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linux-next/arch/s390/math-emu/math.c
Heiko Carstens a53c8fab3f s390/comments: unify copyright messages and remove file names 
Remove the file name from the comment at top of many files. In most
cases the file name was wrong anyway, so it's rather pointless.

Also unify the IBM copyright statement. We did have a lot of sightly
different statements and wanted to change them one after another
whenever a file gets touched. However that never happened. Instead
people start to take the old/"wrong" statements to use as a template
for new files.
So unify all of them in one go.

Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
2012-07-20 11:15:04 +02:00

2254 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>
/*
* 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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