fcmpo.c 972 B

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  1. #include <linux/types.h>
  2. #include <linux/errno.h>
  3. #include <asm/uaccess.h>
  4. #include <asm/sfp-machine.h>
  5. #include <math-emu/soft-fp.h>
  6. #include <math-emu/double.h>
  7. int
  8. fcmpo(u32 *ccr, int crfD, void *frA, void *frB)
  9. {
  10. FP_DECL_D(A);
  11. FP_DECL_D(B);
  12. FP_DECL_EX;
  13. int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
  14. long cmp;
  15. #ifdef DEBUG
  16. printk("%s: %p (%08x) %d %p %p\n", __func__, ccr, *ccr, crfD, frA, frB);
  17. #endif
  18. FP_UNPACK_DP(A, frA);
  19. FP_UNPACK_DP(B, frB);
  20. #ifdef DEBUG
  21. printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
  22. printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
  23. #endif
  24. if (A_c == FP_CLS_NAN || B_c == FP_CLS_NAN)
  25. FP_SET_EXCEPTION(EFLAG_VXVC);
  26. FP_CMP_D(cmp, A, B, 2);
  27. cmp = code[(cmp + 1) & 3];
  28. __FPU_FPSCR &= ~(0x1f000);
  29. __FPU_FPSCR |= (cmp << 12);
  30. *ccr &= ~(15 << ((7 - crfD) << 2));
  31. *ccr |= (cmp << ((7 - crfD) << 2));
  32. #ifdef DEBUG
  33. printk("CR: %08x\n", *ccr);
  34. #endif
  35. return FP_CUR_EXCEPTIONS;
  36. }