void __ieee_to_host_128 (decimal128 in, _Decimal128 *out);
#endif
-/* A pointer to a unary decNumber operation. */
-typedef decNumber* (*dfp_unary_func)
- (decNumber *, decNumber *, decContext *);
-
-/* A pointer to a binary decNumber operation. */
-typedef decNumber* (*dfp_binary_func)
- (decNumber *, const decNumber *, const decNumber *, decContext *);
-
-extern uint32_t __dec_byte_swap (uint32_t);
+/* A pointer to a binary decFloat operation. */
+typedef decFloat* (*dfp_binary_func)
+ (decFloat *, const decFloat *, const decFloat *, decContext *);
\f
-/* Unary operations. */
+/* Binary operations. */
-static inline DFP_C_TYPE
-dfp_unary_op (dfp_unary_func op, DFP_C_TYPE arg)
+/* Use a decFloat (decDouble or decQuad) function to perform a DFP
+ binary operation. */
+static inline decFloat
+dfp_binary_op (dfp_binary_func op, decFloat arg_a, decFloat arg_b)
{
- DFP_C_TYPE result;
+ decFloat result;
decContext context;
- decNumber arg1, res;
- IEEE_TYPE a, encoded_result;
-
- HOST_TO_IEEE (arg, &a);
decContextDefault (&context, CONTEXT_INIT);
DFP_INIT_ROUNDMODE (context.round);
- TO_INTERNAL (&a, &arg1);
-
/* Perform the operation. */
- op (&res, &arg1, &context);
+ op (&result, &arg_a, &arg_b, &context);
if (DFP_EXCEPTIONS_ENABLED && context.status != 0)
{
DFP_HANDLE_EXCEPTIONS (ieee_flags);
}
- TO_ENCODED (&encoded_result, &res, &context);
- IEEE_TO_HOST (encoded_result, &result);
return result;
}
-/* Binary operations. */
-
-static inline DFP_C_TYPE
-dfp_binary_op (dfp_binary_func op, DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
+#if WIDTH == 32
+/* The decNumber package doesn't provide arithmetic for decSingle (32 bits);
+ convert to decDouble, use the operation for that, and convert back. */
+static inline _Decimal32
+d32_binary_op (dfp_binary_func op, _Decimal32 arg_a, _Decimal32 arg_b)
{
- DFP_C_TYPE result;
+ union { _Decimal32 c; decSingle f; } a32, b32, res32;
+ decDouble a, b, res;
decContext context;
- decNumber arg1, arg2, res;
- IEEE_TYPE a, b, encoded_result;
- HOST_TO_IEEE (arg_a, &a);
- HOST_TO_IEEE (arg_b, &b);
+ /* Widen the operands and perform the operation. */
+ a32.c = arg_a;
+ b32.c = arg_b;
+ decSingleToWider (&a32.f, &a);
+ decSingleToWider (&b32.f, &b);
+ res = dfp_binary_op (op, a, b);
+ /* Narrow the result, which might result in an underflow or overflow. */
decContextDefault (&context, CONTEXT_INIT);
DFP_INIT_ROUNDMODE (context.round);
-
- TO_INTERNAL (&a, &arg1);
- TO_INTERNAL (&b, &arg2);
-
- /* Perform the operation. */
- op (&res, &arg1, &arg2, &context);
-
+ decSingleFromWider (&res32.f, &res, &context);
if (DFP_EXCEPTIONS_ENABLED && context.status != 0)
{
/* decNumber exception flags we care about here. */
int ieee_flags;
- int dec_flags = DEC_IEEE_854_Division_by_zero | DEC_IEEE_854_Inexact
- | DEC_IEEE_854_Invalid_operation | DEC_IEEE_854_Overflow
+ int dec_flags = DEC_IEEE_854_Inexact | DEC_IEEE_854_Overflow
| DEC_IEEE_854_Underflow;
dec_flags &= context.status;
ieee_flags = DFP_IEEE_FLAGS (dec_flags);
DFP_HANDLE_EXCEPTIONS (ieee_flags);
}
- TO_ENCODED (&encoded_result, &res, &context);
- IEEE_TO_HOST (encoded_result, &result);
- return result;
+ return res32.c;
+}
+#else
+/* decFloat operations are supported for decDouble (64 bits) and
+ decQuad (128 bits). The bit patterns for the types are the same. */
+static inline DFP_C_TYPE
+dnn_binary_op (dfp_binary_func op, DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
+{
+ union { DFP_C_TYPE c; decFloat f; } a, b, result;
+
+ a.c = arg_a;
+ b.c = arg_b;
+ result.f = dfp_binary_op (op, a.f, b.f);
+ return result.c;
}
+#endif
/* Comparison operations. */
-static inline int
-dfp_compare_op (dfp_binary_func op, DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
+/* Use a decFloat (decDouble or decQuad) function to perform a DFP
+ comparison. */
+static inline CMPtype
+dfp_compare_op (dfp_binary_func op, decFloat arg_a, decFloat arg_b)
{
- IEEE_TYPE a, b;
decContext context;
- decNumber arg1, arg2, res;
+ decFloat res;
int result;
- HOST_TO_IEEE (arg_a, &a);
- HOST_TO_IEEE (arg_b, &b);
-
decContextDefault (&context, CONTEXT_INIT);
DFP_INIT_ROUNDMODE (context.round);
- TO_INTERNAL (&a, &arg1);
- TO_INTERNAL (&b, &arg2);
-
/* Perform the comparison. */
- op (&res, &arg1, &arg2, &context);
+ op (&res, &arg_a, &arg_b, &context);
- if (decNumberIsNegative (&res))
+ if (DEC_FLOAT_IS_SIGNED (&res))
result = -1;
- else if (decNumberIsZero (&res))
+ else if (DEC_FLOAT_IS_ZERO (&res))
result = 0;
- else if (decNumberIsNaN (&res))
+ else if (DEC_FLOAT_IS_NAN (&res))
result = -2;
else
result = 1;
- return result;
+ return (CMPtype) result;
+}
+
+#if WIDTH == 32
+/* The decNumber package doesn't provide comparisons for decSingle (32 bits);
+ convert to decDouble, use the operation for that, and convert back. */
+static inline CMPtype
+d32_compare_op (dfp_binary_func op, _Decimal32 arg_a, _Decimal32 arg_b)
+{
+ union { _Decimal32 c; decSingle f; } a32, b32;
+ decDouble a, b;
+
+ a32.c = arg_a;
+ b32.c = arg_b;
+ decSingleToWider (&a32.f, &a);
+ decSingleToWider (&b32.f, &b);
+ return dfp_compare_op (op, a, b);
}
+#else
+/* decFloat comparisons are supported for decDouble (64 bits) and
+ decQuad (128 bits). The bit patterns for the types are the same. */
+static inline CMPtype
+dnn_compare_op (dfp_binary_func op, DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
+{
+ union { DFP_C_TYPE c; decFloat f; } a, b;
+ a.c = arg_a;
+ b.c = arg_b;
+ return dfp_compare_op (op, a.f, b.f);
+}
+#endif
\f
#if defined(L_conv_sd)
void
__host_to_ieee_32 (_Decimal32 in, decimal32 *out)
{
- uint32_t t;
-
- if (!LIBGCC2_FLOAT_WORDS_BIG_ENDIAN)
- {
- memcpy (&t, &in, 4);
- t = __dec_byte_swap (t);
- memcpy (out, &t, 4);
- }
- else
- memcpy (out, &in, 4);
+ memcpy (out, &in, 4);
}
void
__ieee_to_host_32 (decimal32 in, _Decimal32 *out)
{
- uint32_t t;
-
- if (!LIBGCC2_FLOAT_WORDS_BIG_ENDIAN)
- {
- memcpy (&t, &in, 4);
- t = __dec_byte_swap (t);
- memcpy (out, &t, 4);
- }
- else
- memcpy (out, &in, 4);
+ memcpy (out, &in, 4);
}
#endif /* L_conv_sd */
#if defined(L_conv_dd)
-static void
-__swap64 (char *src, char *dst)
-{
- uint32_t t1, t2;
-
- if (!LIBGCC2_FLOAT_WORDS_BIG_ENDIAN)
- {
- memcpy (&t1, src, 4);
- memcpy (&t2, src + 4, 4);
- t1 = __dec_byte_swap (t1);
- t2 = __dec_byte_swap (t2);
- memcpy (dst, &t2, 4);
- memcpy (dst + 4, &t1, 4);
- }
- else
- memcpy (dst, src, 8);
-}
-
void
__host_to_ieee_64 (_Decimal64 in, decimal64 *out)
{
- __swap64 ((char *) &in, (char *) out);
+ memcpy (out, &in, 8);
}
void
__ieee_to_host_64 (decimal64 in, _Decimal64 *out)
{
- __swap64 ((char *) &in, (char *) out);
+ memcpy (out, &in, 8);
}
#endif /* L_conv_dd */
#if defined(L_conv_td)
-static void
-__swap128 (char *src, char *dst)
-{
- uint32_t t1, t2, t3, t4;
-
- if (!LIBGCC2_FLOAT_WORDS_BIG_ENDIAN)
- {
- memcpy (&t1, src, 4);
- memcpy (&t2, src + 4, 4);
- memcpy (&t3, src + 8, 4);
- memcpy (&t4, src + 12, 4);
- t1 = __dec_byte_swap (t1);
- t2 = __dec_byte_swap (t2);
- t3 = __dec_byte_swap (t3);
- t4 = __dec_byte_swap (t4);
- memcpy (dst, &t4, 4);
- memcpy (dst + 4, &t3, 4);
- memcpy (dst + 8, &t2, 4);
- memcpy (dst + 12, &t1, 4);
- }
- else
- memcpy (dst, src, 16);
-}
-
void
__host_to_ieee_128 (_Decimal128 in, decimal128 *out)
{
- __swap128 ((char *) &in, (char *) out);
+ memcpy (out, &in, 16);
}
void
__ieee_to_host_128 (decimal128 in, _Decimal128 *out)
{
- __swap128 ((char *) &in, (char *) out);
+ memcpy (out, &in, 16);
}
#endif /* L_conv_td */
DFP_C_TYPE
DFP_ADD (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
- return dfp_binary_op (decNumberAdd, arg_a, arg_b);
+ return DFP_BINARY_OP (DEC_FLOAT_ADD, arg_a, arg_b);
}
DFP_C_TYPE
DFP_SUB (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
- return dfp_binary_op (decNumberSubtract, arg_a, arg_b);
+ return DFP_BINARY_OP (DEC_FLOAT_SUBTRACT, arg_a, arg_b);
}
#endif /* L_addsub */
DFP_C_TYPE
DFP_MULTIPLY (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
- return dfp_binary_op (decNumberMultiply, arg_a, arg_b);
+ return DFP_BINARY_OP (DEC_FLOAT_MULTIPLY, arg_a, arg_b);
}
#endif /* L_mul */
DFP_C_TYPE
DFP_DIVIDE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
- return dfp_binary_op (decNumberDivide, arg_a, arg_b);
+ return DFP_BINARY_OP (DEC_FLOAT_DIVIDE, arg_a, arg_b);
}
#endif /* L_div */
CMPtype
DFP_EQ (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
- int stat;
- stat = dfp_compare_op (decNumberCompare, arg_a, arg_b);
+ CMPtype stat;
+ stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);
/* For EQ return zero for true, nonzero for false. */
return stat != 0;
}
DFP_NE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
int stat;
- stat = dfp_compare_op (decNumberCompare, arg_a, arg_b);
+ stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);
/* For NE return zero for true, nonzero for false. */
if (__builtin_expect (stat == -2, 0)) /* An operand is NaN. */
return 1;
DFP_LT (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
int stat;
- stat = dfp_compare_op (decNumberCompare, arg_a, arg_b);
+ stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);
/* For LT return -1 (<0) for true, 1 for false. */
return (stat == -1) ? -1 : 1;
}
DFP_GT (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
int stat;
- stat = dfp_compare_op (decNumberCompare, arg_a, arg_b);
+ stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);
/* For GT return 1 (>0) for true, -1 for false. */
return (stat == 1) ? 1 : -1;
}
DFP_LE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
int stat;
- stat = dfp_compare_op (decNumberCompare, arg_a, arg_b);
+ stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);
/* For LE return 0 (<= 0) for true, 1 for false. */
if (__builtin_expect (stat == -2, 0)) /* An operand is NaN. */
return 1;
DFP_GE (DFP_C_TYPE arg_a, DFP_C_TYPE arg_b)
{
int stat;
- stat = dfp_compare_op (decNumberCompare, arg_a, arg_b);
+ stat = DFP_COMPARE_OP (DEC_FLOAT_COMPARE, arg_a, arg_b);
/* For GE return 1 (>=0) for true, -1 for false. */
if (__builtin_expect (stat == -2, 0)) /* An operand is NaN. */
return -1;
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