1da177e4c3
Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip!
42 lines
767 B
C
42 lines
767 B
C
#include <linux/types.h>
|
|
#include <linux/errno.h>
|
|
#include <asm/uaccess.h>
|
|
|
|
#include "soft-fp.h"
|
|
#include "double.h"
|
|
|
|
int
|
|
fsub(void *frD, void *frA, void *frB)
|
|
{
|
|
FP_DECL_D(A);
|
|
FP_DECL_D(B);
|
|
FP_DECL_D(R);
|
|
int ret = 0;
|
|
|
|
#ifdef DEBUG
|
|
printk("%s: %p %p %p\n", __FUNCTION__, frD, frA, frB);
|
|
#endif
|
|
|
|
__FP_UNPACK_D(A, frA);
|
|
__FP_UNPACK_D(B, frB);
|
|
|
|
#ifdef DEBUG
|
|
printk("A: %ld %lu %lu %ld (%ld)\n", A_s, A_f1, A_f0, A_e, A_c);
|
|
printk("B: %ld %lu %lu %ld (%ld)\n", B_s, B_f1, B_f0, B_e, B_c);
|
|
#endif
|
|
|
|
if (B_c != FP_CLS_NAN)
|
|
B_s ^= 1;
|
|
|
|
if (A_s != B_s && A_c == FP_CLS_INF && B_c == FP_CLS_INF)
|
|
ret |= EFLAG_VXISI;
|
|
|
|
FP_ADD_D(R, A, B);
|
|
|
|
#ifdef DEBUG
|
|
printk("D: %ld %lu %lu %ld (%ld)\n", R_s, R_f1, R_f0, R_e, R_c);
|
|
#endif
|
|
|
|
return (ret | __FP_PACK_D(frD, R));
|
|
}
|