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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
33 lines
940 B
ArmAsm
33 lines
940 B
ArmAsm
//===-- ltsf2vfp.S - Implement ltsf2vfp -----------------------------------===//
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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 int __ltsf2vfp(float a, float b);
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//
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// Returns one iff a < b and neither is NaN.
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// Uses Darwin calling convention where single precision arguments are passsed
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// like 32-bit ints
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//
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.syntax unified
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.p2align 2
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DEFINE_COMPILERRT_FUNCTION(__ltsf2vfp)
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vmov s14, r0 // move from GPR 0 to float register
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vmov s15, r1 // move from GPR 1 to float register
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vcmp.f32 s14, s15
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vmrs apsr_nzcv, fpscr
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movmi r0, #1 // set result register to 1 if equal
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movpl r0, #0
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bx lr
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END_COMPILERRT_FUNCTION(__ltsf2vfp)
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NO_EXEC_STACK_DIRECTIVE
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