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py: Fix float/complex binop returning NULL; implement complex power.

This commit is contained in:
Damien George 2014-04-10 20:08:11 +01:00
parent f31b6ff334
commit ae491055fa
4 changed files with 45 additions and 5 deletions
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4
py/obj.h
View File

@ -429,11 +429,11 @@ typedef struct _mp_obj_float_t {
mp_float_t value;
} mp_obj_float_t;
mp_float_t mp_obj_float_get(mp_obj_t self_in);
mp_obj_t mp_obj_float_binary_op(int op, mp_float_t lhs_val, mp_obj_t rhs);
mp_obj_t mp_obj_float_binary_op(int op, mp_float_t lhs_val, mp_obj_t rhs); // can return MP_OBJ_NULL
// complex
void mp_obj_complex_get(mp_obj_t self_in, mp_float_t *real, mp_float_t *imag);
mp_obj_t mp_obj_complex_binary_op(int op, mp_float_t lhs_real, mp_float_t lhs_imag, mp_obj_t rhs_in);
mp_obj_t mp_obj_complex_binary_op(int op, mp_float_t lhs_real, mp_float_t lhs_imag, mp_obj_t rhs_in); // can return MP_OBJ_NULL
#endif
// tuple

29
py/objcomplex.c
View File

@ -11,6 +11,8 @@
#if MICROPY_ENABLE_FLOAT
#include <math.h>
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
#include "formatfloat.h"
#endif
@ -176,6 +178,33 @@ mp_obj_t mp_obj_complex_binary_op(int op, mp_float_t lhs_real, mp_float_t lhs_im
}
break;
case MP_BINARY_OP_POWER:
case MP_BINARY_OP_INPLACE_POWER: {
// z1**z2 = exp(z2*ln(z1))
// = exp(z2*(ln(|z1|)+i*arg(z1)))
// = exp( (x2*ln1 - y2*arg1) + i*(y2*ln1 + x2*arg1) )
// = exp(x3 + i*y3)
// = exp(x3)*(cos(y3) + i*sin(y3))
mp_float_t abs1 = MICROPY_FLOAT_C_FUN(sqrt)(lhs_real*lhs_real + lhs_imag*lhs_imag);
if (abs1 == 0) {
if (rhs_imag == 0) {
lhs_real = 1;
rhs_real = 0;
} else {
nlr_raise(mp_obj_new_exception_msg(&mp_type_ZeroDivisionError, "0.0 to a complex power"));
}
} else {
mp_float_t ln1 = MICROPY_FLOAT_C_FUN(log)(abs1);
mp_float_t arg1 = MICROPY_FLOAT_C_FUN(atan2)(lhs_imag, lhs_real);
mp_float_t x3 = rhs_real * ln1 - rhs_imag * arg1;
mp_float_t y3 = rhs_imag * ln1 + rhs_real * arg1;
mp_float_t exp_x3 = MICROPY_FLOAT_C_FUN(exp)(x3);
lhs_real = exp_x3 * MICROPY_FLOAT_C_FUN(cos)(y3);
lhs_imag = exp_x3 * MICROPY_FLOAT_C_FUN(sin)(y3);
}
break;
}
default:
return MP_OBJ_NULL; // op not supported
}

2
py/objfloat.c
View File

@ -136,7 +136,7 @@ check_zero_division:
case MP_BINARY_OP_MORE_EQUAL: return MP_BOOL(lhs_val >= rhs_val);
default:
return NULL; // op not supported
return MP_OBJ_NULL; // op not supported
}
return mp_obj_new_float(lhs_val);
}

15
py/runtime.c
View File

@ -386,9 +386,19 @@ mp_obj_t mp_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
}
#if MICROPY_ENABLE_FLOAT
} else if (MP_OBJ_IS_TYPE(rhs, &mp_type_float)) {
return mp_obj_float_binary_op(op, lhs_val, rhs);
mp_obj_t res = mp_obj_float_binary_op(op, lhs_val, rhs);
if (res == MP_OBJ_NULL) {
goto unsupported_op;
} else {
return res;
}
} else if (MP_OBJ_IS_TYPE(rhs, &mp_type_complex)) {
return mp_obj_complex_binary_op(op, lhs_val, 0, rhs);
mp_obj_t res = mp_obj_complex_binary_op(op, lhs_val, 0, rhs);
if (res == MP_OBJ_NULL) {
goto unsupported_op;
} else {
return res;
}
#endif
}
}
@ -438,6 +448,7 @@ generic_binary_op:
// TODO implement dispatch for reverse binary ops
// TODO specify in error message what the operator is
unsupported_op:
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"unsupported operand types for binary operator: '%s', '%s'",
mp_obj_get_type_str(lhs), mp_obj_get_type_str(rhs)));