1*7c3d14c8STreehugger Robot// This file is dual licensed under the MIT and the University of Illinois Open 2*7c3d14c8STreehugger Robot// Source Licenses. See LICENSE.TXT for details. 3*7c3d14c8STreehugger Robot 4*7c3d14c8STreehugger Robot#include "../assembly.h" 5*7c3d14c8STreehugger Robot 6*7c3d14c8STreehugger Robot// float __floatdixf(di_int a); 7*7c3d14c8STreehugger Robot 8*7c3d14c8STreehugger Robot#ifdef __i386__ 9*7c3d14c8STreehugger Robot 10*7c3d14c8STreehugger Robot// This routine has some extra memory traffic, loading the 64-bit input via two 11*7c3d14c8STreehugger Robot// 32-bit loads, then immediately storing it back to the stack via a single 64-bit 12*7c3d14c8STreehugger Robot// store. This is to avoid a write-small, read-large stall. 13*7c3d14c8STreehugger Robot// However, if callers of this routine can be safely assumed to store the argument 14*7c3d14c8STreehugger Robot// via a 64-bt store, this is unnecessary memory traffic, and should be avoided. 15*7c3d14c8STreehugger Robot// It can be turned off by defining the TRUST_CALLERS_USE_64_BIT_STORES macro. 16*7c3d14c8STreehugger Robot 17*7c3d14c8STreehugger Robot.text 18*7c3d14c8STreehugger Robot.balign 4 19*7c3d14c8STreehugger RobotDEFINE_COMPILERRT_FUNCTION(__floatdixf) 20*7c3d14c8STreehugger Robot#ifndef TRUST_CALLERS_USE_64_BIT_STORES 21*7c3d14c8STreehugger Robot movd 4(%esp), %xmm0 22*7c3d14c8STreehugger Robot movd 8(%esp), %xmm1 23*7c3d14c8STreehugger Robot punpckldq %xmm1, %xmm0 24*7c3d14c8STreehugger Robot movq %xmm0, 4(%esp) 25*7c3d14c8STreehugger Robot#endif 26*7c3d14c8STreehugger Robot fildll 4(%esp) 27*7c3d14c8STreehugger Robot ret 28*7c3d14c8STreehugger RobotEND_COMPILERRT_FUNCTION(__floatdixf) 29*7c3d14c8STreehugger Robot 30*7c3d14c8STreehugger Robot#endif // __i386__ 31*7c3d14c8STreehugger Robot 32*7c3d14c8STreehugger RobotNO_EXEC_STACK_DIRECTIVE 33*7c3d14c8STreehugger Robot 34