trunc: Implement result sign according to IEEE 754.

[gnulib.git] / ChangeLog

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 2010-12-22  Bruno Haible  <bruno@clisp.org>
 
+       trunc: Implement result sign according to IEEE 754.
+       * lib/trunc.c (MIN, MINUS_ZERO): New macros.
+       (FUNC): Return +0.0 for 0 < x < 1 and -0.0 for -1 < x < 0.
+       * tests/test-trunc2.c: Include minus-zero.h.
+       (MINUS_ZERO): New macro.
+       (trunc_reference): Keep in sync with lib/trunc.c.
+       * tests/test-truncf2.c: Include minus-zero.h.
+       (MINUS_ZERO): New macro.
+       (truncf_reference): Keep in sync with lib/trunc.c.
+       * tests/test-truncf-ieee.c (main): Test also values between -1 and 1.
+       * tests/test-trunc-ieee.c (main): Likewise.
+       * tests/test-truncl-ieee.c (main): Likewise.
+
        ceil: Implement result sign according to IEEE 754.
        * lib/ceil.c (MIN, MINUS_ZERO): New macros.
        (FUNC): Return -0.0 for -1 < x < 0.