The branch main has been updated by arichardson:

URL: 
https://cgit.FreeBSD.org/src/commit/?id=a7b42c4b7f7ad7bd1b22ab57ed9185bdcea6f0a2

commit a7b42c4b7f7ad7bd1b22ab57ed9185bdcea6f0a2
Author:     Alex Richardson <[email protected]>
AuthorDate: 2021-02-15 22:06:41 +0000
Commit:     Alex Richardson <[email protected]>
CommitDate: 2021-02-15 22:55:12 +0000

    msun: ctanh/ctanhf: Import fix from musl libc
    
    This applies musl commit b02eed9c4841913d690a2d0029737d72615384fe by
    Szabolcs Nagy and updates the tests accordingly. This also allows
    removing an XFAIL from the test.
    
    musl commit message:
    
    complex: fix ctanh(+-0+i*nan) and ctanh(+-0+-i*inf)
    
    These cases were incorrect in C11 as described by
    http://www.open-std.org/jtc1/sc22/wg14/www/docs/n1886.htm
    
    PR: 217528
    
    Reviewed By:    dim
    MFC after:      1 week
    Differential Revision: https://reviews.freebsd.org/D28578
---
 lib/msun/src/s_ctanh.c      |  8 +++++---
 lib/msun/src/s_ctanhf.c     |  2 +-
 lib/msun/tests/ctrig_test.c | 23 ++++++++---------------
 3 files changed, 14 insertions(+), 19 deletions(-)

diff --git a/lib/msun/src/s_ctanh.c b/lib/msun/src/s_ctanh.c
index 13eb9d40b678..93e5ad444501 100644
--- a/lib/msun/src/s_ctanh.c
+++ b/lib/msun/src/s_ctanh.c
@@ -111,11 +111,13 @@ ctanh(double complex z)
        }
 
        /*
-        * ctanh(x + I NaN) = d(NaN) + I d(NaN)
-        * ctanh(x +- I Inf) = dNaN + I dNaN
+        * ctanh(+-0 + i NAN) = +-0 + i NaN
+        * ctanh(+-0 +- i Inf) = +-0 + i NaN
+        * ctanh(x + i NAN) = NaN + i NaN
+        * ctanh(x +- i Inf) = NaN + i NaN
         */
        if (!isfinite(y))
-               return (CMPLX(y - y, y - y));
+               return (CMPLX(x ? y - y : x, y - y));
 
        /*
         * ctanh(+-huge +- I y) ~= +-1 +- I 2sin(2y)/exp(2x), using the
diff --git a/lib/msun/src/s_ctanhf.c b/lib/msun/src/s_ctanhf.c
index 7d375eafd2ae..164a2c23df9e 100644
--- a/lib/msun/src/s_ctanhf.c
+++ b/lib/msun/src/s_ctanhf.c
@@ -61,7 +61,7 @@ ctanhf(float complex z)
        }
 
        if (!isfinite(y))
-               return (CMPLXF(y - y, y - y));
+               return (CMPLXF(ix ? y - y : x, y - y));
 
        if (ix >= 0x41300000) { /* |x| >= 11 */
                float exp_mx = expf(-fabsf(x));
diff --git a/lib/msun/tests/ctrig_test.c b/lib/msun/tests/ctrig_test.c
index 45b2b78b0416..b40373fed29b 100644
--- a/lib/msun/tests/ctrig_test.c
+++ b/lib/msun/tests/ctrig_test.c
@@ -138,13 +138,6 @@ ATF_TC_BODY(test_zero_input, tc)
 {
        long double complex zero = CMPLXL(0.0, 0.0);
 
-#if defined(__amd64__)
-#if defined(__clang__) && \
-       ((__clang_major__ >= 4))
-       atf_tc_expect_fail("test fails with clang 4.x+ - bug 217528");
-#endif
-#endif
-
        /* csinh(0) = ctanh(0) = 0; ccosh(0) = 1 (no exceptions raised) */
        testall_odd(csinh, zero, zero, ALL_STD_EXCEPT, 0, CS_BOTH);
        testall_odd(csin, zero, zero, ALL_STD_EXCEPT, 0, CS_BOTH);
@@ -171,8 +164,8 @@ ATF_TC_BODY(test_nan_inputs, tc)
         * NaN,finite   NaN,NaN [inval] NaN,NaN [inval] NaN,NaN [inval]
         * NaN,Inf      NaN,NaN [inval] NaN,NaN [inval] NaN,NaN [inval]
         * Inf,NaN      +-Inf,NaN       Inf,NaN         1,+-0
-        * 0,NaN        +-0,NaN         NaN,+-0         NaN,NaN [inval]
-        * NaN,0        NaN,0           NaN,+-0         NaN,0
+        * 0,NaN        +-0,NaN         NaN,+-0         +-0,NaN
+        * NaN,0        NaN,0           NaN,+-0         NaN,+-0
         */
        z = nan_nan;
        testall_odd(csinh, z, nan_nan, ALL_STD_EXCEPT, 0, 0);
@@ -219,9 +212,9 @@ ATF_TC_BODY(test_nan_inputs, tc)
        testall_odd(ctan, z, nan_nan, OPT_INVALID, 0, 0);
 
        z = CMPLXL(0, NAN);
-       testall_odd(csinh, z, CMPLXL(0, NAN), ALL_STD_EXCEPT, 0, 0);
+       testall_odd(csinh, z, CMPLXL(0, NAN), ALL_STD_EXCEPT, 0, CS_REAL);
        testall_even(ccosh, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, 0, 0);
-       testall_odd(ctanh, z, nan_nan, OPT_INVALID, 0, 0);
+       testall_odd(ctanh, z, CMPLXL(0, NAN), OPT_INVALID, 0, CS_REAL);
        testall_odd(csin, z, CMPLXL(0, NAN), ALL_STD_EXCEPT, 0, CS_REAL);
        testall_even(ccos, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, 0, 0);
        testall_odd(ctan, z, CMPLXL(0, NAN), ALL_STD_EXCEPT, 0, CS_REAL);
@@ -232,7 +225,7 @@ ATF_TC_BODY(test_nan_inputs, tc)
        testall_odd(ctanh, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, 0, CS_IMAG);
        testall_odd(csin, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, 0, 0);
        testall_even(ccos, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, 0, 0);
-       testall_odd(ctan, z, nan_nan, OPT_INVALID, 0, 0);
+       testall_odd(ctan, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, 0, CS_IMAG);
 }
 
 ATF_TC(test_inf_inputs);
@@ -252,7 +245,7 @@ ATF_TC_BODY(test_inf_inputs, tc)
         * IN           CSINH           CCOSH           CTANH
         * Inf,Inf      +-Inf,NaN inval +-Inf,NaN inval 1,+-0
         * Inf,finite   Inf cis(finite) Inf cis(finite) 1,0 sin(2 finite)
-        * 0,Inf        +-0,NaN inval   NaN,+-0 inval   NaN,NaN inval
+        * 0,Inf        +-0,NaN inval   NaN,+-0 inval   +-0,NaN
         * finite,Inf   NaN,NaN inval   NaN,NaN inval   NaN,NaN inval
         */
        z = CMPLXL(INFINITY, INFINITY);
@@ -286,11 +279,11 @@ ATF_TC_BODY(test_inf_inputs, tc)
        z = CMPLXL(0, INFINITY);
        testall_odd(csinh, z, CMPLXL(0, NAN), ALL_STD_EXCEPT, FE_INVALID, 0);
        testall_even(ccosh, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, FE_INVALID, 0);
-       testall_odd(ctanh, z, CMPLXL(NAN, NAN), ALL_STD_EXCEPT, FE_INVALID, 0);
+       testall_odd(ctanh, z, CMPLXL(0, NAN), ALL_STD_EXCEPT, FE_INVALID, 
CS_REAL);
        z = CMPLXL(INFINITY, 0);
        testall_odd(csin, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, FE_INVALID, 0);
        testall_even(ccos, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, FE_INVALID, 0);
-       testall_odd(ctan, z, CMPLXL(NAN, NAN), ALL_STD_EXCEPT, FE_INVALID, 0);
+       testall_odd(ctan, z, CMPLXL(NAN, 0), ALL_STD_EXCEPT, FE_INVALID, 
CS_IMAG);
 
        z = CMPLXL(42, INFINITY);
        testall_odd(csinh, z, CMPLXL(NAN, NAN), ALL_STD_EXCEPT, FE_INVALID, 0);
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