From 87f5a56dfeffa0811d5725f287622bd9d57d3610 Mon Sep 17 00:00:00 2001
From: Josh Coalson <jcoalson@users.sourceforce.net>
Date: Thu, 3 May 2001 03:40:09 +0000
Subject: [PATCH] initial import

---
 src/libFLAC/i386/lpc_asm.nasm | 94 +++++++++++++++++++++++++++++++++++
 src/libFLAC/i386/nasm.h       | 51 +++++++++++++++++++
 2 files changed, 145 insertions(+)
 create mode 100644 src/libFLAC/i386/lpc_asm.nasm
 create mode 100644 src/libFLAC/i386/nasm.h

diff --git a/src/libFLAC/i386/lpc_asm.nasm b/src/libFLAC/i386/lpc_asm.nasm
new file mode 100644
index 00000000..178d1be7
--- /dev/null
+++ b/src/libFLAC/i386/lpc_asm.nasm
@@ -0,0 +1,94 @@
+; libFLAC - Free Lossless Audio Codec library
+; Copyright (C) 2001  Josh Coalson
+;
+; This library is free software; you can redistribute it and/or
+; modify it under the terms of the GNU Library General Public
+; License as published by the Free Software Foundation; either
+; version 2 of the License, or (at your option) any later version.
+;
+; This library is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; Library General Public License for more details.
+;
+; You should have received a copy of the GNU Library General Public
+; License along with this library; if not, write to the
+; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+; Boston, MA  02111-1307, USA.
+
+%include "nasm.h"
+
+	data_section
+
+cglobal FLAC__lpc_compute_autocorrelation_asm
+
+	code_section
+
+; **********************************************************************
+;
+; void FLAC__lpc_compute_autocorrelation_asm(const real data[], unsigned data_len, unsigned lag, real autoc[])
+;
+FLAC__lpc_compute_autocorrelation_asm:
+
+	push	ebp
+	lea	ebp, [esp + 8]
+	push	eax
+	push	ebx
+	push	ecx
+	push	edx
+	push	esi
+	push	edi
+
+	mov	esi, [ebp]			; esi == data
+	mov	ecx, [ebp + 4]			; ecx == data_len
+	mov	edx, [ebp + 8]			; edx == lag
+	mov	edi, [ebp + 12]			; edi == autoc
+
+.outer_loop:
+	test	edx, edx
+	jz	.outer_end
+	dec	edx				; lag--
+
+	mov	ebx, edx			; ebx == i <- lag
+	xor	eax, eax			; eax == i-lag
+	fldz					; ST = d <- 0.0
+.inner_loop:
+	cmp	ebx, ecx
+	jae	short .inner_end
+	fld	qword [esi + ebx * 8]		; ST = data[i] d
+	fmul	qword [esi + eax * 8]		; ST = data[i]*data[i-lag] d
+	faddp	st1				; d += data[i]*data[i-lag]  ST = d
+	inc	eax
+	inc	ebx
+	jmp	.inner_loop
+.inner_end:
+
+	fstp	qword [edi + edx * 8]
+
+	jmp	.outer_loop
+.outer_end:
+
+	pop	edi
+	pop	esi
+	pop	edx
+	pop	ecx
+	pop	ebx
+	pop	eax
+	pop	ebp
+	ret
+
+end
+;	void FLAC__lpc_compute_autocorrelation_asm(const real data[], unsigned data_len, unsigned lag, real autoc[])
+;	{
+;		real d;
+;		unsigned i;
+;	
+;		assert(lag > 0);
+;		assert(lag <= data_len);
+;	
+;		while(lag--) {
+;			for(i = lag, d = 0.0; i < data_len; i++)
+;				d += data[i] * data[i - lag];
+;			autoc[lag] = d;
+;		}
+;	}
diff --git a/src/libFLAC/i386/nasm.h b/src/libFLAC/i386/nasm.h
new file mode 100644
index 00000000..c613a8ca
--- /dev/null
+++ b/src/libFLAC/i386/nasm.h
@@ -0,0 +1,51 @@
+; libFLAC - Free Lossless Audio Codec library
+; Copyright (C) 2001  Josh Coalson
+;
+; This library is free software; you can redistribute it and/or
+; modify it under the terms of the GNU Library General Public
+; License as published by the Free Software Foundation; either
+; version 2 of the License, or (at your option) any later version.
+;
+; This library is distributed in the hope that it will be useful,
+; but WITHOUT ANY WARRANTY; without even the implied warranty of
+; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+; Library General Public License for more details.
+;
+; You should have received a copy of the GNU Library General Public
+; License along with this library; if not, write to the
+; Free Software Foundation, Inc., 59 Temple Place - Suite 330,
+; Boston, MA  02111-1307, USA.
+
+	bits 32
+
+%ifdef WIN32
+	%define FLAC__PUBLIC_NEEDS_UNDERSCORE
+	%idefine code_section section .text align=16 class=CODE use32
+	%idefine data_section section .data align=16 class=DATA use32
+	%idefine bss_section  section .bss  align=16 class=DATA use32
+%elifdef AOUT
+	%define FLAC__PUBLIC_NEEDS_UNDERSCORE
+	%idefine code_section section .text
+	%idefine data_section section .data
+	%idefine bss_section  section .bss
+%elifdef ELF
+	%idefine code_section section .text class=CODE use32
+	%idefine data_section section .data class=DATA use32
+	%idefine bss_section  section .bss  class=DATA use32
+%else
+	%error unsupported object format!
+%endif
+
+%imacro cglobal 1
+	%ifdef FLAC__PUBLIC_NEEDS_UNDERSCORE
+		%define %1 _%1
+	%endif
+	global %1
+%endmacro
+
+%imacro cextern 1
+	%ifdef FLAC__PUBLIC_NEEDS_UNDERSCORE
+		%define %1 _%1
+	%endif
+	extern %1
+%endmacro