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usr / src / contrib / llvm-project / compiler-rt / lib / builtins / i386 /

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📄 ashldi3.S(1.79 KB)
📄 ashrdi3.S(1.92 KB)
📄 chkstk.S(825 B)
📄 chkstk2.S(1.38 KB)
📄 divdi3.S(5.02 KB)
📄 floatdidf.S(1010 B)
📄 floatdisf.S(1.05 KB)
📄 floatdixf.S(1.03 KB)
📄 floatundidf.S(1.37 KB)
📄 floatundisf.S(2.69 KB)
📄 floatundixf.S(1.01 KB)
📄 fp_mode.c(1.14 KB)
📄 lshrdi3.S(1.79 KB)
📄 moddi3.S(5.08 KB)
📄 muldi3.S(751 B)
📄 udivdi3.S(3.52 KB)
📄 umoddi3.S(3.73 KB)

Editing: floatdidf.S

// 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"

// double __floatdidf(du_int a);

#ifdef __i386__

CONST_SECTION

.balign 16
twop52:
	.quad 0x4330000000000000

.balign 16
twop32:
	.quad 0x41f0000000000000

#define REL_ADDR(_a)	(_a)-0b(%eax)

.text
.balign 4
DEFINE_COMPILERRT_FUNCTION(__floatdidf)
	cvtsi2sd	8(%esp),			%xmm1
	movss		4(%esp),			%xmm0 // low 32 bits of a
	calll		0f
0:	popl		%eax
	mulsd		REL_ADDR(twop32),	%xmm1 // a_hi as a double (without rounding)
	movsd		REL_ADDR(twop52),	%xmm2 // 0x1.0p52
	subsd		%xmm2,				%xmm1 // a_hi - 0x1p52 (no rounding occurs)
	orpd		%xmm2,				%xmm0 // 0x1p52 + a_lo (no rounding occurs)
	addsd		%xmm1,				%xmm0 // a_hi + a_lo   (round happens here)
	movsd		%xmm0,			   4(%esp)
	fldl	   4(%esp)
	ret
END_COMPILERRT_FUNCTION(__floatdidf)

#endif // __i386__

NO_EXEC_STACK_DIRECTIVE

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Editing: floatdidf.S

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