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muldi3.S

muldi3.S 920 B
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  1. /*
    2. 

  2.  *  linux/arch/arm/lib/muldi3.S
    3. 

  3.  *
    4. 

  4.  *  Author:     Nicolas Pitre
    5. 

  5.  *  Created:    Oct 19, 2005
    6. 

  6.  *  Copyright:  Monta Vista Software, Inc.
    7. 

  7.  *
    8. 

  8.  *  This program is free software; you can redistribute it and/or modify
    9. 

  9.  *  it under the terms of the GNU General Public License version 2 as
    10. 

  10.  *  published by the Free Software Foundation.
    11. 

  11.  */
    12. 

  12. 

  13. #include <linux/linkage.h>
    14. 

  14. #include <asm/assembler.h>
    15. 

  15. 

  16. #ifdef __ARMEB__
    17. 

  17. #define xh r0
    18. 

  18. #define xl r1
    19. 

  19. #define yh r2
    20. 

  20. #define yl r3
    21. 

  21. #else
    22. 

  22. #define xl r0
    23. 

  23. #define xh r1
    24. 

  24. #define yl r2
    25. 

  25. #define yh r3
    26. 

  26. #endif
    27. 

  27. 

  28. ENTRY(__muldi3)
    29. 

  29. ENTRY(__aeabi_lmul)
    30. 

  30. 

  31. 	mul	xh, yl, xh
    32. 

  32. 	mla	xh, xl, yh, xh
    33. 

  33. 	mov	ip, xl, lsr #16
    34. 

  34. 	mov	yh, yl, lsr #16
    35. 

  35. 	bic	xl, xl, ip, lsl #16
    36. 

  36. 	bic	yl, yl, yh, lsl #16
    37. 

  37. 	mla	xh, yh, ip, xh
    38. 

  38. 	mul	yh, xl, yh
    39. 

  39. 	mul	xl, yl, xl
    40. 

  40. 	mul	ip, yl, ip
    41. 

  41. 	adds	xl, xl, yh, lsl #16
    42. 

  42. 	adc	xh, xh, yh, lsr #16
    43. 

  43. 	adds	xl, xl, ip, lsl #16
    44. 

  44. 	adc	xh, xh, ip, lsr #16
    45. 

  45. 	ret	lr
    46. 

  46. 

  47. ENDPROC(__muldi3)
    48. 

  48. ENDPROC(__aeabi_lmul)
    49. 

  49.