240 lines
6.0 KiB
Go
240 lines
6.0 KiB
Go
// +build ignore
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package main
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import (
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"fmt"
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. "github.com/mmcloughlin/avo/build"
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. "github.com/mmcloughlin/avo/operand"
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. "github.com/mmcloughlin/avo/reg"
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)
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func main() {
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genGlobals()
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genCompressChunksAVX2()
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Generate()
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}
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var globals struct {
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iv Mem
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blockLen Mem
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stride1024 Mem
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incrementCounter Mem
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setFlags Mem
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shuffleRot8 Mem
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shuffleRot16 Mem
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}
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func genGlobals() {
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globals.iv = GLOBL("iv", RODATA|NOPTR)
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DATA(0*4, U32(0x6A09E667))
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DATA(1*4, U32(0xBB67AE85))
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DATA(2*4, U32(0x3C6EF372))
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DATA(3*4, U32(0xA54FF53A))
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globals.blockLen = GLOBL("block_len", RODATA|NOPTR)
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for i := 0; i < 8; i++ {
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DATA(i*4, U32(64))
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}
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globals.stride1024 = GLOBL("stride_1024", RODATA|NOPTR)
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for i := 0; i < 8; i++ {
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DATA(i*4, U32(i*1024))
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}
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globals.incrementCounter = GLOBL("increment_counter", RODATA|NOPTR)
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for i := 0; i < 8; i++ {
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DATA(i*8, U64(i))
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}
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globals.setFlags = GLOBL("set_flags", RODATA|NOPTR)
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for i := 0; i < 16; i++ {
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if i == 0 {
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DATA(i*4, U32(1))
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} else if i == 15 {
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DATA(i*4, U32(2))
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} else {
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DATA(i*4, U32(0))
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}
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}
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globals.shuffleRot8 = GLOBL("shuffle_rot8", RODATA|NOPTR)
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for i := 0; i < 8; i++ {
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DATA(i*4, U32(0x00030201+0x04040404*i))
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}
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globals.shuffleRot16 = GLOBL("shuffle_rot16", RODATA|NOPTR)
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for i := 0; i < 8; i++ {
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DATA(i*4, U32(0x01000302+0x04040404*i))
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}
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}
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func genCompressChunksAVX2() {
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TEXT("compressChunksAVX2", NOSPLIT, "func(cvs *[8][8]uint32, buf *[8192]byte, key *[8]uint32, counter uint64, flags uint32)")
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cvs := Mem{Base: Load(Param("cvs"), GP64())}
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buf := Mem{Base: Load(Param("buf"), GP64())}
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key := Mem{Base: Load(Param("key"), GP64())}
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counter, _ := Param("counter").Resolve()
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flags, _ := Param("flags").Resolve()
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vs := [16]VecVirtual{
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YMM(), YMM(), YMM(), YMM(),
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YMM(), YMM(), YMM(), YMM(),
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YMM(), YMM(), YMM(), YMM(),
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YMM(), YMM(), YMM(), YMM(),
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}
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// stack space for transposed message vectors
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var mv [16]Mem
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for i := range mv {
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mv[i] = AllocLocal(32)
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}
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// stack space for spilled vs[8] register
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spillMem := AllocLocal(32)
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Comment("Load key")
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for i := 0; i < 8; i++ {
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VPBROADCASTD(key.Offset(i*4), vs[i])
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}
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Comment("Initialize counter")
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counterLo := AllocLocal(32)
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counterHi := AllocLocal(32)
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VPBROADCASTQ(counter.Addr, vs[12])
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VPBROADCASTQ(counter.Addr, vs[13])
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VPADDQ(globals.incrementCounter.Offset(0*32), vs[12], vs[12])
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VPADDQ(globals.incrementCounter.Offset(1*32), vs[13], vs[13])
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VPUNPCKLDQ(vs[13], vs[12], vs[14])
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VPUNPCKHDQ(vs[13], vs[12], vs[15])
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VPUNPCKLDQ(vs[15], vs[14], vs[12])
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VPUNPCKHDQ(vs[15], vs[14], vs[13])
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VPERMQ(Imm(0xd8), vs[12], vs[12])
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VPERMQ(Imm(0xd8), vs[13], vs[13])
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VMOVDQU(vs[12], counterLo)
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VMOVDQU(vs[13], counterHi)
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Comment("Initialize flags")
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chunkFlags := AllocLocal(16 * 4)
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VPBROADCASTD(flags.Addr, vs[14])
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VPOR(globals.setFlags.Offset(0*32), vs[14], vs[15])
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VMOVDQU(vs[15], chunkFlags.Offset(0*32))
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VPOR(globals.setFlags.Offset(1*32), vs[14], vs[15])
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VMOVDQU(vs[15], chunkFlags.Offset(1*32))
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Comment("Loop index")
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loop := GP64()
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XORQ(loop, loop)
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Label("loop")
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Comment("Load transposed block")
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VMOVDQU(globals.stride1024, vs[9])
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for i := 0; i < 16; i++ {
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VPCMPEQD(vs[8], vs[8], vs[8]) // fastest way to set all bits to 1
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VPGATHERDD(vs[8], buf.Offset(i*4).Idx(vs[9], 1), vs[10])
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VMOVDQU(vs[10], mv[i])
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}
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ADDQ(Imm(64), buf.Base)
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Comment("Reload state vectors (other than CVs)")
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for i := 0; i < 4; i++ {
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VPBROADCASTD(globals.iv.Offset(i*4), vs[8+i])
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}
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VMOVDQU(counterLo, vs[12])
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VMOVDQU(counterHi, vs[13])
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VMOVDQU(globals.blockLen, vs[14])
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VPBROADCASTD(chunkFlags.Idx(loop, 4), vs[15])
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VMOVDQU(vs[8], spillMem) // spill
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for i := 0; i < 7; i++ {
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Comment(fmt.Sprintf("Round %v", i+1))
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round(vs, mv, vs[8], spillMem)
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// permute
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mv = [16]Mem{
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mv[2], mv[6], mv[3], mv[10],
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mv[7], mv[0], mv[4], mv[13],
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mv[1], mv[11], mv[12], mv[5],
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mv[9], mv[14], mv[15], mv[8],
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}
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}
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Comment("Finalize CVs")
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VMOVDQU(spillMem, vs[8]) // reload
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for i := range vs[:8] {
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VPXOR(vs[i], vs[i+8], vs[i])
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}
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Comment("Loop")
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INCQ(loop)
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CMPQ(loop, U32(16))
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JNE(LabelRef("loop"))
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Comment("Finished; transpose CVs")
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src, dst := vs[:8], vs[8:]
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// interleave uint32s
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for i := 0; i < 8; i += 2 {
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VPUNPCKLDQ(src[i+1], src[i], dst[i+0])
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VPUNPCKHDQ(src[i+1], src[i], dst[i+1])
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}
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// interleave groups of two uint32s
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for i := 0; i < 4; i++ {
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j := i*2 - i%2 // j := 0,1,4,5
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VPUNPCKLQDQ(dst[j+2], dst[j], src[i*2+0])
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VPUNPCKHQDQ(dst[j+2], dst[j], src[i*2+1])
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}
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// interleave groups of four uint32s
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for i := 0; i < 4; i++ {
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VPERM2I128(Imm(0x20), src[i+4], src[i], dst[i+0])
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VPERM2I128(Imm(0x31), src[i+4], src[i], dst[i+4])
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}
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for i, v := range dst {
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VMOVDQU(v, cvs.Offset(i*32))
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}
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RET()
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}
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func round(sv [16]VecVirtual, mv [16]Mem, tmp VecVirtual, spillMem Mem) {
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g(sv[0], sv[4], sv[8], sv[12], mv[0], mv[1], tmp, spillMem)
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g(sv[1], sv[5], sv[9], sv[13], mv[2], mv[3], tmp, spillMem)
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g(sv[2], sv[6], sv[10], sv[14], mv[4], mv[5], tmp, spillMem)
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g(sv[3], sv[7], sv[11], sv[15], mv[6], mv[7], tmp, spillMem)
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g(sv[0], sv[5], sv[10], sv[15], mv[8], mv[9], tmp, spillMem)
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g(sv[1], sv[6], sv[11], sv[12], mv[10], mv[11], tmp, spillMem)
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g(sv[2], sv[7], sv[8], sv[13], mv[12], mv[13], tmp, spillMem)
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g(sv[3], sv[4], sv[9], sv[14], mv[14], mv[15], tmp, spillMem)
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}
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func g(a, b, c, d VecVirtual, mx, my Mem, tmp VecVirtual, spillMem Mem) {
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// Helper function for performing rotations. Also manages c, tmp and
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// spillMem: if c == tmp, we need to spill and reload c using spillMem.
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rotr := func(v VecVirtual, n uint64, dst VecVirtual) {
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switch n {
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case 8, 16:
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shuf := [...]Mem{8: globals.shuffleRot8, 16: globals.shuffleRot16}[n]
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VPSHUFB(shuf, v, dst)
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if c == tmp {
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VMOVDQU(spillMem, c)
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}
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case 7, 12:
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if c == tmp {
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VMOVDQU(c, spillMem)
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}
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VPSRLD(Imm(n), v, tmp)
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VPSLLD(Imm(32-n), v, dst)
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VPOR(dst, tmp, dst)
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}
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}
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VPADDD(a, b, a)
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VPADDD(mx, a, a)
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VPXOR(d, a, d)
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rotr(d, 16, d)
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VPADDD(c, d, c)
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VPXOR(b, c, b)
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rotr(b, 12, b)
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VPADDD(a, b, a)
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VPADDD(my, a, a)
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VPXOR(d, a, d)
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rotr(d, 8, d)
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VPADDD(c, d, c)
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VPXOR(b, c, b)
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rotr(b, 7, b)
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}
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