mirror of git://sourceware.org/git/glibc.git
Avoid "inexact" exceptions in i386/x86_64 trunc functions (bug 15479).
As discussed in <https://sourceware.org/ml/libc-alpha/2016-05/msg00577.html>, TS 18661-1 disallows ceil, floor, round and trunc functions from raising the "inexact" exception, in accordance with general IEEE 754 semantics for when that exception is raised. Fixing this for x87 floating point is more complicated than for the other versions of these functions, because they use the frndint instruction that raises "inexact" and this can only be avoided by saving and restoring the whole floating-point environment. As I noted in <https://sourceware.org/ml/libc-alpha/2016-06/msg00128.html>, I have now implemented a GCC option -fno-fp-int-builtin-inexact for GCC 7, such that GCC will inline these functions on x86, without caring about "inexact", when the default -ffp-int-builtin-inexact is in effect. This allows users to get optimized code depending on the options they pass to the compiler, while making the out-of-line functions follow TS 18661-1 semantics and avoid "inexact". This patch duly fixes the out-of-line trunc function implementations to avoid "inexact", in the same way as the nearbyint implementations. I do not know how the performance of implementations such as these based on saving the environment and changing the rounding mode temporarily compares to that of the C versions or SSE 4.1 versions (of course, for 32-bit x86 SSE implementations still need to get the return value in an x87 register); it's entirely possible other implementations could be faster in some cases. Tested for x86_64 and x86. [BZ #15479] * sysdeps/i386/fpu/s_trunc.S (__trunc): Save and restore floating-point environment rather than just control word. * sysdeps/i386/fpu/s_truncf.S (__truncf): Likewise. * sysdeps/i386/fpu/s_truncl.S (__truncl): Save and restore floating-point environment, with "invalid" exceptions merged in, rather than just control word. * sysdeps/x86_64/fpu/s_truncl.S (__truncl): Likewise. * math/libm-test.inc (trunc_test_data): Do not allow spurious "inexact" exceptions.
This commit is contained in:
Joseph Myers
parent
623629de06
commit
30dcf959d2
11
ChangeLog
11
ChangeLog
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@ -1,5 +1,16 @@
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2016-06-27 Joseph Myers <joseph@codesourcery.com>
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[BZ #15479]
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* sysdeps/i386/fpu/s_trunc.S (__trunc): Save and restore
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floating-point environment rather than just control word.
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* sysdeps/i386/fpu/s_truncf.S (__truncf): Likewise.
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* sysdeps/i386/fpu/s_truncl.S (__truncl): Save and restore
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floating-point environment, with "invalid" exceptions merged in,
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rather than just control word.
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* sysdeps/x86_64/fpu/s_truncl.S (__truncl): Likewise.
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* math/libm-test.inc (trunc_test_data): Do not allow spurious
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"inexact" exceptions.
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[BZ #15479]
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* sysdeps/i386/fpu/s_floor.S (__floor): Save and restore
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floating-point environment rather than just control word.
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@ -12112,9 +12112,8 @@ static const struct test_f_f_data trunc_test_data[] =
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TEST_f_f (trunc, 0, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, minus_zero, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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/* Bug 15479: spurious "inexact" exception may occur. */
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TEST_f_f (trunc, min_subnorm_value, 0.0, ERRNO_UNCHANGED),
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TEST_f_f (trunc, min_value, 0.0, ERRNO_UNCHANGED),
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TEST_f_f (trunc, min_subnorm_value, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, min_value, 0.0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 1, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 2, 2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0x1p23, 0x1p23, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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@ -12133,8 +12132,8 @@ static const struct test_f_f_data trunc_test_data[] =
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TEST_f_f (trunc, 0x1p113, 0x1p113, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0x1p114, 0x1p114, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, max_value, max_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -min_subnorm_value, minus_zero, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -min_value, minus_zero, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -min_subnorm_value, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -min_value, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -1, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -2, -2, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0x1p23, -0x1p23, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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@ -12154,108 +12153,108 @@ static const struct test_f_f_data trunc_test_data[] =
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TEST_f_f (trunc, -0x1p114, -0x1p114, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -max_value, -max_value, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0.1, 0, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0.25, 0, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0.625, 0, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0.1, minus_zero, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0.25, minus_zero, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0.625, minus_zero, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0.1, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0.25, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 0.625, 0, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0.1, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0.25, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -0.625, minus_zero, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 1, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -1, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 1.625, 1, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -1.625, -1, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 1.625, 1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -1.625, -1, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 1048580.625L, 1048580L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -1048580.625L, -1048580L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 1048580.625L, 1048580L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -1048580.625L, -1048580L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 8388610.125L, 8388610.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -8388610.125L, -8388610.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 8388610.125L, 8388610.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -8388610.125L, -8388610.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4294967296.625L, 4294967296.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4294967296.625L, -4294967296.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4294967296.625L, 4294967296.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4294967296.625L, -4294967296.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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#if MANT_DIG >= 64
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/* The result can only be represented in long double. */
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TEST_f_f (trunc, 4503599627370495.5L, 4503599627370495.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.25L, 4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.5L, 4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.75L, 4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370497.5L, 4503599627370497.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370495.5L, 4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.25L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.5L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.75L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370497.5L, 4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# if MANT_DIG > 100
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TEST_f_f (trunc, 4503599627370494.5000000000001L, 4503599627370494.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370495.5000000000001L, 4503599627370495.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.5000000000001L, 4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370494.5000000000001L, 4503599627370494.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370495.5000000000001L, 4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 4503599627370496.5000000000001L, 4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# endif
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TEST_f_f (trunc, -4503599627370495.5L, -4503599627370495.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.25L, -4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.5L, -4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.75L, -4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370497.5L, -4503599627370497.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370495.5L, -4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.25L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.5L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.75L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370497.5L, -4503599627370497.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# if MANT_DIG > 100
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TEST_f_f (trunc, -4503599627370494.5000000000001L, -4503599627370494.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370495.5000000000001L, -4503599627370495.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.5000000000001L, -4503599627370496.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370494.5000000000001L, -4503599627370494.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370495.5000000000001L, -4503599627370495.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -4503599627370496.5000000000001L, -4503599627370496.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# endif
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TEST_f_f (trunc, 9007199254740991.5L, 9007199254740991.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.25L, 9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.5L, 9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.75L, 9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740993.5L, 9007199254740993.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740991.5L, 9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.25L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.5L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.75L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740993.5L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# if MANT_DIG > 100
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TEST_f_f (trunc, 9007199254740991.0000000000001L, 9007199254740991.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.0000000000001L, 9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740993.0000000000001L, 9007199254740993.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740991.5000000000001L, 9007199254740991.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.5000000000001L, 9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740993.5000000000001L, 9007199254740993.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740991.0000000000001L, 9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.0000000000001L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740993.0000000000001L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740991.5000000000001L, 9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740992.5000000000001L, 9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 9007199254740993.5000000000001L, 9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# endif
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TEST_f_f (trunc, -9007199254740991.5L, -9007199254740991.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.25L, -9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.5L, -9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.75L, -9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740993.5L, -9007199254740993.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740991.5L, -9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.25L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.5L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.75L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740993.5L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# if MANT_DIG > 100
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TEST_f_f (trunc, -9007199254740991.0000000000001L, -9007199254740991.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.0000000000001L, -9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740993.0000000000001L, -9007199254740993.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740991.5000000000001L, -9007199254740991.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.5000000000001L, -9007199254740992.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740993.5000000000001L, -9007199254740993.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740991.0000000000001L, -9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.0000000000001L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740993.0000000000001L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740991.5000000000001L, -9007199254740991.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740992.5000000000001L, -9007199254740992.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -9007199254740993.5000000000001L, -9007199254740993.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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# endif
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TEST_f_f (trunc, 72057594037927935.5L, 72057594037927935.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927936.25L, 72057594037927936.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927936.5L, 72057594037927936.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927936.75L, 72057594037927936.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927937.5L, 72057594037927937.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927935.5L, 72057594037927935.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927936.25L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927936.5L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927936.75L, 72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, 72057594037927937.5L, 72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
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TEST_f_f (trunc, -72057594037927935.5L, -72057594037927935.0L, ERRNO_UNCHANGED),
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TEST_f_f (trunc, -72057594037927936.25L, -72057594037927936.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927936.5L, -72057594037927936.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927936.75L, -72057594037927936.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927937.5L, -72057594037927937.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927935.5L, -72057594037927935.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927936.25L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927936.5L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927936.75L, -72057594037927936.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -72057594037927937.5L, -72057594037927937.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
|
||||
/* Check cases where first double is a exact integer higher than 2^52 and
|
||||
the precision is determined by second long double for IBM long double. */
|
||||
TEST_f_f (trunc, 34503599627370498.515625L, 34503599627370498.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -34503599627370498.515625L, -34503599627370498.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 34503599627370498.515625L, 34503599627370498.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -34503599627370498.515625L, -34503599627370498.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
# if MANT_DIG >= 106
|
||||
TEST_f_f (trunc, 1192568192774434123539907640624.484375L, 1192568192774434123539907640624.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -1192568192774434123539907640624.484375L, -1192568192774434123539907640624.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 1192568192774434123539907640624.484375L, 1192568192774434123539907640624.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, -1192568192774434123539907640624.484375L, -1192568192774434123539907640624.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
# endif
|
||||
|
||||
TEST_f_f (trunc, 10141204801825835211973625643007.5L, 10141204801825835211973625643007.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643008.25L, 10141204801825835211973625643008.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643008.5L, 10141204801825835211973625643008.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643008.75L, 10141204801825835211973625643008.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643009.5L, 10141204801825835211973625643009.0L, ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643007.5L, 10141204801825835211973625643007.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643008.25L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643008.5L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643008.75L, 10141204801825835211973625643008.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
TEST_f_f (trunc, 10141204801825835211973625643009.5L, 10141204801825835211973625643009.0L, NO_INEXACT_EXCEPTION|ERRNO_UNCHANGED),
|
||||
#endif
|
||||
};
|
||||
|
||||
|
|
|
|||
|
|
@ -21,17 +21,17 @@
|
|||
|
||||
ENTRY(__trunc)
|
||||
fldl 4(%esp)
|
||||
subl $8, %esp
|
||||
cfi_adjust_cfa_offset (8)
|
||||
fstcw 4(%esp)
|
||||
subl $32, %esp
|
||||
cfi_adjust_cfa_offset (32)
|
||||
fnstenv 4(%esp)
|
||||
movl $0xc00, %edx
|
||||
orl 4(%esp), %edx
|
||||
movl %edx, (%esp)
|
||||
fldcw (%esp)
|
||||
frndint
|
||||
fldcw 4(%esp)
|
||||
addl $8, %esp
|
||||
cfi_adjust_cfa_offset (-8)
|
||||
fldenv 4(%esp)
|
||||
addl $32, %esp
|
||||
cfi_adjust_cfa_offset (-32)
|
||||
ret
|
||||
END(__trunc)
|
||||
weak_alias (__trunc, trunc)
|
||||
|
|
|
|||
|
|
@ -21,17 +21,17 @@
|
|||
|
||||
ENTRY(__truncf)
|
||||
flds 4(%esp)
|
||||
subl $8, %esp
|
||||
cfi_adjust_cfa_offset (8)
|
||||
fstcw 4(%esp)
|
||||
subl $32, %esp
|
||||
cfi_adjust_cfa_offset (32)
|
||||
fnstenv 4(%esp)
|
||||
movl $0xc00, %edx
|
||||
orl 4(%esp), %edx
|
||||
movl %edx, (%esp)
|
||||
fldcw (%esp)
|
||||
frndint
|
||||
fldcw 4(%esp)
|
||||
addl $8, %esp
|
||||
cfi_adjust_cfa_offset (-8)
|
||||
fldenv 4(%esp)
|
||||
addl $32, %esp
|
||||
cfi_adjust_cfa_offset (-32)
|
||||
ret
|
||||
END(__truncf)
|
||||
weak_alias (__truncf, truncf)
|
||||
|
|
|
|||
|
|
@ -21,17 +21,20 @@
|
|||
|
||||
ENTRY(__truncl)
|
||||
fldt 4(%esp)
|
||||
subl $8, %esp
|
||||
cfi_adjust_cfa_offset (8)
|
||||
fstcw 4(%esp)
|
||||
subl $32, %esp
|
||||
cfi_adjust_cfa_offset (32)
|
||||
fnstenv 4(%esp)
|
||||
movl $0xc00, %edx
|
||||
orl 4(%esp), %edx
|
||||
movl %edx, (%esp)
|
||||
fldcw (%esp)
|
||||
frndint
|
||||
fldcw 4(%esp)
|
||||
addl $8, %esp
|
||||
cfi_adjust_cfa_offset (-8)
|
||||
fnstsw
|
||||
andl $0x1, %eax
|
||||
orl %eax, 8(%esp)
|
||||
fldenv 4(%esp)
|
||||
addl $32, %esp
|
||||
cfi_adjust_cfa_offset (-32)
|
||||
ret
|
||||
END(__truncl)
|
||||
weak_alias (__truncl, truncl)
|
||||
|
|
|
|||
|
|
@ -21,13 +21,16 @@
|
|||
|
||||
ENTRY(__truncl)
|
||||
fldt 8(%rsp)
|
||||
fstcw -4(%rsp)
|
||||
fnstenv -28(%rsp)
|
||||
movl $0xc00, %edx
|
||||
orl -4(%rsp), %edx
|
||||
movl %edx, -8(%rsp)
|
||||
fldcw -8(%rsp)
|
||||
orl -28(%rsp), %edx
|
||||
movl %edx, -32(%rsp)
|
||||
fldcw -32(%rsp)
|
||||
frndint
|
||||
fldcw -4(%rsp)
|
||||
fnstsw
|
||||
andl $0x1, %eax
|
||||
orl %eax, -24(%rsp)
|
||||
fldenv -28(%rsp)
|
||||
ret
|
||||
END(__truncl)
|
||||
weak_alias (__truncl, truncl)
|
||||
|
|
|
|||
Loading…
Reference in New Issue