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|
/*
* CDDL HEADER START
*
* The contents of this file are subject to the terms of the
* Common Development and Distribution License (the "License").
* You may not use this file except in compliance with the License.
*
* You can obtain a copy of the license at usr/src/OPENSOLARIS.LICENSE
* or http://www.opensolaris.org/os/licensing.
* See the License for the specific language governing permissions
* and limitations under the License.
*
* When distributing Covered Code, include this CDDL HEADER in each
* file and include the License file at usr/src/OPENSOLARIS.LICENSE.
* If applicable, add the following below this CDDL HEADER, with the
* fields enclosed by brackets "[]" replaced with your own identifying
* information: Portions Copyright [yyyy] [name of copyright owner]
*
* CDDL HEADER END
*/
/*
* Copyright 2011 Nexenta Systems, Inc. All rights reserved.
*/
/*
* Copyright 2006 Sun Microsystems, Inc. All rights reserved.
* Use is subject to license terms.
*/
#if defined(__sparc)
#include <stdio.h>
#include <unistd.h>
#include <string.h>
#include <signal.h>
#include <siginfo.h>
#include <thread.h>
#include <ucontext.h>
#include <math.h>
#if defined(__SUNPRO_C)
#include <sunmath.h>
#endif
#include <fenv.h>
#include "fenv_inlines.h"
#include "libm_inlines.h"
#ifdef __sparcv9
#define FPreg(X) &uap->uc_mcontext.fpregs.fpu_fr.fpu_regs[X]
#define FPREG(X) &uap->uc_mcontext.fpregs.fpu_fr.fpu_dregs[(X>>1)| \
((X&1)<<4)]
#else
#include <sys/procfs.h>
#define FPxreg(X) &((prxregset_t*)uap->uc_mcontext.xrs.xrs_ptr)->pr_un.pr_v8p.pr_xfr.pr_regs[X]
#define FPreg(X) &uap->uc_mcontext.fpregs.fpu_fr.fpu_regs[X]
#define FPREG(X) ((X & 1)? FPxreg(X - 1) : FPreg(X))
#endif /* __sparcv9 */
#include "fex_handler.h"
/* avoid dependence on libsunmath */
static enum fp_class_type
my_fp_classl(long double *a)
{
int msw = *(int*)a & ~0x80000000;
if (msw >= 0x7fff0000) {
if (((msw & 0xffff) | *(1+(int*)a) | *(2+(int*)a) | *(3+(int*)a)) == 0)
return fp_infinity;
else if (msw & 0x8000)
return fp_quiet;
else
return fp_signaling;
} else if (msw < 0x10000) {
if ((msw | *(1+(int*)a) | *(2+(int*)a) | *(3+(int*)a)) == 0)
return fp_zero;
else
return fp_subnormal;
} else
return fp_normal;
}
/*
* Determine which type of invalid operation exception occurred
*/
enum fex_exception
__fex_get_invalid_type(siginfo_t *sip, ucontext_t *uap)
{
unsigned instr, opf, rs1, rs2;
enum fp_class_type t1, t2;
/* parse the instruction which caused the exception */
instr = uap->uc_mcontext.fpregs.fpu_q->FQu.fpq.fpq_instr;
opf = (instr >> 5) & 0x1ff;
rs1 = (instr >> 14) & 0x1f;
rs2 = instr & 0x1f;
/* determine the classes of the operands */
switch (opf & 3) {
case 1: /* single */
t1 = fp_classf(*(float*)FPreg(rs1));
t2 = fp_classf(*(float*)FPreg(rs2));
break;
case 2: /* double */
t1 = fp_class(*(double*)FPREG(rs1));
t2 = fp_class(*(double*)FPREG(rs2));
break;
case 3: /* quad */
t1 = my_fp_classl((long double*)FPREG(rs1));
t2 = my_fp_classl((long double*)FPREG(rs2));
break;
default: /* integer operands never cause an invalid operation */
return (enum fex_exception) -1;
}
/* if rs2 is snan, return immediately */
if (t2 == fp_signaling)
return fex_inv_snan;
/* determine the type of operation */
switch ((instr >> 19) & 0x183f) {
case 0x1034: /* add, subtract, multiply, divide, square root, convert */
switch (opf & 0x1fc) {
case 0x40:
case 0x44: /* add or subtract */
if (t1 == fp_signaling)
return fex_inv_snan;
else
return fex_inv_isi;
case 0x48:
case 0x68:
case 0x6c: /* multiply */
if (t1 == fp_signaling)
return fex_inv_snan;
else
return fex_inv_zmi;
case 0x4c: /* divide */
if (t1 == fp_signaling)
return fex_inv_snan;
else if (t1 == fp_zero)
return fex_inv_zdz;
else
return fex_inv_idi;
case 0x28: /* square root */
return fex_inv_sqrt;
case 0x80:
case 0xd0: /* convert to integer */
return fex_inv_int;
}
break;
case 0x1035: /* compare */
if (t1 == fp_signaling)
return fex_inv_snan;
else
return fex_inv_cmp;
}
return (enum fex_exception) -1;
}
#ifdef __sparcv9
extern void _Qp_sqrt(long double *, const long double *);
#else
extern long double _Q_sqrt(long double);
#endif
/*
* Get the operands, generate the default untrapped result with
* exceptions, and set a code indicating the type of operation
*/
void
__fex_get_op(siginfo_t *sip, ucontext_t *uap, fex_info_t *info)
{
unsigned long fsr;
unsigned instr, opf, rs1, rs2;
volatile int c;
/* parse the instruction which caused the exception */
instr = uap->uc_mcontext.fpregs.fpu_q->FQu.fpq.fpq_instr;
opf = (instr >> 5) & 0x1ff;
rs1 = (instr >> 14) & 0x1f;
rs2 = instr & 0x1f;
/* get the operands */
switch (opf & 3) {
case 0: /* integer */
info->op1.type = fex_nodata;
if (opf & 0x40) {
info->op2.type = fex_int;
info->op2.val.i = *(int*)FPreg(rs2);
}
else {
info->op2.type = fex_llong;
info->op2.val.l = *(long long*)FPREG(rs2);
}
break;
case 1: /* single */
info->op1.type = info->op2.type = fex_float;
info->op1.val.f = *(float*)FPreg(rs1);
info->op2.val.f = *(float*)FPreg(rs2);
break;
case 2: /* double */
info->op1.type = info->op2.type = fex_double;
info->op1.val.d = *(double*)FPREG(rs1);
info->op2.val.d = *(double*)FPREG(rs2);
break;
case 3: /* quad */
info->op1.type = info->op2.type = fex_ldouble;
info->op1.val.q = *(long double*)FPREG(rs1);
info->op2.val.q = *(long double*)FPREG(rs2);
break;
}
/* initialize res to the default untrapped result and ex to the
corresponding flags (assume trapping is disabled and flags
are clear) */
info->op = fex_other;
info->res.type = fex_nodata;
switch ((instr >> 19) & 0x183f) {
case 0x1035: /* compare */
info->op = fex_cmp;
switch (opf) {
case 0x51: /* compare single */
c = (info->op1.val.f == info->op2.val.f);
break;
case 0x52: /* compare double */
c = (info->op1.val.d == info->op2.val.d);
break;
case 0x53: /* compare quad */
c = (info->op1.val.q == info->op2.val.q);
break;
case 0x55: /* compare single with exception */
c = (info->op1.val.f < info->op2.val.f);
break;
case 0x56: /* compare double with exception */
c = (info->op1.val.d < info->op2.val.d);
break;
case 0x57: /* compare quad with exception */
c = (info->op1.val.q < info->op2.val.q);
break;
}
break;
case 0x1034: /* add, subtract, multiply, divide, square root, convert */
switch (opf) {
case 0x41: /* add single */
info->op = fex_add;
info->res.type = fex_float;
info->res.val.f = info->op1.val.f + info->op2.val.f;
break;
case 0x42: /* add double */
info->op = fex_add;
info->res.type = fex_double;
info->res.val.d = info->op1.val.d + info->op2.val.d;
break;
case 0x43: /* add quad */
info->op = fex_add;
info->res.type = fex_ldouble;
info->res.val.q = info->op1.val.q + info->op2.val.q;
break;
case 0x45: /* subtract single */
info->op = fex_sub;
info->res.type = fex_float;
info->res.val.f = info->op1.val.f - info->op2.val.f;
break;
case 0x46: /* subtract double */
info->op = fex_sub;
info->res.type = fex_double;
info->res.val.d = info->op1.val.d - info->op2.val.d;
break;
case 0x47: /* subtract quad */
info->op = fex_sub;
info->res.type = fex_ldouble;
info->res.val.q = info->op1.val.q - info->op2.val.q;
break;
case 0x49: /* multiply single */
info->op = fex_mul;
info->res.type = fex_float;
info->res.val.f = info->op1.val.f * info->op2.val.f;
break;
case 0x4a: /* multiply double */
info->op = fex_mul;
info->res.type = fex_double;
info->res.val.d = info->op1.val.d * info->op2.val.d;
break;
case 0x4b: /* multiply quad */
info->op = fex_mul;
info->res.type = fex_ldouble;
info->res.val.q = info->op1.val.q * info->op2.val.q;
break;
case 0x69: /* fsmuld */
info->op = fex_mul;
info->res.type = fex_double;
info->res.val.d = (double)info->op1.val.f * (double)info->op2.val.f;
break;
case 0x6e: /* fdmulq */
info->op = fex_mul;
info->res.type = fex_ldouble;
info->res.val.q = (long double)info->op1.val.d *
(long double)info->op2.val.d;
break;
case 0x4d: /* divide single */
info->op = fex_div;
info->res.type = fex_float;
info->res.val.f = info->op1.val.f / info->op2.val.f;
break;
case 0x4e: /* divide double */
info->op = fex_div;
info->res.type = fex_double;
info->res.val.d = info->op1.val.d / info->op2.val.d;
break;
case 0x4f: /* divide quad */
info->op = fex_div;
info->res.type = fex_ldouble;
info->res.val.q = info->op1.val.q / info->op2.val.q;
break;
case 0x29: /* square root single */
info->op = fex_sqrt;
info->op1 = info->op2;
info->op2.type = fex_nodata;
info->res.type = fex_float;
info->res.val.f = sqrtf(info->op1.val.f);
break;
case 0x2a: /* square root double */
info->op = fex_sqrt;
info->op1 = info->op2;
info->op2.type = fex_nodata;
info->res.type = fex_double;
info->res.val.d = sqrt(info->op1.val.d);
break;
case 0x2b: /* square root quad */
info->op = fex_sqrt;
info->op1 = info->op2;
info->op2.type = fex_nodata;
info->res.type = fex_ldouble;
#ifdef __sparcv9
_Qp_sqrt(&info->res.val.q, &info->op1.val.q);
#else
info->res.val.q = _Q_sqrt(info->op1.val.q);
#endif
break;
default: /* conversions */
info->op = fex_cnvt;
info->op1 = info->op2;
info->op2.type = fex_nodata;
switch (opf) {
case 0xd1: /* convert single to int */
info->res.type = fex_int;
info->res.val.i = (int) info->op1.val.f;
break;
case 0xd2: /* convert double to int */
info->res.type = fex_int;
info->res.val.i = (int) info->op1.val.d;
break;
case 0xd3: /* convert quad to int */
info->res.type = fex_int;
info->res.val.i = (int) info->op1.val.q;
break;
case 0x81: /* convert single to long long */
info->res.type = fex_llong;
info->res.val.l = (long long) info->op1.val.f;
break;
case 0x82: /* convert double to long long */
info->res.type = fex_llong;
info->res.val.l = (long long) info->op1.val.d;
break;
case 0x83: /* convert quad to long long */
info->res.type = fex_llong;
info->res.val.l = (long long) info->op1.val.q;
break;
case 0xc4: /* convert int to single */
info->res.type = fex_float;
info->res.val.f = (float) info->op1.val.i;
break;
case 0x84: /* convert long long to single */
info->res.type = fex_float;
info->res.val.f = (float) info->op1.val.l;
break;
case 0x88: /* convert long long to double */
info->res.type = fex_double;
info->res.val.d = (double) info->op1.val.l;
break;
case 0xc6: /* convert double to single */
info->res.type = fex_float;
info->res.val.f = (float) info->op1.val.d;
break;
case 0xc7: /* convert quad to single */
info->res.type = fex_float;
info->res.val.f = (float) info->op1.val.q;
break;
case 0xc9: /* convert single to double */
info->res.type = fex_double;
info->res.val.d = (double) info->op1.val.f;
break;
case 0xcb: /* convert quad to double */
info->res.type = fex_double;
info->res.val.d = (double) info->op1.val.q;
break;
case 0xcd: /* convert single to quad */
info->res.type = fex_ldouble;
info->res.val.q = (long double) info->op1.val.f;
break;
case 0xce: /* convert double to quad */
info->res.type = fex_ldouble;
info->res.val.q = (long double) info->op1.val.d;
break;
}
}
break;
}
__fenv_getfsr(&fsr);
info->flags = (int)__fenv_get_ex(fsr);
__fenv_set_ex(fsr, 0);
__fenv_setfsr(&fsr);
}
/*
* Store the specified result; if no result is given but the exception
* is underflow or overflow, supply the default trapped result
*/
void
__fex_st_result(siginfo_t *sip, ucontext_t *uap, fex_info_t *info)
{
unsigned instr, opf, rs1, rs2, rd;
long double qscl;
double dscl;
float fscl;
/* parse the instruction which caused the exception */
instr = uap->uc_mcontext.fpregs.fpu_q->FQu.fpq.fpq_instr;
opf = (instr >> 5) & 0x1ff;
rs1 = (instr >> 14) & 0x1f;
rs2 = instr & 0x1f;
rd = (instr >> 25) & 0x1f;
/* if the instruction is a compare, just set fcc to unordered */
if (((instr >> 19) & 0x183f) == 0x1035) {
if (rd == 0)
uap->uc_mcontext.fpregs.fpu_fsr |= 0xc00;
else {
#ifdef __sparcv9
uap->uc_mcontext.fpregs.fpu_fsr |= (3l << ((rd << 1) + 30));
#else
((prxregset_t*)uap->uc_mcontext.xrs.xrs_ptr)->pr_un.pr_v8p.pr_xfsr |= (3 << ((rd - 1) << 1));
#endif
}
return;
}
/* if there is no result available, try to generate the untrapped
default */
if (info->res.type == fex_nodata) {
/* set scale factors for exponent wrapping */
switch (sip->si_code) {
case FPE_FLTOVF:
fscl = 1.262177448e-29f; /* 2^-96 */
dscl = 6.441148769597133308e-232; /* 2^-768 */
qscl = 8.778357852076208839765066529179033145e-3700l;/* 2^-12288 */
break;
case FPE_FLTUND:
fscl = 7.922816251e+28f; /* 2^96 */
dscl = 1.552518092300708935e+231; /* 2^768 */
qscl = 1.139165225263043370845938579315932009e+3699l;/* 2^12288 */
break;
default:
/* user may have blown away the default result by mistake,
so try to regenerate it */
(void) __fex_get_op(sip, uap, info);
if (info->res.type != fex_nodata)
goto stuff;
/* couldn't do it */
return;
}
/* get the operands */
switch (opf & 3) {
case 1: /* single */
info->op1.val.f = *(float*)FPreg(rs1);
info->op2.val.f = *(float*)FPreg(rs2);
break;
case 2: /* double */
info->op1.val.d = *(double*)FPREG(rs1);
info->op2.val.d = *(double*)FPREG(rs2);
break;
case 3: /* quad */
info->op1.val.q = *(long double*)FPREG(rs1);
info->op2.val.q = *(long double*)FPREG(rs2);
break;
}
/* generate the wrapped result */
switch (opf) {
case 0x41: /* add single */
info->res.type = fex_float;
info->res.val.f = fscl * (fscl * info->op1.val.f +
fscl * info->op2.val.f);
break;
case 0x42: /* add double */
info->res.type = fex_double;
info->res.val.d = dscl * (dscl * info->op1.val.d +
dscl * info->op2.val.d);
break;
case 0x43: /* add quad */
info->res.type = fex_ldouble;
info->res.val.q = qscl * (qscl * info->op1.val.q +
qscl * info->op2.val.q);
break;
case 0x45: /* subtract single */
info->res.type = fex_float;
info->res.val.f = fscl * (fscl * info->op1.val.f -
fscl * info->op2.val.f);
break;
case 0x46: /* subtract double */
info->res.type = fex_double;
info->res.val.d = dscl * (dscl * info->op1.val.d -
dscl * info->op2.val.d);
break;
case 0x47: /* subtract quad */
info->res.type = fex_ldouble;
info->res.val.q = qscl * (qscl * info->op1.val.q -
qscl * info->op2.val.q);
break;
case 0x49: /* multiply single */
info->res.type = fex_float;
info->res.val.f = (fscl * info->op1.val.f) *
(fscl * info->op2.val.f);
break;
case 0x4a: /* multiply double */
info->res.type = fex_double;
info->res.val.d = (dscl * info->op1.val.d) *
(dscl * info->op2.val.d);
break;
case 0x4b: /* multiply quad */
info->res.type = fex_ldouble;
info->res.val.q = (qscl * info->op1.val.q) *
(qscl * info->op2.val.q);
break;
case 0x4d: /* divide single */
info->res.type = fex_float;
info->res.val.f = (fscl * info->op1.val.f) /
(info->op2.val.f / fscl);
break;
case 0x4e: /* divide double */
info->res.type = fex_double;
info->res.val.d = (dscl * info->op1.val.d) /
(info->op2.val.d / dscl);
break;
case 0x4f: /* divide quad */
info->res.type = fex_ldouble;
info->res.val.q = (qscl * info->op1.val.q) /
(info->op2.val.q / qscl);
break;
case 0xc6: /* convert double to single */
info->res.type = fex_float;
info->res.val.f = (float) (fscl * (fscl * info->op1.val.d));
break;
case 0xc7: /* convert quad to single */
info->res.type = fex_float;
info->res.val.f = (float) (fscl * (fscl * info->op1.val.q));
break;
case 0xcb: /* convert quad to double */
info->res.type = fex_double;
info->res.val.d = (double) (dscl * (dscl * info->op1.val.q));
break;
}
if (info->res.type == fex_nodata)
/* couldn't do it */
return;
}
stuff:
/* stick the result in the destination */
if (opf & 0x80) { /* conversion */
if (opf & 0x10) { /* result is an int */
switch (info->res.type) {
case fex_llong:
info->res.val.i = (int) info->res.val.l;
break;
case fex_float:
info->res.val.i = (int) info->res.val.f;
break;
case fex_double:
info->res.val.i = (int) info->res.val.d;
break;
case fex_ldouble:
info->res.val.i = (int) info->res.val.q;
break;
default:
break;
}
*(int*)FPreg(rd) = info->res.val.i;
return;
}
switch (opf & 0xc) {
case 0: /* result is long long */
switch (info->res.type) {
case fex_int:
info->res.val.l = (long long) info->res.val.i;
break;
case fex_float:
info->res.val.l = (long long) info->res.val.f;
break;
case fex_double:
info->res.val.l = (long long) info->res.val.d;
break;
case fex_ldouble:
info->res.val.l = (long long) info->res.val.q;
break;
default:
break;
}
*(long long*)FPREG(rd) = info->res.val.l;
break;
case 0x4: /* result is float */
switch (info->res.type) {
case fex_int:
info->res.val.f = (float) info->res.val.i;
break;
case fex_llong:
info->res.val.f = (float) info->res.val.l;
break;
case fex_double:
info->res.val.f = (float) info->res.val.d;
break;
case fex_ldouble:
info->res.val.f = (float) info->res.val.q;
break;
default:
break;
}
*(float*)FPreg(rd) = info->res.val.f;
break;
case 0x8: /* result is double */
switch (info->res.type) {
case fex_int:
info->res.val.d = (double) info->res.val.i;
break;
case fex_llong:
info->res.val.d = (double) info->res.val.l;
break;
case fex_float:
info->res.val.d = (double) info->res.val.f;
break;
case fex_ldouble:
info->res.val.d = (double) info->res.val.q;
break;
default:
break;
}
*(double*)FPREG(rd) = info->res.val.d;
break;
case 0xc: /* result is long double */
switch (info->res.type) {
case fex_int:
info->res.val.q = (long double) info->res.val.i;
break;
case fex_llong:
info->res.val.q = (long double) info->res.val.l;
break;
case fex_float:
info->res.val.q = (long double) info->res.val.f;
break;
case fex_double:
info->res.val.q = (long double) info->res.val.d;
break;
default:
break;
}
*(long double*)FPREG(rd) = info->res.val.q;
break;
}
return;
}
if ((opf & 0xf0) == 0x60) { /* fsmuld, fdmulq */
switch (opf & 0xc0) {
case 0x8: /* result is double */
switch (info->res.type) {
case fex_int:
info->res.val.d = (double) info->res.val.i;
break;
case fex_llong:
info->res.val.d = (double) info->res.val.l;
break;
case fex_float:
info->res.val.d = (double) info->res.val.f;
break;
case fex_ldouble:
info->res.val.d = (double) info->res.val.q;
break;
default:
break;
}
*(double*)FPREG(rd) = info->res.val.d;
break;
case 0xc: /* result is long double */
switch (info->res.type) {
case fex_int:
info->res.val.q = (long double) info->res.val.i;
break;
case fex_llong:
info->res.val.q = (long double) info->res.val.l;
break;
case fex_float:
info->res.val.q = (long double) info->res.val.f;
break;
case fex_double:
info->res.val.q = (long double) info->res.val.d;
break;
default:
break;
}
*(long double*)FPREG(rd) = info->res.val.q;
break;
}
return;
}
switch (opf & 3) { /* other arithmetic op */
case 1: /* result is float */
switch (info->res.type) {
case fex_int:
info->res.val.f = (float) info->res.val.i;
break;
case fex_llong:
info->res.val.f = (float) info->res.val.l;
break;
case fex_double:
info->res.val.f = (float) info->res.val.d;
break;
case fex_ldouble:
info->res.val.f = (float) info->res.val.q;
break;
default:
break;
}
*(float*)FPreg(rd) = info->res.val.f;
break;
case 2: /* result is double */
switch (info->res.type) {
case fex_int:
info->res.val.d = (double) info->res.val.i;
break;
case fex_llong:
info->res.val.d = (double) info->res.val.l;
break;
case fex_float:
info->res.val.d = (double) info->res.val.f;
break;
case fex_ldouble:
info->res.val.d = (double) info->res.val.q;
break;
default:
break;
}
*(double*)FPREG(rd) = info->res.val.d;
break;
case 3: /* result is long double */
switch (info->res.type) {
case fex_int:
info->res.val.q = (long double) info->res.val.i;
break;
case fex_llong:
info->res.val.q = (long double) info->res.val.l;
break;
case fex_float:
info->res.val.q = (long double) info->res.val.f;
break;
case fex_double:
info->res.val.q = (long double) info->res.val.d;
break;
default:
break;
}
*(long double*)FPREG(rd) = info->res.val.q;
break;
}
}
#endif /* defined(__sparc) */
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