contrib/compiler-rt/lib/builtins/arm/aeabi_fcmp.S

   1 //===-- aeabi_fcmp.S - EABI fcmp* implementation ---------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is dual licensed under the MIT and the University of Illinois Open
   6 // Source Licenses. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "../assembly.h"
  11
  12 // int __aeabi_fcmp{eq,lt,le,ge,gt}(float a, float b) {
  13 //   int result = __{eq,lt,le,ge,gt}sf2(a, b);
  14 //   if (result {==,<,<=,>=,>} 0) {
  15 //     return 1;
  16 //   } else {
  17 //     return 0;
  18 //   }
  19 // }
  20
  21 #if defined(COMPILER_RT_ARMHF_TARGET)
  22 #  define CONVERT_FCMP_ARGS_TO_SF2_ARGS                    \
  23         vmov      s0, r0                         SEPARATOR \
  24         vmov      s1, r1
  25 #else
  26 #  define CONVERT_FCMP_ARGS_TO_SF2_ARGS
  27 #endif
  28
  29 #define DEFINE_AEABI_FCMP(cond)                            \
  30         .syntax unified                          SEPARATOR \
  31         .p2align 2                               SEPARATOR \
  32 DEFINE_COMPILERRT_FUNCTION(__aeabi_fcmp ## cond)           \
  33         push      { r4, lr }                     SEPARATOR \
  34         CONVERT_FCMP_ARGS_TO_SF2_ARGS            SEPARATOR \
  35         bl        SYMBOL_NAME(__ ## cond ## sf2) SEPARATOR \
  36         cmp       r0, #0                         SEPARATOR \
  37         b ## cond 1f                             SEPARATOR \
  38         movs      r0, #0                         SEPARATOR \
  39         pop       { r4, pc }                     SEPARATOR \
  40 1:                                               SEPARATOR \
  41         movs      r0, #1                         SEPARATOR \
  42         pop       { r4, pc }                     SEPARATOR \
  43 END_COMPILERRT_FUNCTION(__aeabi_fcmp ## cond)
  44
  45 DEFINE_AEABI_FCMP(eq)
  46 DEFINE_AEABI_FCMP(lt)
  47 DEFINE_AEABI_FCMP(le)
  48 DEFINE_AEABI_FCMP(ge)
  49 DEFINE_AEABI_FCMP(gt)
  50
  51 NO_EXEC_STACK_DIRECTIVE
  52