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typedef unsigned long int unsigned_word;
typedef signed long int signed_word;
typedef unsigned_word word;
typedef enum { ADD, ADD_CI, ADD_CO, ADD_CIO, SUB, SUB_CI, SUB_CO,
SUB_CIO, ADC_CI, ADC_CO, ADC_CIO, AND, IOR, XOR, ANDC, IORC, EQV,
NAND, NOR, AND_RC, IOR_RC, XOR_RC, ANDC_RC, IORC_RC, EQV_RC, NAND_RC,
NOR_RC, AND_CC, IOR_CC, XOR_CC, ANDC_CC, IORC_CC, EQV_CC, NAND_CC,
NOR_CC, LSHIFTR, ASHIFTR, SHIFTL, LSHIFTR_CO, ASHIFTR_CO, SHIFTL_CO,
ROTATEL, ROTATEL_CO, ROTATEXL_CIO, ASHIFTR_CON, EXTS1, EXTS2, EXTU1,
EXTU2, CLZ, CTZ, FF1, FF0, ABSVAL, NABSVAL, CMP, CPEQ, CPGE, CPGEU,
CPGT, CPGTU, CPLE, CPLEU, CPLT, CPLTU, CPNEQ, CMPPAR, DOZ, COPY,
EXCHANGE, COMCY, } opcode_t;
typedef struct
{
opcode_t opcode:8;
unsigned int s1:8;
unsigned int s2:8;
unsigned int d:8;
} insn_t;
enum prune_flags
{
NO_PRUNE = 0,
CY_0 = 1,
CY_1 = 2,
CY_JUST_SET = 4,
};
int flag_use_carry = 1;
inline
recurse(opcode_t opcode,
int d,
int s1,
int s2,
word v,
int cost,
insn_t *sequence,
int n_insns,
word *values,
int n_values,
const word goal_value,
int allowed_cost,
int cy,
int prune_flags)
{
insn_t insn;
allowed_cost -= cost;
if (allowed_cost > 0)
{
word old_d;
old_d = values[d];
values[d] = v;
insn.opcode = opcode;
insn.s1 = s1;
insn.s2 = s2;
insn.d = d;
sequence[n_insns] = insn;
synth(sequence, n_insns + 1, values, n_values,
goal_value, allowed_cost, cy, prune_flags);
values[d] = old_d;
}
else if (goal_value == v)
{
insn.opcode = opcode;
insn.s1 = s1;
insn.s2 = s2;
insn.d = d;
sequence[n_insns] = insn;
test_sequence(sequence, n_insns + 1);
}
}
synth(insn_t *sequence,
int n_insns,
word *values,
int n_values,
word goal_value,
int allowed_cost,
int ci,
int prune_hint)
{
int s1, s2;
word v, r1, r2;
int co;
int last_dest;
if (n_insns > 0)
last_dest = sequence[n_insns - 1].d;
else
last_dest = -1;
if (ci >= 0 && flag_use_carry)
{
for (s1 = n_values - 1; s1 >= 0; s1--)
{
r1 = values[s1];
for (s2 = s1 - 1; s2 >= 0; s2--)
{
r2 = values[s2];
if (allowed_cost <= 1 && (prune_hint & CY_JUST_SET) == 0)
{
if (last_dest >= 0 && s1 != last_dest && s2 != last_dest)
continue;
}
do { word __d = ( r1) + ( r2) + (( ci)); ( co) = ( ci) ? __d <= ( r1) : __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CIO, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r1) + ( r2) + (( ci)); ( co) = ( ci); (v) = __d; } while (0);
recurse(ADD_CI, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( r1) - ( r2) - (( ci)); ( co) = ( ci) ? __d >= ( r1) : __d > ( r1); (v) = __d; } while (0);
recurse(SUB_CIO, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r2) - ( r1) - (( ci)); ( co) = ( ci) ? __d >= ( r2) : __d > ( r2); (v) = __d; } while (0);
recurse(SUB_CIO, n_values, s2, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r1) - ( r2) - (( ci)); ( co) = ( ci); (v) = __d; } while (0);
recurse(SUB_CI, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( r2) - ( r1) - (( ci)); ( co) = ( ci); (v) = __d; } while (0);
recurse(SUB_CI, n_values, s2, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
}
}
}
for (s1 = n_values - 1; s1 >= 0; s1--)
{
r1 = values[s1];
for (s2 = s1 - 1; s2 >= 0; s2--)
{
r2 = values[s2];
if (allowed_cost <= 1)
{
if (last_dest >= 0 && s1 != last_dest && s2 != last_dest)
continue;
}
do { word __d = ( r1) + ( r2); ( co) = __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CO, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
((v) = ( r1) + ( r2), ( co) = ( ci));
recurse(ADD, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( r1) - ( r2); ( co) = __d > ( r1); (v) = __d; } while (0);
recurse(SUB_CO, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r2) - ( r1); ( co) = __d > ( r2); (v) = __d; } while (0);
recurse(SUB_CO, n_values, s2, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
((v) = ( r1) - ( r2), ( co) = ( ci));
recurse(SUB, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r2) - ( r1), ( co) = ( ci));
recurse(SUB, n_values, s2, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) & ( r2), ( co) = ( ci));
recurse(AND, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) | ( r2), ( co) = ( ci));
recurse(IOR, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) ^ ( r2), ( co) = ( ci));
recurse(XOR, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) & ~( r2), ( co) = ( ci));
recurse(ANDC, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r2) & ~( r1), ( co) = ( ci));
recurse(ANDC, n_values, s2, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) | ~( r2), ( co) = ( ci));
recurse(IORC, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r2) | ~( r1), ( co) = ( ci));
recurse(IORC, n_values, s2, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) ^ ~( r2), ( co) = ( ci));
recurse(EQV, n_values, s1, s2, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
}
}
if (ci >= 0 && flag_use_carry)
{
for (s1 = n_values - 1; s1 >= 0; s1--)
{
r1 = values[s1];
if (allowed_cost <= 1 && (prune_hint & CY_JUST_SET) == 0)
{
if (last_dest >= 0 && s1 != last_dest)
continue;
}
do { word __d = ( r1) + ( r1) + (( ci)); ( co) = ( ci) ? __d <= ( r1) : __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CIO, n_values, s1, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r1) + ( r1) + (( ci)); ( co) = ( ci); (v) = __d; } while (0);
recurse(ADD_CI, n_values, s1, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( r1) + ( -1 ) + (( ci)); ( co) = ( ci) ? __d <= ( r1) : __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CIO, n_values, s1, (0x20 + -1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r1) + ( 0 ) + (( ci)); ( co) = ( ci) ? __d <= ( r1) : __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CIO, n_values, s1, (0x20 + 0) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( 0 ) - ( r1) - (( ci)); ( co) = ( ci) ? __d >= ( 0 ) : __d > ( 0 ); (v) = __d; } while (0);
recurse(SUB_CIO, n_values, (0x20 + 0) , s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
}
}
for (s1 = n_values - 1; s1 >= 0; s1--)
{
r1 = values[s1];
if (allowed_cost <= 1)
{
if (last_dest >= 0 && s1 != last_dest)
continue;
}
do { word __d = ( r1) + ( r1); ( co) = __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CO, n_values, s1, s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
((v) = ( r1) & ( 1 ), ( co) = ( ci));
recurse(AND, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( r1) ^ ( 1 ), ( co) = ( ci));
recurse(XOR, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( -1 ) - ( r1), ( co) = ( ci));
recurse(SUB, n_values, (0x20 + -1) , s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( r1) + ( 1 ); ( co) = __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CO, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
((v) = ( r1) + ( 1 ), ( co) = ( ci));
recurse(ADD, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( r1) + ( -1 ); ( co) = __d < ( r1); (v) = __d; } while (0);
recurse(ADD_CO, n_values, s1, (0x20 + -1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( r1) - ( 1 ); ( co) = __d > ( r1); (v) = __d; } while (0);
recurse(SUB_CO, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
do { word __d = ( 0 ) - ( r1); ( co) = __d > ( 0 ); (v) = __d; } while (0);
recurse(SUB_CO, n_values, (0x20 + 0) , s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET);
((v) = ( 0 ) - ( r1), ( co) = ( ci));
recurse(SUB, n_values, (0x20 + 0) , s1, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ((unsigned_word) ( r1) >> (( 1 ) & (32 - 1)) ), ( co) = ( ci));
recurse(LSHIFTR, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ((signed_word) ( r1) >> (( 1 ) & (32 - 1)) ), ( co) = ( ci));
recurse(ASHIFTR, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ((signed_word) ( r1) << (( 1 ) & (32 - 1)) ), ( co) = ( ci));
recurse(SHIFTL, n_values, s1, (0x20 + 1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ((unsigned_word) ( r1) >> (( 32 -1 ) & (32 - 1)) ), ( co) = ( ci));
recurse(LSHIFTR, n_values, s1, (0x20 + 32 -1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ((signed_word) ( r1) >> (( 32 -1 ) & (32 - 1)) ), ( co) = ( ci));
recurse(ASHIFTR, n_values, s1, (0x20 + 32 -1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
}
if (ci >= 0 && flag_use_carry
&& (allowed_cost <= 1 ? ((prune_hint & CY_JUST_SET) != 0) : 1))
{
do { word __d = ( 0 ) + ( 0 ) + (( ci)); ( co) = ( ci) ? __d <= ( 0 ) : __d < ( 0 ); (v) = __d; } while (0);
recurse(ADD_CIO, n_values, (0x20 + 0) , (0x20 + 0) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET | CY_0);
do { word __d = ( 0 ) - ( 0 ) - (( ci)); ( co) = ( ci) ? __d >= ( 0 ) : __d > ( 0 ); (v) = __d; } while (0);
recurse(SUB_CIO, n_values, (0x20 + 0) , (0x20 + 0) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
do { word __d = ( 0 ) - ( -1 ) - (( ci)); ( co) = ( ci) ? __d >= ( 0 ) : __d > ( 0 ); (v) = __d; } while (0);
recurse(SUB_CIO, n_values, (0x20 + 0) , (0x20 + -1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, CY_JUST_SET | CY_1);
do { word __d = ( 0 ) + ( -1 ) + (( ci)); ( co) = ( ci) ? __d <= ( 0 ) : __d < ( 0 ); (v) = __d; } while (0);
recurse(ADD_CIO, n_values, (0x20 + 0) , (0x20 + -1) , v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
}
if (allowed_cost > 1)
{
((v) = ( 0x80000000 ), ( co) = ( ci));
recurse(COPY, n_values, (0x20 - 2) , 0, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( -1 ), ( co) = ( ci));
recurse(COPY, n_values, (0x20 + -1) , 0, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
((v) = ( 1 ), ( co) = ( ci));
recurse(COPY, n_values, (0x20 + 1) , 0, v, 1, sequence, n_insns, values, n_values + 1, goal_value, allowed_cost, co, prune_hint & ~CY_JUST_SET);
}
}
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