diff --git a/src/equals.jl b/src/equals.jl
index 3ecab68..ef8b84e 100644
--- a/src/equals.jl
+++ b/src/equals.jl
@@ -1,45 +1,85 @@
-# Equality
+_sign(x::Decimal) = x.s ? -1 : 1
 
-# equals() now depends on == instead
-# of the other way round.
-function Base.:(==)(x::Decimal, y::Decimal)
-    # return early on zero
-    x_is_zero = iszero(x)
-    y_is_zero = iszero(y)
-    if x_is_zero || y_is_zero
-        return x_is_zero === y_is_zero
+function Base.cmp(x::Decimal, y::Decimal)
+    if iszero(x) && iszero(y)
+        return 0
+    elseif iszero(x) # && !iszero(y)
+        return -_sign(y)
+    elseif iszero(y) # && !iszero(x)
+        return _sign(x)
     end
 
-    a = normalize(x)
-    b = normalize(y)
-    a.c == b.c && a.q == b.q && a.s == b.s
-end
+    # Neither x nor y is zero here
 
-function Base.:(<)(x::Decimal, y::Decimal)
-    # return early on zero
-    if iszero(x) && iszero(y)
-        return false
+    if x.s != y.s
+        # x and y have different signs, so
+        #  if x < 0, then return -1 (because y is positive)
+        #  if x > 0, then return +1 (because y is negative)
+        return _sign(x)
     end
 
-    # avoid normalization if possible
-    if x.q == y.q
-        return isless(x.s == 0 ? x.c : -x.c, y.s == 0 ? y.c : -y.c)
+    cmp_c = cmp(x.c, y.c)
+    cmp_q = cmp(x.q, y.q)
+
+    # If both x.c and x.q is greater (or equal, or less) than y.c and y.q,
+    # then x is greater (or equal, or less) than y
+    if cmp_c == cmp_q
+        return cmp_c
     end
 
-    diff = y - x
+    # Adjusted exponent of x and y
+    # It is the position of the most significant digit with respect to
+    # the decimal point
+    expx = ndigits(x.c) + x.q - 1
+    expy = ndigits(y.c) + y.q - 1
 
-    farther_from_0 = diff.c > 0 || (iszero(diff.c) && diff.q > 0)
+    # If expx > expy, then abs(x) > abs(y)
+    # If expx < expy, then abs(x) < abs(y)
+    #
+    # Then we need to consider the sign, which is the same for x and y here
+    #
+    # Overall:
+    #  -1  if expx > expy and they are negative
+    #  +1  if expx > expy and they are positive
+    #  -1  if expx < expy and they are positive
+    #  +1  if expx < expy and they are negative
+    if expx != expy
+        s = _sign(x) # same as _sign(y)
+        return ifelse(expx > expy, s, -s)
+    end
 
-    if diff.s == 1
-        return !farther_from_0
+    #  cmp(x, y) = sign(x - y)
+    #            = sign(sign(x) * abs(x) - sign(y) * abs(y))
+    #
+    # We know that x and y have the same sign here:
+    #
+    #  cmp(x, y) = sign(sign(x) * (abs(x) - abs(y)))
+    #            = sign(x) * sign(abs(x) - abs(y))
+    #            = sign(x) * sign(x.c * 10^x.q - y.c * 10^y.q)
+    #
+    # Now, for the latter sign:
+    #
+    #   sign(x.c * 10^x.q - y.c * 10^y.q)
+    # = sign(x.c * 10^(x.q - y.q) - y.c) * 10^y.q
+    # = sign(x.c - y.c * 10^(y.q - x.q)) * 10^x.q
+    #                                      ^^^^^^ positive
+    #
+    # So, we just need to return
+    #
+    #  sign(x) * sign(x.c * 10^(x.q - y.q) - y.c)  if x.q ≥ y.q,
+    #  sign(x) * sign(x.c - y.c * 10^(y.q - x.q))  if x.q < y.q
+    if x.q ≥ y.q
+        q = x.q - y.q
+        return _sign(x) * cmp(x.c * big(10) ^ q, y.c)
     else
-        return farther_from_0
+        q = y.q - x.q
+        return _sign(x) * cmp(x.c, y.c * big(10) ^ q)
     end
 end
 
-function Base.:(<=)(x::Decimal, y::Decimal)
-    return x < y || x == y
-end
+Base.:(==)(x::Decimal, y::Decimal) = iszero(cmp(x, y))
+Base.:(<)(x::Decimal, y::Decimal) = cmp(x, y) < 0
+Base.:(<=)(x::Decimal, y::Decimal) = cmp(x, y) <= 0
 
 # Special case equality with AbstractFloat to allow comparison against Inf/Nan
 # which are not representable in Decimal
diff --git a/test/runtests.jl b/test/runtests.jl
index cce1169..cf0e978 100644
--- a/test/runtests.jl
+++ b/test/runtests.jl
@@ -23,4 +23,6 @@ include("test_hash.jl")
 include("test_norm.jl")
 include("test_round.jl")
 
+include("test_compare.jl")
+
 end
diff --git a/test/test_compare.jl b/test/test_compare.jl
new file mode 100644
index 0000000..ace7c50
--- /dev/null
+++ b/test/test_compare.jl
@@ -0,0 +1,827 @@
+using Decimals
+using Test
+
+@testset "Compare" begin
+    # com001
+    @test cmp(dec"-2", dec"-2") == 0
+    # com002
+    @test cmp(dec"-2", dec"-1") == -1
+    # com003
+    @test cmp(dec"-2", dec"0") == -1
+    # com004
+    @test cmp(dec"-2", dec"1") == -1
+    # com005
+    @test cmp(dec"-2", dec"2") == -1
+    # com006
+    @test cmp(dec"-1", dec"-2") == 1
+    # com007
+    @test cmp(dec"-1", dec"-1") == 0
+    # com008
+    @test cmp(dec"-1", dec"0") == -1
+    # com009
+    @test cmp(dec"-1", dec"1") == -1
+    # com010
+    @test cmp(dec"-1", dec"2") == -1
+    # com011
+    @test cmp(dec"0", dec"-2") == 1
+    # com012
+    @test cmp(dec"0", dec"-1") == 1
+    # com013
+    @test cmp(dec"0", dec"0") == 0
+    # com014
+    @test cmp(dec"0", dec"1") == -1
+    # com015
+    @test cmp(dec"0", dec"2") == -1
+    # com016
+    @test cmp(dec"1", dec"-2") == 1
+    # com017
+    @test cmp(dec"1", dec"-1") == 1
+    # com018
+    @test cmp(dec"1", dec"0") == 1
+    # com019
+    @test cmp(dec"1", dec"1") == 0
+    # com020
+    @test cmp(dec"1", dec"2") == -1
+    # com021
+    @test cmp(dec"2", dec"-2") == 1
+    # com022
+    @test cmp(dec"2", dec"-1") == 1
+    # com023
+    @test cmp(dec"2", dec"0") == 1
+    # com025
+    @test cmp(dec"2", dec"1") == 1
+    # com026
+    @test cmp(dec"2", dec"2") == 0
+    # com031
+    @test cmp(dec"-20", dec"-20") == 0
+    # com032
+    @test cmp(dec"-20", dec"-10") == -1
+    # com033
+    @test cmp(dec"-20", dec"00") == -1
+    # com034
+    @test cmp(dec"-20", dec"10") == -1
+    # com035
+    @test cmp(dec"-20", dec"20") == -1
+    # com036
+    @test cmp(dec"-10", dec"-20") == 1
+    # com037
+    @test cmp(dec"-10", dec"-10") == 0
+    # com038
+    @test cmp(dec"-10", dec"00") == -1
+    # com039
+    @test cmp(dec"-10", dec"10") == -1
+    # com040
+    @test cmp(dec"-10", dec"20") == -1
+    # com041
+    @test cmp(dec"00", dec"-20") == 1
+    # com042
+    @test cmp(dec"00", dec"-10") == 1
+    # com043
+    @test cmp(dec"00", dec"00") == 0
+    # com044
+    @test cmp(dec"00", dec"10") == -1
+    # com045
+    @test cmp(dec"00", dec"20") == -1
+    # com046
+    @test cmp(dec"10", dec"-20") == 1
+    # com047
+    @test cmp(dec"10", dec"-10") == 1
+    # com048
+    @test cmp(dec"10", dec"00") == 1
+    # com049
+    @test cmp(dec"10", dec"10") == 0
+    # com050
+    @test cmp(dec"10", dec"20") == -1
+    # com051
+    @test cmp(dec"20", dec"-20") == 1
+    # com052
+    @test cmp(dec"20", dec"-10") == 1
+    # com053
+    @test cmp(dec"20", dec"00") == 1
+    # com055
+    @test cmp(dec"20", dec"10") == 1
+    # com056
+    @test cmp(dec"20", dec"20") == 0
+    # com061
+    @test cmp(dec"-2.0", dec"-2.0") == 0
+    # com062
+    @test cmp(dec"-2.0", dec"-1.0") == -1
+    # com063
+    @test cmp(dec"-2.0", dec"0.0") == -1
+    # com064
+    @test cmp(dec"-2.0", dec"1.0") == -1
+    # com065
+    @test cmp(dec"-2.0", dec"2.0") == -1
+    # com066
+    @test cmp(dec"-1.0", dec"-2.0") == 1
+    # com067
+    @test cmp(dec"-1.0", dec"-1.0") == 0
+    # com068
+    @test cmp(dec"-1.0", dec"0.0") == -1
+    # com069
+    @test cmp(dec"-1.0", dec"1.0") == -1
+    # com070
+    @test cmp(dec"-1.0", dec"2.0") == -1
+    # com071
+    @test cmp(dec"0.0", dec"-2.0") == 1
+    # com072
+    @test cmp(dec"0.0", dec"-1.0") == 1
+    # com073
+    @test cmp(dec"0.0", dec"0.0") == 0
+    # com074
+    @test cmp(dec"0.0", dec"1.0") == -1
+    # com075
+    @test cmp(dec"0.0", dec"2.0") == -1
+    # com076
+    @test cmp(dec"1.0", dec"-2.0") == 1
+    # com077
+    @test cmp(dec"1.0", dec"-1.0") == 1
+    # com078
+    @test cmp(dec"1.0", dec"0.0") == 1
+    # com079
+    @test cmp(dec"1.0", dec"1.0") == 0
+    # com080
+    @test cmp(dec"1.0", dec"2.0") == -1
+    # com081
+    @test cmp(dec"2.0", dec"-2.0") == 1
+    # com082
+    @test cmp(dec"2.0", dec"-1.0") == 1
+    # com083
+    @test cmp(dec"2.0", dec"0.0") == 1
+    # com085
+    @test cmp(dec"2.0", dec"1.0") == 1
+    # com086
+    @test cmp(dec"2.0", dec"2.0") == 0
+    # com100
+    @test cmp(dec"7.0", dec"7.0") == 0
+    # com101
+    @test cmp(dec"7.0", dec"7") == 0
+    # com102
+    @test cmp(dec"7", dec"7.0") == 0
+    # com103
+    @test cmp(dec"7E+0", dec"7.0") == 0
+    # com104
+    @test cmp(dec"70E-1", dec"7.0") == 0
+    # com105
+    @test cmp(dec"0.7E+1", dec"7") == 0
+    # com106
+    @test cmp(dec"70E-1", dec"7") == 0
+    # com107
+    @test cmp(dec"7.0", dec"7E+0") == 0
+    # com108
+    @test cmp(dec"7.0", dec"70E-1") == 0
+    # com109
+    @test cmp(dec"7", dec"0.7E+1") == 0
+    # com110
+    @test cmp(dec"7", dec"70E-1") == 0
+    # com120
+    @test cmp(dec"8.0", dec"7.0") == 1
+    # com121
+    @test cmp(dec"8.0", dec"7") == 1
+    # com122
+    @test cmp(dec"8", dec"7.0") == 1
+    # com123
+    @test cmp(dec"8E+0", dec"7.0") == 1
+    # com124
+    @test cmp(dec"80E-1", dec"7.0") == 1
+    # com125
+    @test cmp(dec"0.8E+1", dec"7") == 1
+    # com126
+    @test cmp(dec"80E-1", dec"7") == 1
+    # com127
+    @test cmp(dec"8.0", dec"7E+0") == 1
+    # com128
+    @test cmp(dec"8.0", dec"70E-1") == 1
+    # com129
+    @test cmp(dec"8", dec"0.7E+1") == 1
+    # com130
+    @test cmp(dec"8", dec"70E-1") == 1
+    # com140
+    @test cmp(dec"8.0", dec"9.0") == -1
+    # com141
+    @test cmp(dec"8.0", dec"9") == -1
+    # com142
+    @test cmp(dec"8", dec"9.0") == -1
+    # com143
+    @test cmp(dec"8E+0", dec"9.0") == -1
+    # com144
+    @test cmp(dec"80E-1", dec"9.0") == -1
+    # com145
+    @test cmp(dec"0.8E+1", dec"9") == -1
+    # com146
+    @test cmp(dec"80E-1", dec"9") == -1
+    # com147
+    @test cmp(dec"8.0", dec"9E+0") == -1
+    # com148
+    @test cmp(dec"8.0", dec"90E-1") == -1
+    # com149
+    @test cmp(dec"8", dec"0.9E+1") == -1
+    # com150
+    @test cmp(dec"8", dec"90E-1") == -1
+    # com200
+    @test cmp(dec"-7.0", dec"7.0") == -1
+    # com201
+    @test cmp(dec"-7.0", dec"7") == -1
+    # com202
+    @test cmp(dec"-7", dec"7.0") == -1
+    # com203
+    @test cmp(dec"-7E+0", dec"7.0") == -1
+    # com204
+    @test cmp(dec"-70E-1", dec"7.0") == -1
+    # com205
+    @test cmp(dec"-0.7E+1", dec"7") == -1
+    # com206
+    @test cmp(dec"-70E-1", dec"7") == -1
+    # com207
+    @test cmp(dec"-7.0", dec"7E+0") == -1
+    # com208
+    @test cmp(dec"-7.0", dec"70E-1") == -1
+    # com209
+    @test cmp(dec"-7", dec"0.7E+1") == -1
+    # com210
+    @test cmp(dec"-7", dec"70E-1") == -1
+    # com220
+    @test cmp(dec"-8.0", dec"7.0") == -1
+    # com221
+    @test cmp(dec"-8.0", dec"7") == -1
+    # com222
+    @test cmp(dec"-8", dec"7.0") == -1
+    # com223
+    @test cmp(dec"-8E+0", dec"7.0") == -1
+    # com224
+    @test cmp(dec"-80E-1", dec"7.0") == -1
+    # com225
+    @test cmp(dec"-0.8E+1", dec"7") == -1
+    # com226
+    @test cmp(dec"-80E-1", dec"7") == -1
+    # com227
+    @test cmp(dec"-8.0", dec"7E+0") == -1
+    # com228
+    @test cmp(dec"-8.0", dec"70E-1") == -1
+    # com229
+    @test cmp(dec"-8", dec"0.7E+1") == -1
+    # com230
+    @test cmp(dec"-8", dec"70E-1") == -1
+    # com240
+    @test cmp(dec"-8.0", dec"9.0") == -1
+    # com241
+    @test cmp(dec"-8.0", dec"9") == -1
+    # com242
+    @test cmp(dec"-8", dec"9.0") == -1
+    # com243
+    @test cmp(dec"-8E+0", dec"9.0") == -1
+    # com244
+    @test cmp(dec"-80E-1", dec"9.0") == -1
+    # com245
+    @test cmp(dec"-0.8E+1", dec"9") == -1
+    # com246
+    @test cmp(dec"-80E-1", dec"9") == -1
+    # com247
+    @test cmp(dec"-8.0", dec"9E+0") == -1
+    # com248
+    @test cmp(dec"-8.0", dec"90E-1") == -1
+    # com249
+    @test cmp(dec"-8", dec"0.9E+1") == -1
+    # com250
+    @test cmp(dec"-8", dec"90E-1") == -1
+    # com300
+    @test cmp(dec"7.0", dec"-7.0") == 1
+    # com301
+    @test cmp(dec"7.0", dec"-7") == 1
+    # com302
+    @test cmp(dec"7", dec"-7.0") == 1
+    # com303
+    @test cmp(dec"7E+0", dec"-7.0") == 1
+    # com304
+    @test cmp(dec"70E-1", dec"-7.0") == 1
+    # com305
+    @test cmp(dec".7E+1", dec"-7") == 1
+    # com306
+    @test cmp(dec"70E-1", dec"-7") == 1
+    # com307
+    @test cmp(dec"7.0", dec"-7E+0") == 1
+    # com308
+    @test cmp(dec"7.0", dec"-70E-1") == 1
+    # com309
+    @test cmp(dec"7", dec"-.7E+1") == 1
+    # com310
+    @test cmp(dec"7", dec"-70E-1") == 1
+    # com320
+    @test cmp(dec"8.0", dec"-7.0") == 1
+    # com321
+    @test cmp(dec"8.0", dec"-7") == 1
+    # com322
+    @test cmp(dec"8", dec"-7.0") == 1
+    # com323
+    @test cmp(dec"8E+0", dec"-7.0") == 1
+    # com324
+    @test cmp(dec"80E-1", dec"-7.0") == 1
+    # com325
+    @test cmp(dec".8E+1", dec"-7") == 1
+    # com326
+    @test cmp(dec"80E-1", dec"-7") == 1
+    # com327
+    @test cmp(dec"8.0", dec"-7E+0") == 1
+    # com328
+    @test cmp(dec"8.0", dec"-70E-1") == 1
+    # com329
+    @test cmp(dec"8", dec"-.7E+1") == 1
+    # com330
+    @test cmp(dec"8", dec"-70E-1") == 1
+    # com340
+    @test cmp(dec"8.0", dec"-9.0") == 1
+    # com341
+    @test cmp(dec"8.0", dec"-9") == 1
+    # com342
+    @test cmp(dec"8", dec"-9.0") == 1
+    # com343
+    @test cmp(dec"8E+0", dec"-9.0") == 1
+    # com344
+    @test cmp(dec"80E-1", dec"-9.0") == 1
+    # com345
+    @test cmp(dec".8E+1", dec"-9") == 1
+    # com346
+    @test cmp(dec"80E-1", dec"-9") == 1
+    # com347
+    @test cmp(dec"8.0", dec"-9E+0") == 1
+    # com348
+    @test cmp(dec"8.0", dec"-90E-1") == 1
+    # com349
+    @test cmp(dec"8", dec"-.9E+1") == 1
+    # com350
+    @test cmp(dec"8", dec"-90E-1") == 1
+    # com400
+    @test cmp(dec"-7.0", dec"-7.0") == 0
+    # com401
+    @test cmp(dec"-7.0", dec"-7") == 0
+    # com402
+    @test cmp(dec"-7", dec"-7.0") == 0
+    # com403
+    @test cmp(dec"-7E+0", dec"-7.0") == 0
+    # com404
+    @test cmp(dec"-70E-1", dec"-7.0") == 0
+    # com405
+    @test cmp(dec"-.7E+1", dec"-7") == 0
+    # com406
+    @test cmp(dec"-70E-1", dec"-7") == 0
+    # com407
+    @test cmp(dec"-7.0", dec"-7E+0") == 0
+    # com408
+    @test cmp(dec"-7.0", dec"-70E-1") == 0
+    # com409
+    @test cmp(dec"-7", dec"-.7E+1") == 0
+    # com410
+    @test cmp(dec"-7", dec"-70E-1") == 0
+    # com420
+    @test cmp(dec"-8.0", dec"-7.0") == -1
+    # com421
+    @test cmp(dec"-8.0", dec"-7") == -1
+    # com422
+    @test cmp(dec"-8", dec"-7.0") == -1
+    # com423
+    @test cmp(dec"-8E+0", dec"-7.0") == -1
+    # com424
+    @test cmp(dec"-80E-1", dec"-7.0") == -1
+    # com425
+    @test cmp(dec"-.8E+1", dec"-7") == -1
+    # com426
+    @test cmp(dec"-80E-1", dec"-7") == -1
+    # com427
+    @test cmp(dec"-8.0", dec"-7E+0") == -1
+    # com428
+    @test cmp(dec"-8.0", dec"-70E-1") == -1
+    # com429
+    @test cmp(dec"-8", dec"-.7E+1") == -1
+    # com430
+    @test cmp(dec"-8", dec"-70E-1") == -1
+    # com440
+    @test cmp(dec"-8.0", dec"-9.0") == 1
+    # com441
+    @test cmp(dec"-8.0", dec"-9") == 1
+    # com442
+    @test cmp(dec"-8", dec"-9.0") == 1
+    # com443
+    @test cmp(dec"-8E+0", dec"-9.0") == 1
+    # com444
+    @test cmp(dec"-80E-1", dec"-9.0") == 1
+    # com445
+    @test cmp(dec"-.8E+1", dec"-9") == 1
+    # com446
+    @test cmp(dec"-80E-1", dec"-9") == 1
+    # com447
+    @test cmp(dec"-8.0", dec"-9E+0") == 1
+    # com448
+    @test cmp(dec"-8.0", dec"-90E-1") == 1
+    # com449
+    @test cmp(dec"-8", dec"-.9E+1") == 1
+    # com450
+    @test cmp(dec"-8", dec"-90E-1") == 1
+    # com460
+    @test cmp(dec"9.99999999E+999999999", dec"9.99999999E+999999999") == 0
+    # com461
+    @test cmp(dec"-9.99999999E+999999999", dec"9.99999999E+999999999") == -1
+    # com462
+    @test cmp(dec"9.99999999E+999999999", dec"-9.99999999E+999999999") == 1
+    # com463
+    @test cmp(dec"-9.99999999E+999999999", dec"-9.99999999E+999999999") == 0
+    # com470
+    @test cmp(dec"123.4560000000000000E789", dec"123.456E789") == 0
+    # com471
+    @test cmp(dec"123.456000000000000E-89", dec"123.456E-89") == 0
+    # com472
+    @test cmp(dec"123.45600000000000E789", dec"123.456E789") == 0
+    # com473
+    @test cmp(dec"123.4560000000000E-89", dec"123.456E-89") == 0
+    # com474
+    @test cmp(dec"123.456000000000E789", dec"123.456E789") == 0
+    # com475
+    @test cmp(dec"123.45600000000E-89", dec"123.456E-89") == 0
+    # com476
+    @test cmp(dec"123.4560000000E789", dec"123.456E789") == 0
+    # com477
+    @test cmp(dec"123.456000000E-89", dec"123.456E-89") == 0
+    # com478
+    @test cmp(dec"123.45600000E789", dec"123.456E789") == 0
+    # com479
+    @test cmp(dec"123.4560000E-89", dec"123.456E-89") == 0
+    # com480
+    @test cmp(dec"123.456000E789", dec"123.456E789") == 0
+    # com481
+    @test cmp(dec"123.45600E-89", dec"123.456E-89") == 0
+    # com482
+    @test cmp(dec"123.4560E789", dec"123.456E789") == 0
+    # com483
+    @test cmp(dec"123.456E-89", dec"123.456E-89") == 0
+    # com484
+    @test cmp(dec"123.456E-89", dec"123.4560000000000000E-89") == 0
+    # com485
+    @test cmp(dec"123.456E789", dec"123.456000000000000E789") == 0
+    # com486
+    @test cmp(dec"123.456E-89", dec"123.45600000000000E-89") == 0
+    # com487
+    @test cmp(dec"123.456E789", dec"123.4560000000000E789") == 0
+    # com488
+    @test cmp(dec"123.456E-89", dec"123.456000000000E-89") == 0
+    # com489
+    @test cmp(dec"123.456E789", dec"123.45600000000E789") == 0
+    # com490
+    @test cmp(dec"123.456E-89", dec"123.4560000000E-89") == 0
+    # com491
+    @test cmp(dec"123.456E789", dec"123.456000000E789") == 0
+    # com492
+    @test cmp(dec"123.456E-89", dec"123.45600000E-89") == 0
+    # com493
+    @test cmp(dec"123.456E789", dec"123.4560000E789") == 0
+    # com494
+    @test cmp(dec"123.456E-89", dec"123.456000E-89") == 0
+    # com495
+    @test cmp(dec"123.456E789", dec"123.45600E789") == 0
+    # com496
+    @test cmp(dec"123.456E-89", dec"123.4560E-89") == 0
+    # com497
+    @test cmp(dec"123.456E789", dec"123.456E789") == 0
+    # com500
+    @test cmp(dec"1", dec"1E-15") == 1
+    # com501
+    @test cmp(dec"1", dec"1E-14") == 1
+    # com502
+    @test cmp(dec"1", dec"1E-13") == 1
+    # com503
+    @test cmp(dec"1", dec"1E-12") == 1
+    # com504
+    @test cmp(dec"1", dec"1E-11") == 1
+    # com505
+    @test cmp(dec"1", dec"1E-10") == 1
+    # com506
+    @test cmp(dec"1", dec"1E-9") == 1
+    # com507
+    @test cmp(dec"1", dec"1E-8") == 1
+    # com508
+    @test cmp(dec"1", dec"1E-7") == 1
+    # com509
+    @test cmp(dec"1", dec"1E-6") == 1
+    # com510
+    @test cmp(dec"1", dec"1E-5") == 1
+    # com511
+    @test cmp(dec"1", dec"1E-4") == 1
+    # com512
+    @test cmp(dec"1", dec"1E-3") == 1
+    # com513
+    @test cmp(dec"1", dec"1E-2") == 1
+    # com514
+    @test cmp(dec"1", dec"1E-1") == 1
+    # com515
+    @test cmp(dec"1", dec"1E-0") == 0
+    # com516
+    @test cmp(dec"1", dec"1E+1") == -1
+    # com517
+    @test cmp(dec"1", dec"1E+2") == -1
+    # com518
+    @test cmp(dec"1", dec"1E+3") == -1
+    # com519
+    @test cmp(dec"1", dec"1E+4") == -1
+    # com521
+    @test cmp(dec"1", dec"1E+5") == -1
+    # com522
+    @test cmp(dec"1", dec"1E+6") == -1
+    # com523
+    @test cmp(dec"1", dec"1E+7") == -1
+    # com524
+    @test cmp(dec"1", dec"1E+8") == -1
+    # com525
+    @test cmp(dec"1", dec"1E+9") == -1
+    # com526
+    @test cmp(dec"1", dec"1E+10") == -1
+    # com527
+    @test cmp(dec"1", dec"1E+11") == -1
+    # com528
+    @test cmp(dec"1", dec"1E+12") == -1
+    # com529
+    @test cmp(dec"1", dec"1E+13") == -1
+    # com530
+    @test cmp(dec"1", dec"1E+14") == -1
+    # com531
+    @test cmp(dec"1", dec"1E+15") == -1
+    # com540
+    @test cmp(dec"1E-15", dec"1") == -1
+    # com541
+    @test cmp(dec"1E-14", dec"1") == -1
+    # com542
+    @test cmp(dec"1E-13", dec"1") == -1
+    # com543
+    @test cmp(dec"1E-12", dec"1") == -1
+    # com544
+    @test cmp(dec"1E-11", dec"1") == -1
+    # com545
+    @test cmp(dec"1E-10", dec"1") == -1
+    # com546
+    @test cmp(dec"1E-9", dec"1") == -1
+    # com547
+    @test cmp(dec"1E-8", dec"1") == -1
+    # com548
+    @test cmp(dec"1E-7", dec"1") == -1
+    # com549
+    @test cmp(dec"1E-6", dec"1") == -1
+    # com550
+    @test cmp(dec"1E-5", dec"1") == -1
+    # com551
+    @test cmp(dec"1E-4", dec"1") == -1
+    # com552
+    @test cmp(dec"1E-3", dec"1") == -1
+    # com553
+    @test cmp(dec"1E-2", dec"1") == -1
+    # com554
+    @test cmp(dec"1E-1", dec"1") == -1
+    # com555
+    @test cmp(dec"1E-0", dec"1") == 0
+    # com556
+    @test cmp(dec"1E+1", dec"1") == 1
+    # com557
+    @test cmp(dec"1E+2", dec"1") == 1
+    # com558
+    @test cmp(dec"1E+3", dec"1") == 1
+    # com559
+    @test cmp(dec"1E+4", dec"1") == 1
+    # com561
+    @test cmp(dec"1E+5", dec"1") == 1
+    # com562
+    @test cmp(dec"1E+6", dec"1") == 1
+    # com563
+    @test cmp(dec"1E+7", dec"1") == 1
+    # com564
+    @test cmp(dec"1E+8", dec"1") == 1
+    # com565
+    @test cmp(dec"1E+9", dec"1") == 1
+    # com566
+    @test cmp(dec"1E+10", dec"1") == 1
+    # com567
+    @test cmp(dec"1E+11", dec"1") == 1
+    # com568
+    @test cmp(dec"1E+12", dec"1") == 1
+    # com569
+    @test cmp(dec"1E+13", dec"1") == 1
+    # com570
+    @test cmp(dec"1E+14", dec"1") == 1
+    # com571
+    @test cmp(dec"1E+15", dec"1") == 1
+    # com580
+    @test cmp(dec"0.000000987654321", dec"1E-15") == 1
+    # com581
+    @test cmp(dec"0.000000987654321", dec"1E-14") == 1
+    # com582
+    @test cmp(dec"0.000000987654321", dec"1E-13") == 1
+    # com583
+    @test cmp(dec"0.000000987654321", dec"1E-12") == 1
+    # com584
+    @test cmp(dec"0.000000987654321", dec"1E-11") == 1
+    # com585
+    @test cmp(dec"0.000000987654321", dec"1E-10") == 1
+    # com586
+    @test cmp(dec"0.000000987654321", dec"1E-9") == 1
+    # com587
+    @test cmp(dec"0.000000987654321", dec"1E-8") == 1
+    # com588
+    @test cmp(dec"0.000000987654321", dec"1E-7") == 1
+    # com589
+    @test cmp(dec"0.000000987654321", dec"1E-6") == -1
+    # com590
+    @test cmp(dec"0.000000987654321", dec"1E-5") == -1
+    # com591
+    @test cmp(dec"0.000000987654321", dec"1E-4") == -1
+    # com592
+    @test cmp(dec"0.000000987654321", dec"1E-3") == -1
+    # com593
+    @test cmp(dec"0.000000987654321", dec"1E-2") == -1
+    # com594
+    @test cmp(dec"0.000000987654321", dec"1E-1") == -1
+    # com595
+    @test cmp(dec"0.000000987654321", dec"1E-0") == -1
+    # com596
+    @test cmp(dec"0.000000987654321", dec"1E+1") == -1
+    # com597
+    @test cmp(dec"0.000000987654321", dec"1E+2") == -1
+    # com598
+    @test cmp(dec"0.000000987654321", dec"1E+3") == -1
+    # com599
+    @test cmp(dec"0.000000987654321", dec"1E+4") == -1
+    # com600
+    @test cmp(dec"12", dec"12.2345") == -1
+    # com601
+    @test cmp(dec"12.0", dec"12.2345") == -1
+    # com602
+    @test cmp(dec"12.00", dec"12.2345") == -1
+    # com603
+    @test cmp(dec"12.000", dec"12.2345") == -1
+    # com604
+    @test cmp(dec"12.0000", dec"12.2345") == -1
+    # com605
+    @test cmp(dec"12.00000", dec"12.2345") == -1
+    # com606
+    @test cmp(dec"12.000000", dec"12.2345") == -1
+    # com607
+    @test cmp(dec"12.0000000", dec"12.2345") == -1
+    # com608
+    @test cmp(dec"12.00000000", dec"12.2345") == -1
+    # com609
+    @test cmp(dec"12.000000000", dec"12.2345") == -1
+    # com610
+    @test cmp(dec"12.1234", dec"12") == 1
+    # com611
+    @test cmp(dec"12.1234", dec"12.0") == 1
+    # com612
+    @test cmp(dec"12.1234", dec"12.00") == 1
+    # com613
+    @test cmp(dec"12.1234", dec"12.000") == 1
+    # com614
+    @test cmp(dec"12.1234", dec"12.0000") == 1
+    # com615
+    @test cmp(dec"12.1234", dec"12.00000") == 1
+    # com616
+    @test cmp(dec"12.1234", dec"12.000000") == 1
+    # com617
+    @test cmp(dec"12.1234", dec"12.0000000") == 1
+    # com618
+    @test cmp(dec"12.1234", dec"12.00000000") == 1
+    # com619
+    @test cmp(dec"12.1234", dec"12.000000000") == 1
+    # com620
+    @test cmp(dec"-12", dec"-12.2345") == 1
+    # com621
+    @test cmp(dec"-12.0", dec"-12.2345") == 1
+    # com622
+    @test cmp(dec"-12.00", dec"-12.2345") == 1
+    # com623
+    @test cmp(dec"-12.000", dec"-12.2345") == 1
+    # com624
+    @test cmp(dec"-12.0000", dec"-12.2345") == 1
+    # com625
+    @test cmp(dec"-12.00000", dec"-12.2345") == 1
+    # com626
+    @test cmp(dec"-12.000000", dec"-12.2345") == 1
+    # com627
+    @test cmp(dec"-12.0000000", dec"-12.2345") == 1
+    # com628
+    @test cmp(dec"-12.00000000", dec"-12.2345") == 1
+    # com629
+    @test cmp(dec"-12.000000000", dec"-12.2345") == 1
+    # com630
+    @test cmp(dec"-12.1234", dec"-12") == -1
+    # com631
+    @test cmp(dec"-12.1234", dec"-12.0") == -1
+    # com632
+    @test cmp(dec"-12.1234", dec"-12.00") == -1
+    # com633
+    @test cmp(dec"-12.1234", dec"-12.000") == -1
+    # com634
+    @test cmp(dec"-12.1234", dec"-12.0000") == -1
+    # com635
+    @test cmp(dec"-12.1234", dec"-12.00000") == -1
+    # com636
+    @test cmp(dec"-12.1234", dec"-12.000000") == -1
+    # com637
+    @test cmp(dec"-12.1234", dec"-12.0000000") == -1
+    # com638
+    @test cmp(dec"-12.1234", dec"-12.00000000") == -1
+    # com639
+    @test cmp(dec"-12.1234", dec"-12.000000000") == -1
+    # com680
+    @test cmp(dec"12", dec"12") == 0
+    # com681
+    @test cmp(dec"12", dec"12.0") == 0
+    # com682
+    @test cmp(dec"12", dec"12.00") == 0
+    # com683
+    @test cmp(dec"12", dec"12.000") == 0
+    # com684
+    @test cmp(dec"12", dec"12.0000") == 0
+    # com685
+    @test cmp(dec"12", dec"12.00000") == 0
+    # com686
+    @test cmp(dec"12", dec"12.000000") == 0
+    # com687
+    @test cmp(dec"12", dec"12.0000000") == 0
+    # com688
+    @test cmp(dec"12", dec"12.00000000") == 0
+    # com689
+    @test cmp(dec"12", dec"12.000000000") == 0
+    # com690
+    @test cmp(dec"12", dec"12") == 0
+    # com691
+    @test cmp(dec"12.0", dec"12") == 0
+    # com692
+    @test cmp(dec"12.00", dec"12") == 0
+    # com693
+    @test cmp(dec"12.000", dec"12") == 0
+    # com694
+    @test cmp(dec"12.0000", dec"12") == 0
+    # com695
+    @test cmp(dec"12.00000", dec"12") == 0
+    # com696
+    @test cmp(dec"12.000000", dec"12") == 0
+    # com697
+    @test cmp(dec"12.0000000", dec"12") == 0
+    # com698
+    @test cmp(dec"12.00000000", dec"12") == 0
+    # com699
+    @test cmp(dec"12.000000000", dec"12") == 0
+    # com701
+    @test cmp(dec"12345678000", dec"1") == 1
+    # com702
+    @test cmp(dec"1", dec"12345678000") == -1
+    # com703
+    @test cmp(dec"1234567800", dec"1") == 1
+    # com704
+    @test cmp(dec"1", dec"1234567800") == -1
+    # com705
+    @test cmp(dec"1234567890", dec"1") == 1
+    # com706
+    @test cmp(dec"1", dec"1234567890") == -1
+    # com707
+    @test cmp(dec"1234567891", dec"1") == 1
+    # com708
+    @test cmp(dec"1", dec"1234567891") == -1
+    # com709
+    @test cmp(dec"12345678901", dec"1") == 1
+    # com710
+    @test cmp(dec"1", dec"12345678901") == -1
+    # com711
+    @test cmp(dec"1234567896", dec"1") == 1
+    # com712
+    @test cmp(dec"1", dec"1234567896") == -1
+    # com713
+    @test cmp(dec"-1234567891", dec"1") == -1
+    # com714
+    @test cmp(dec"1", dec"-1234567891") == 1
+    # com715
+    @test cmp(dec"-12345678901", dec"1") == -1
+    # com716
+    @test cmp(dec"1", dec"-12345678901") == 1
+    # com717
+    @test cmp(dec"-1234567896", dec"1") == -1
+    # com718
+    @test cmp(dec"1", dec"-1234567896") == 1
+    # com741
+    @test cmp(dec"12345678000", dec"1") == 1
+    # com742
+    @test cmp(dec"1", dec"12345678000") == -1
+    # com743
+    @test cmp(dec"1234567800", dec"1") == 1
+    # com744
+    @test cmp(dec"1", dec"1234567800") == -1
+    # com745
+    @test cmp(dec"1234567890", dec"1") == 1
+    # com746
+    @test cmp(dec"1", dec"1234567890") == -1
+    # com747
+    @test cmp(dec"1234567891", dec"1") == 1
+    # com748
+    @test cmp(dec"1", dec"1234567891") == -1
+    # com749
+    @test cmp(dec"12345678901", dec"1") == 1
+    # com750
+    @test cmp(dec"1", dec"12345678901") == -1
+    # com751
+    @test cmp(dec"1234567896", dec"1") == 1
+    # com752
+    @test cmp(dec"1", dec"1234567896") == -1
+end