[Beignet] [PATCH 0/8] Implement double division on BDW

[junyan.he at inbox.com]

From: Junyan He <junyan.he at linux.intel.com>

We use the macro:
r0 = 0, r6 = a, r7 = b, r1 = 1

math.eo.f0.0 (4) r8.acc2 r6.noacc r7.noacc 0xE
(-f0.0) if
madm (4) r9.acc3 r0.noacc r6.noacc r8.acc2       // Step(1), q0=a*y0
madm (4) r10.acc4 r1.noacc -r7.noacc r8.acc2     // Step(2), e0=(1-b*y0)
madm (4) r11.acc5 r6.noacc -r7.noacc r9.acc3     // Step(3), r0=a-b*q0
madm (4) r12.acc6 r8.acc2 r10.acc4 r8.acc2       // Step(4), y1=y0+e0*y0
madm (4) r13.acc7 r1.noacc -r7.noacc r12.acc6    // Step(5), e1=(1-b*y1)
madm (4) r8.acc8 r8.acc2 r10.acc4 r12.acc6       // Step(6), y2=y0+e0*y1
madm (4) r9.acc9 r9.acc3 r11.acc5 r12.acc6       // Step(7), q1=q0+r0*y1
madm (4) r12.acc2 r12.acc6 r8.acc8 r13.acc7      // Step(8), y3=y1+e1*y2
madm (4) r11.acc3 r6.noacc -r7.noacc r9.acc9     // Step(9), r1=a-b*q1

madm (4) r8.noacc r9.acc9 r11.acc3 r12.acc2      // Step(10), q=q1+r1*y3
endif

to implement hi precision double division on BDW.

Signed-off-by: Junyan He <junyan.he at linux.intel.com>
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