xref: /aosp_15_r20/external/compiler-rt/lib/builtins/arm/gtdf2vfp.S (revision 7c3d14c8b49c529e04be81a3ce6f5cc23712e4c6)
1*7c3d14c8STreehugger Robot//===-- gtdf2vfp.S - Implement gtdf2vfp -----------------------------------===//
2*7c3d14c8STreehugger Robot//
3*7c3d14c8STreehugger Robot//                     The LLVM Compiler Infrastructure
4*7c3d14c8STreehugger Robot//
5*7c3d14c8STreehugger Robot// This file is dual licensed under the MIT and the University of Illinois Open
6*7c3d14c8STreehugger Robot// Source Licenses. See LICENSE.TXT for details.
7*7c3d14c8STreehugger Robot//
8*7c3d14c8STreehugger Robot//===----------------------------------------------------------------------===//
9*7c3d14c8STreehugger Robot
10*7c3d14c8STreehugger Robot#include "../assembly.h"
11*7c3d14c8STreehugger Robot
12*7c3d14c8STreehugger Robot//
13*7c3d14c8STreehugger Robot// extern double __gtdf2vfp(double a, double b);
14*7c3d14c8STreehugger Robot//
15*7c3d14c8STreehugger Robot// Returns one iff a > b and neither is NaN.
16*7c3d14c8STreehugger Robot// Uses Darwin calling convention where double precision arguments are passsed
17*7c3d14c8STreehugger Robot// like in GPR pairs.
18*7c3d14c8STreehugger Robot//
19*7c3d14c8STreehugger Robot	.syntax unified
20*7c3d14c8STreehugger Robot	.p2align 2
21*7c3d14c8STreehugger RobotDEFINE_COMPILERRT_FUNCTION(__gtdf2vfp)
22*7c3d14c8STreehugger Robot	vmov 	d6, r0, r1	// load r0/r1 pair in double register
23*7c3d14c8STreehugger Robot	vmov 	d7, r2, r3	// load r2/r3 pair in double register
24*7c3d14c8STreehugger Robot	vcmp.f64 d6, d7
25*7c3d14c8STreehugger Robot	vmrs	apsr_nzcv, fpscr
26*7c3d14c8STreehugger Robot	movgt	r0, #1		// set result register to 1 if equal
27*7c3d14c8STreehugger Robot	movle	r0, #0
28*7c3d14c8STreehugger Robot	bx	lr
29*7c3d14c8STreehugger RobotEND_COMPILERRT_FUNCTION(__gtdf2vfp)
30*7c3d14c8STreehugger Robot
31*7c3d14c8STreehugger RobotNO_EXEC_STACK_DIRECTIVE
32*7c3d14c8STreehugger Robot
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