diff options
author | Ben Dooks <ben-linux@fluff.org> | 2008-10-21 11:12:00 +0100 |
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committer | Ben Dooks <ben-linux@fluff.org> | 2008-10-21 11:12:00 +0100 |
commit | c3380942e6699ed5b3e3f37b49ceb724b7699813 (patch) | |
tree | 516d791cdfd1c7f99a29f71e1a7bba8f75af96e1 /arch/sh/kernel/cpu/sh4/fpu.c | |
parent | 0ffda6cca2c66e42d0ad65719f58c637ed180b05 (diff) | |
parent | 2515ddc6db8eb49a79f0fe5e67ff09ac7c81eab4 (diff) |
Merge branch 'master' of git://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux-2.6 into s3c64xx
Diffstat (limited to 'arch/sh/kernel/cpu/sh4/fpu.c')
-rw-r--r-- | arch/sh/kernel/cpu/sh4/fpu.c | 25 |
1 files changed, 24 insertions, 1 deletions
diff --git a/arch/sh/kernel/cpu/sh4/fpu.c b/arch/sh/kernel/cpu/sh4/fpu.c index 2d452f67fb8..2780917c008 100644 --- a/arch/sh/kernel/cpu/sh4/fpu.c +++ b/arch/sh/kernel/cpu/sh4/fpu.c @@ -36,7 +36,7 @@ extern unsigned long int float32_add(unsigned long int a, unsigned long int b); extern unsigned long long float64_sub(unsigned long long a, unsigned long long b); extern unsigned long int float32_sub(unsigned long int a, unsigned long int b); - +extern unsigned long int float64_to_float32(unsigned long long a); static unsigned int fpu_exception_flags; /* @@ -417,6 +417,29 @@ static int ieee_fpe_handler(struct pt_regs *regs) regs->pc = nextpc; return 1; + } else if ((finsn & 0xf0bd) == 0xf0bd) { + /* fcnvds - double to single precision convert */ + struct task_struct *tsk = current; + int m; + unsigned int hx; + + m = (finsn >> 9) & 0x7; + hx = tsk->thread.fpu.hard.fp_regs[m]; + + if ((tsk->thread.fpu.hard.fpscr & FPSCR_CAUSE_ERROR) + && ((hx & 0x7fffffff) < 0x00100000)) { + /* subnormal double to float conversion */ + long long llx; + + llx = ((long long)tsk->thread.fpu.hard.fp_regs[m] << 32) + | tsk->thread.fpu.hard.fp_regs[m + 1]; + + tsk->thread.fpu.hard.fpul = float64_to_float32(llx); + } else + return 0; + + regs->pc = nextpc; + return 1; } return 0; |