📄 fdct_ia64.s
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st8 [loc6] = loc19
st8 [loc7] = loc27
st8 [loc8] = loc20
st8 [loc9] = loc28
st8 [loc10] = loc21
st8 [loc11] = loc29
st8 [loc12] = loc22
st8 [loc13] = loc30
st8 [loc14] = loc23
st8 [loc15] = loc31
mov ar.pfs = r14
br.ret.sptk.many b0
.endp fdct_ia64#
.common fdct#,8,8
//***********************************************
//* Here is a version of the DCT implementation *
//* unoptimized in terms of command ordering. *
//* This version is about 30% slower but *
//* easier understand. *
//***********************************************
//
// .pred.safe_across_calls p1-p5,p16-p63
//.text
// .align 16
// .global fdct_ia64#
// .proc fdct_ia64#
//fdct_ia64:
// .prologue
// alloc r14 = ar.pfs, 1, 56, 0, 0
//
// // *******************
// // Save constants
// // *******************
// mov r31 = 0x32ec // c0 = tan(1pi/16)
// mov r30 = 0x6a0a // c1 = tan(2pi/16)
// mov r29 = 0xab0e // c2 = tan(3pi/16)
// mov r28 = 0xb505 // g4 = cos(4pi/16)
// mov r27 = 0xd4db // g3 = cos(3pi/16)
// mov r26 = 0xec83 // g2 = cos(2pi/16)
// mov r25 = 0xfb15 // g1 = cos(1pi/16)
// mov r24 = 0x0002 // correction bit for descaling
// mov r23 = 0x0004 // correction bit for descaling
//
// // **************************
// // Load Matrix into registers
// // **************************
//
// add loc0 = r0, r32
// ;;
// mux2 r31 = r31, 0x00
// mux2 r30 = r30, 0x00
// mux2 r29 = r29, 0x00
// mux2 r28 = r28, 0x00
// mux2 r27 = r27, 0x00
// mux2 r26 = r26, 0x00
// mux2 r25 = r25, 0x00
// mux2 r24 = r24, 0x00
// mux2 r23 = r23, 0x00
// ld8 loc16 = [loc0]
// add loc2 = 16, r32
// add loc4 = 32, r32
// add loc6 = 48, r32
// add loc8 = 64, r32
// add loc10 = 80, r32
// ;;
// ld8 loc17 = [loc2]
// ld8 loc18 = [loc4]
// add loc12 = 96, r32
// ld8 loc19 = [loc6]
// ld8 loc20 = [loc8]
// add loc14 = 112, r32
// ;;
// ld8 loc21 = [loc10]
// ld8 loc22 = [loc12]
// add loc1 = 8, r32
// ld8 loc23 = [loc14]
// add loc3 = 24, r32
// add loc5 = 40, r32
// ;;
// ld8 loc24 = [loc1]
// ld8 loc25 = [loc3]
// add loc7 = 56, r32
// ld8 loc26 = [loc5]
// add loc9 = 72, r32
// add loc11 = 88, r32
// ;;
// ld8 loc27 = [loc7]
// ld8 loc28 = [loc9]
// add loc13 = 104, r32
// ld8 loc29 = [loc11]
// add loc15 = 120, r32
// ;;
// ld8 loc30 = [loc13]
// ld8 loc31 = [loc15]
// ;;
// // ******
// // Scale
// // ******
// pshl2 loc16 = loc16, 3
// pshl2 loc17 = loc17, 3
// pshl2 loc18 = loc18, 3
// pshl2 loc19 = loc19, 3
// pshl2 loc20 = loc20, 3
// pshl2 loc21 = loc21, 3
// pshl2 loc22 = loc22, 3
// pshl2 loc23 = loc23, 3
// pshl2 loc24 = loc24, 3
// pshl2 loc25 = loc25, 3
// pshl2 loc26 = loc26, 3
// pshl2 loc27 = loc27, 3
// pshl2 loc28 = loc28, 3
// pshl2 loc29 = loc29, 3
// pshl2 loc30 = loc30, 3
// pshl2 loc31 = loc31, 3
// ;;
//
// // *******************
// // column-DTC 1st half
// // *******************
//
// padd2 loc32 = loc16, loc23 // t0 = x0 + x7
// padd2 loc33 = loc17, loc22 // t1 = x1 + x6
// padd2 loc34 = loc18, loc21 // t2 = x2 + x5
// padd2 loc35 = loc19, loc20 // t3 = x3 + x4
// psub2 loc36 = loc16, loc23 // t4 = x0 - x7
// psub2 loc37 = loc17, loc22 // t5 = x1 - x6
// psub2 loc38 = loc18, loc21 // t6 = x2 - x5
// psub2 loc39 = loc19, loc20 // t7 = x3 - x4
// ;;
// padd2 loc40 = loc37, loc38 // buf0 = t5 + t6
// psub2 loc41 = loc37, loc38 // buf1 = t5 - t6
// ;;
// pmpyshr2 loc37 = loc40, r28, 16 // t5 = buf0 * g4
// pmpyshr2 loc38 = loc41, r28, 16 // t6 = buf1 * g4
// ;;
// padd2 loc37 = loc37, loc40 // t5 = t5 + buf1
// padd2 loc38 = loc38, loc41 // t6 = t6 + buf2
// ;;
// padd2 loc16 = loc32, loc35 // x0 = t0 + t3
// padd2 loc17 = loc33, loc34 // x1 = t1 + t2
// psub2 loc18 = loc32, loc35 // x2 = t0 - t3
// psub2 loc19 = loc33, loc34 // x3 = t1 - t2
// padd2 loc20 = loc36, loc37 // x4 = t4 + t5
// padd2 loc21 = loc38, loc39 // x5 = t6 + t7
// psub2 loc22 = loc36, loc37 // x6 = t4 - t5
// psub2 loc23 = loc38, loc39 // x7 = t6 - t7
// ;;
//
// padd2 loc32 = loc16, loc17 // t0 = x0 + x1
// psub2 loc33 = loc16, loc17 // t1 = x0 - x1
// pmpyshr2 loc42 = loc18, r30, 16 // buf2 = x2 * c1
// pmpyshr2 loc43 = loc19, r30, 16 // buf3 = x3 * c1
// pmpyshr2 loc44 = loc20, r31, 16 // buf4 = x4 * c0
// pmpyshr2 loc45 = loc21, r31, 16 // buf5 = x5 * c0
// pmpyshr2 loc46 = loc22, r29, 16 // buf6 = x6 * c2
// pmpyshr2 loc47 = loc23, r29, 16 // buf7 = x7 * c2
// ;;
// padd2 loc46 = loc46, loc22 // buf6 = buf6 + x6
// padd2 loc47 = loc47, loc23 // buf7 = buf7 + x7
// ;;
// padd2 loc34 = loc18, loc43 // t2 = x2 + (x3 * c1)
// psub2 loc35 = loc42, loc19 // t3 = (c1 * x2) - x3
// padd2 loc36 = loc20, loc45 // t4 = x4 + (x5 * c1)
// psub2 loc37 = loc44, loc21 // t5 = (c1 * x4) - x5
// padd2 loc38 = loc22, loc47 // t6 = x6 + (x7 * c1)
// psub2 loc39 = loc46, loc23 // t7 = (c1 * x6) - x7
// ;;
// pmpyshr2 loc16 = loc32, r28, 16 // x0 = t0 * g4
// pmpyshr2 loc17 = loc33, r28, 16 // x1 = t1 * g4
// pmpyshr2 loc18 = loc34, r26, 16 // x2 = t2 * g2
// pmpyshr2 loc19 = loc35, r26, 16 // x3 = t3 * g2
// pmpyshr2 loc20 = loc36, r25, 16 // x4 = t4 * g1
// pmpyshr2 loc21 = loc37, r25, 16 // x5 = t5 * g1
// pmpyshr2 loc22 = loc38, r27, 16 // x6 = t6 * g3
// pmpyshr2 loc23 = loc39, r27, 16 // x7 = t7 * g3
// ;;
// padd2 loc48 = loc16, loc32 // y0 = x0 + t0
// padd2 loc49 = loc20, loc36 // y1 = x4 + t4
// padd2 loc50 = loc18, loc34 // y2 = x2 + t2
// padd2 loc51 = loc22, loc38 // y3 = x6 + t6
// padd2 loc52 = loc17, loc33 // y4 = x1 + t1
// padd2 loc53 = loc23, loc39 // y5 = x7 + t7
// padd2 loc54 = loc19, loc35 // y6 = x3 + t3
// padd2 loc55 = loc21, loc37 // y7 = x5 + t5
// ;;
//
// // *******************
// // column-DTC 2nd half
// // *******************
//
// padd2 loc32 = loc24, loc31 // t0 = x0.2 + x7.2
// padd2 loc33 = loc25, loc30 // t1 = x1.2 + x6.2
// padd2 loc34 = loc26, loc29 // t2 = x2.2 + x5.2
// padd2 loc35 = loc27, loc28 // t3 = x3.2 + x4.2
// psub2 loc36 = loc24, loc31 // t4 = x0.2 - x7.2
// psub2 loc37 = loc25, loc30 // t5 = x1.2 - x6.2
// psub2 loc38 = loc26, loc29 // t6 = x2.2 - x5.2
// psub2 loc39 = loc27, loc28 // t7 = x3.2 - x4.2
// ;;
// padd2 loc40 = loc37, loc38 // buf0 = t5 + t6
// psub2 loc41 = loc37, loc38 // buf1 = t5 - t6
// ;;
// pmpyshr2 loc37 = loc40, r28, 16 // t5 = buf0 * g4
// pmpyshr2 loc38 = loc41, r28, 16 // t6 = buf1 * g4
// ;;
// padd2 loc37 = loc37, loc40 // t5 = t5 + buf1
// padd2 loc38 = loc38, loc41 // t6 = t6 + buf2
// ;;
// padd2 loc16 = loc32, loc35 // x0 = t0 + t3
// padd2 loc17 = loc33, loc34 // x1 = t1 + t2
// psub2 loc18 = loc32, loc35 // x2 = t0 - t3
// psub2 loc19 = loc33, loc34 // x3 = t1 - t2
// padd2 loc20 = loc36, loc37 // x4 = t4 + t5
// padd2 loc21 = loc38, loc39 // x5 = t6 + t7
// psub2 loc22 = loc36, loc37 // x6 = t4 - t5
// psub2 loc23 = loc38, loc39 // x7 = t6 - t7
// ;;
// padd2 loc32 = loc16, loc17 // t0 = x0 + x1
// psub2 loc33 = loc16, loc17 // t1 = x0 - x1
// pmpyshr2 loc42 = loc18, r30, 16 // buf2 = x2 * c1
// pmpyshr2 loc43 = loc19, r30, 16 // buf3 = x3 * c1
// pmpyshr2 loc44 = loc20, r31, 16 // buf4 = x4 * c0
// pmpyshr2 loc45 = loc21, r31, 16 // buf5 = x5 * c0
// pmpyshr2 loc46 = loc22, r29, 16 // buf6 = x6 * c2
// pmpyshr2 loc47 = loc23, r29, 16 // buf7 = x7 * c2
// ;;
// padd2 loc46 = loc46, loc22 // buf6 = buf6 + x6
// padd2 loc47 = loc47, loc23 // buf7 = buf7 + x7
// ;;
// padd2 loc34 = loc18, loc43 // t2 = x2 + (x3 * c1)
// psub2 loc35 = loc42, loc19 // t3 = (c1 * x2) - x3
// padd2 loc36 = loc20, loc45 // t4 = x4 + (x5 * c1)
// psub2 loc37 = loc44, loc21 // t5 = (c1 * x4) - x5
// padd2 loc38 = loc22, loc47 // t6 = x6 + (x7 * c1)
// psub2 loc39 = loc46, loc23 // t7 = (c1 * x6) - x7
// ;;
// pmpyshr2 loc16 = loc32, r28, 16 // x0 = t0 * g4
// pmpyshr2 loc17 = loc33, r28, 16 // x1 = t1 * g4
// pmpyshr2 loc18 = loc34, r26, 16 // x2 = t2 * g2
// pmpyshr2 loc19 = loc35, r26, 16 // x3 = t3 * g2
// pmpyshr2 loc20 = loc36, r25, 16 // x4 = t4 * g1
// pmpyshr2 loc21 = loc37, r25, 16 // x5 = t5 * g1
// pmpyshr2 loc22 = loc38, r27, 16 // x6 = t6 * g3
// pmpyshr2 loc23 = loc39, r27, 16 // x7 = t7 * g3
// ;;
// padd2 loc40 = loc16, loc32 // y0.2 = x0 + t0
// padd2 loc41 = loc20, loc36 // y1.2 = x4 + t4
// padd2 loc42 = loc18, loc34 // y2.2 = x2 + t2
// padd2 loc43 = loc22, loc38 // y3.2 = x6 + t6
// padd2 loc44 = loc17, loc33 // y4.2 = x1 + t1
// padd2 loc45 = loc23, loc39 // y5.2 = x7 + t7
// padd2 loc46 = loc19, loc35 // y6.2 = x3 + t3
// padd2 loc47 = loc21, loc37 // y7.2 = x5 + t5
// ;;
// padd2 loc40 = loc40, r24 // add r24 to correct rounding
// padd2 loc41 = loc41, r24
// padd2 loc42 = loc42, r24
// padd2 loc43 = loc43, r24
// padd2 loc44 = loc44, r24
// padd2 loc45 = loc45, r24
// padd2 loc46 = loc46, r24
// padd2 loc47 = loc47, r24
// padd2 loc48 = loc48, r24
// padd2 loc49 = loc49, r24
// padd2 loc50 = loc50, r24
// padd2 loc51 = loc51, r24
// padd2 loc52 = loc52, r24
// padd2 loc53 = loc53, r24
// padd2 loc54 = loc54, r24
// padd2 loc55 = loc55, r24
// ;;
// pshr2 loc40 = loc40, 2 // Divide all matrix elements through 4
// pshr2 loc41 = loc41, 2
// pshr2 loc42 = loc42, 2
// pshr2 loc43 = loc43, 2
// pshr2 loc44 = loc44, 2
// pshr2 loc45 = loc45, 2
// pshr2 loc46 = loc46, 2
// pshr2 loc47 = loc47, 2
// pshr2 loc48 = loc48, 2
// pshr2 loc49 = loc49, 2
// pshr2 loc50 = loc50, 2
// pshr2 loc51 = loc51, 2
// pshr2 loc52 = loc52, 2
// pshr2 loc53 = loc53, 2
// pshr2 loc54 = loc54, 2
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