I created a script to check if binary contains any SSE2 instructions: http://o.rths.cf/gpc/files1.rt/asm-sse2check.7z
which contains objdump(from strawberry Perl, 2012) and gawk(3.1.5 MBCS edition)
and there is some results(it can't check if code is used conditionally or not, it checks existence only)
browseui.dll ::
75eff021: 0f f4 75 6d pmuludq 0x6d(%ebp),%mm6
75eff025: 0f f4 75 8a pmuludq -0x76(%ebp),%mm6
dxtmsft.dll ::
41466697: 66 0f 28 c1 movapd %xmm1,%xmm0
41468917: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
dxtrans.dll ::
41539043: 66 0f 28 c1 movapd %xmm1,%xmm0
41557542: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
ieframe.dll ::
3ed59fde: 66 0f 28 c1 movapd %xmm1,%xmm0
3ee521a0: 0f d4 d6 paddq %mm6,%mm2
3ee5714e: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
iertutil.dll ::
3ec5fb91: 26 0f 5b b7 54 2c 2b cvtdq2ps %es:-0x37d4d3ac(%edi),%xmm6
3ec61265: 0f d4 e2 paddq %mm2,%mm4
jscript.dll ::
3e402aef: 66 0f 28 c1 movapd %xmm1,%xmm0
3e42212e: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
msexcl40.dll ::
1000a296: f2 0f 10 05 a0 10 00 movsd 0x100010a0,%xmm0
{snip}
msfeeds.dll ::
43cb2ee4: 66 0f 28 c1 movapd %xmm1,%xmm0
43cefad7: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
msfeedsbs.dll ::
mshtml.dll ::
3d1aca7d: 66 0f 28 c1 movapd %xmm1,%xmm0
3d273d80: 0f d4 60 3d paddq 0x3d(%eax),%mm4
3d2920bb: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
msihnd.dll ::
4012a0f3: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
4012a5ec: 66 0f 28 c1 movapd %xmm1,%xmm0
msjet40.dll ::
1001c688: f3 0f 6f 04 85 00 9e movdqu 0x10179e00(,%eax,4),%xmm0
{snip}
msjetoledb40.dll ::
10001519: f3 0f 6f 00 movdqu (%eax),%xmm0
{snip}
msjter40.dll ::
1000813b: f2 0f 70 c0 00 pshuflw $0x0,%xmm0,%xmm0
{snip}
msjtes40.dll ::
100160ee: f2 0f 10 40 08 movsd 0x8(%eax),%xmm0
{snip}
msltus40.dll ::
100068e5: 66 0f 13 44 24 0c movlpd %xmm0,0xc(%esp)
{snip}
mspbde40.dll ::
10006f05: 66 0f 13 44 24 0c movlpd %xmm0,0xc(%esp)
{snip}
msrd2x40.dll ::
10009dca: f3 0f 7f 02 movdqu %xmm0,(%edx)
{snip}
msrd3x40.dll ::
1000c402: f3 0f 6f 41 f0 movdqu -0x10(%ecx),%xmm0
{snip}
msrepl40.dll ::
1000df27: f3 0f 6f 46 04 movdqu 0x4(%esi),%xmm0
{snip}
mstext40.dll ::
10009285: 66 0f 13 44 24 0c movlpd %xmm0,0xc(%esp)
{snip}
mstime.dll ::
41e61c93: 66 0f 28 c1 movapd %xmm1,%xmm0
41ecc75e: f2 0f 2c 04 24 cvttsd2si (%esp),%eax
msvidctl.dll ::
5fb60aba: 0f fb a8 f2 4f bd 00 psubq 0xbd4ff2(%eax),%mm5
{snip}
mswdat10.dll ::
10005258: 66 0f 6f 4e f4 movdqa -0xc(%esi),%xmm1
{snip}
msxbde40.dll ::
1000453a: 0f fb a8 f2 4f bd 00 psubq 0xbd4ff2(%eax),%mm5
{snip}
ntdll.dll ::
7c9219ed: 66 0f 28 15 e0 1a 92 movapd 0x7c921ae0,%xmm2
7c9219f5: 66 0f 28 c8 movapd %xmm0,%xmm1
7c9219f9: 66 0f 28 f8 movapd %xmm0,%xmm7
7c921a06: 66 0f 54 05 00 1b 92 andpd 0x7c921b00,%xmm0
7c921a3a: 66 0f 2e ff ucomisd %xmm7,%xmm7
7c921a73: 66 0f 28 d8 movapd %xmm0,%xmm3
7c921a8a: 66 0f 54 05 d0 1a 92 andpd 0x7c921ad0,%xmm0
7c921a92: f2 0f 58 c8 addsd %xmm0,%xmm1
7c921ab1: 66 0f 54 1d d0 1a 92 andpd 0x7c921ad0,%xmm3
7c921b2e: 66 0f 28 15 20 1c 92 movapd 0x7c921c20,%xmm2
7c921b36: 66 0f 28 c8 movapd %xmm0,%xmm1
7c921b3a: 66 0f 28 f8 movapd %xmm0,%xmm7
7c921b47: 66 0f 54 05 50 1c 92 andpd 0x7c921c50,%xmm0
7c921b7b: 66 0f 2e ff ucomisd %xmm7,%xmm7
7c921bb4: 66 0f 28 d8 movapd %xmm0,%xmm3
7c921bcb: 66 0f 54 05 10 1c 92 andpd 0x7c921c10,%xmm0
7c921bd3: f2 0f 5c c8 subsd %xmm0,%xmm1
7c921bee: 66 0f 56 1d 40 1c 92 orpd 0x7c921c40,%xmm3
7c921bf6: 66 0f 54 1d 30 1c 92 andpd 0x7c921c30,%xmm3
rsaenh.dll ::
68029460: 0f d4 ca paddq %mm2,%mm1
{snip}
win32k.sys ::
bf865b39: 0f 5a 86 bf 27 5d 86 cvtps2pd -0x79a2d841(%esi),%xmm0
wininet.dll ::
3e55f2a7: 3e 0f f4 55 3e pmuludq %ds:0x3e(%ebp),%mm2