Initial import

third_party/compiler_rt/nexgen32e/floatundidf.S

@@ -0,0 +1,56 @@
+//===-- floatundidf.S - Implement __floatundidf for x86_64 ----------------===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is dual licensed under the MIT and the University of Illinois Open
+// Source Licenses. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements __floatundidf for the compiler_rt library.
+//
+//===----------------------------------------------------------------------===//
+
+#include "third_party/compiler_rt/assembly.h"
+
+// double __floatundidf(du_int a);
+
+#ifdef __x86_64__
+
+	.section .yoink
+	nop	huge_compiler_rt_license
+	.previous
+
+CONST_SECTION
+
+	.balign 16
+twop52:
+	.quad 0x4330000000000000
+
+	.balign 16
+twop84_plus_twop52:
+	.quad 0x4530000000100000
+
+	.balign 16
+twop84:
+	.quad 0x4530000000000000
+
+#define REL_ADDR(_a)	(_a)(%rip)
+
+.text
+.balign 4
+DEFINE_COMPILERRT_FUNCTION(__floatundidf)
+	movd	%edi,							%xmm0 // low 32 bits of a
+	shrq	$32,							%rdi  // high 32 bits of a
+	orq		REL_ADDR(twop84),				%rdi  // 0x1p84 + a_hi (no rounding occurs)
+	orpd	REL_ADDR(twop52),				%xmm0 // 0x1p52 + a_lo (no rounding occurs)
+	movd	%rdi,							%xmm1
+	subsd	REL_ADDR(twop84_plus_twop52),	%xmm1 // a_hi - 0x1p52 (no rounding occurs)
+	addsd	%xmm1,							%xmm0 // a_hi + a_lo   (round happens here)
+	ret
+END_COMPILERRT_FUNCTION(__floatundidf)
+
+#endif // __x86_64__
+
+NO_EXEC_STACK_DIRECTIVE
+