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host.c
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/*
This file is part of AVRtest -- A simple simulator for the
AVR family of 8-bit microcontrollers designed to test the compiler.
Copyright (C) 2019-2024 Free Software Foundation, Inc.
AVRtest is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 2 of the License, or
(at your option) any later version.
AVRtest is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with AVRtest; see the file COPYING. If not, write to
the Free Software Foundation, 59 Temple Place - Suite 330,
Boston, MA 02111-1307, USA. */
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stdarg.h>
#include <string.h>
#include <math.h>
#include "testavr.h"
#include "options.h"
#include "host.h"
#define IN_AVRTEST
#include "avrtest.h"
#define LEN_LOG_STRING 500
#define LEN_LOG_XFMT 500
ATTR_PRINTF(1,2)
static void log_add_ (const char *fmt, ...)
{
va_list args;
va_start (args, fmt);
log_va (fmt, args);
va_end (args);
}
#define log_add(...) \
do { \
if (is_avrtest_log) \
log_add_ (__VA_ARGS__); \
} while (0)
#define str_append(str, ...) \
sprintf ((str) + strlen (str), __VA_ARGS__)
const layout_t
layout[LOG_X_sentinel] =
{
[LOG_STR_CMD] = { 2, "%s", false, false },
[LOG_PSTR_CMD] = { 2, "%s", false, true },
[LOG_ADDR_CMD] = { 2, " 0x%04x ", false, false },
[LOG_FLOAT_CMD] = { 4, " %.6f ", false, false },
[LOG_D64_CMD] = { 8, " %.6f ", false, false },
[LOG_F7T_CMD] = { 2, " %s ", false, false },
[LOG_U8_CMD] = { 1, " %u ", false, false },
[LOG_U16_CMD] = { 2, " %u ", false, false },
[LOG_U24_CMD] = { 3, " %u ", false, false },
[LOG_U32_CMD] = { 4, " %u ", false, false },
[LOG_U64_CMD] = { 8, " %llu ", false, false },
[LOG_S8_CMD] = { 1, " %d ", true, false },
[LOG_S16_CMD] = { 2, " %d ", true, false },
[LOG_S24_CMD] = { 3, " %d ", true, false },
[LOG_S32_CMD] = { 4, " %d ", true, false },
[LOG_S64_CMD] = { 8, " %lld ", true, false },
[LOG_X8_CMD] = { 1, " 0x%02x ", false, false },
[LOG_X16_CMD] = { 2, " 0x%04x ", false, false },
[LOG_X24_CMD] = { 3, " 0x%06x ", false, false },
[LOG_X32_CMD] = { 4, " 0x%08x ", false, false },
[LOG_X64_CMD] = { 8, " 0x%016llx ", false, false },
[LOG_UNSET_FMT_CMD] = { 0, NULL, false, false },
[LOG_SET_FMT_CMD] = { 2, NULL, false, false },
[LOG_SET_PFMT_CMD] = { 2, NULL, false, true },
[LOG_SET_FMT_ONCE_CMD] = { 2, NULL, false, false },
[LOG_SET_PFMT_ONCE_CMD] = { 2, NULL, false, true },
[LOG_TAG_FMT_CMD] = { 2, NULL, false, false },
[LOG_TAG_PFMT_CMD] = { 2, NULL, false, true },
};
static const layout_t lay_1 = { 1, NULL, false, false }; // 1 byte in RAM.
static const layout_t lay_2 = { 2, NULL, false, false }; // 2 bytes in RAM.
static const layout_t lay_4 = { 4, NULL, false, false }; // 4 bytes in RAM.
/* Copy a string from AVR target to the host, but not more than
LEN_MAX characters. */
char*
read_string (char *p, unsigned addr, bool flash_p, size_t len_max)
{
char c;
size_t n = 0;
if (flash_p
&& arch.flash_pm_offset
&& addr >= arch.flash_pm_offset)
{
// README states that LOG_PSTR etc. can be used to print strings in
// flash. This is ambiguous for devices that see flash in RAM:
// A variable can reside in flash due to __flash or PROGMEM and
// hence in .progmem.data, or it can be located in .rodata.
// If the address appears as a .rodata address, then access RAM
// space (which holds a copy of flash at arch.flash_pm_offset).
flash_p = false;
}
byte *p_avr = cpu_address (addr, flash_p ? AR_FLASH : AR_RAM);
while (++n < len_max && (c = *p_avr++))
if (c != '\r')
*p++ = c;
*p = '\0';
return p;
}
// IEEE-754 single
avr_float_t
decode_avr_float (unsigned val)
{
// float = s bbbbbbbb mmmmmmmmmmmmmmmmmmmmmmm
// 31
// s = sign (1)
// b = biased exponent
// m = mantissa
int one;
const int DIG_MANT = 23;
const int DIG_EXP = 8;
const int EXP_BIAS = 127;
avr_float_t af;
int r = (1 << DIG_EXP) -1;
unsigned mant = af.mant = val & ((1 << DIG_MANT) -1);
val >>= DIG_MANT;
af.exp_biased = val & r;
af.exp = af.exp_biased - EXP_BIAS;
val >>= DIG_EXP;
af.sign_bit = val & 1;
// Denorm?
if (af.exp_biased == 0)
af.fclass = FT_DENORM;
else if (af.exp_biased < r)
af.fclass = FT_NORM;
else if (mant == 0)
af.fclass = FT_INF;
else
af.fclass = FT_NAN;
switch (af.fclass)
{
case FT_NORM:
case FT_DENORM:
one = af.fclass == FT_NORM;
af.mant1 = mant | (one << DIG_MANT);
af.x = ldexp ((double) af.mant1, af.exp + 1 - one - DIG_MANT);
af.x = copysign (af.x, af.sign_bit ? -1.0 : 1.0);
break;
case FT_NAN:
af.x = nan ("");
break;
case FT_INF:
af.x = af.sign_bit ? -HUGE_VAL : HUGE_VAL;
break;
}
return af;
}
// IEEE-754 double
avr_float_t
decode_avr_double (uint64_t val)
{
// double = s bbbbbbbbbbb mmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmmm
// 63
// s = sign (1)
// b = biased exponent
// m = mantissa
int one;
const int DIG_MANT = 52;
const int DIG_EXP = 11;
const int EXP_BIAS = 1023;
avr_float_t af;
int r = (1 << DIG_EXP) -1;
uint64_t mant = af.mant = val & (((uint64_t)1 << DIG_MANT) -1);
val >>= DIG_MANT;
af.exp_biased = val & r;
af.exp = af.exp_biased - EXP_BIAS;
val >>= DIG_EXP;
af.sign_bit = val & 1;
// Denorm?
if (af.exp_biased == 0)
af.fclass = FT_DENORM;
else if (af.exp_biased < r)
af.fclass = FT_NORM;
else if (mant == 0)
af.fclass = FT_INF;
else
af.fclass = FT_NAN;
switch (af.fclass)
{
case FT_NORM:
case FT_DENORM:
one = af.fclass == FT_NORM;
af.mant1 = mant | ((uint64_t)one << DIG_MANT);
af.x = ldexp ((double) af.mant1, af.exp + 1 - one - DIG_MANT);
af.x = copysign (af.x, af.sign_bit ? -1.0 : 1.0);
break;
case FT_NAN:
af.x = nan ("");
break;
case FT_INF:
af.x = af.sign_bit ? -HUGE_VAL : HUGE_VAL;
break;
}
return af;
}
/* Read a value as unsigned from R20. Bytesize (1..4) and signedness are
determined by respective layout[]. If the value is signed a cast to
signed will do the conversion. */
unsigned
get_r20_value (const layout_t *lay)
{
byte *p = cpu_address (20, AR_REG);
unsigned val = 0;
if (lay->signed_p && (0x80 & p[lay->size - 1]))
val = -1U;
for (int n = lay->size; n;)
val = (val << 8) | p[--n];
return val;
}
/* Read a value as unsigned long long from R18. Bytesize (1..8) and
signedness are determined by respective layout[]. If the value is signed
a cast to signed will do the conversion. */
static unsigned long long
get_r18_value (const layout_t *lay)
{
byte *p = cpu_address (18, AR_REG);
unsigned long long val = 0;
if (lay->signed_p && (0x80 & p[lay->size - 1]))
val = -1ull;
for (int n = lay->size; n;)
val = (val << 8) | p[--n];
return val;
}
/* Read a value as unsigned from ADDR. Bytesize (1..4) and signedness
are determined by respective layout[]. If the value is signed, then
a cast to signed will do the conversion. */
static unsigned
get_mem_value (unsigned addr, const layout_t *lay)
{
bool flash_p = lay->in_rom;
if (flash_p
&& arch.flash_pm_offset
&& addr >= arch.flash_pm_offset)
{
// "Flash" is ambiguous for devices that see flash in RAM:
// A variable can reside in flash due to __flash or PRGMEM and
// hence in .progmem.data, or it can be located in .rodata.
// If the address appears as a .rodata address, then access RAM
// (which holds a copy of flash at arch.flash_pm_offset).
flash_p = false;
}
byte *p = cpu_address (addr, flash_p ? AR_FLASH : AR_RAM);
unsigned val = 0;
if (lay->signed_p && (0x80 & p[lay->size - 1]))
val = -1U;
for (int n = lay->size; n;)
val = (val << 8) | p[--n];
return val;
}
static uint8_t
get_mem_byte (unsigned addr)
{
return get_mem_value (addr, & lay_1);
}
typedef struct
{
// Offset set by RESET.
uint64_t n_insns;
uint64_t n_cycles;
// Current value for PRAND mode
uint32_t pvalue;
} ticks_port_t;
void
sys_ticks_cmd (int cfg)
{
static ticks_port_t ticks_port;
// a prime m
const uint32_t prand_m = 0xfffffffb;
// phi (m)
// uint32_t prand_phi_m = m-1; // = 2 * 5 * 19 * 22605091
// a primitive root of (Z/m*Z)^*
const uint32_t prand_root = 0xcafebabe;
cfg &= 0xff;
ticks_port_t *tp = &ticks_port;
if (cfg & TICKS_RESET_ALL_CMD)
{
log_add ("ticks reset:");
if (cfg & TICKS_RESET_CYCLES_CMD)
{
log_add (" cycles");
tp->n_cycles = program.n_cycles;
}
if (cfg & TICKS_RESET_INSNS_CMD)
{
log_add (" insns");
tp->n_insns = program.n_insns;
}
if (cfg & TICKS_RESET_PRAND_CMD)
{
log_add (" prand");
tp->pvalue = 0;
}
return;
}
const char *what = "???";
uint32_t value = 0;
switch (cfg)
{
case TICKS_GET_CYCLES_CMD:
what = "cycles";
value = (uint32_t) (program.n_cycles - tp->n_cycles);
break;
case TICKS_GET_INSNS_CMD:
what = "insn";
value = (uint32_t) (program.n_insns - tp->n_insns);
break;
case TICKS_GET_PRAND_CMD:
what = "prand";
value = tp->pvalue ? tp->pvalue : 1;
value = ((uint64_t) value * prand_root) % prand_m;
tp->pvalue = value;
break;
case TICKS_GET_RAND_CMD:
what = "rand";
value = rand();
value ^= (unsigned) rand() << 11;
value ^= (unsigned) rand() << 22;
break;
}
log_add ("ticks get %s: R22<-(%08x) = %u", what, value, value);
byte *p = cpu_address (22, AR_REG);
*p++ = value;
*p++ = value >> 8;
*p++ = value >> 16;
*p++ = value >> 24;
}
void
sys_log_dump (int what)
{
what &= 0xff;
if (what >= LOG_X_sentinel)
{
log_add ("log: invalid cmd %d\n", what);
return;
}
static int fmt_once = 0;
static char xfmt[LEN_LOG_XFMT];
static char string[LEN_LOG_STRING];
const layout_t *lay = & layout[what];
unsigned val = get_r20_value (lay);
const char *fmt = fmt_once ? xfmt : lay->fmt;
if (fmt_once == 1)
fmt_once = 0;
switch (what)
{
default:
log_add ("log %d-byte value", lay->size);
printf (fmt, val);
break;
case LOG_S64_CMD:
case LOG_U64_CMD:
case LOG_X64_CMD:
log_add ("log %d-byte value", lay->size);
printf (fmt, get_r18_value (lay));
break;
case LOG_SET_FMT_ONCE_CMD:
case LOG_SET_PFMT_ONCE_CMD:
log_add ("log set format");
fmt_once = 1;
read_string (xfmt, val, lay->in_rom, sizeof (xfmt));
break;
case LOG_SET_FMT_CMD:
case LOG_SET_PFMT_CMD:
log_add ("log set format");
fmt_once = -1;
read_string (xfmt, val, lay->in_rom, sizeof (xfmt));
break;
case LOG_UNSET_FMT_CMD:
log_add ("log unset format");
fmt_once = 0;
break;
case LOG_PSTR_CMD:
case LOG_STR_CMD:
log_add ("log string");
read_string (string, val, lay->in_rom, sizeof (string));
printf (fmt, string);
break;
case LOG_FLOAT_CMD:
{
log_add ("log float");
avr_float_t af = decode_avr_float (val);
printf (fmt, af.x);
}
break;
case LOG_D64_CMD:
{
log_add ("log double");
avr_float_t af = decode_avr_double (get_r18_value (lay));
printf (fmt, af.x);
}
break;
case LOG_F7T_CMD:
{
log_add ("log f7_t");
char txt[200];
const int n_mant = 7;
const unsigned addr = val;
const uint8_t flags = get_mem_byte (addr);
const uint8_t m_sign = 1 << 0;
const uint8_t m_zero = 1 << 1;
const uint8_t m_nan = 1 << 2;
const uint8_t m_plusx = 1 << 3;
const uint8_t m_inf = 1 << 7;
const uint8_t m_all = m_sign | m_inf | m_nan | m_zero | m_plusx;
sprintf (txt, "{ flags = ");
str_append (txt, flags <= 1 ? "%d" : "0x%02x", flags);
str_append (txt, " [%c", (flags & m_sign) ? '-' : '+');
if (flags & m_inf) str_append (txt, ",Inf");
if (flags & m_nan) str_append (txt, ",NaN");
if (flags & m_zero) str_append (txt, ",Zero");
if (flags & m_plusx) str_append (txt, ",PlusX");
if (flags & ~m_all) str_append (txt, ",???");
uint64_t mant = 0;
str_append (txt, "], mant = { 0x");
for (int i = n_mant - 1; i >= 0; --i)
{
uint8_t b = get_mem_byte (addr + 1 + i);
str_append (txt, "%02x ", b);
mant = (mant << 8) | b;
}
// mant_bits = 56 = 1 + IEEE_mant_bits + 3
const uint8_t msb = mant >> (8 * n_mant - 1);
// Make mant such that it has 13 + 1 nibbles at the low end.
mant <<= 1;
const uint8_t lsn = mant & 0xf;
// Make mant such that it has 13 nibbles at the low end.
mant >>= 4;
// mant = 0x1.[IEEE_mant_bits] | 3 extra f7 bits
mant &= (UINT64_C(1) << 52) - 1;
str_append (txt, "} = 0x%u.%013" PRIx64 "|%u, expo = %d }",
msb, mant, lsn,
get_mem_value (addr + 1 + n_mant, & layout[LOG_S16_CMD]));
printf (fmt, txt);
}
break;
}
}
#define ARRAY_SIZE(X) (sizeof(X) / sizeof(*X))
static int
is_special_ulp (const avr_float_t *x, const avr_float_t *y)
{
if (x->fclass == FT_NAN && y->fclass == FT_NAN)
return 0;
else if (x->fclass == FT_INF && y->fclass == FT_INF
&& x->sign_bit == y->sign_bit)
return 0;
else if (x->fclass >= FT_INF || y->fclass >= FT_INF)
return 12345;
if (x->mant1 == 0 && y->mant1 == 0)
return 0;
return -1;
}
// Emulating IEEE single functions.
#if __SIZEOF_FLOAT__ != 4
#define NO_FEMUL "host has no 32-bit IEEE single"
#endif
#if !defined NO_FEMUL && __FLT_MANT_DIG__ != 24
#define NO_FEMUL "host IEEE single mantissa != 24 bits"
#endif
#if !defined NO_FEMUL && __FLT_MAX_EXP__ != 128
#define NO_FEMUL "host IEEE single max exponent != 128"
#endif
#if !defined NO_FEMUL \
&& defined __FLOAT_WORD_ORDER__ \
&& defined __ORDER_LITTLE_ENDIAN__ \
&& __FLOAT_WORD_ORDER__ != __ORDER_LITTLE_ENDIAN__
#define NO_FEMUL "host IEEE single is not little endian"
#endif
#define PRIF "%e=%.6a"
#if defined NO_FEMUL
void sys_emul_float (uint8_t fid)
{
log_add ("not supported: %s", NO_FEMUL);
leave (LEAVE_FATAL, "IEEE single emulation failed: %s", NO_FEMUL);
}
#else // float emulation is supported
static float
get_reg_float (int regno)
{
float f;
memcpy (&f, cpu_address (regno, AR_REG), sizeof (float));
return f;
}
static void
set_reg_float (int regno, float f)
{
memcpy (cpu_address (regno, AR_REG), &f, sizeof (float));
}
static avr_float_t
get_reg_avr_float (int regno)
{
uint32_t rval;
memcpy (&rval, cpu_address (regno, AR_REG), sizeof (rval));
return decode_avr_float ((unsigned) rval);
}
/* Error of X in units of ULPs (unit in the last place / unit of least
precision). Y is the reference / assumed correct value. */
static float
get_fulp (const avr_float_t *x, const avr_float_t *y)
{
int iulp = is_special_ulp (x, y);
if (iulp >= 0)
return iulp;
float hx = ldexpf (x->mant1, x->exp);
float hy = ldexpf (y->mant1, y->exp);
float ulp = ldexpf (1, y->exp);
float z = (hx - hy) / ulp;
return fabsf (z);
}
typedef struct
{
float (*fun) (float);
const char *name;
} func1f_t;
typedef struct
{
float (*fun) (float, float);
const char *name;
} func2f_t;
#define _(X) [AVRTEST_##X] = { X ## f, #X },
static const func1f_t func1f[] =
{
_(sin) _(asin) _(sinh) _(asinh)
_(cos) _(acos) _(cosh) _(acosh)
_(tan) _(atan) _(tanh) _(atanh)
_(exp) _(log) _(sqrt) _(cbrt)
_(trunc) _(ceil) _(floor) _(round)
_(log2) _(fabs)
};
#undef _
#define _(X) [AVRTEST_##X - AVRTEST_EMUL_2args] = { X ## f, #X },
static const func2f_t func2f[] =
{
_(pow) _(atan2) _(hypot)
_(fmin) _(fmax) _(fmod)
};
#undef _
static void
emul_float2 (uint8_t fid)
{
float x = get_reg_float (22);
float y = get_reg_float (18);
float z = 0;
const char *name = "???";
switch (fid)
{
case AVRTEST_mul: name = "mul"; z = x * y; break;
case AVRTEST_div: name = "div"; z = x / y; break;
case AVRTEST_add: name = "add"; z = x + y; break;
case AVRTEST_sub: name = "sub"; z = x - y; break;
case AVRTEST_ulp: name = "ulp";
{
avr_float_t ax = get_reg_avr_float (22);
avr_float_t ay = get_reg_avr_float (18);
z = get_fulp (& ax, & ay);
break;
}
default:
fid -= AVRTEST_EMUL_2args;
if (fid >= ARRAY_SIZE (func2f) || ! func2f[fid].fun)
leave (LEAVE_FATAL, "unexpected func2f %u", fid + AVRTEST_EMUL_2args);
z = func2f[fid].fun (x, y);
name = func2f[fid].name;
break;
}
log_add ("emulate %sf(" PRIF ", " PRIF ") = " PRIF "", name, x,x, y,y, z,z);
set_reg_float (22, z);
}
// Emulate IEEE single functions like avrtest_sinf and avrtest_mulf.
void sys_emul_float (uint8_t fid)
{
if (fid >= AVRTEST_EMUL_sentinel)
leave (LEAVE_USAGE, "unknown IEEE single emulate function %u\n", fid);
if (fid >= AVRTEST_EMUL_2args)
{
emul_float2 (fid);
return;
}
if (fid >= ARRAY_SIZE (func1f) || ! func1f[fid].fun)
leave (LEAVE_FATAL, "unexpected func1 %u", fid);
float x = get_reg_float (22);
float z = func1f[fid].fun (x);
log_add ("emulate %sf(" PRIF ") = " PRIF "", func1f[fid].name, x,x, z,z);
set_reg_float (22, z);
}
#endif // NO_FEMUL
// Emulating IEEE double functions.
#if __SIZEOF_DOUBLE__ == 8
typedef double host_double_t;
# define HOST_DOUBLE
# define DOUBLE_MANT_DIG __DBL_MANT_DIG__
# define DOUBLE_MAX_EXP __DBL_MAX_EXP__
# define PRID "%e=%.13a"
#elif __SIZEOF_LONG_DOUBLE__ == 8
typedef long double host_double_t;
# define HOST_LONG_DOUBLE
# define DOUBLE_MANT_DIG __LDBL_MANT_DIG__
# define DOUBLE_MAX_EXP __LDBL_MAX_EXP__
# define PRID "%Le=%.13La"
#else
#define NO_DEMUL "host has no 64-bit IEEE double"
#endif
#if !defined NO_DEMUL && DOUBLE_MANT_DIG != 53
#define NO_DEMUL "host IEEE double mantissa != 53 bits"
#endif
#if !defined NO_DEMUL && DOUBLE_MAX_EXP != 1024
#define NO_DEMUL "host IEEE double max exponent != 1024"
#endif
#if !defined NO_DEMUL \
&& defined __FLOAT_WORD_ORDER__ \
&& defined __ORDER_LITTLE_ENDIAN__ \
&& __FLOAT_WORD_ORDER__ != __ORDER_LITTLE_ENDIAN__
#define NO_DEMUL "host IEEE double is not little endian"
#endif
#if defined NO_DEMUL
void sys_emul_double (uint8_t fid)
{
log_add ("not supported: %s", NO_DEMUL);
leave (LEAVE_FATAL, "IEEE double emulation failed: %s", NO_DEMUL);
}
#else // double emulation is supported
static host_double_t
get_reg_double (int regno)
{
host_double_t d;
memcpy (&d, cpu_address (regno, AR_REG), sizeof (host_double_t));
return d;
}
static void
set_reg_double (int regno, host_double_t d)
{
memcpy (cpu_address (regno, AR_REG), &d, sizeof (host_double_t));
}
static avr_float_t
get_reg_avr_double (int regno)
{
uint64_t rval;
memcpy (&rval, cpu_address (regno, AR_REG), sizeof (rval));
return decode_avr_double (rval);
}
/* Error of X in units of ULPs (unit in the last place / unit of least
precision). Y is the reference / assumed correct value. */
static host_double_t
get_dulp (const avr_float_t *x, const avr_float_t *y)
{
int iulp = is_special_ulp (x, y);
if (iulp >= 0)
return iulp;
host_double_t hx = ldexp (x->mant1, x->exp);
host_double_t hy = ldexp (y->mant1, y->exp);
host_double_t ulp = ldexp (1, y->exp);
host_double_t z = (hx - hy) / ulp;
return fabs (z);
}
typedef struct
{
host_double_t (*fun) (host_double_t);
const char *name;
} func1l_t;
typedef struct
{
host_double_t (*fun) (host_double_t, host_double_t);
const char *name;
} func2l_t;
#if defined HOST_DOUBLE
#define _(X) [AVRTEST_##X] = { X, #X },
#elif defined HOST_LONG_DOUBLE
#define _(X) [AVRTEST_##X] = { X ## l, #X },
#endif
static const func1l_t func1l[] =
{
_(sin) _(asin) _(sinh) _(asinh)
_(cos) _(acos) _(cosh) _(acosh)
_(tan) _(atan) _(tanh) _(atanh)
_(exp) _(log) _(sqrt) _(cbrt)
_(trunc) _(ceil) _(floor) _(round)
_(log2) _(fabs)
};
#undef _
#if defined HOST_DOUBLE
#define _(X) [AVRTEST_##X - AVRTEST_EMUL_2args] = { X, #X },
#elif defined HOST_LONG_DOUBLE
#define _(X) [AVRTEST_##X - AVRTEST_EMUL_2args] = { X ## l, #X },
#endif
static const func2l_t func2l[] =
{
_(pow) _(atan2) _(hypot)
_(fmin) _(fmax) _(fmod)
};
#undef _
static void
emul_double2 (uint8_t fid)
{
host_double_t x = get_reg_double (18);
host_double_t y = get_reg_double (10);
host_double_t z = 0;
const char *name = "???";
switch (fid)
{
case AVRTEST_mul: name = "mul"; z = x * y; break;
case AVRTEST_div: name = "div"; z = x / y; break;
case AVRTEST_add: name = "add"; z = x + y; break;
case AVRTEST_sub: name = "sub"; z = x - y; break;
case AVRTEST_ulp: name = "ulp";
{
avr_float_t ax = get_reg_avr_double (18);
avr_float_t ay = get_reg_avr_double (10);
z = get_dulp (& ax, & ay);
break;
}
default:
fid -= AVRTEST_EMUL_2args;
if (fid >= ARRAY_SIZE (func2l) || ! func2l[fid].fun)
leave (LEAVE_FATAL, "unexpected func2l %u", fid + AVRTEST_EMUL_2args);
z = func2l[fid].fun (x, y);
name = func2l[fid].name;
break;
}
log_add ("emulate %sl(" PRID ", " PRID ") = " PRID, name, x,x, y,y, z,z);
set_reg_double (18, z);
}
// Emulate IEEE double functions like avrtest_sin and avrtest_mul.
void sys_emul_double (uint8_t fid)
{
if (fid >= AVRTEST_EMUL_sentinel)
leave (LEAVE_USAGE, "unknown IEEE double emulate function %u\n", fid);
if (fid >= AVRTEST_EMUL_2args)
{
emul_double2 (fid);
return;
}
if (fid >= ARRAY_SIZE (func1l) || ! func1l[fid].fun)
leave (LEAVE_FATAL, "unexpected func1l %u", fid);
host_double_t x = get_reg_double (18);
host_double_t z = func1l[fid].fun (x);
log_add ("emulate %sl(" PRID ") = " PRID, func1l[fid].name, x,x, z,z);
set_reg_double (18, z);
}
#endif // NO_DEMUL
// Magic values from avr-libc::stdio.h
#define AVRLIBC_SEEK_SET 0
#define AVRLIBC_SEEK_CUR 1
#define AVRLIBC_SEEK_END 2
#define AVRLIBC_EOF (-1)
// Handles for special streams, e.g. to fflush() them.
#define N_STD_FILES 3
#define HANDLE_stdin (-1)
#define HANDLE_stdout (-2)
#define HANDLE_stderr (-3)
#define AT "@"
#define FIND_UNUSED_FILE 0x1234
typedef int8_t handle_t;
typedef struct
{
handle_t handle;
bool binary_p;
bool std_file_p;
FILE *file;
char name[10];
} file_t;
static INLINE file_t*
find_file (int handle)
{
static file_t files[8 + N_STD_FILES];
static const int n_files = sizeof (files) / sizeof (*files);
static bool files_initialized_p;
if (!files_initialized_p)
{
files_initialized_p = true;
for (int i = N_STD_FILES; i < n_files; i++)
{
files[i].handle = i + 1 - N_STD_FILES;
sprintf (files[i].name, AT "%d", files[i].handle);
}
#define STD_INIT(f) \
files[-1 - HANDLE_##f] = (file_t) { HANDLE_##f, true, true, f, AT #f }
STD_INIT (stdin);
STD_INIT (stdout);
STD_INIT (stderr);
#undef STD_INIT
}
if (handle > 0 && handle <= n_files - N_STD_FILES)
{
// Return an already initialized / opened handle.
file_t *file = & files[handle - 1 + N_STD_FILES];
if (!file->file)
leave (LEAVE_HOSTIO, "file handle %s not open", file->name);
if (file->handle != handle)
leave (LEAVE_FATAL, "file %s handle %d should be %d",
file->name, file->handle, handle);
return file;
}
else if (-handle <= N_STD_FILES && handle < 0)
{
return & files[-1 - handle];
}
else if (handle == FIND_UNUSED_FILE)
{
// Search for an unused files[] slot.
file_t *file = files + N_STD_FILES;
for (int i = N_STD_FILES; i < n_files; i++, file++)
{
if (!file->file)
{
if (file->handle != i + 1 - N_STD_FILES)
leave (LEAVE_FATAL, "file %s handle %d should be %d",
file->name, file->handle, i + 1 - N_STD_FILES);
return file;
}
}
}
else
{
// We are called with an invalid handle.
leave (LEAVE_HOSTIO, "file handle %d out of range", handle);
}
leave (LEAVE_HOSTIO, "ran out of %d file handles", n_files - N_STD_FILES);
}
// FILE* fopen (const char *s_path, const char *s_mode)
static dword
host_fopen (dword args)
{