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-rw-r--r--mp3lib/decode_i586.s321
1 files changed, 321 insertions, 0 deletions
diff --git a/mp3lib/decode_i586.s b/mp3lib/decode_i586.s
new file mode 100644
index 0000000000..a4dc904071
--- /dev/null
+++ b/mp3lib/decode_i586.s
@@ -0,0 +1,321 @@
+/
+/ mpg123_synth_1to1 works the same way as the c version of this
+/ file. only two types of changes have been made:
+/ - reordered floating point instructions to
+/ prevent pipline stalls
+/ - made WRITE_SAMPLE use integer instead of
+/ (slower) floating point
+/ all kinds of x86 processors should benefit from these
+/ modifications.
+/
+/ useful sources of information on optimizing x86 code include:
+/
+/ Intel Architecture Optimization Manual
+/ http://www.intel.com/design/pentium/manuals/242816.htm
+/
+/ Cyrix 6x86 Instruction Set Summary
+/ ftp://ftp.cyrix.com/6x86/6x-dbch6.pdf
+/
+/ AMD-K5 Processor Software Development
+/ http://www.amd.com/products/cpg/techdocs/appnotes/20007e.pdf
+/
+/ Stefan Bieschewski <stb@acm.org>
+/
+/ $Id$
+/
+.bss
+ .comm buffs,4352,4
+.data
+ .align 4
+bo:
+ .long 1
+.section .rodata
+ .align 8
+.LC0:
+ .long 0x0,0x40dfffc0
+ .align 8
+.LC1:
+ .long 0x0,0xc0e00000
+ .align 8
+.text
+.globl synth_1to1_pent
+synth_1to1_pent:
+ subl $12,%esp
+ pushl %ebp
+ pushl %edi
+ pushl %esi
+ pushl %ebx
+ movl 32(%esp),%eax
+ movl 40(%esp),%esi
+ xorl %edi,%edi
+ movl bo,%ebp
+ cmpl %edi,36(%esp)
+ jne .L48
+ decl %ebp
+ andl $15,%ebp
+ movl %ebp,bo
+ movl $buffs,%ecx
+ jmp .L49
+.L48:
+ addl $2,%esi
+ movl $buffs+2176,%ecx
+.L49:
+ testl $1,%ebp
+ je .L50
+ movl %ecx,%ebx
+ movl %ebp,16(%esp)
+ pushl %eax
+ movl 20(%esp),%edx
+ leal (%ebx,%edx,4),%eax
+ pushl %eax
+ movl 24(%esp),%eax
+ incl %eax
+ andl $15,%eax
+ leal 1088(,%eax,4),%eax
+ addl %ebx,%eax
+ jmp .L74
+.L50:
+ leal 1088(%ecx),%ebx
+ leal 1(%ebp),%edx
+ movl %edx,16(%esp)
+ pushl %eax
+ leal 1092(%ecx,%ebp,4),%eax
+ pushl %eax
+ leal (%ecx,%ebp,4),%eax
+.L74:
+ pushl %eax
+ call dct64
+ addl $12,%esp
+ movl 16(%esp),%edx
+ leal 0(,%edx,4),%edx
+ movl $decwin+64,%eax
+ movl %eax,%ecx
+ subl %edx,%ecx
+ movl $16,%ebp
+.L55:
+ flds (%ecx)
+ fmuls (%ebx)
+ flds 4(%ecx)
+ fmuls 4(%ebx)
+ fxch %st(1)
+ flds 8(%ecx)
+ fmuls 8(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 12(%ecx)
+ fmuls 12(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 16(%ecx)
+ fmuls 16(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 20(%ecx)
+ fmuls 20(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 24(%ecx)
+ fmuls 24(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 28(%ecx)
+ fmuls 28(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 32(%ecx)
+ fmuls 32(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 36(%ecx)
+ fmuls 36(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 40(%ecx)
+ fmuls 40(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 44(%ecx)
+ fmuls 44(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 48(%ecx)
+ fmuls 48(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 52(%ecx)
+ fmuls 52(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 56(%ecx)
+ fmuls 56(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds 60(%ecx)
+ fmuls 60(%ebx)
+ fxch %st(2)
+ subl $4,%esp
+ faddp %st,%st(1)
+ fxch %st(1)
+ fsubrp %st,%st(1)
+ fistpl (%esp)
+ popl %eax
+ cmpl $32767,%eax
+ jg 1f
+ cmpl $-32768,%eax
+ jl 2f
+ movw %ax,(%esi)
+ jmp 4f
+1: movw $32767,(%esi)
+ jmp 3f
+2: movw $-32768,(%esi)
+3: incl %edi
+4:
+.L54:
+ addl $64,%ebx
+ subl $-128,%ecx
+ addl $4,%esi
+ decl %ebp
+ jnz .L55
+ flds (%ecx)
+ fmuls (%ebx)
+ flds 8(%ecx)
+ fmuls 8(%ebx)
+ flds 16(%ecx)
+ fmuls 16(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 24(%ecx)
+ fmuls 24(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 32(%ecx)
+ fmuls 32(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 40(%ecx)
+ fmuls 40(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 48(%ecx)
+ fmuls 48(%ebx)
+ fxch %st(2)
+ faddp %st,%st(1)
+ flds 56(%ecx)
+ fmuls 56(%ebx)
+ fxch %st(2)
+ subl $4,%esp
+ faddp %st,%st(1)
+ fxch %st(1)
+ faddp %st,%st(1)
+ fistpl (%esp)
+ popl %eax
+ cmpl $32767,%eax
+ jg 1f
+ cmpl $-32768,%eax
+ jl 2f
+ movw %ax,(%esi)
+ jmp 4f
+1: movw $32767,(%esi)
+ jmp 3f
+2: movw $-32768,(%esi)
+3: incl %edi
+4:
+.L62:
+ addl $-64,%ebx
+ addl $4,%esi
+ movl 16(%esp),%edx
+ leal -128(%ecx,%edx,8),%ecx
+ movl $15,%ebp
+.L68:
+ flds -4(%ecx)
+ fchs
+ fmuls (%ebx)
+ flds -8(%ecx)
+ fmuls 4(%ebx)
+ fxch %st(1)
+ flds -12(%ecx)
+ fmuls 8(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -16(%ecx)
+ fmuls 12(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -20(%ecx)
+ fmuls 16(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -24(%ecx)
+ fmuls 20(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -28(%ecx)
+ fmuls 24(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -32(%ecx)
+ fmuls 28(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -36(%ecx)
+ fmuls 32(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -40(%ecx)
+ fmuls 36(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -44(%ecx)
+ fmuls 40(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -48(%ecx)
+ fmuls 44(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -52(%ecx)
+ fmuls 48(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -56(%ecx)
+ fmuls 52(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds -60(%ecx)
+ fmuls 56(%ebx)
+ fxch %st(2)
+ fsubrp %st,%st(1)
+ flds (%ecx)
+ fmuls 60(%ebx)
+ fxch %st(2)
+ subl $4,%esp
+ fsubrp %st,%st(1)
+ fxch %st(1)
+ fsubrp %st,%st(1)
+ fistpl (%esp)
+ popl %eax
+ cmpl $32767,%eax
+ jg 1f
+ cmpl $-32768,%eax
+ jl 2f
+ movw %ax,(%esi)
+ jmp 4f
+1: movw $32767,(%esi)
+ jmp 3f
+2: movw $-32768,(%esi)
+3: incl %edi
+4:
+.L67:
+ addl $-64,%ebx
+ addl $-128,%ecx
+ addl $4,%esi
+ decl %ebp
+ jnz .L68
+ movl %edi,%eax
+ popl %ebx
+ popl %esi
+ popl %edi
+ popl %ebp
+ addl $12,%esp
+ ret
+
generated by cgit v1.2.3 (git 2.25.1) at 2024-04-20 07:07:16 +0000