std::decimal

This is an implementation of the proposed C++ ISO/IEC JTC1 SC22 WG21 N2849 std::decimal including the ISO/IEC JTC1 SC22 WG21 N3871 revisions. It is built on the Intel Floating Point Library that does all the hard work.

Intent

I've used this implementation successfully in the past however I wanted build a modern version that relied on templates instead of macros to generate the numerous operators required.

Building

std::decimal currently requires a C++ 17 compiler. It is built and tested on macOS with Apple Clang from the latest Xcode and on Ubuntu with Clang 10.
The general_decimal_arithmetic/test_runner requires boost. If you don't want to install this just comment it out in the top level CMakeLists.txt
Check the supplied Dockerfile for detailed build requirements. This is the environment used to build in Github Actions here.

Floating Point Environment

The specification adds the following functions which have been implemented.

namespace std::decimal {

    int fe_dec_getround();
    int fe_dec_setround(int round);  

}

The specification does not add decimal specific exception state functions as described here. Because the state functions are opaque and we can't really use them I've introduced a decimal specific set by adding DEC_ and _dec_ to the names as follows.

namespace std::decimal {

    constexpr fexcept_t FE_DEC_DIVBYZERO;
    constexpr fexcept_t FE_DEC_INEXACT;
    constexpr fexcept_t FE_DEC_INVALID;
    constexpr fexcept_t FE_DEC_OVERFLOW;
    constexpr fexcept_t FE_DEC_UNDERFLOW;
    constexpr fexcept_t FE_DEC_ALL_EXCEPT;

    struct fenv_t;

    int fe_dec_clearexcept(int except);
    int fe_dec_raiseexcept(int except);
    int fe_dec_setexceptflag(const fexcept_t *pflag, int except);
    int fe_dec_getexceptflag(fexcept_t *pflag, int except);
    int fe_dec_testexcept(int except);
    int fe_dec_getenv(fenv_t *penv);
    int fe_dec_setenv(const fenv_t *penv);
    int fe_dec_holdexcept(fenv_t *penv);
    int fe_dec_updateenv(const fenv_t *penv);

}

Extensions

Support has been added for selectively throwing C++ exceptions.

// Throw std::decimal::exception if any of the exceptions in the except mask are raised.
// NB: Some operations will result in multiple floating point exceptions being raised and
// this will result in a single std::decimal::exception being thrown. The flags property of
/// this exception will include all raised exceptions.
void set_exceptions(int except) noexcept;
// Remove an exceptions in the except mask from the throw list.
void clear_exceptions(int except) noexcept;
// What exceptions have been configured to throw with set_exceptions?
int get_exceptions() noexcept;
// Check the decimal floating point environment exception flags and throw a std:decimal::exception if
// any exceptions have been raised.
// This function is called internally if any exceptions have been enabled with set_exceptions but it
// can also be called manually by the user.
void check_exceptions();

namespace std::decimal {

class exception : public std::exception
{
public:

    exception(fexcept_t flags);
    constexpr fexcept_t flags() const { return m_flags; }
    const char* what() const noexcept override { return m_what.c_str(); }

private:

    fexcept_t m_flags;
    std::string m_what;

};

}

Testing

The library is validated using the General Decimal Arithmetic Test Cases.

I'm currently in the process of building the test harness and implementing what is needed to run as many tests as possible so there are a lot of failures.
Failing tests are currently more likely to be problems mapping exceptions between the specification and the Intel library than real problems with the calculations.
Test cases that are not applicable or not yet supported will be explicitly skipped so this column will likely never get to zero.

Subset Arithmetic

decimal 32

Type	Operation	Passed	Failed	Skipped
decimal32	abs	46	0	13
decimal32	add	173	9	210
decimal32	base	0	0	772
decimal32	compare	343	0	70
decimal32	comparetotal	0	0	455
decimal32	divide	95	1	94
decimal32	divideint	0	0	173
decimal32	exp	69	33	217
decimal32	fma	2	7	0
decimal32	inexact	31	3	86
decimal32	ln	77	25	211
decimal32	log10	59	44	210
decimal32	max	29	2	36
decimal32	min	29	2	36
decimal32	minus	32	0	13
decimal32	multiply	74	0	118
decimal32	plus	51	0	13
decimal32	power	125	9	125
decimal32	quantize	221	142	65
decimal32	randombound32	0	0	2400
decimal32	randoms	0	0	4000
decimal32	reduce	0	0	106
decimal32	remainder	154	25	70
decimal32	remaindernear	0	0	263
decimal32	rescale	0	0	203
decimal32	rounding	511	217	0
decimal32	samequantum	64	0	0
decimal32	squareroot	2765	0	52
decimal32	subtract	203	22	294
decimal32	testall	0	0	0
decimal32	tointegral	0	0	70
decimal32	trim	0	0	93
decimal32		5153	541	10468

decimal 64

Type	Operation	Passed	Failed	Skipped
decimal64	abs	55	3	1
decimal64	add	219	139	34
decimal64	base	0	0	772
decimal64	compare	393	0	20
decimal64	comparetotal	0	0	455
decimal64	divide	134	10	46
decimal64	divideint	0	0	173
decimal64	exp	134	34	151
decimal64	fma	2	7	0
decimal64	inexact	67	46	7
decimal64	ln	163	30	120
decimal64	log10	134	47	132
decimal64	max	59	8	0
decimal64	min	59	8	0
decimal64	minus	41	3	1
decimal64	multiply	100	20	72
decimal64	plus	60	3	1
decimal64	power	168	58	33
decimal64	quantize	233	157	38
decimal64	randombound32	0	0	2400
decimal64	randoms	989	502	2509
decimal64	reduce	0	0	106
decimal64	remainder	179	44	26
decimal64	remaindernear	0	0	263
decimal64	rescale	0	0	203
decimal64	rounding	224	504	0
decimal64	samequantum	64	0	0
decimal64	squareroot	2808	2	7
decimal64	subtract	295	216	8
decimal64	testall	0	0	0
decimal64	tointegral	0	0	70
decimal64	trim	0	0	93
decimal64		6580	1841	7741

decimal 128

Type	Operation	Passed	Failed	Skipped
decimal128	abs	55	3	1
decimal128	add	214	156	22
decimal128	base	0	0	772
decimal128	compare	407	0	6
decimal128	comparetotal	0	0	455
decimal128	divide	135	10	45
decimal128	divideint	0	0	173
decimal128	exp	206	36	77
decimal128	fma	2	7	0
decimal128	inexact	50	63	7
decimal128	ln	225	36	52
decimal128	log10	208	46	59
decimal128	max	59	8	0
decimal128	min	59	8	0
decimal128	minus	41	3	1
decimal128	multiply	98	23	71
decimal128	plus	60	3	1
decimal128	power	169	59	31
decimal128	quantize	241	175	12
decimal128	randombound32	1812	273	315
decimal128	randoms	815	715	2470
decimal128	reduce	0	0	106
decimal128	remainder	180	44	25
decimal128	remaindernear	0	0	263
decimal128	rescale	0	0	203
decimal128	rounding	210	518	0
decimal128	samequantum	64	0	0
decimal128	squareroot	2815	2	0
decimal128	subtract	261	250	8
decimal128	testall	0	0	0
decimal128	tointegral	0	0	70
decimal128	trim	0	0	93
decimal128		8386	2438	5338

Extended Arithmetic

decimal 32

Type	Operation	Passed	Failed	Skipped
decimal32	abs	54	0	35
decimal32	add	845	55	1200
decimal32	and	0	0	279
decimal32	base	0	0	1168
decimal32	clamp	0	0	132
decimal32	class	0	0	84
decimal32	compare	449	0	190
decimal32	comparesig	0	0	625
decimal32	comparetotal	0	0	670
decimal32	comparetotmag	0	0	664
decimal32	copy	0	0	43
decimal32	copyabs	0	0	43
decimal32	copynegate	0	0	43
decimal32	copysign	0	0	111
decimal32	ddAbs	0	0	75
decimal32	ddAdd	0	0	1091
decimal32	ddAnd	0	0	287
decimal32	ddBase	0	0	945
decimal32	ddCanonical	0	0	230
decimal32	ddClass	0	0	42
decimal32	ddCompare	0	0	649
decimal32	ddCompareSig	0	0	559
decimal32	ddCompareTotal	0	0	613
decimal32	ddCompareTotalMag	0	0	613
decimal32	ddCopy	0	0	43
decimal32	ddCopyAbs	0	0	43
decimal32	ddCopyNegate	0	0	43
decimal32	ddCopySign	0	0	107
decimal32	ddDivide	0	0	717
decimal32	ddDivideInt	0	0	373
decimal32	ddEncode	0	0	376
decimal32	ddFMA	0	0	1378
decimal32	ddInvert	0	0	151
decimal32	ddLogB	0	0	108
decimal32	ddMax	0	0	256
decimal32	ddMaxMag	0	0	242
decimal32	ddMin	0	0	247
decimal32	ddMinMag	0	0	233
decimal32	ddMinus	0	0	43
decimal32	ddMultiply	0	0	446
decimal32	ddNextMinus	0	0	84
decimal32	ddNextPlus	0	0	84
decimal32	ddNextToward	0	0	304
decimal32	ddOr	0	0	237
decimal32	ddPlus	0	0	43
decimal32	ddQuantize	0	0	683
decimal32	ddReduce	0	0	134
decimal32	ddRemainder	0	0	505
decimal32	ddRemainderNear	0	0	529
decimal32	ddRotate	0	0	212
decimal32	ddSameQuantum	0	0	333
decimal32	ddScaleB	0	0	184
decimal32	ddShift	0	0	212
decimal32	ddSubtract	0	0	516
decimal32	ddToIntegral	0	0	178
decimal32	ddXor	0	0	278
decimal32	decDouble	0	0	0
decimal32	decQuad	0	0	0
decimal32	decSingle	0	0	0
decimal32	divide	453	4	174
decimal32	divideint	0	0	389
decimal32	dqAbs	0	0	75
decimal32	dqAdd	0	0	1012
decimal32	dqAnd	0	0	357
decimal32	dqBase	0	0	926
decimal32	dqCanonical	0	0	244
decimal32	dqClass	0	0	42
decimal32	dqCompare	0	0	659
decimal32	dqCompareSig	0	0	559
decimal32	dqCompareTotal	0	0	613
decimal32	dqCompareTotalMag	0	0	613
decimal32	dqCopy	0	0	43
decimal32	dqCopyAbs	0	0	43
decimal32	dqCopyNegate	0	0	43
decimal32	dqCopySign	0	0	107
decimal32	dqDivide	0	0	688
decimal32	dqDivideInt	0	0	374
decimal32	dqEncode	0	0	368
decimal32	dqFMA	0	0	1451
decimal32	dqInvert	0	0	193
decimal32	dqLogB	0	0	109
decimal32	dqMax	0	0	256
decimal32	dqMaxMag	0	0	242
decimal32	dqMin	0	0	247
decimal32	dqMinMag	0	0	233
decimal32	dqMinus	0	0	43
decimal32	dqMultiply	0	0	473
decimal32	dqNextMinus	0	0	84
decimal32	dqNextPlus	0	0	84
decimal32	dqNextToward	0	0	304
decimal32	dqOr	0	0	341
decimal32	dqPlus	0	0	43
decimal32	dqQuantize	0	0	686
decimal32	dqReduce	0	0	134
decimal32	dqRemainder	0	0	500
decimal32	dqRemainderNear	0	0	530
decimal32	dqRotate	0	0	248
decimal32	dqSameQuantum	0	0	333
decimal32	dqScaleB	0	0	202
decimal32	dqShift	0	0	248
decimal32	dqSubtract	0	0	520
decimal32	dqToIntegral	0	0	178
decimal32	dqXor	0	0	348
decimal32	dsBase	0	0	907
decimal32	dsEncode	0	0	268
decimal32	exp	94	42	304
decimal32	fma	1158	68	1386
decimal32	inexact	49	17	86
decimal32	invert	0	0	128
decimal32	ln	110	47	257
decimal32	log10	62	94	233
decimal32	logb	0	0	128
decimal32	max	231	8	88
decimal32	maxmag	0	0	312
decimal32	min	221	8	88
decimal32	minmag	0	0	303
decimal32	minus	77	0	36
decimal32	multiply	279	13	229
decimal32	nextminus	0	0	104
decimal32	nextplus	0	0	106
decimal32	nexttoward	0	0	341
decimal32	or	0	0	276
decimal32	plus	77	0	45
decimal32	power	508	29	670
decimal32	powersqrt	2791	4	61
decimal32	quantize	283	291	201
decimal32	randombound32	0	0	2400
decimal32	randoms	0	0	4000
decimal32	reduce	0	0	168
decimal32	remainder	378	39	100
decimal32	remaindernear	0	0	446
decimal32	rescale	0	0	617
decimal32	rotate	0	0	195
decimal32	rounding	714	248	68
decimal32	samequantum	301	0	32
decimal32	scaleb	0	0	155
decimal32	shift	0	0	200
decimal32	squareroot	3098	284	204
decimal32	subtract	310	15	356
decimal32	testall	0	0	0
decimal32	tointegral	0	0	168
decimal32	tointegralx	0	0	180
decimal32	trim	0	0	110
decimal32	xor	0	0	277
decimal32		12542	1266	51305

decimal 64

Type	Operation	Passed	Failed	Skipped
decimal64	abs	63	3	23
decimal64	add	1563	273	264
decimal64	and	0	0	279
decimal64	base	0	0	1168
decimal64	clamp	0	0	132
decimal64	class	0	0	84
decimal64	compare	517	0	122
decimal64	comparesig	0	0	625
decimal64	comparetotal	0	0	670
decimal64	comparetotmag	0	0	664
decimal64	copy	0	0	43
decimal64	copyabs	0	0	43
decimal64	copynegate	0	0	43
decimal64	copysign	0	0	111
decimal64	ddAbs	0	0	75
decimal64	ddAdd	0	0	1091
decimal64	ddAnd	0	0	287
decimal64	ddBase	0	0	945
decimal64	ddCanonical	0	0	230
decimal64	ddClass	0	0	42
decimal64	ddCompare	0	0	649
decimal64	ddCompareSig	0	0	559
decimal64	ddCompareTotal	0	0	613
decimal64	ddCompareTotalMag	0	0	613
decimal64	ddCopy	0	0	43
decimal64	ddCopyAbs	0	0	43
decimal64	ddCopyNegate	0	0	43
decimal64	ddCopySign	0	0	107
decimal64	ddDivide	0	0	717
decimal64	ddDivideInt	0	0	373
decimal64	ddEncode	0	0	376
decimal64	ddFMA	0	0	1378
decimal64	ddInvert	0	0	151
decimal64	ddLogB	0	0	108
decimal64	ddMax	0	0	256
decimal64	ddMaxMag	0	0	242
decimal64	ddMin	0	0	247
decimal64	ddMinMag	0	0	233
decimal64	ddMinus	0	0	43
decimal64	ddMultiply	0	0	446
decimal64	ddNextMinus	0	0	84
decimal64	ddNextPlus	0	0	84
decimal64	ddNextToward	0	0	304
decimal64	ddOr	0	0	237
decimal64	ddPlus	0	0	43
decimal64	ddQuantize	0	0	683
decimal64	ddReduce	0	0	134
decimal64	ddRemainder	0	0	505
decimal64	ddRemainderNear	0	0	529
decimal64	ddRotate	0	0	212
decimal64	ddSameQuantum	0	0	333
decimal64	ddScaleB	0	0	184
decimal64	ddShift	0	0	212
decimal64	ddSubtract	0	0	516
decimal64	ddToIntegral	0	0	178
decimal64	ddXor	0	0	278
decimal64	decDouble	0	0	0
decimal64	decQuad	0	0	0
decimal64	decSingle	0	0	0
decimal64	divide	515	14	102
decimal64	divideint	0	0	389
decimal64	dqAbs	0	0	75
decimal64	dqAdd	0	0	1012
decimal64	dqAnd	0	0	357
decimal64	dqBase	0	0	926
decimal64	dqCanonical	0	0	244
decimal64	dqClass	0	0	42
decimal64	dqCompare	0	0	659
decimal64	dqCompareSig	0	0	559
decimal64	dqCompareTotal	0	0	613
decimal64	dqCompareTotalMag	0	0	613
decimal64	dqCopy	0	0	43
decimal64	dqCopyAbs	0	0	43
decimal64	dqCopyNegate	0	0	43
decimal64	dqCopySign	0	0	107
decimal64	dqDivide	0	0	688
decimal64	dqDivideInt	0	0	374
decimal64	dqEncode	0	0	368
decimal64	dqFMA	0	0	1451
decimal64	dqInvert	0	0	193
decimal64	dqLogB	0	0	109
decimal64	dqMax	0	0	256
decimal64	dqMaxMag	0	0	242
decimal64	dqMin	0	0	247
decimal64	dqMinMag	0	0	233
decimal64	dqMinus	0	0	43
decimal64	dqMultiply	0	0	473
decimal64	dqNextMinus	0	0	84
decimal64	dqNextPlus	0	0	84
decimal64	dqNextToward	0	0	304
decimal64	dqOr	0	0	341
decimal64	dqPlus	0	0	43
decimal64	dqQuantize	0	0	686
decimal64	dqReduce	0	0	134
decimal64	dqRemainder	0	0	500
decimal64	dqRemainderNear	0	0	530
decimal64	dqRotate	0	0	248
decimal64	dqSameQuantum	0	0	333
decimal64	dqScaleB	0	0	202
decimal64	dqShift	0	0	248
decimal64	dqSubtract	0	0	520
decimal64	dqToIntegral	0	0	178
decimal64	dqXor	0	0	348
decimal64	dsBase	0	0	907
decimal64	dsEncode	0	0	268
decimal64	exp	221	48	171
decimal64	fma	1904	288	420
decimal64	inexact	85	60	7
decimal64	invert	0	0	128
decimal64	ln	207	52	155
decimal64	log10	157	98	134
decimal64	logb	0	0	128
decimal64	max	261	14	52
decimal64	maxmag	0	0	312
decimal64	min	251	14	52
decimal64	minmag	0	0	303
decimal64	minus	86	3	24
decimal64	multiply	298	29	194
decimal64	nextminus	0	0	104
decimal64	nextplus	0	0	106
decimal64	nexttoward	0	0	341
decimal64	or	0	0	276
decimal64	plus	91	3	28
decimal64	power	767	65	375
decimal64	powersqrt	2840	9	7
decimal64	quantize	296	322	157
decimal64	randombound32	0	0	2400
decimal64	randoms	1004	469	2527
decimal64	reduce	0	0	168
decimal64	remainder	411	59	47
decimal64	remaindernear	0	0	446
decimal64	rescale	0	0	617
decimal64	rotate	0	0	195
decimal64	rounding	346	616	68
decimal64	samequantum	301	0	32
decimal64	scaleb	0	0	155
decimal64	shift	0	0	200
decimal64	squareroot	3217	309	60
decimal64	subtract	476	154	51
decimal64	testall	0	0	0
decimal64	tointegral	0	0	168
decimal64	tointegralx	0	0	180
decimal64	trim	0	0	110
decimal64	xor	0	0	277
decimal64		15877	2902	46334

decimal 128

Type	Operation	Passed	Failed	Skipped
decimal128	abs	73	15	1
decimal128	add	1265	798	37
decimal128	and	0	0	279
decimal128	base	0	0	1168
decimal128	clamp	0	0	132
decimal128	class	0	0	84
decimal128	compare	546	0	93
decimal128	comparesig	0	0	625
decimal128	comparetotal	0	0	670
decimal128	comparetotmag	0	0	664
decimal128	copy	0	0	43
decimal128	copyabs	0	0	43
decimal128	copynegate	0	0	43
decimal128	copysign	0	0	111
decimal128	ddAbs	0	0	75
decimal128	ddAdd	0	0	1091
decimal128	ddAnd	0	0	287
decimal128	ddBase	0	0	945
decimal128	ddCanonical	0	0	230
decimal128	ddClass	0	0	42
decimal128	ddCompare	0	0	649
decimal128	ddCompareSig	0	0	559
decimal128	ddCompareTotal	0	0	613
decimal128	ddCompareTotalMag	0	0	613
decimal128	ddCopy	0	0	43
decimal128	ddCopyAbs	0	0	43
decimal128	ddCopyNegate	0	0	43
decimal128	ddCopySign	0	0	107
decimal128	ddDivide	0	0	717
decimal128	ddDivideInt	0	0	373
decimal128	ddEncode	0	0	376
decimal128	ddFMA	0	0	1378
decimal128	ddInvert	0	0	151
decimal128	ddLogB	0	0	108
decimal128	ddMax	0	0	256
decimal128	ddMaxMag	0	0	242
decimal128	ddMin	0	0	247
decimal128	ddMinMag	0	0	233
decimal128	ddMinus	0	0	43
decimal128	ddMultiply	0	0	446
decimal128	ddNextMinus	0	0	84
decimal128	ddNextPlus	0	0	84
decimal128	ddNextToward	0	0	304
decimal128	ddOr	0	0	237
decimal128	ddPlus	0	0	43
decimal128	ddQuantize	0	0	683
decimal128	ddReduce	0	0	134
decimal128	ddRemainder	0	0	505
decimal128	ddRemainderNear	0	0	529
decimal128	ddRotate	0	0	212
decimal128	ddSameQuantum	0	0	333
decimal128	ddScaleB	0	0	184
decimal128	ddShift	0	0	212
decimal128	ddSubtract	0	0	516
decimal128	ddToIntegral	0	0	178
decimal128	ddXor	0	0	278
decimal128	decDouble	0	0	0
decimal128	decQuad	0	0	0
decimal128	decSingle	0	0	0
decimal128	divide	554	15	62
decimal128	divideint	0	0	389
decimal128	dqAbs	0	0	75
decimal128	dqAdd	0	0	1012
decimal128	dqAnd	0	0	357
decimal128	dqBase	0	0	926
decimal128	dqCanonical	0	0	244
decimal128	dqClass	0	0	42
decimal128	dqCompare	0	0	659
decimal128	dqCompareSig	0	0	559
decimal128	dqCompareTotal	0	0	613
decimal128	dqCompareTotalMag	0	0	613
decimal128	dqCopy	0	0	43
decimal128	dqCopyAbs	0	0	43
decimal128	dqCopyNegate	0	0	43
decimal128	dqCopySign	0	0	107
decimal128	dqDivide	0	0	688
decimal128	dqDivideInt	0	0	374
decimal128	dqEncode	0	0	368
decimal128	dqFMA	0	0	1451
decimal128	dqInvert	0	0	193
decimal128	dqLogB	0	0	109
decimal128	dqMax	0	0	256
decimal128	dqMaxMag	0	0	242
decimal128	dqMin	0	0	247
decimal128	dqMinMag	0	0	233
decimal128	dqMinus	0	0	43
decimal128	dqMultiply	0	0	473
decimal128	dqNextMinus	0	0	84
decimal128	dqNextPlus	0	0	84
decimal128	dqNextToward	0	0	304
decimal128	dqOr	0	0	341
decimal128	dqPlus	0	0	43
decimal128	dqQuantize	0	0	686
decimal128	dqReduce	0	0	134
decimal128	dqRemainder	0	0	500
decimal128	dqRemainderNear	0	0	530
decimal128	dqRotate	0	0	248
decimal128	dqSameQuantum	0	0	333
decimal128	dqScaleB	0	0	202
decimal128	dqShift	0	0	248
decimal128	dqSubtract	0	0	520
decimal128	dqToIntegral	0	0	178
decimal128	dqXor	0	0	348
decimal128	dsBase	0	0	907
decimal128	dsEncode	0	0	268
decimal128	exp	286	69	85
decimal128	fma	1651	855	106
decimal128	inexact	68	77	7
decimal128	invert	0	0	128
decimal128	ln	270	70	74
decimal128	log10	231	99	59
decimal128	logb	0	0	128
decimal128	max	277	20	30
decimal128	maxmag	0	0	312
decimal128	min	267	20	30
decimal128	minmag	0	0	303
decimal128	minus	96	15	2
decimal128	multiply	345	70	106
decimal128	nextminus	0	0	104
decimal128	nextplus	0	0	106
decimal128	nexttoward	0	0	341
decimal128	or	0	0	276
decimal128	plus	101	19	2
decimal128	power	901	123	183
decimal128	powersqrt	2847	9	0
decimal128	quantize	340	383	52
decimal128	randombound32	1848	186	366
decimal128	randoms	830	682	2488
decimal128	reduce	0	0	168
decimal128	remainder	424	59	34
decimal128	remaindernear	0	0	446
decimal128	rescale	0	0	617
decimal128	rotate	0	0	195
decimal128	rounding	330	632	68
decimal128	samequantum	333	0	0
decimal128	scaleb	0	0	155
decimal128	shift	0	0	200
decimal128	squareroot	3224	339	23
decimal128	subtract	457	206	18
decimal128	testall	0	0	0
decimal128	tointegral	0	0	168
decimal128	tointegralx	0	0	180
decimal128	trim	0	0	110
decimal128	xor	0	0	277
decimal128		17564	4761	42788

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README.md

README.md

std::decimal

Intent

Building

Floating Point Environment

Extensions

Testing

Subset Arithmetic

Extended Arithmetic

Files

README.md

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README.md

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std::decimal

Intent

Building

Floating Point Environment

Extensions

Testing

Subset Arithmetic

Extended Arithmetic