trunc_gen.S 3.4 KB

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  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 "trunc_gen.c"
  38. .text
  39. ..TXTST0:
  40. # -- Begin trunc
  41. .text
  42. .align 16,0x90
  43. .globl trunc
  44. trunc:
  45. # parameter 1: %xmm0
  46. ..B1.1:
  47. .cfi_startproc
  48. ..___tag_value_trunc.1:
  49. ..L2:
  50. movsd %xmm0, -8(%rsp)
  51. movl -4(%rsp), %edx
  52. movl %edx, %eax
  53. andl $2147483647, %eax
  54. addl $-1072693248, %eax
  55. cmpl $54525952, %eax
  56. jae ..B1.6
  57. ..B1.2:
  58. movl %eax, %ecx
  59. shrl $20, %ecx
  60. cmpl $22020096, %eax
  61. jae ..B1.4
  62. ..B1.3:
  63. negl %ecx
  64. movl $-1, %eax
  65. addl $20, %ecx
  66. shll %cl, %eax
  67. andl %eax, %edx
  68. movl %edx, -4(%rsp)
  69. movl $0, -8(%rsp)
  70. movsd -8(%rsp), %xmm0
  71. ret
  72. ..B1.4:
  73. negl %ecx
  74. movl $-1, %eax
  75. addl $20, %ecx
  76. shll %cl, %eax
  77. andl %eax, -8(%rsp)
  78. movsd -8(%rsp), %xmm0
  79. ..B1.5:
  80. ret
  81. ..B1.6:
  82. testl %eax, %eax
  83. jl ..B1.9
  84. ..B1.7:
  85. lea _ones(%rip), %rax
  86. movsd -8(%rsp), %xmm0
  87. mulsd (%rax), %xmm0
  88. ..B1.8:
  89. ret
  90. ..B1.9:
  91. lea _zeros(%rip), %rax
  92. shrl $31, %edx
  93. movsd (%rax,%rdx,8), %xmm0
  94. ret
  95. .align 16,0x90
  96. .cfi_endproc
  97. .type trunc,@function
  98. .size trunc,.-trunc
  99. .data
  100. # -- End trunc
  101. .section .rodata, "a"
  102. .align 4
  103. .align 4
  104. _ones:
  105. .long 0
  106. .long 1072693248
  107. .long 0
  108. .long 3220176896
  109. .type _ones,@object
  110. .size _ones,16
  111. .align 4
  112. _zeros:
  113. .long 0
  114. .long 0
  115. .long 0
  116. .long 2147483648
  117. .type _zeros,@object
  118. .size _zeros,16
  119. .data
  120. .section .note.GNU-stack, ""
  121. // -- Begin DWARF2 SEGMENT .eh_frame
  122. .section .eh_frame,"a",@progbits
  123. .eh_frame_seg:
  124. .align 1
  125. # End