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authorUlrich Drepper <drepper@redhat.com>2005-10-13 19:08:37 +0000
committerUlrich Drepper <drepper@redhat.com>2005-10-13 19:08:37 +0000
commit72c7a71de49af5e025f5c064079b25631af6c457 (patch)
treef23a04f2d44106152e2efef0f9da08e38dd2090e /math/libm-test.inc
parent1676aaeffd2e156e6d15d3aa59c35214e6a6a2b1 (diff)
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[BZ #1466]
	* sysdeps/generic/s_csqrt.c (__csqrt): For zero real part, return
	principal square root.
	* sysdeps/generic/s_csqrtf.c (__csqrtf): Likewise.
	* sysdeps/generic/s_csqrtl.c (__csqrtl): Likewise.
	* math/libm-test.inc (csqrt_test): Add test for returning
	principal value.
Diffstat (limited to 'math/libm-test.inc')
-rw-r--r--math/libm-test.inc6
1 files changed, 5 insertions, 1 deletions
diff --git a/math/libm-test.inc b/math/libm-test.inc
index be05222629..15509019c9 100644
--- a/math/libm-test.inc
+++ b/math/libm-test.inc
@@ -1,4 +1,4 @@
-/* Copyright (C) 1997-2002, 2003, 2004 Free Software Foundation, Inc.
+/* Copyright (C) 1997-2002, 2003, 2004, 2005 Free Software Foundation, Inc.
    This file is part of the GNU C Library.
    Contributed by Andreas Jaeger <aj@suse.de>, 1997.
 
@@ -153,6 +153,7 @@
 #define M_PI2_LOG10El		M_PI_2l * M_LOG10El
 #define M_PI4_LOG10El		M_PI_4l * M_LOG10El
 #define M_PI_LOG10El		M_PIl * M_LOG10El
+#define M_SQRT_2_2		0.70710678118654752440084436210484903L /* sqrt (2) / 2 */
 
 static FILE *ulps_file;	/* File to document difference.  */
 static int output_ulps;	/* Should ulps printed?  */
@@ -2212,6 +2213,9 @@ csqrt_test (void)
   TEST_c_c (csqrt, 0.75L, 1.25L, 1.05065169626078392338656675760808326L, 0.594868882070379067881984030639932657L);
   TEST_c_c (csqrt, -2, -3, 0.89597747612983812471573375529004348L, -1.6741492280355400404480393008490519L);
   TEST_c_c (csqrt, -2, 3, 0.89597747612983812471573375529004348L, 1.6741492280355400404480393008490519L);
+  /* Principal square root should be returned (i.e., non-negative real
+     part).  */
+  TEST_c_c (csqrt, 0, -1, M_SQRT_2_2, -M_SQRT_2_2);
 
   END (csqrt, complex);
 }