VSCATTERQPD (VSIB_ZMM, K, ZMM)

Experiment 1

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0
Chain instructions: MOV R12, [R14];MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;XOR R14, R12; XOR R14, R12;VPCMPD K1, XMM15, XMM15, 7
Chain latency: ≥12

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0
   7:	4d 8b 26             	mov    r12,QWORD PTR [r14]
   a:	4d 63 e4             	movsxd r12,r12d
   d:	4d 63 e4             	movsxd r12,r12d
  10:	4d 63 e4             	movsxd r12,r12d
  13:	4d 63 e4             	movsxd r12,r12d
  16:	4d 63 e4             	movsxd r12,r12d
  19:	4d 63 e4             	movsxd r12,r12d
  1c:	4d 63 e4             	movsxd r12,r12d
  1f:	4d 63 e4             	movsxd r12,r12d
  22:	4d 63 e4             	movsxd r12,r12d
  25:	4d 63 e4             	movsxd r12,r12d
  28:	4d 31 e6             	xor    r14,r12
  2b:	4d 31 e6             	xor    r14,r12
  2e:	62 d3 05 08 1f cf 07 	vpcmpd k1,xmm15,xmm15,0x7

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 15.0
- Core cycles: 24.07
- Reference cycles: 18.08
- UOPS_EXECUTED.THREAD: 32.98

Experiment 2 (with additional nop)

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0
Chain instructions: MOV R12, [R14];MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;MOVSX R12, R12D;XOR R14, R12; XOR R14, R12;nop;VPCMPD K1, XMM15, XMM15, 7
Chain latency: ≥12

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0
   7:	4d 8b 26             	mov    r12,QWORD PTR [r14]
   a:	4d 63 e4             	movsxd r12,r12d
   d:	4d 63 e4             	movsxd r12,r12d
  10:	4d 63 e4             	movsxd r12,r12d
  13:	4d 63 e4             	movsxd r12,r12d
  16:	4d 63 e4             	movsxd r12,r12d
  19:	4d 63 e4             	movsxd r12,r12d
  1c:	4d 63 e4             	movsxd r12,r12d
  1f:	4d 63 e4             	movsxd r12,r12d
  22:	4d 63 e4             	movsxd r12,r12d
  25:	4d 63 e4             	movsxd r12,r12d
  28:	4d 31 e6             	xor    r14,r12
  2b:	4d 31 e6             	xor    r14,r12
  2e:	90                   	nop
  2f:	62 d3 05 08 1f cf 07 	vpcmpd k1,xmm15,xmm15,0x7

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 16.0
- Core cycles: 24.06
- Reference cycles: 18.24
- UOPS_EXECUTED.THREAD: 33.02

Latency operand 2 → 2: 2

Experiment 1

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 1.0
- Core cycles: 7.0
- Reference cycles: 5.28
- UOPS_EXECUTED.THREAD: 19.0

Experiment 2

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0
Chain instructions: KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1;KMOVQ K1, K1
Chain latency: 11

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0
   7:	c4 e1 f8 90 c9       	kmovq  k1,k1
   c:	c4 e1 f8 90 c9       	kmovq  k1,k1
  11:	c4 e1 f8 90 c9       	kmovq  k1,k1
  16:	c4 e1 f8 90 c9       	kmovq  k1,k1
  1b:	c4 e1 f8 90 c9       	kmovq  k1,k1
  20:	c4 e1 f8 90 c9       	kmovq  k1,k1
  25:	c4 e1 f8 90 c9       	kmovq  k1,k1
  2a:	c4 e1 f8 90 c9       	kmovq  k1,k1
  2f:	c4 e1 f8 90 c9       	kmovq  k1,k1
  34:	c4 e1 f8 90 c9       	kmovq  k1,k1
  39:	c4 e1 f8 90 c9       	kmovq  k1,k1

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 12.0
- Core cycles: 13.0
- Reference cycles: 9.6
- UOPS_EXECUTED.THREAD: 29.99

Latency operand 3 → 1: ≤6

Experiment 1

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0
Chain instructions: VMOVSD XMM13, [R14];VSHUFPD XMM0, XMM13, XMM13, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VSHUFPD XMM0, XMM0, XMM0, 0;VPCMPD K1, XMM15, XMM15, 7
Chain latency: ≥12

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0
   7:	c4 41 7b 10 2e       	vmovsd xmm13,QWORD PTR [r14]
   c:	c4 c1 11 c6 c5 00    	vshufpd xmm0,xmm13,xmm13,0x0
  12:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  17:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  1c:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  21:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  26:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  2b:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  30:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  35:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  3a:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  3f:	c5 f9 c6 c0 00       	vshufpd xmm0,xmm0,xmm0,0x0
  44:	62 d3 05 08 1f cf 07 	vpcmpd k1,xmm15,xmm15,0x7

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 19.16
- Reference cycles: 14.4
- UOPS_EXECUTED.THREAD: 32.04

Experiment 2

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0
Chain instructions: VMOVQ XMM13, [R14];VPAND XMM0, XMM13, XMM13;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPAND XMM0, XMM0, XMM0;VPCMPD K1, XMM15, XMM15, 7
Chain latency: ≥12

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0
   7:	c4 41 7a 7e 2e       	vmovq  xmm13,QWORD PTR [r14]
   c:	c4 c1 11 db c5       	vpand  xmm0,xmm13,xmm13
  11:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  15:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  19:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  1d:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  21:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  25:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  29:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  2d:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  31:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  35:	c5 f9 db c0          	vpand  xmm0,xmm0,xmm0
  39:	62 d3 05 08 1f cf 07 	vpcmpd k1,xmm15,xmm15,0x7

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 14.0
- Core cycles: 18.37
- Reference cycles: 13.44
- UOPS_EXECUTED.THREAD: 32.0

Latency operand 3 → 2: 7

Experiment 1

Instruction: VSCATTERQPD [R14+ZMM14] {K1}, ZMM0
Chain instructions: VMOVUPS ZMM0 {K1}, ZMM14;VPCMPD K1, XMM15, XMM15, 7
Chain latency: 1

Code:

   0:	62 92 fd 49 a3 04 36 	vscatterqpd QWORD PTR [r14+zmm14*1]{k1},zmm0
   7:	62 d1 7c 49 10 c6    	vmovups zmm0{k1},zmm14
   d:	62 d3 05 08 1f cf 07 	vpcmpd k1,xmm15,xmm15,0x7

Init:

MOV R15, 10000;
L: VADDPS ZMM0, ZMM1, ZMM1;
VADDPS ZMM0, ZMM1, ZMM1;
DEC R15;
JNZ L;
VZEROALL;
MOV RAX, 0x4000000040000000;
MOV [R14+0], RAX;
MOV [R14+8], RAX;
MOV [R14+16], RAX;
MOV [R14+24], RAX;
MOV [R14+32], RAX;
MOV [R14+40], RAX;
MOV [R14+48], RAX;
MOV [R14+56], RAX;
VMOVUPD ZMM0, [R14];
VXORPS ZMM14, ZMM14, ZMM14

Show nanoBench command
Results:
- Instructions retired: 3.0
- Core cycles: 7.99
- Reference cycles: 5.76
- UOPS_EXECUTED.THREAD: 21.0

VSCATTERQPD (VSIB_ZMM, K, ZMM) - Latency

Operands

Latency operand 1 → 1 (address, base register): ≤12

Latency operand 2 → 2: 2

Latency operand 3 → 1: ≤6

Latency operand 3 → 2: 7

Latency operand 1 → 1 (address, base register): ≤12

Experiment 1

Experiment 2 (with additional nop)

Latency operand 2 → 2: 2

Experiment 1

Experiment 2

Latency operand 3 → 1: ≤6

Experiment 1

Experiment 2

Latency operand 3 → 2: 7

Experiment 1