Start on built-in LAME

Using LAME 3.10
Windows project files substantially changed from original, and included into audacity solution.

lib-src/libmp3lame/i386/cpu_feat.nas

@@ -0,0 +1,107 @@
+;
+;
+; 	assembler routines to detect CPU-features
+;
+;	MMX / 3DNow! / SSE / SSE2
+;
+;	for the LAME project
+;	Frank Klemm, Robert Hegemann 2000-10-12
+;
+
+%include "nasm.h"
+
+	globaldef	has_MMX_nasm
+	globaldef	has_3DNow_nasm
+	globaldef	has_SSE_nasm
+	globaldef	has_SSE2_nasm
+
+        segment_code
+
+testCPUID:
+	pushfd	                        
+	pop	eax
+	mov	ecx,eax
+	xor	eax,0x200000
+	push	eax
+	popfd
+	pushfd
+	pop	eax
+	cmp	eax,ecx
+	ret
+
+;---------------------------------------
+;	int  has_MMX_nasm (void)
+;---------------------------------------
+
+has_MMX_nasm:
+        pushad
+	call	testCPUID
+	jz	return0		; no CPUID command, so no MMX
+
+	mov	eax,0x1
+	CPUID
+	test	edx,0x800000
+	jz	return0		; no MMX support
+	jmp	return1		; MMX support
+        
+;---------------------------------------
+;	int  has_SSE_nasm (void)
+;---------------------------------------
+
+has_SSE_nasm:
+        pushad
+	call	testCPUID
+	jz	return0		; no CPUID command, so no SSE
+        
+	mov	eax,0x1
+	CPUID
+	test	edx,0x02000000
+	jz	return0		; no SSE support
+	jmp	return1		; SSE support
+        
+;---------------------------------------
+;	int  has_SSE2_nasm (void)
+;---------------------------------------
+
+has_SSE2_nasm:
+        pushad
+	call	testCPUID
+	jz	return0		; no CPUID command, so no SSE2
+        
+	mov	eax,0x1
+	CPUID
+	test	edx,0x04000000
+	jz	return0		; no SSE2 support
+	jmp	return1		; SSE2 support
+        
+;---------------------------------------
+;	int  has_3DNow_nasm (void)
+;---------------------------------------
+
+has_3DNow_nasm:
+        pushad
+	call	testCPUID
+	jz	return0		; no CPUID command, so no 3DNow!
+
+	mov	eax,0x80000000
+	CPUID
+	cmp	eax,0x80000000
+	jbe	return0		; no extended MSR(1), so no 3DNow!
+
+	mov	eax,0x80000001
+	CPUID
+	test	edx,0x80000000
+	jz	return0		; no 3DNow! support
+				; 3DNow! support
+return1:
+	popad
+	xor	eax,eax
+	inc	eax
+	ret
+
+return0:
+	popad
+	xor	eax,eax
+	ret
+        
+        end