diff options
author | Paul Mackerras <paulus@samba.org> | 2006-03-28 17:03:19 +1100 |
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committer | Paul Mackerras <paulus@samba.org> | 2006-03-28 17:03:19 +1100 |
commit | cf66c897d7fa07f57452b1a369aec37d97b11e31 (patch) | |
tree | eb74b71c2ff288f4d77423bb7e54c3c55ef08bf9 /arch/powerpc/math-emu/fcmpu.c | |
parent | facee873de8da5fe709c194f98eb0f2cc642a38c (diff) | |
parent | 78af90629ce98c8383ea16928e110eb97b889be6 (diff) |
Merge branch '85xx' of git://git.kernel.org/pub/scm/linux/kernel/git/galak/powerpc
Diffstat (limited to 'arch/powerpc/math-emu/fcmpu.c')
-rw-r--r-- | arch/powerpc/math-emu/fcmpu.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/arch/powerpc/math-emu/fcmpu.c b/arch/powerpc/math-emu/fcmpu.c new file mode 100644 index 00000000000..b7e33176e61 --- /dev/null +++ b/arch/powerpc/math-emu/fcmpu.c @@ -0,0 +1,42 @@ +#include <linux/types.h> +#include <linux/errno.h> +#include <asm/uaccess.h> + +#include "soft-fp.h" +#include "double.h" + +int +fcmpu(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; + +#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 + + 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 0; +} |