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Diffstat (limited to 'lib/builtins/arm/ltsf2vfp.S')
| -rw-r--r-- | lib/builtins/arm/ltsf2vfp.S | 29 |
1 files changed, 29 insertions, 0 deletions
diff --git a/lib/builtins/arm/ltsf2vfp.S b/lib/builtins/arm/ltsf2vfp.S new file mode 100644 index 000000000..dcaa03561 --- /dev/null +++ b/lib/builtins/arm/ltsf2vfp.S @@ -0,0 +1,29 @@ +//===-- ltsf2vfp.S - Implement ltsf2vfp -----------------------------------===// +// +// 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 int __ltsf2vfp(float a, float b); +// +// Returns one iff a < b and neither is NaN. +// Uses Darwin calling convention where single precision arguments are passsed +// like 32-bit ints +// + .syntax unified + .align 2 +DEFINE_COMPILERRT_FUNCTION(__ltsf2vfp) + vmov s14, r0 // move from GPR 0 to float register + vmov s15, r1 // move from GPR 1 to float register + vcmp.f32 s14, s15 + vmrs apsr_nzcv, fpscr + movmi r0, #1 // set result register to 1 if equal + movpl r0, #0 + bx lr +END_COMPILERRT_FUNCTION(__ltsf2vfp) |