[Bug 223415] lang/rust: don't require SSE2 on i386 (at least for binary packages)

[bugzilla-noreply at freebsd.org]

https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=223415

--- Comment #12 from Bertrand Petit <bsdpr at phoe.frmug.org> ---
(In reply to Jan Beich from comment #11)
Jan, I took another route:

$ fetch http://pkg.freebsd.org/FreeBSD:11:i386/latest/All/ripgrep-0.7.1_3.txz
[...]
$ sha256 ripgrep-0.7.1_3.txz 
SHA256 (ripgrep-0.7.1_3.txz) =
501e31aef29bf5cd7c73bdea4eca376126ee2bf1b06da044071e0d8c3179af51
$ tar xf ripgrep-0.7.1_3.txz
$ objdump -d usr/local/bin/rg | grep xmm
  1d922c:       f2 0f 2a 4c 24 08       cvtsi2sd 0x8(%esp),%xmm1
  1d9232:       f3 0f 10 44 24 04       movss  0x4(%esp),%xmm0
  1d923e:       f2 0f 59 88 13 62 05    mulsd  0x56213(%eax),%xmm1
  1d9246:       f2 0f 10 90 03 62 05    movsd  0x56203(%eax),%xmm2
  1d924e:       f2 0f 5c ca             subsd  %xmm2,%xmm1
  1d9252:       66 0f 56 c2             orpd   %xmm2,%xmm0
  1d9256:       f2 0f 58 c1             addsd  %xmm1,%xmm0
  1d925a:       f2 0f 11 44 24 04       movsd  %xmm0,0x4(%esp)
  1d9268:       f3 0f 10 4c 24 08       movss  0x8(%esp),%xmm1
  1d926e:       f3 0f 10 44 24 04       movss  0x4(%esp),%xmm0
  1d927a:       66 0f 56 88 07 62 05    orpd   0x56207(%eax),%xmm1
  1d9282:       f2 0f 5c 88 f7 61 05    subsd  0x561f7(%eax),%xmm1
  1d928a:       66 0f 56 80 e7 61 05    orpd   0x561e7(%eax),%xmm0
  1d9292:       f2 0f 58 c1             addsd  %xmm1,%xmm0
  1d9296:       f2 0f 11 44 24 04       movsd  %xmm0,0x4(%esp)

Unfortunately cvtsi2sd is an SSE2 instruction, this package wont run on non
SSE2 hosts unless that operation is located in dead code.

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