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bd6be579a7
Functions in math-emu are annotated as ENTRY() symbols, but their
ends are not annotated at all. But these are standard functions
called from C, with proper stack register update etc.
Omitting the ends means:
* the annotations are not paired and we cannot deal with such functions
e.g. in objtool
* the symbols are not marked as functions in the object file
* there are no sizes of the functions in the object file
So fix this by adding ENDPROC() to each such case in math-emu.
Signed-off-by: Jiri Slaby <jslaby@suse.cz>
Cc: Andy Lutomirski <luto@kernel.org>
Cc: Borislav Petkov <bp@alien8.de>
Cc: Brian Gerst <brgerst@gmail.com>
Cc: Denys Vlasenko <dvlasenk@redhat.com>
Cc: H. Peter Anvin <hpa@zytor.com>
Cc: Josh Poimboeuf <jpoimboe@redhat.com>
Cc: Linus Torvalds <torvalds@linux-foundation.org>
Cc: Peter Zijlstra <peterz@infradead.org>
Cc: Thomas Gleixner <tglx@linutronix.de>
Link: http://lkml.kernel.org/r/20170824080624.7768-1-jslaby@suse.cz
Signed-off-by: Ingo Molnar <mingo@kernel.org>
142 lines
3.3 KiB
ArmAsm
142 lines
3.3 KiB
ArmAsm
/*---------------------------------------------------------------------------+
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| round_Xsig.S |
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| Copyright (C) 1992,1993,1994,1995 |
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| W. Metzenthen, 22 Parker St, Ormond, Vic 3163, |
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| Australia. E-mail billm@jacobi.maths.monash.edu.au |
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| Normalize and round a 12 byte quantity. |
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| Call from C as: |
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| int round_Xsig(Xsig *n) |
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| Normalize a 12 byte quantity. |
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| Call from C as: |
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| int norm_Xsig(Xsig *n) |
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| Each function returns the size of the shift (nr of bits). |
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+---------------------------------------------------------------------------*/
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.file "round_Xsig.S"
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#include "fpu_emu.h"
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.text
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ENTRY(round_Xsig)
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pushl %ebp
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movl %esp,%ebp
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pushl %ebx /* Reserve some space */
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pushl %ebx
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pushl %esi
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movl PARAM1,%esi
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movl 8(%esi),%edx
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movl 4(%esi),%ebx
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movl (%esi),%eax
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movl $0,-4(%ebp)
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orl %edx,%edx /* ms bits */
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js L_round /* Already normalized */
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jnz L_shift_1 /* Shift left 1 - 31 bits */
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movl %ebx,%edx
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movl %eax,%ebx
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xorl %eax,%eax
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movl $-32,-4(%ebp)
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/* We need to shift left by 1 - 31 bits */
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L_shift_1:
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bsrl %edx,%ecx /* get the required shift in %ecx */
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subl $31,%ecx
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negl %ecx
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subl %ecx,-4(%ebp)
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shld %cl,%ebx,%edx
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shld %cl,%eax,%ebx
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shl %cl,%eax
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L_round:
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testl $0x80000000,%eax
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jz L_exit
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addl $1,%ebx
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adcl $0,%edx
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jnz L_exit
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movl $0x80000000,%edx
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incl -4(%ebp)
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L_exit:
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movl %edx,8(%esi)
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movl %ebx,4(%esi)
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movl %eax,(%esi)
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movl -4(%ebp),%eax
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popl %esi
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popl %ebx
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leave
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ret
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ENDPROC(round_Xsig)
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ENTRY(norm_Xsig)
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pushl %ebp
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movl %esp,%ebp
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pushl %ebx /* Reserve some space */
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pushl %ebx
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pushl %esi
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movl PARAM1,%esi
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movl 8(%esi),%edx
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movl 4(%esi),%ebx
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movl (%esi),%eax
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movl $0,-4(%ebp)
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orl %edx,%edx /* ms bits */
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js L_n_exit /* Already normalized */
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jnz L_n_shift_1 /* Shift left 1 - 31 bits */
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movl %ebx,%edx
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movl %eax,%ebx
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xorl %eax,%eax
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movl $-32,-4(%ebp)
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orl %edx,%edx /* ms bits */
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js L_n_exit /* Normalized now */
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jnz L_n_shift_1 /* Shift left 1 - 31 bits */
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movl %ebx,%edx
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movl %eax,%ebx
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xorl %eax,%eax
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addl $-32,-4(%ebp)
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jmp L_n_exit /* Might not be normalized,
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but shift no more. */
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/* We need to shift left by 1 - 31 bits */
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L_n_shift_1:
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bsrl %edx,%ecx /* get the required shift in %ecx */
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subl $31,%ecx
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negl %ecx
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subl %ecx,-4(%ebp)
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shld %cl,%ebx,%edx
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shld %cl,%eax,%ebx
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shl %cl,%eax
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L_n_exit:
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movl %edx,8(%esi)
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movl %ebx,4(%esi)
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movl %eax,(%esi)
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movl -4(%ebp),%eax
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popl %esi
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popl %ebx
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leave
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ret
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ENDPROC(norm_Xsig)
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