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Diffstat (limited to 'lib/builtins/arm/ltdf2vfp.S')
| -rw-r--r-- | lib/builtins/arm/ltdf2vfp.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/builtins/arm/ltdf2vfp.S b/lib/builtins/arm/ltdf2vfp.S new file mode 100644 index 000000000000..9f794b026a4a --- /dev/null +++ b/lib/builtins/arm/ltdf2vfp.S @@ -0,0 +1,29 @@ +//===-- ltdf2vfp.S - Implement ltdf2vfp -----------------------------------===// +// +// The LLVM Compiler Infrastructure +// +// This file is dual licensed under the MIT and the University of Illinois Open +// Source Licenses. See LICENSE.TXT for details. +// +//===----------------------------------------------------------------------===// + +#include "../assembly.h" + +// +// extern double __ltdf2vfp(double a, double b); +// +// Returns one iff a < b and neither is NaN. +// Uses Darwin calling convention where double precision arguments are passsed +// like in GPR pairs. +// + .syntax unified + .p2align 2 +DEFINE_COMPILERRT_FUNCTION(__ltdf2vfp) + vmov d6, r0, r1 // load r0/r1 pair in double register + vmov d7, r2, r3 // load r2/r3 pair in double register + vcmp.f64 d6, d7 + vmrs apsr_nzcv, fpscr + movmi r0, #1 // set result register to 1 if equal + movpl r0, #0 + bx lr +END_COMPILERRT_FUNCTION(__ltdf2vfp) |