29 lines
879 B
ArmAsm
29 lines
879 B
ArmAsm
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//===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===//
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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 __ltdf2vfp(double a, double 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 double precision arguments are passsed
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// like in GPR pairs.
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//
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.syntax unified
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.align 2
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DEFINE_COMPILERRT_FUNCTION(__ltdf2vfp)
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vmov d6, r0, r1 // load r0/r1 pair in double register
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vmov d7, r2, r3 // load r2/r3 pair in double register
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vcmp.f64 d6, d7
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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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