (format_table[opcode[5]]) {
case 1: /* RXE format, double constant */ {
__u64 *dxb, temp;
__u32 opc;
emu_store_regd((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u64 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_copy_from_user(&temp, dxb, 8);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, double *))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (double *) &temp);
emu_load_regd((opcode[1] >> 4) & 15);
break;
}
case 2: /* RXE format, float constant */ {
__u32 *dxb, temp;
__u32 opc;
emu_store_rege((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u32 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_get_user(temp, dxb);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, float *))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (float *) &temp);
emu_load_rege((opcode[1] >> 4) & 15);
break;
}
case 3: /* RXF format, double constant */ {
__u64 *dxb, temp;
__u32 opc;
emu_store_regd((opcode[1] >> 4) & 15);
emu_store_regd((opcode[4] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u64 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_copy_from_user(&temp, dxb, 8);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, double *, int))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (double *) &temp, opcode[4] >> 4);
emu_load_regd((opcode[1] >> 4) & 15);
break;
}
case 4: /* RXF format, float constant */ {
__u32 *dxb, temp;
__u32 opc;
emu_store_rege((opcode[1] >> 4) & 15);
emu_store_rege((opcode[4] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u32 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_get_user(temp, dxb);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, float *, int))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (float *) &temp, opcode[4] >> 4);
emu_load_rege((opcode[4] >> 4) & 15);
break;
}
case 5: /* RXE format, double constant */
/* store double and load long double */
{
__u64 *dxb, temp;
__u32 opc;
if ((opcode[1] >> 4) & 0x20)
return SIGILL;
emu_store_regd((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u64 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_copy_from_user(&temp, dxb, 8);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, double *))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (double *) &temp);
emu_load_regd((opcode[1] >> 4) & 15);
emu_load_regd(((opcode[1] >> 4) & 15) + 2);
break;
}
case 6: /* RXE format, float constant */
/* store float and load double */
{
__u32 *dxb, temp;
__u32 opc;
emu_store_rege((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u32 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_get_user(temp, dxb);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, float *))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (float *) &temp);
emu_load_regd((opcode[1] >> 4) & 15);
break;
}
case 7: /* RXE format, float constant */
/* store float and load long double */
{
__u32 *dxb, temp;
__u32 opc;
if ((opcode[1] >> 4) & 0x20)
return SIGILL;
emu_store_rege((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u32 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_get_user(temp, dxb);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, float *))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, (float *) &temp);
emu_load_regd((opcode[1] >> 4) & 15);
emu_load_regd(((opcode[1] >> 4) & 15) + 2);
break;
}
case 8: /* RXE format, RX address used as int value */ {
__u64 dxb;
__u32 opc;
emu_store_rege((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u64) calc_addr(regs, opc >> 16, opc >> 12, opc);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, long))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, dxb);
break;
}
case 9: /* RXE format, RX address used as int value */ {
__u64 dxb;
__u32 opc;
emu_store_regd((opcode[1] >> 4) & 15);
opc = *((__u32 *) opcode);
dxb = (__u64) calc_addr(regs, opc >> 16, opc >> 12, opc);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, long))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, dxb);
break;
}
case 10: /* RXE format, RX address used as int value */ {
__u64 dxb;
__u32 opc;
if ((opcode[1] >> 4) & 2)
return SIGILL;
emu_store_regd((opcode[1] >> 4) & 15);
emu_store_regd(((opcode[1] >> 4) & 15) + 2);
opc = *((__u32 *) opcode);
dxb = (__u64) calc_addr(regs, opc >> 16, opc >> 12, opc);
/* call the emulation function */
_fex = ((int (*)(struct pt_regs *, int, long))
jump_table[opcode[5]])
(regs, opcode[1] >> 4, dxb);
break;
}
default: /* invalid operation */
return SIGILL;
}
if (_fex != 0) {
current->thread.fp_regs.fpc |= _fex;
if (current->thread.fp_regs.fpc & (_fex << 8))
return SIGFPE;
}
return 0;
}
/*
* Emulate LDR Rx,Ry with Rx or Ry not in {0, 2, 4, 6}
*/
int math_emu_ldr(__u8 *opcode) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
__u16 opc = *((__u16 *) opcode);
if ((opc & 0x90) == 0) { /* test if rx in {0,2,4,6} */
/* we got an exception therefore ry can't be in {0,2,4,6} */
asm volatile( /* load rx from fp_regs.fprs[ry] */
" bras 1,0f\n"
" ld 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" (opc & 0xf0), "a" (&fp_regs->fprs[opc & 0xf].d)
: "1");
} else if ((opc & 0x9) == 0) { /* test if ry in {0,2,4,6} */
asm volatile ( /* store ry to fp_regs.fprs[rx] */
" bras 1,0f\n"
" std 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" ((opc & 0xf) << 4),
"a" (&fp_regs->fprs[(opc & 0xf0)>>4].d)
: "1");
} else /* move fp_regs.fprs[ry] to fp_regs.fprs[rx] */
fp_regs->fprs[(opc & 0xf0) >> 4] = fp_regs->fprs[opc & 0xf];
return 0;
}
/*
* Emulate LER Rx,Ry with Rx or Ry not in {0, 2, 4, 6}
*/
int math_emu_ler(__u8 *opcode) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
__u16 opc = *((__u16 *) opcode);
if ((opc & 0x90) == 0) { /* test if rx in {0,2,4,6} */
/* we got an exception therefore ry can't be in {0,2,4,6} */
asm volatile( /* load rx from fp_regs.fprs[ry] */
" bras 1,0f\n"
" le 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" (opc & 0xf0), "a" (&fp_regs->fprs[opc & 0xf].f)
: "1");
} else if ((opc & 0x9) == 0) { /* test if ry in {0,2,4,6} */
asm volatile( /* store ry to fp_regs.fprs[rx] */
" bras 1,0f\n"
" ste 0,0(%1)\n"
"0: ex %0,0(1)"
: /* no output */
: "a" ((opc & 0xf) << 4),
"a" (&fp_regs->fprs[(opc & 0xf0) >> 4].f)
: "1");
} else /* move fp_regs.fprs[ry] to fp_regs.fprs[rx] */
fp_regs->fprs[(opc & 0xf0) >> 4] = fp_regs->fprs[opc & 0xf];
return 0;
}
/*
* Emulate LD R,D(X,B) with R not in {0, 2, 4, 6}
*/
int math_emu_ld(__u8 *opcode, struct pt_regs * regs) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
__u32 opc = *((__u32 *) opcode);
__u64 *dxb;
dxb = (__u64 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_copy_from_user(&fp_regs->fprs[(opc >> 20) & 0xf].d, dxb, 8);
return 0;
}
/*
* Emulate LE R,D(X,B) with R not in {0, 2, 4, 6}
*/
int math_emu_le(__u8 *opcode, struct pt_regs * regs) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
__u32 opc = *((__u32 *) opcode);
__u32 *mem, *dxb;
dxb = (__u32 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mem = (__u32 *) (&fp_regs->fprs[(opc >> 20) & 0xf].f);
mathemu_get_user(mem[0], dxb);
return 0;
}
/*
* Emulate STD R,D(X,B) with R not in {0, 2, 4, 6}
*/
int math_emu_std(__u8 *opcode, struct pt_regs * regs) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
__u32 opc = *((__u32 *) opcode);
__u64 *dxb;
dxb = (__u64 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mathemu_copy_to_user(dxb, &fp_regs->fprs[(opc >> 20) & 0xf].d, 8);
return 0;
}
/*
* Emulate STE R,D(X,B) with R not in {0, 2, 4, 6}
*/
int math_emu_ste(__u8 *opcode, struct pt_regs * regs) {
s390_fp_regs *fp_regs = &current->thread.fp_regs;
__u32 opc = *((__u32 *) opcode);
__u32 *mem, *dxb;
dxb = (__u32 *) calc_addr(regs, opc >> 16, opc >> 12, opc);
mem = (__u32 *) (&fp_regs->fprs[(opc >> 20) & 0xf].f);
mathemu_put_user(mem[0], dxb);
return 0;
}
/*
* Emulate LFPC D(B)
*/
int math_emu_lfpc(__u8 *opcode, struct pt_regs *regs) {
__u32 opc = *((__u32 *) opcode);
__u32 *dxb, temp;
dxb= (__u32 *) calc_addr(regs, 0, opc>>12, opc);
mathemu_get_user(temp, dxb);
if ((temp & ~FPC_VALID_MASK) != 0)
return SIGILL;
current->thread.fp_regs.fpc = temp;
return 0;
}
/*
* Emulate STFPC D(B)
*/
int math_emu_stfpc(__u8 *opcode, struct pt_regs *regs) {
__u32 opc = *((__u32 *) opcode);
__u32 *dxb;
dxb= (__u32 *) calc_addr(regs, 0, opc>>12, opc);
mathemu_put_user(current->thread.fp_regs.fpc, dxb);
return 0;
}
/*
* Emulate SRNM D(B)
*/
int math_emu_srnm(__u8 *opcode, struct pt_regs *regs) {
__u32 opc = *((__u32 *) opcode);
__u32 temp;
temp = calc_addr(regs, 0, opc>>12, opc);
current->thread.fp_regs.fpc &= ~3;
current->thread.fp_regs.fpc |= (temp & 3);
return 0;
}
/* broken compiler ... */
long long
__negdi2 (long long u)
{
union lll {
long long ll;
long s[2];
};
union lll w,uu;
uu.ll = u;
w.s[1] = -uu.s[1];
w.s[0] = -uu.s[0] - ((int) w.s[1] != 0);
return w.ll;
}
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