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| author | Steven Whitehouse <swhiteho@redhat.com> | 2006-03-31 15:34:58 -0500 |
|---|---|---|
| committer | Steven Whitehouse <swhiteho@redhat.com> | 2006-03-31 15:34:58 -0500 |
| commit | 86579dd06deecfa6ac88d5e84e4d63c397cd6f6d (patch) | |
| tree | b4475d3ccde53015ad84a06e4e55e64591171b75 /arch/powerpc/math-emu/fcmpo.c | |
| parent | 7ea9ea832212c4a755650f7c7cc1ff0b63292a41 (diff) | |
| parent | a0f067802576d4eb4c65d40b8ee7d6ea3c81dd61 (diff) | |
| download | linux-stable-86579dd06deecfa6ac88d5e84e4d63c397cd6f6d.tar.gz linux-stable-86579dd06deecfa6ac88d5e84e4d63c397cd6f6d.tar.bz2 linux-stable-86579dd06deecfa6ac88d5e84e4d63c397cd6f6d.zip | |
Merge branch 'master'
Diffstat (limited to 'arch/powerpc/math-emu/fcmpo.c')
| -rw-r--r-- | arch/powerpc/math-emu/fcmpo.c | 46 |
1 files changed, 46 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/fcmpo.c b/arch/powerpc/math-emu/fcmpo.c new file mode 100644 index 000000000000..4efac394b4cb --- /dev/null +++ b/arch/powerpc/math-emu/fcmpo.c @@ -0,0 +1,46 @@ +#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 %p\n", __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: %08x\n", *ccr); +#endif + + return ret; +} |