From bc87299ce72a52f4debf9fc19d859abe34dbdf43 Mon Sep 17 00:00:00 2001
From: Alexander Monakov <amonakov@ispras.ru>
Date: Wed, 15 Jan 2020 18:42:46 +0300
Subject: math: move x87-family fmod functions to C with inline asm

---
 src/math/x86_64/fmodl.c |  9 +++++++++
 src/math/x86_64/fmodl.s | 11 -----------
 2 files changed, 9 insertions(+), 11 deletions(-)
 create mode 100644 src/math/x86_64/fmodl.c
 delete mode 100644 src/math/x86_64/fmodl.s

(limited to 'src/math/x86_64')

diff --git a/src/math/x86_64/fmodl.c b/src/math/x86_64/fmodl.c
new file mode 100644
index 00000000..3daeab06
--- /dev/null
+++ b/src/math/x86_64/fmodl.c
@@ -0,0 +1,9 @@
+#include <math.h>
+
+long double fmodl(long double x, long double y)
+{
+	unsigned short fpsr;
+	do __asm__ ("fprem; fnstsw %%ax" : "+t"(x), "=a"(fpsr) : "u"(y));
+	while (fpsr & 0x400);
+	return x;
+}
diff --git a/src/math/x86_64/fmodl.s b/src/math/x86_64/fmodl.s
deleted file mode 100644
index ea07b402..00000000
--- a/src/math/x86_64/fmodl.s
+++ /dev/null
@@ -1,11 +0,0 @@
-.global fmodl
-.type fmodl,@function
-fmodl:
-	fldt 24(%rsp)
-	fldt 8(%rsp)
-1:	fprem
-	fnstsw %ax
-	testb $4,%ah
-	jnz 1b
-	fstp %st(1)
-	ret
-- 
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