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324 lines
5.0 KiB
324 lines
5.0 KiB
15 years ago
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#
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# synth_1to1 works the same way as the c version of this
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# file. only two types of changes have been made:
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# - reordered floating point instructions to
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# prevent pipline stalls
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# - made WRITE_SAMPLE use integer instead of
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# (slower) floating point
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# all kinds of x86 processors should benefit from these
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# modifications.
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#
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# useful sources of information on optimizing x86 code include:
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#
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# Intel Architecture Optimization Manual
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# http:#/www.intel.com/design/pentium/manuals/242816.htm
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#
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# Cyrix 6x86 Instruction Set Summary
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# ftp:#/ftp.cyrix.com/6x86/6x-dbch6.pdf
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#
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# AMD-K5 Processor Software Development
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# http:#/www.amd.com/products/cpg/techdocs/appnotes/20007e.pdf
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#
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# Stefan Bieschewski <stb@acm.org>
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#
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# You can use this part under GPL.
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#
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# $Id$
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#
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.bss
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.comm buffs,4352,4
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.data
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.align 4
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bo:
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.long 1
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.section .rodata
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.align 8
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.LC0:
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.long 0x0,0x40dfffc0
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.align 8
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.LC1:
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.long 0x0,0xc0e00000
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.align 8
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.text
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.globl synth_1to1_pent
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synth_1to1_pent:
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subl $12,%esp
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pushl %ebp
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pushl %edi
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pushl %esi
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pushl %ebx
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movl 32(%esp),%eax
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movl 40(%esp),%esi
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xorl %edi,%edi
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movl bo,%ebp
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cmpl %edi,36(%esp)
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jne .L48
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decl %ebp
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andl $15,%ebp
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movl %ebp,bo
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movl $buffs,%ecx
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jmp .L49
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.L48:
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addl $2,%esi
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movl $buffs+2176,%ecx
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.L49:
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testl $1,%ebp
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je .L50
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movl %ecx,%ebx
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movl %ebp,16(%esp)
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pushl %eax
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movl 20(%esp),%edx
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leal (%ebx,%edx,4),%eax
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pushl %eax
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movl 24(%esp),%eax
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incl %eax
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andl $15,%eax
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leal 1088(,%eax,4),%eax
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addl %ebx,%eax
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jmp .L74
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.L50:
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leal 1088(%ecx),%ebx
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leal 1(%ebp),%edx
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movl %edx,16(%esp)
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pushl %eax
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leal 1092(%ecx,%ebp,4),%eax
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pushl %eax
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leal (%ecx,%ebp,4),%eax
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.L74:
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pushl %eax
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call dct64
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addl $12,%esp
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movl 16(%esp),%edx
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leal 0(,%edx,4),%edx
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movl $decwin+64,%eax
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movl %eax,%ecx
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subl %edx,%ecx
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movl $16,%ebp
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.L55:
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flds (%ecx)
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fmuls (%ebx)
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flds 4(%ecx)
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fmuls 4(%ebx)
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fxch %st(1)
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flds 8(%ecx)
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fmuls 8(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 12(%ecx)
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fmuls 12(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 16(%ecx)
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fmuls 16(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 20(%ecx)
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fmuls 20(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 24(%ecx)
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fmuls 24(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 28(%ecx)
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fmuls 28(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 32(%ecx)
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fmuls 32(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 36(%ecx)
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fmuls 36(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 40(%ecx)
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fmuls 40(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 44(%ecx)
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fmuls 44(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 48(%ecx)
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fmuls 48(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 52(%ecx)
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fmuls 52(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 56(%ecx)
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fmuls 56(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds 60(%ecx)
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fmuls 60(%ebx)
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fxch %st(2)
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subl $4,%esp
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faddp %st,%st(1)
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fxch %st(1)
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fsubrp %st,%st(1)
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fistpl (%esp)
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popl %eax
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cmpl $32767,%eax
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jg 1f
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cmpl $-32768,%eax
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jl 2f
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movw %ax,(%esi)
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jmp 4f
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1: movw $32767,(%esi)
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jmp 3f
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2: movw $-32768,(%esi)
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3: incl %edi
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4:
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.L54:
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addl $64,%ebx
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subl $-128,%ecx
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addl $4,%esi
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decl %ebp
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jnz .L55
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flds (%ecx)
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fmuls (%ebx)
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flds 8(%ecx)
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fmuls 8(%ebx)
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flds 16(%ecx)
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fmuls 16(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 24(%ecx)
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fmuls 24(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 32(%ecx)
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fmuls 32(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 40(%ecx)
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fmuls 40(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 48(%ecx)
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fmuls 48(%ebx)
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fxch %st(2)
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faddp %st,%st(1)
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flds 56(%ecx)
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fmuls 56(%ebx)
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fxch %st(2)
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subl $4,%esp
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faddp %st,%st(1)
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fxch %st(1)
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faddp %st,%st(1)
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fistpl (%esp)
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popl %eax
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cmpl $32767,%eax
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jg 1f
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cmpl $-32768,%eax
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jl 2f
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movw %ax,(%esi)
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jmp 4f
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1: movw $32767,(%esi)
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jmp 3f
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2: movw $-32768,(%esi)
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3: incl %edi
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4:
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.L62:
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addl $-64,%ebx
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addl $4,%esi
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movl 16(%esp),%edx
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leal -128(%ecx,%edx,8),%ecx
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movl $15,%ebp
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.L68:
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flds -4(%ecx)
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fchs
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fmuls (%ebx)
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flds -8(%ecx)
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fmuls 4(%ebx)
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fxch %st(1)
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flds -12(%ecx)
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fmuls 8(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -16(%ecx)
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fmuls 12(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -20(%ecx)
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fmuls 16(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -24(%ecx)
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fmuls 20(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -28(%ecx)
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fmuls 24(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -32(%ecx)
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fmuls 28(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -36(%ecx)
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fmuls 32(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -40(%ecx)
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fmuls 36(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -44(%ecx)
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fmuls 40(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -48(%ecx)
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fmuls 44(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -52(%ecx)
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fmuls 48(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -56(%ecx)
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fmuls 52(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds -60(%ecx)
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fmuls 56(%ebx)
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fxch %st(2)
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fsubrp %st,%st(1)
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flds (%ecx)
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fmuls 60(%ebx)
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fxch %st(2)
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subl $4,%esp
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fsubrp %st,%st(1)
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fxch %st(1)
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fsubrp %st,%st(1)
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fistpl (%esp)
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popl %eax
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cmpl $32767,%eax
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jg 1f
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cmpl $-32768,%eax
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jl 2f
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movw %ax,(%esi)
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jmp 4f
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1: movw $32767,(%esi)
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jmp 3f
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2: movw $-32768,(%esi)
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3: incl %edi
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4:
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.L67:
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addl $-64,%ebx
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addl $-128,%ecx
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addl $4,%esi
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decl %ebp
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jnz .L68
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movl %edi,%eax
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popl %ebx
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popl %esi
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popl %edi
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popl %ebp
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addl $12,%esp
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ret
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