From 66d1e31292a8c05d172872fe73880ca6d3b68104 Mon Sep 17 00:00:00 2001
From: rofl0r <rofl0r@users.noreply.github.com>
Date: Tue, 5 Nov 2019 21:01:42 +0000
Subject: [PATCH] ppc: add configure check for older compilers erroring on 'd'
 constraint

---
 configure               | 9 +++++++++
 src/math/powerpc/fabs.c | 2 +-
 src/math/powerpc/fma.c  | 2 +-
 3 files changed, 11 insertions(+), 2 deletions(-)

diff --git a/configure b/configure
index 86801281..a2728969 100755
--- a/configure
+++ b/configure
@@ -646,6 +646,15 @@ if test "$ARCH" = "powerpc" ; then
 trycppif "__NO_FPRS__ && !_SOFT_FLOAT" "$t" && fail \
   "$0: error: compiler's floating point configuration is unsupported"
 trycppif _SOFT_FLOAT "$t" && SUBARCH=${SUBARCH}-sf
+printf "checking whether compiler can use 'd' constraint in asm... "
+echo 'double f(double x) { __asm__ ("fabs %0, %1" : "=d"(x) : "d"(x)); return x; }' > "$tmpc"
+if $CC $CFLAGS_C99FSE $CPPFLAGS $CFLAGS -c -o /dev/null "$tmpc" >/dev/null 2>&1 ; then
+printf "yes\n"
+else
+printf "no\n"
+CFLAGS_AUTO="$CFLAGS_AUTO -DBROKEN_PPC_D_ASM"
+CFLAGS_AUTO="${CFLAGS_AUTO# }"
+fi
 fi
 
 test "$ARCH" = "microblaze" && trycppif __MICROBLAZEEL__ "$t" \
diff --git a/src/math/powerpc/fabs.c b/src/math/powerpc/fabs.c
index f6ec4433..0efc21ef 100644
--- a/src/math/powerpc/fabs.c
+++ b/src/math/powerpc/fabs.c
@@ -1,6 +1,6 @@
 #include <math.h>
 
-#ifdef _SOFT_FLOAT
+#if defined(_SOFT_FLOAT) || defined(BROKEN_PPC_D_ASM)
 
 #include "../fabs.c"
 
diff --git a/src/math/powerpc/fma.c b/src/math/powerpc/fma.c
index fd268f5f..135c9903 100644
--- a/src/math/powerpc/fma.c
+++ b/src/math/powerpc/fma.c
@@ -1,6 +1,6 @@
 #include <math.h>
 
-#ifdef _SOFT_FLOAT
+#if defined(_SOFT_FLOAT) || defined(BROKEN_PPC_D_ASM)
 
 #include "../fma.c"
 
-- 
2.25.1