VRSQRTSS (XMM, XMM, XMM)

Summary:	"Compute Reciprocal of Square Root of Scalar Single-Precision Floating-Point Value"
Reference:	https://www.felixcloutier.com/x86/RSQRTSS.html
Extension:	AVX
Category:	AVX
ISA-Set:	AVX
CPL:	3
iform:	VRSQRTSS_XMMdq_XMMdq_XMMd
iclass:	VRSQRTSS
ASM:	VRSQRTSS

Operands

Operand 1 (w): Register (XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7, XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15)
Operand 2 (r): Register (XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7, XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15)
Operand 3 (r): Register (XMM0, XMM1, XMM2, XMM3, XMM4, XMM5, XMM6, XMM7, XMM8, XMM9, XMM10, XMM11, XMM12, XMM13, XMM14, XMM15)

Available performance data

Alder Lake-P
Alder Lake-E
Rocket Lake
Tiger Lake
Ice Lake
Cascade Lake
Cannon Lake
Skylake-X
Coffee Lake
Kaby Lake
Skylake
Broadwell
Haswell
Ivy Bridge
Sandy Bridge
AMD Zen 4
AMD Zen 3
AMD Zen 2
AMD Zen+

Alder Lake-P

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Alder Lake-E

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Microcode Sequencer (MS): 0

Rocket Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Tiger Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Ice Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Documentation

Latency: 4.0
Throughput: 1.0

Cascade Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Cannon Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Skylake-X

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

IACA 2.3

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00
Number of μops: 1
Port usage: 1*p0

IACA 3.0

Throughput
- Computed from the port usage: 1.00
- IACA: 0.98
Number of μops: 1
Port usage: 1*p0

Coffee Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Kaby Lake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

Skylake

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

IACA 2.3

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00
Number of μops: 1
Port usage: 1*p0

IACA 3.0

Throughput
- Computed from the port usage: 1.00
- IACA: 0.98
Number of μops: 1
Port usage: 1*p0

Broadwell

Measurements

Latencies
- Latency operand 2 → 1: ≤5
- Latency operand 3 → 1: ≤5
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

IACA 2.2

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.3

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00
Number of μops: 1
Port usage: 1*p0

IACA 3.0

Throughput
- Computed from the port usage: 1.00
- IACA: 0.99
Number of μops: 1
Port usage: 1*p0

Haswell

Measurements

Latencies
- Latency operand 2 → 1: ≤5
- Latency operand 3 → 1: ≤5
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

IACA 2.1

Latency: 5
Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.2

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.3

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00
Number of μops: 1
Port usage: 1*p0

IACA 3.0

Throughput
- Computed from the port usage: 1.00
- IACA: 0.98
Number of μops: 1
Port usage: 1*p0

Ivy Bridge

Measurements

Latencies
- Latency operand 2 → 1: ≤5
- Latency operand 3 → 1: ≤5
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

IACA 2.1

Latency: 5
Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.2

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.3

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00
Number of μops: 1
Port usage: 1*p0

Sandy Bridge

Measurements

Latencies
- Latency operand 2 → 1: ≤5
- Latency operand 3 → 1: ≤5
Throughput
- Computed from the port usage: 1.00
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
- Retire slots: 1
- Decoded (MITE): 1
- Microcode Sequencer (MS): 0
Port usage: 1*p0

IACA 2.1

Latency: 5
Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.2

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00 (with the -no_interiteration flag: 1.00)
Number of μops: 1
Port usage: 1*p0

IACA 2.3

Throughput
- Computed from the port usage: 1.00
- IACA: 1.00
Number of μops: 1
Port usage: 1*p0

AMD Zen 4

Measurements

Latencies
- Latency operand 2 → 1: ≤4
- Latency operand 3 → 1: ≤4
Throughput
- Computed from the port usage: 0.50
- Measured (loop): 0.50
- Measured (unrolled): 0.50
Number of μops
- Executed: 1
Port usage: 1*FP01

AMD Zen 3

Measurements

Latencies
- Latency operand 2 → 1: ≤3
- Latency operand 3 → 1: ≤3
Throughput
- Computed from the port usage: 0.50
- Measured (loop): 0.50
- Measured (unrolled): 0.50
Number of μops
- Executed: 1
Port usage: 1*FP01

Documentation

Latency: 3
Throughput: 0.50
Number of μops: 1
Port usage: FP0/1

AMD Zen 2

Measurements

Latencies
- Latency operand 2 → 1: ≤5
- Latency operand 3 → 1: ≤5
Throughput
- Computed from the port usage: 0.50
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
Port usage: 1*FP01

Documentation

Latency: 5
Throughput: 0.50
Number of μops: 1
Port usage: FP0/1

AMD Zen+

Measurements

Latencies
- Latency operand 2 → 1: ≤5
- Latency operand 3 → 1: ≤5
Throughput
- Computed from the port usage: 0.50
- Measured (loop): 1.00
- Measured (unrolled): 1.00
Number of μops
- Executed: 1
Port usage: 1*FP01

Documentation

Latency: 5
Throughput: 0.50
Number of μops: 1
Port usage: FP0/1