newlib: add dummy implementations of fe{get,set}prec for Aarch64 Cygwin

This patch introduces dummy implementation of fegetprec and fsetprec for Cygwin
build as those symbols are being exported by cygwin1.dll and AArch64 do not support
changing floating point precision at runtime.

Signed-off-by: Radek Bartoň <radek.barton@microsoft.com>

5 files changed, 96 insertions, 0 deletions

diff --git a/newlib/Makefile.in b/newlib/Makefile.in
index f98c806..c5492c6 100644
--- a/newlib/Makefile.in
+++ b/newlib/Makefile.in
@@ -3251,11 +3251,13 @@ am__objects_159 = libm/fenv/libm_a-feclearexcept.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-feclearexcept.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fegetenv.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fegetexceptflag.$(OBJEXT) \
+@HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fegetprec.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fegetround.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-feholdexcept.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-feraiseexcept.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fesetenv.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fesetexceptflag.$(OBJEXT) \
+@HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fesetprec.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fesetround.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-fetestexcept.$(OBJEXT) \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/libm_a-feupdateenv.$(OBJEXT)
@@ -5086,11 +5088,13 @@ libm_test_test_LDADD = $(CRT0) libm.a libc.a
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/feclearexcept.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fegetenv.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fegetexceptflag.c \
+@HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fegetprec.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fegetround.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/feholdexcept.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/feraiseexcept.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fesetenv.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fesetexceptflag.c \
+@HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fesetprec.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fesetround.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/fetestexcept.c \
 @HAVE_LIBM_MACHINE_AARCH64_TRUE@	libm/machine/aarch64/feupdateenv.c
@@ -11081,6 +11085,9 @@ libm/machine/aarch64/libm_a-fegetenv.$(OBJEXT):  \
 libm/machine/aarch64/libm_a-fegetexceptflag.$(OBJEXT):  \
 	libm/machine/aarch64/$(am__dirstamp) \
 	libm/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
+libm/machine/aarch64/libm_a-fegetprec.$(OBJEXT):  \
+	libm/machine/aarch64/$(am__dirstamp) \
+	libm/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
 libm/machine/aarch64/libm_a-fegetround.$(OBJEXT):  \
 	libm/machine/aarch64/$(am__dirstamp) \
 	libm/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
@@ -11096,6 +11103,9 @@ libm/machine/aarch64/libm_a-fesetenv.$(OBJEXT):  \
 libm/machine/aarch64/libm_a-fesetexceptflag.$(OBJEXT):  \
 	libm/machine/aarch64/$(am__dirstamp) \
 	libm/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
+libm/machine/aarch64/libm_a-fesetprec.$(OBJEXT):  \
+	libm/machine/aarch64/$(am__dirstamp) \
+	libm/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
 libm/machine/aarch64/libm_a-fesetround.$(OBJEXT):  \
 	libm/machine/aarch64/$(am__dirstamp) \
 	libm/machine/aarch64/$(DEPDIR)/$(am__dirstamp)
@@ -14544,12 +14554,14 @@ distclean-compile:
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-feclearexcept.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fegetenv.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fegetexceptflag.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fegetround.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-feholdexcept.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fenv.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-feraiseexcept.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fesetenv.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fesetexceptflag.Po@am__quote@
+@AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fesetround.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-fetestexcept.Po@am__quote@
 @AMDEP_TRUE@@am__include@ @am__quote@libm/machine/aarch64/$(DEPDIR)/libm_a-feupdateenv.Po@am__quote@
@@ -44362,6 +44374,20 @@ libm/machine/aarch64/libm_a-fegetexceptflag.obj: libm/machine/aarch64/fegetexcep
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -c -o libm/machine/aarch64/libm_a-fegetexceptflag.obj `if test -f 'libm/machine/aarch64/fegetexceptflag.c'; then $(CYGPATH_W) 'libm/machine/aarch64/fegetexceptflag.c'; else $(CYGPATH_W) '$(srcdir)/libm/machine/aarch64/fegetexceptflag.c'; fi`
 
+libm/machine/aarch64/libm_a-fegetprec.o: libm/machine/aarch64/fegetprec.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -MT libm/machine/aarch64/libm_a-fegetprec.o -MD -MP -MF libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Tpo -c -o libm/machine/aarch64/libm_a-fegetprec.o `test -f 'libm/machine/aarch64/fegetprec.c' || echo '$(srcdir)/'`libm/machine/aarch64/fegetprec.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Tpo libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='libm/machine/aarch64/fegetprec.c' object='libm/machine/aarch64/libm_a-fegetprec.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -c -o libm/machine/aarch64/libm_a-fegetprec.o `test -f 'libm/machine/aarch64/fegetprec.c' || echo '$(srcdir)/'`libm/machine/aarch64/fegetprec.c
+
+libm/machine/aarch64/libm_a-fegetprec.obj: libm/machine/aarch64/fegetprec.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -MT libm/machine/aarch64/libm_a-fegetprec.obj -MD -MP -MF libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Tpo -c -o libm/machine/aarch64/libm_a-fegetprec.obj `if test -f 'libm/machine/aarch64/fegetprec.c'; then $(CYGPATH_W) 'libm/machine/aarch64/fegetprec.c'; else $(CYGPATH_W) '$(srcdir)/libm/machine/aarch64/fegetprec.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Tpo libm/machine/aarch64/$(DEPDIR)/libm_a-fegetprec.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='libm/machine/aarch64/fegetprec.c' object='libm/machine/aarch64/libm_a-fegetprec.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -c -o libm/machine/aarch64/libm_a-fegetprec.obj `if test -f 'libm/machine/aarch64/fegetprec.c'; then $(CYGPATH_W) 'libm/machine/aarch64/fegetprec.c'; else $(CYGPATH_W) '$(srcdir)/libm/machine/aarch64/fegetprec.c'; fi`
+
 libm/machine/aarch64/libm_a-fegetround.o: libm/machine/aarch64/fegetround.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -MT libm/machine/aarch64/libm_a-fegetround.o -MD -MP -MF libm/machine/aarch64/$(DEPDIR)/libm_a-fegetround.Tpo -c -o libm/machine/aarch64/libm_a-fegetround.o `test -f 'libm/machine/aarch64/fegetround.c' || echo '$(srcdir)/'`libm/machine/aarch64/fegetround.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) libm/machine/aarch64/$(DEPDIR)/libm_a-fegetround.Tpo libm/machine/aarch64/$(DEPDIR)/libm_a-fegetround.Po
@@ -44432,6 +44458,20 @@ libm/machine/aarch64/libm_a-fesetexceptflag.obj: libm/machine/aarch64/fesetexcep
 @AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
 @am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -c -o libm/machine/aarch64/libm_a-fesetexceptflag.obj `if test -f 'libm/machine/aarch64/fesetexceptflag.c'; then $(CYGPATH_W) 'libm/machine/aarch64/fesetexceptflag.c'; else $(CYGPATH_W) '$(srcdir)/libm/machine/aarch64/fesetexceptflag.c'; fi`
 
+libm/machine/aarch64/libm_a-fesetprec.o: libm/machine/aarch64/fesetprec.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -MT libm/machine/aarch64/libm_a-fesetprec.o -MD -MP -MF libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Tpo -c -o libm/machine/aarch64/libm_a-fesetprec.o `test -f 'libm/machine/aarch64/fesetprec.c' || echo '$(srcdir)/'`libm/machine/aarch64/fesetprec.c
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Tpo libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='libm/machine/aarch64/fesetprec.c' object='libm/machine/aarch64/libm_a-fesetprec.o' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -c -o libm/machine/aarch64/libm_a-fesetprec.o `test -f 'libm/machine/aarch64/fesetprec.c' || echo '$(srcdir)/'`libm/machine/aarch64/fesetprec.c
+
+libm/machine/aarch64/libm_a-fesetprec.obj: libm/machine/aarch64/fesetprec.c
+@am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -MT libm/machine/aarch64/libm_a-fesetprec.obj -MD -MP -MF libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Tpo -c -o libm/machine/aarch64/libm_a-fesetprec.obj `if test -f 'libm/machine/aarch64/fesetprec.c'; then $(CYGPATH_W) 'libm/machine/aarch64/fesetprec.c'; else $(CYGPATH_W) '$(srcdir)/libm/machine/aarch64/fesetprec.c'; fi`
+@am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Tpo libm/machine/aarch64/$(DEPDIR)/libm_a-fesetprec.Po
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	$(AM_V_CC)source='libm/machine/aarch64/fesetprec.c' object='libm/machine/aarch64/libm_a-fesetprec.obj' libtool=no @AMDEPBACKSLASH@
+@AMDEP_TRUE@@am__fastdepCC_FALSE@	DEPDIR=$(DEPDIR) $(CCDEPMODE) $(depcomp) @AMDEPBACKSLASH@
+@am__fastdepCC_FALSE@	$(AM_V_CC@am__nodep@)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -c -o libm/machine/aarch64/libm_a-fesetprec.obj `if test -f 'libm/machine/aarch64/fesetprec.c'; then $(CYGPATH_W) 'libm/machine/aarch64/fesetprec.c'; else $(CYGPATH_W) '$(srcdir)/libm/machine/aarch64/fesetprec.c'; fi`
+
 libm/machine/aarch64/libm_a-fesetround.o: libm/machine/aarch64/fesetround.c
 @am__fastdepCC_TRUE@	$(AM_V_CC)$(CC) $(DEFS) $(DEFAULT_INCLUDES) $(INCLUDES) $(libm_a_CPPFLAGS) $(CPPFLAGS) $(libm_a_CFLAGS) $(CFLAGS) -MT libm/machine/aarch64/libm_a-fesetround.o -MD -MP -MF libm/machine/aarch64/$(DEPDIR)/libm_a-fesetround.Tpo -c -o libm/machine/aarch64/libm_a-fesetround.o `test -f 'libm/machine/aarch64/fesetround.c' || echo '$(srcdir)/'`libm/machine/aarch64/fesetround.c
 @am__fastdepCC_TRUE@	$(AM_V_at)$(am__mv) libm/machine/aarch64/$(DEPDIR)/libm_a-fesetround.Tpo libm/machine/aarch64/$(DEPDIR)/libm_a-fesetround.Po
diff --git a/newlib/libc/machine/aarch64/sys/fenv.h b/newlib/libc/machine/aarch64/sys/fenv.h
index 1f97791..369cc48 100644
--- a/newlib/libc/machine/aarch64/sys/fenv.h
+++ b/newlib/libc/machine/aarch64/sys/fenv.h
@@ -123,6 +123,21 @@ fegetexcept(void)
 
 #endif /* __BSD_VISIBLE */
 
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+#ifdef __CYGWIN__
+
+#if __MISC_VISIBLE
+int fegetprec (void);
+int fesetprec (int __prec);
+#endif
+
+#endif /* __CYGWIN__ */
 
+#ifdef __cplusplus
+}
+#endif
 
 #endif	/* !_FENV_H_ */
diff --git a/newlib/libm/machine/aarch64/Makefile.inc b/newlib/libm/machine/aarch64/Makefile.inc
index 478aaee..0064363 100644
--- a/newlib/libm/machine/aarch64/Makefile.inc
+++ b/newlib/libm/machine/aarch64/Makefile.inc
@@ -33,11 +33,13 @@
 	%D%/feclearexcept.c \
 	%D%/fegetenv.c \
 	%D%/fegetexceptflag.c \
+	%D%/fegetprec.c \
 	%D%/fegetround.c \
 	%D%/feholdexcept.c \
 	%D%/feraiseexcept.c \
 	%D%/fesetenv.c \
 	%D%/fesetexceptflag.c \
+	%D%/fesetprec.c \
 	%D%/fesetround.c \
 	%D%/fetestexcept.c \
 	%D%/feupdateenv.c
diff --git a/newlib/libm/machine/aarch64/fegetprec.c b/newlib/libm/machine/aarch64/fegetprec.c
new file mode 100644
index 0000000..82e08fb
--- /dev/null
+++ b/newlib/libm/machine/aarch64/fegetprec.c
@@ -0,0 +1,17 @@
+#if defined(__CYGWIN__)
+
+/* Returns the currently selected precision, represented by one of the
+   values of the defined precision macros. */
+int
+fegetprec (void)
+{
+  /* AArch64 doesn't have configurable precision.
+     Return a fixed value indicating double precision (most common). */
+  return -1;
+}
+
+#else
+
+#include "../../fenv/fenv_stub.c"
+
+#endif
diff --git a/newlib/libm/machine/aarch64/fesetprec.c b/newlib/libm/machine/aarch64/fesetprec.c
new file mode 100644
index 0000000..dd50700
--- /dev/null
+++ b/newlib/libm/machine/aarch64/fesetprec.c
@@ -0,0 +1,22 @@
+#if defined(__CYGWIN__)
+
+/* http://www.open-std.org/jtc1/sc22//WG14/www/docs/n752.htm:
+
+   The fesetprec function establishes the precision represented by its
+   argument prec.  If the argument does not match a precision macro, the
+   precision is not changed.
+
+   The fesetprec function returns a nonzero value if and only if the
+   argument matches a precision macro (that is, if and only if the requested
+   precision can be established). */
+int
+fesetprec (int prec)
+{
+  /* Aarch64 doesn't support changing precision at runtime. */
+  return 0; // return failure
+}
+#else
+
+#include "../../fenv/fenv_stub.c"
+
+#endif