From 8e4bff4cab0ddac6060645b0715210484d02ff40 Mon Sep 17 00:00:00 2001
From: Yuval Adam <_@yuv.al>
Date: Wed, 30 Aug 2017 08:25:59 +0000
Subject: Initial file dump from open source release

---
 arch/powerpc/math-emu/fsqrt.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)
 create mode 100644 arch/powerpc/math-emu/fsqrt.c

(limited to 'arch/powerpc/math-emu/fsqrt.c')

diff --git a/arch/powerpc/math-emu/fsqrt.c b/arch/powerpc/math-emu/fsqrt.c
new file mode 100644
index 00000000..a55fc7d4
--- /dev/null
+++ b/arch/powerpc/math-emu/fsqrt.c
@@ -0,0 +1,40 @@
+#include <linux/types.h>
+#include <linux/errno.h>
+#include <asm/uaccess.h>
+
+#include <asm/sfp-machine.h>
+#include <math-emu/soft-fp.h>
+#include <math-emu/double.h>
+
+int
+fsqrt(void *frD, void *frB)
+{
+	FP_DECL_D(B);
+	FP_DECL_D(R);
+	FP_DECL_EX;
+
+#ifdef DEBUG
+	printk("%s: %p %p %p %p\n", __func__, frD, frB);
+#endif
+
+	FP_UNPACK_DP(B, frB);
+
+#ifdef DEBUG
+	printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
+#endif
+
+	if (B_s && B_c != FP_CLS_ZERO)
+		FP_SET_EXCEPTION(EFLAG_VXSQRT);
+	if (B_c == FP_CLS_NAN)
+		FP_SET_EXCEPTION(EFLAG_VXSNAN);
+
+	FP_SQRT_D(R, B);
+
+#ifdef DEBUG
+	printk("R: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
+#endif
+
+	__FP_PACK_D(frD, R);
+
+	return FP_CUR_EXCEPTIONS;
+}
-- 
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