590e85b575
These routines do not require executable stacks. However, by default ELFish linkers may assume an executable stack on GNUish environments (and some non-GNU ones too!). The GNU extension to add a note to indicate a non-executable stack is honoured by these environments to mark the stack as non-executable (the compiler normally emits this directive on appropriate targets whenever possible). This allows normal builds from getting executable stacks due to linking to the compiler rt builtins. llvm-svn: 273500
30 lines
937 B
ArmAsm
30 lines
937 B
ArmAsm
//===-- floatunssidfvfp.S - Implement floatunssidfvfp ---------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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// This file is dual licensed under the MIT and the University of Illinois Open
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// Source Licenses. See LICENSE.TXT for details.
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//
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//===----------------------------------------------------------------------===//
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#include "../assembly.h"
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//
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// extern double __floatunssidfvfp(unsigned int a);
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//
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// Converts a 32-bit int to a double precision float.
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// Uses Darwin calling convention where a double precision result is
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// return in GPR register pair.
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__floatunssidfvfp)
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vmov s15, r0 // move int to float register s15
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vcvt.f64.u32 d7, s15 // convert 32-bit int in s15 to double in d7
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vmov r0, r1, d7 // move d7 to result register pair r0/r1
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bx lr
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END_COMPILERRT_FUNCTION(__floatunssidfvfp)
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NO_EXEC_STACK_DIRECTIVE
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