fcmpo.c
上传用户:lgb322
上传日期:2013-02-24
资源大小:30529k
文件大小:1k
- /*
- * BK Id: SCCS/s.fcmpo.c 1.6 05/17/01 18:14:22 cort
- */
- #include <linux/types.h>
- #include <linux/errno.h>
- #include <asm/uaccess.h>
- #include "soft-fp.h"
- #include "double.h"
- int
- fcmpo(u32 *ccr, int crfD, void *frA, void *frB)
- {
- FP_DECL_D(A);
- FP_DECL_D(B);
- int code[4] = { (1 << 3), (1 << 1), (1 << 2), (1 << 0) };
- long cmp;
- int ret = 0;
- #ifdef DEBUG
- printk("%s: %p (%08x) %d %p %pn", __FUNCTION__, ccr, *ccr, crfD, 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 (A_c == FP_CLS_NAN || B_c == FP_CLS_NAN)
- ret |= EFLAG_VXVC;
- FP_CMP_D(cmp, A, B, 2);
- cmp = code[(cmp + 1) & 3];
- __FPU_FPSCR &= ~(0x1f000);
- __FPU_FPSCR |= (cmp << 12);
- *ccr &= ~(15 << ((7 - crfD) << 2));
- *ccr |= (cmp << ((7 - crfD) << 2));
-
- #ifdef DEBUG
- printk("CR: %08xn", *ccr);
- #endif
- return ret;
- }