1 files changed, 47 insertions, 0 deletions
diff --git a/contrib/llvm-project/compiler-rt/lib/builtins/i386/floatundixf.S b/contrib/llvm-project/compiler-rt/lib/builtins/i386/floatundixf.S
new file mode 100644
index 000000000000..778c3dc0cc76
--- /dev/null
+++ b/contrib/llvm-project/compiler-rt/lib/builtins/i386/floatundixf.S
@@ -0,0 +1,47 @@
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
+
+#include "../assembly.h"
+
+// xf_float __floatundixf(du_int a);16
+
+#ifdef __i386__
+
+CONST_SECTION
+
+	.balign 16
+twop52:
+	.quad 0x4330000000000000
+
+	.balign 16
+twop84_plus_twop52_neg:
+	.quad 0xc530000000100000
+
+	.balign 16
+twop84:
+	.quad 0x4530000000000000
+
+#define REL_ADDR(_a)	(_a)-0b(%eax)
+
+.text
+.balign 4
+DEFINE_COMPILERRT_FUNCTION(__floatundixf)
+	calll	0f
+0:	popl	%eax
+	movss	8(%esp),			%xmm0	// hi 32 bits of input
+	movss	4(%esp),			%xmm1	// lo 32 bits of input
+	orpd	REL_ADDR(twop84),	%xmm0	// 2^84 + hi (as a double)
+	orpd	REL_ADDR(twop52),	%xmm1	// 2^52 + lo (as a double)
+	addsd	REL_ADDR(twop84_plus_twop52_neg),	%xmm0	// hi - 2^52 (no rounding occurs)
+	movsd	%xmm1,				4(%esp)
+	fldl	4(%esp)
+	movsd	%xmm0,				4(%esp)
+	faddl	4(%esp)
+	ret
+END_COMPILERRT_FUNCTION(__floatundixf)
+
+#endif // __i386__
+
+NO_EXEC_STACK_DIRECTIVE
+