PowerPC: fix hypot/hypof FP exceptions
This patch fixes hypot/hypotf spurious floating-point exceptions generate by internal operations.
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@ -1,3 +1,11 @@
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2013-05-06 Adhemerval Zanella <azanella@linux.vnet.ibm.com>
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[BZ #15418]
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[BZ #15419]
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* sysdeps/powerpc/fpu/e_hypot.c: Fix spurious FP exception generated by
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internal tests.
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* sysdeps/powerpc/fpu/e_hypotf.c: Likewise.
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2013-05-06 Roland McGrath <roland@hack.frob.com>
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* elf/dl-writev.h: New file.
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2
NEWS
2
NEWS
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@ -16,7 +16,7 @@ Version 2.18
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15084, 15085, 15086, 15160, 15214, 15221, 15232, 15234, 15283, 15285,
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15287, 15304, 15305, 15307, 15309, 15327, 15330, 15335, 15336, 15337,
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15342, 15346, 15361, 15366, 15380, 15394, 15405, 15406, 15409, 15416,
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15423.
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15418, 15419, 15423.
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* CVE-2013-0242 Buffer overrun in regexp matcher has been fixed (Bugzilla
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#15078).
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@ -9159,6 +9159,7 @@ hypot_test (void)
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TEST_ff_f (hypot, 0.75L, 1.25L, 1.45773797371132511771853821938639577L);
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TEST_ff_f (hypot, 1.0L, 0x1p-61L, 1.0L);
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TEST_ff_f (hypot, 0x1p+0L, 0x1.fp-129L, 0x1p+0L);
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#if defined TEST_LDOUBLE && LDBL_MANT_DIG >= 106
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TEST_ff_f (hypot, 0x1.23456789abcdef0123456789ab8p-500L, 0x1.23456789abcdef0123456789ab8p-500L, 4.9155782399407039128612180934736799735113e-151L);
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#endif
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@ -9170,6 +9171,7 @@ hypot_test (void)
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#if !defined TEST_FLOAT && !(defined TEST_DOUBLE && defined TEST_INLINE)
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TEST_ff_f (hypot, 0x3p1021L, 0x4p1021L, 0x5p1021L);
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TEST_ff_f (hypot, 0x1p+0L, 0x0.3ep-1022L, 0x1p+0L);
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#endif
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#if defined TEST_LDOUBLE && LDBL_MAX_EXP >= 16384 && !defined TEST_INLINE
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@ -26,6 +26,7 @@ static const double two600 = 4.149515568880993e+180;
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static const double two1022 = 4.49423283715579e+307;
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static const double twoM500 = 3.054936363499605e-151;
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static const double twoM600 = 2.4099198651028841e-181;
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static const double two60factor = 1.5592502418239997e+290;
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static const double pdnum = 2.225073858507201e-308;
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/* __ieee754_hypot(x,y)
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@ -87,9 +88,20 @@ __ieee754_hypot (double x, double y)
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x = y;
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y = t;
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}
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if (y == 0.0 || (x / y) > two60)
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if (y == 0.0)
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return x;
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/* if y is higher enough, y * 2^60 might overflow. The tests if
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y >= 1.7976931348623157e+308/2^60 (two60factor) and uses the
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appropriate check to avoid the overflow exception generation. */
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if (y > two60factor)
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{
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return x + y;
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if ((x / y) > two60)
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return x + y;
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}
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else
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{
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if (x > (y * two60))
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return x + y;
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}
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if (x > two500)
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{
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@ -69,22 +69,8 @@ static const float two30 = 1.0737418e09;
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float
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__ieee754_hypotf (float x, float y)
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{
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x = fabsf (x);
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y = fabsf (y);
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TEST_INF_NAN (x, y);
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if (y > x)
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{
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float t = y;
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y = x;
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x = t;
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}
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if (y == 0.0 || (x / y) > two30)
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{
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return x + y;
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}
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return __ieee754_sqrt ((double) x * x + (double) y * y);
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}
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strong_alias (__ieee754_hypotf, __hypotf_finite)
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