From b7b88cea4151d85eafd7ababc2e4b7ae1daeedf5 Mon Sep 17 00:00:00 2001
From: "Gabriel F. T. Gomes" <gabriel@inconstante.eti.br>
Date: Thu, 28 Jun 2018 22:38:55 -0300
Subject: ldbl-128ibm-compat: Add printf_size

Since the addition of the _Float128 API, strfromf128 and printf_size use
__printf_fp to print _Float128 values.  This is achieved by setting the
'is_binary128' member of the 'printf_info' structure to one.  Now that
the format of long double on powerpc64le is getting a third option, this
mechanism is reused for long double values that have binary128 format
(i.e.: when -mabi=ieeelongdouble).

This patch adds __printf_sizeieee128 as an exported symbol, but doesn't
provide redirections from printf_size, yet.  All redirections will be
installed in a future commit, once all other functions that print or
read long double values with binary128 format are ready.  In
__printf_fp, when 'is_binary128' is one, the floating-point argument is
treated as if it was of _Float128 type, regardless of the value of
'is_long_double', thus __printf_sizeieee128 sets 'is_binary128' to the
same value of 'is_long_double'.  Otherwise, double values would not be
printed correctly.

Tested for powerpc64le.
---
 stdio-common/Makefile | 10 ++++++++--
 1 file changed, 8 insertions(+), 2 deletions(-)

(limited to 'stdio-common/Makefile')

diff --git a/stdio-common/Makefile b/stdio-common/Makefile
index 738a3cead0..96bd7c303a 100644
--- a/stdio-common/Makefile
+++ b/stdio-common/Makefile
@@ -63,13 +63,14 @@ tests := tstscanf test_rdwr test-popen tstgetln test-fseek \
 	 tst-vfprintf-mbs-prec \
 	 tst-scanf-round \
 
-test-srcs = tst-unbputc tst-printf
+test-srcs = tst-unbputc tst-printf tst-printfsz-islongdouble
 
 ifeq ($(run-built-tests),yes)
 tests-special += $(objpfx)tst-unbputc.out $(objpfx)tst-printf.out \
 		 $(objpfx)tst-printf-bz18872-mem.out \
 		 $(objpfx)tst-setvbuf1-cmp.out \
-		 $(objpfx)tst-vfprintf-width-prec-mem.out
+		 $(objpfx)tst-vfprintf-width-prec-mem.out \
+		 $(objpfx)tst-printfsz-islongdouble.out
 generated += tst-printf-bz18872.c tst-printf-bz18872.mtrace \
 	     tst-printf-bz18872-mem.out \
 	     tst-vfprintf-width-prec.mtrace tst-vfprintf-width-prec-mem.out
@@ -103,6 +104,11 @@ $(objpfx)tst-printf.out: tst-printf.sh $(objpfx)tst-printf
 	$(SHELL) $< $(common-objpfx) '$(test-program-prefix)' > $@; \
 	$(evaluate-test)
 
+$(objpfx)tst-printfsz-islongdouble.out: \
+  tst-printfsz-islongdouble.sh $(objpfx)tst-printfsz-islongdouble
+	$(SHELL) $^ '$(test-program-prefix)' $@; \
+	$(evaluate-test)
+
 # We generate this source because it requires a printf invocation with
 # 10K arguments.
 $(objpfx)tst-printf-bz18872.c: tst-printf-bz18872.sh
-- 
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