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author | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 09:16:31 (GMT) |
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committer | Thomas Gleixner <tglx@linutronix.de> | 2007-10-11 09:16:31 (GMT) |
commit | da957e111bb0c189a4a3bf8a00caaecb59ed94ca (patch) | |
tree | 6916075fdd3e28869dcd3dfa2cf160a74d1cb02e /arch/x86/math-emu/mul_Xsig.S | |
parent | 2ec1df4130c60d1eb49dc0fa0ed15858fede6b05 (diff) | |
download | linux-da957e111bb0c189a4a3bf8a00caaecb59ed94ca.tar.xz |
i386: move math-emu
Signed-off-by: Thomas Gleixner <tglx@linutronix.de>
Signed-off-by: Ingo Molnar <mingo@elte.hu>
Diffstat (limited to 'arch/x86/math-emu/mul_Xsig.S')
-rw-r--r-- | arch/x86/math-emu/mul_Xsig.S | 176 |
1 files changed, 176 insertions, 0 deletions
diff --git a/arch/x86/math-emu/mul_Xsig.S b/arch/x86/math-emu/mul_Xsig.S new file mode 100644 index 0000000..717785a --- /dev/null +++ b/arch/x86/math-emu/mul_Xsig.S @@ -0,0 +1,176 @@ +/*---------------------------------------------------------------------------+ + | mul_Xsig.S | + | | + | Multiply a 12 byte fixed point number by another fixed point number. | + | | + | Copyright (C) 1992,1994,1995 | + | W. Metzenthen, 22 Parker St, Ormond, Vic 3163, | + | Australia. E-mail billm@jacobi.maths.monash.edu.au | + | | + | Call from C as: | + | void mul32_Xsig(Xsig *x, unsigned b) | + | | + | void mul64_Xsig(Xsig *x, unsigned long long *b) | + | | + | void mul_Xsig_Xsig(Xsig *x, unsigned *b) | + | | + | The result is neither rounded nor normalized, and the ls bit or so may | + | be wrong. | + | | + +---------------------------------------------------------------------------*/ + .file "mul_Xsig.S" + + +#include "fpu_emu.h" + +.text +ENTRY(mul32_Xsig) + pushl %ebp + movl %esp,%ebp + subl $16,%esp + pushl %esi + + movl PARAM1,%esi + movl PARAM2,%ecx + + xor %eax,%eax + movl %eax,-4(%ebp) + movl %eax,-8(%ebp) + + movl (%esi),%eax /* lsl of Xsig */ + mull %ecx /* msl of b */ + movl %edx,-12(%ebp) + + movl 4(%esi),%eax /* midl of Xsig */ + mull %ecx /* msl of b */ + addl %eax,-12(%ebp) + adcl %edx,-8(%ebp) + adcl $0,-4(%ebp) + + movl 8(%esi),%eax /* msl of Xsig */ + mull %ecx /* msl of b */ + addl %eax,-8(%ebp) + adcl %edx,-4(%ebp) + + movl -12(%ebp),%eax + movl %eax,(%esi) + movl -8(%ebp),%eax + movl %eax,4(%esi) + movl -4(%ebp),%eax + movl %eax,8(%esi) + + popl %esi + leave + ret + + +ENTRY(mul64_Xsig) + pushl %ebp + movl %esp,%ebp + subl $16,%esp + pushl %esi + + movl PARAM1,%esi + movl PARAM2,%ecx + + xor %eax,%eax + movl %eax,-4(%ebp) + movl %eax,-8(%ebp) + + movl (%esi),%eax /* lsl of Xsig */ + mull 4(%ecx) /* msl of b */ + movl %edx,-12(%ebp) + + movl 4(%esi),%eax /* midl of Xsig */ + mull (%ecx) /* lsl of b */ + addl %edx,-12(%ebp) + adcl $0,-8(%ebp) + adcl $0,-4(%ebp) + + movl 4(%esi),%eax /* midl of Xsig */ + mull 4(%ecx) /* msl of b */ + addl %eax,-12(%ebp) + adcl %edx,-8(%ebp) + adcl $0,-4(%ebp) + + movl 8(%esi),%eax /* msl of Xsig */ + mull (%ecx) /* lsl of b */ + addl %eax,-12(%ebp) + adcl %edx,-8(%ebp) + adcl $0,-4(%ebp) + + movl 8(%esi),%eax /* msl of Xsig */ + mull 4(%ecx) /* msl of b */ + addl %eax,-8(%ebp) + adcl %edx,-4(%ebp) + + movl -12(%ebp),%eax + movl %eax,(%esi) + movl -8(%ebp),%eax + movl %eax,4(%esi) + movl -4(%ebp),%eax + movl %eax,8(%esi) + + popl %esi + leave + ret + + + +ENTRY(mul_Xsig_Xsig) + pushl %ebp + movl %esp,%ebp + subl $16,%esp + pushl %esi + + movl PARAM1,%esi + movl PARAM2,%ecx + + xor %eax,%eax + movl %eax,-4(%ebp) + movl %eax,-8(%ebp) + + movl (%esi),%eax /* lsl of Xsig */ + mull 8(%ecx) /* msl of b */ + movl %edx,-12(%ebp) + + movl 4(%esi),%eax /* midl of Xsig */ + mull 4(%ecx) /* midl of b */ + addl %edx,-12(%ebp) + adcl $0,-8(%ebp) + adcl $0,-4(%ebp) + + movl 8(%esi),%eax /* msl of Xsig */ + mull (%ecx) /* lsl of b */ + addl %edx,-12(%ebp) + adcl $0,-8(%ebp) + adcl $0,-4(%ebp) + + movl 4(%esi),%eax /* midl of Xsig */ + mull 8(%ecx) /* msl of b */ + addl %eax,-12(%ebp) + adcl %edx,-8(%ebp) + adcl $0,-4(%ebp) + + movl 8(%esi),%eax /* msl of Xsig */ + mull 4(%ecx) /* midl of b */ + addl %eax,-12(%ebp) + adcl %edx,-8(%ebp) + adcl $0,-4(%ebp) + + movl 8(%esi),%eax /* msl of Xsig */ + mull 8(%ecx) /* msl of b */ + addl %eax,-8(%ebp) + adcl %edx,-4(%ebp) + + movl -12(%ebp),%edx + movl %edx,(%esi) + movl -8(%ebp),%edx + movl %edx,4(%esi) + movl -4(%ebp),%edx + movl %edx,8(%esi) + + popl %esi + leave + ret + |