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Diffstat (limited to 'gcc/testsuite/ada/acats/tests/c4/c490001.a')
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diff --git a/gcc/testsuite/ada/acats/tests/c4/c490001.a b/gcc/testsuite/ada/acats/tests/c4/c490001.a deleted file mode 100644 index 19153504cb0..00000000000 --- a/gcc/testsuite/ada/acats/tests/c4/c490001.a +++ /dev/null @@ -1,215 +0,0 @@ --- C490001.A --- --- Grant of Unlimited Rights --- --- Under contracts F33600-87-D-0337, F33600-84-D-0280, MDA903-79-C-0687, --- F08630-91-C-0015, and DCA100-97-D-0025, the U.S. Government obtained --- unlimited rights in the software and documentation contained herein. --- Unlimited rights are defined in DFAR 252.227-7013(a)(19). By making --- this public release, the Government intends to confer upon all --- recipients unlimited rights equal to those held by the Government. --- These rights include rights to use, duplicate, release or disclose the --- released technical data and computer software in whole or in part, in --- any manner and for any purpose whatsoever, and to have or permit others --- to do so. --- --- DISCLAIMER --- --- ALL MATERIALS OR INFORMATION HEREIN RELEASED, MADE AVAILABLE OR --- DISCLOSED ARE AS IS. THE GOVERNMENT MAKES NO EXPRESS OR IMPLIED --- WARRANTY AS TO ANY MATTER WHATSOEVER, INCLUDING THE CONDITIONS OF THE --- SOFTWARE, DOCUMENTATION OR OTHER INFORMATION RELEASED, MADE AVAILABLE --- OR DISCLOSED, OR THE OWNERSHIP, MERCHANTABILITY, OR FITNESS FOR A --- PARTICULAR PURPOSE OF SAID MATERIAL. ---* --- --- OBJECTIVE: --- Check that, for a real static expression that is not part of a larger --- static expression, and whose expected type T is a floating point type --- that is not a descendant of a formal scalar type, the value is rounded --- to the nearest machine number of T if T'Machine_Rounds is true, and is --- truncated otherwise. Check that if rounding is performed, and the value --- is exactly halfway between two machine numbers, one of the two machine --- numbers is used. --- --- TEST DESCRIPTION: --- The test obtains a machine number M1 for a floating point subtype S by --- passing a real literal to S'Machine. It then obtains an adjacent --- machine number M2 by using S'Succ (or S'Pred). It then constructs --- values which lie between these two machine numbers: one (A) which is --- closer to M1, one (B) which is exactly halfway between M1 and M2, and --- one (C) which is closer to M2. This is done for both positive and --- negative machine numbers. --- --- Let M1 be closer to zero than M2. Then if S'Machine_Rounds is true, --- C must be rounded to M2, A must be rounded to M1, and B must be rounded --- to either M1 or M2. If S'Machine_Rounds is false, all the values must --- be truncated to M1. --- --- A, B, and C are constructed using the following static expressions: --- --- A: constant S := M1 + (M2 - M1)*Z; -- Z slightly less than 0.5. --- B: constant S := M1 + (M2 - M1)*Z; -- Z equals 0.5. --- C: constant S := M1 + (M2 - M1)*Z; -- Z slightly more than 0.5. --- --- Since these are static expressions, they must be evaluated exactly, --- and no rounding may occur until the final result is calculated. --- --- The checks for equality between the members of (A, B, C) and (M1, M2) --- are performed at run-time within the body of a subprogram. --- --- The test performs additional checks that the rounding performed on --- real literals is consistent for a floating point subtype. A literal is --- assigned to a constant of a floating point subtype S. The same literal --- is then passed to a subprogram, along with the constant, and an --- equality check is performed within the body of the subprogram. --- --- --- CHANGE HISTORY: --- 25 Sep 95 SAIC Initial prerelease version. --- 25 May 01 RLB Repaired to work with the repeal of the round away --- rule by AI-268. --- ---! - -with System; -package C490001_0 is - - type My_Flt is digits System.Max_Digits; - - procedure Float_Subtest (A, B: in My_Flt; Msg: in String); - - procedure Float_Subtest (A, B, C: in My_Flt; Msg: in String); - - --- --- Positive cases: --- - - -- |----|-------------|-----------------|-------------------|-----------| - -- | | | | | | - -- 0 P_M1 Less_Pos_Than_Half Pos_Exactly_Half More_Pos_Than_Half P_M2 - - - Positive_Float : constant My_Flt := 12.440193950021943; - - -- The literal value 12.440193950021943 is rounded up or down to the - -- nearest machine number of My_Flt when Positive_Float is initialized. - -- The value of Positive_Float should therefore be a machine number, and - -- the use of 'Machine in the initialization of P_M1 will be redundant for - -- a correct implementation. It's done anyway to make certain that P_M1 is - -- a machine number, independent of whether an implementation correctly - -- performs rounding. - - P_M1 : constant My_Flt := My_Flt'Machine(Positive_Float); - P_M2 : constant My_Flt := My_Flt'Succ(P_M1); - - -- P_M1 and P_M2 are adjacent machine numbers. Note that because it is not - -- certain whether 12.440193950021943 is a machine number, nor whether - -- 'Machine rounds it up or down, 12.440193950021943 may not lie between - -- P_M1 and P_M2. The test does not depend on this information, however; - -- the literal is only used as a "seed" to obtain the machine numbers. - - - -- The following entities are used to verify that rounding is performed - -- according to the value of 'Machine_Rounds. If language rules are - -- obeyed, the intermediate expressions in the following static - -- initialization expressions will not be rounded; all calculations will - -- be performed exactly. The final result, however, will be rounded to - -- a machine number (either P_M1 or P_M2, depending on the value of - -- My_Flt'Machine_Rounds). Thus, the value of each constant below will - -- equal that of P_M1 or P_M2. - - Less_Pos_Than_Half : constant My_Flt := P_M1 + ((P_M2 - P_M1)*2.9/6.0); - Pos_Exactly_Half : constant My_Flt := P_M1 + ((P_M2 - P_M1)/2.0); - More_Pos_Than_Half : constant My_Flt := P_M1 + ((P_M2 - P_M1)*4.6/9.0); - - --- --- Negative cases: --- - - -- -|-------------|-----------------|-------------------|-----------|----| - -- | | | | | | - -- N_M2 More_Neg_Than_Half Neg_Exactly_Half Less_Neg_Than_Half N_M1 0 - - - -- The descriptions for the positive cases above apply to the negative - -- cases below as well. Note that, for N_M2, 'Pred is used rather than - -- 'Succ. Thus, N_M2 is further from 0.0 (i.e. more negative) than N_M1. - - Negative_Float : constant My_Flt := -0.692074550952117; - - - N_M1 : constant My_Flt := My_Flt'Machine(Negative_Float); - N_M2 : constant My_Flt := My_Flt'Pred(N_M1); - - More_Neg_Than_Half : constant My_Flt := N_M1 + ((N_M2 - N_M1)*4.1/8.0); - Neg_Exactly_Half : constant My_Flt := N_M1 + ((N_M2 - N_M1)/2.0); - Less_Neg_Than_Half : constant My_Flt := N_M1 + ((N_M2 - N_M1)*2.4/5.0); - -end C490001_0; - - - --==================================================================-- - - -with TCTouch; -package body C490001_0 is - - procedure Float_Subtest (A, B: in My_Flt; Msg: in String) is - begin - TCTouch.Assert (A = B, Msg); - end Float_Subtest; - - procedure Float_Subtest (A, B, C: in My_Flt; Msg: in String) is - begin - TCTouch.Assert (A = B or A = C, Msg); - end Float_Subtest; - -end C490001_0; - - - --==================================================================-- - - -with C490001_0; -- Floating point support. -use C490001_0; - -with Report; -procedure C490001 is -begin - Report.Test ("C490001", "Rounding of real static expressions: " & - "floating point subtypes"); - - - -- Check that rounding direction is consistent for literals: - - Float_Subtest (12.440193950021943, P_M1, "Positive Float: literal"); - Float_Subtest (-0.692074550952117, N_M1, "Negative Float: literal"); - - - -- Now check that rounding is performed correctly for values between - -- machine numbers, according to the value of 'Machine_Rounds: - - if My_Flt'Machine_Rounds then - Float_Subtest (Pos_Exactly_Half, P_M1, P_M2, "Positive Float: = half"); - Float_Subtest (More_Pos_Than_Half, P_M2, "Positive Float: > half"); - Float_Subtest (Less_Pos_Than_Half, P_M1, "Positive Float: < half"); - - Float_Subtest (Neg_Exactly_Half, N_M1, N_M2, "Negative Float: = half"); - Float_Subtest (More_Neg_Than_Half, N_M2, "Negative Float: > half"); - Float_Subtest (Less_Neg_Than_Half, N_M1, "Negative Float: < half"); - else - Float_Subtest (Pos_Exactly_Half, P_M1, "Positive Float: = half"); - Float_Subtest (More_Pos_Than_Half, P_M1, "Positive Float: > half"); - Float_Subtest (Less_Pos_Than_Half, P_M1, "Positive Float: < half"); - - Float_Subtest (Neg_Exactly_Half, N_M1, "Negative Float: = half"); - Float_Subtest (More_Neg_Than_Half, N_M1, "Negative Float: > half"); - Float_Subtest (Less_Neg_Than_Half, N_M1, "Negative Float: < half"); - end if; - - - Report.Result; -end C490001; |