2009-09-12 09:23:48 +08:00
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//===-- unorddf2vfp.S - Implement unorddf2vfp ------------------------------===//
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//
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// The LLVM Compiler Infrastructure
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//
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2010-11-17 06:13:33 +08:00
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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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2009-09-12 09:23:48 +08:00
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//
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//===----------------------------------------------------------------------===//
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2009-10-28 01:49:50 +08:00
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#include "../assembly.h"
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2009-09-12 09:23:48 +08:00
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//
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// extern int __unorddf2vfp(double a, double b);
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//
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// Returns one iff a or b 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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2011-08-24 00:40:18 +08:00
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.syntax unified
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2010-04-22 06:36:23 +08:00
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.align 2
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2009-10-28 01:50:21 +08:00
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DEFINE_COMPILERRT_FUNCTION(__unorddf2vfp)
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2011-08-24 00:40:18 +08:00
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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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2009-09-12 09:23:48 +08:00
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movvs r0, #1 // set result register to 1 if "overflow" (any NaNs)
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movvc r0, #0
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bx lr
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