truncf.S 2.6 KB

123456789101112131415161718192021222324252627282930313233343536373839404142434445464748495051525354555657585960616263646566676869707172737475767778798081828384
  1. /*
  2. * Math library
  3. *
  4. * Copyright (C) 2016 Intel Corporation. All rights reserved.
  5. *
  6. * Redistribution and use in source and binary forms, with or without
  7. * modification, are permitted provided that the following conditions
  8. * are met:
  9. *
  10. * * Redistributions of source code must retain the above copyright
  11. * notice, this list of conditions and the following disclaimer.
  12. * * Redistributions in binary form must reproduce the above copyright
  13. * notice, this list of conditions and the following disclaimer in
  14. * the documentation and/or other materials provided with the
  15. * distribution.
  16. * * Neither the name of Intel Corporation nor the names of its
  17. * contributors may be used to endorse or promote products derived
  18. * from this software without specific prior written permission.
  19. *
  20. * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  21. * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  22. * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  23. * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  24. * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  25. * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  26. * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  27. * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  28. * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  29. * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  30. * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  31. *
  32. *
  33. * Author Name <jingwei.zhang@intel.com>
  34. * History:
  35. * 03-14-2016 Initial version. numerics svn rev. 12864
  36. */
  37. .file "truncf.c"
  38. .text
  39. ..TXTST0:
  40. # -- Begin truncf
  41. .text
  42. .align 16,0x90
  43. .globl truncf
  44. truncf:
  45. # parameter 1: 4 + %esp
  46. ..B1.1:
  47. ..L1:
  48. movl 4(%esp), %eax
  49. movl %eax, %ecx
  50. andl $2147483647, %ecx
  51. addl $-1065353216, %ecx
  52. cmpl $192937984, %ecx
  53. jb ..B1.5
  54. ..B1.2:
  55. testl %ecx, %ecx
  56. jl ..B1.6
  57. ..B1.3:
  58. flds 4(%esp)
  59. ..B1.4:
  60. ret
  61. ..B1.5:
  62. shrl $23, %ecx
  63. movl $-1, %edx
  64. negl %ecx
  65. addl $23, %ecx
  66. shll %cl, %edx
  67. andl %edx, %eax
  68. movl %eax, 4(%esp)
  69. flds 4(%esp)
  70. ret
  71. ..B1.6:
  72. andl $-2147483648, %eax
  73. movl %eax, 4(%esp)
  74. flds 4(%esp)
  75. ret
  76. .align 16,0x90
  77. .type truncf,@function
  78. .size truncf,.-truncf
  79. .data
  80. # -- End truncf
  81. .data
  82. .section .note.GNU-stack, ""
  83. # End