Espressif ESP32-S2 Programming Manual page 1491

Chapter 4. API Guides
1: OR R1, R2, R3
2: OR R1, R2,
3: .set value1,
OR R1, R2, value1
4: .global label
OR R1, R2, label
...
label: nop
LSH - Logical Shift Left
Syntax LSH Rdst, Rsrc1, Rsrc2
LSH Rdst, Rsrc1, imm
Operands
• Rdst - Register R[0..3]
• Rsrc1 - Register R[0..3]
• Rsrc2 - Register R[0..3]
• Imm - 16-bit signed value
Cycles 2 cycles to execute, 4 cycles to fetch next instruction
Description The instruction does logical shift to left of source register to number of bits from another source register
or 16-bit signed value and store result to the destination register.
Examples:
1: LSH R1, R2, R3
2: LSH R1, R2,
3: .set value1,
LSH R1, R2, value1
4: .global label
LSH R1, R2, label
...
label: nop
RSH - Logical Shift Right
Syntax RSH Rdst, Rsrc1, Rsrc2
RSH Rdst, Rsrc1, imm
Operands Rdst - Register R[0..3] Rsrc1 - Register R[0..3] Rsrc2 - Register R[0..3] Imm - 16-bit signed value
Cycles 2 cycles to execute, 4 cycles to fetch next instruction
Description The instruction does logical shift to right of source register to number of bits from another source
register or 16-bit signed value and store result to the destination register.
Examples:
1: RSH R1, R2, R3
2: RSH R1, R2,
3: .set value1,
RSH R1, R2, value1
4: .global label
Espressif Systems
//R1 =
0x1234 //R1 =
0x03 //constant
//R1 =
//declaration of variable label
//R1 =
//definition of variable label
//R1
0x03 //R1
0x03 //constant
//R1
//declaration of variable label
//R1
//definition of variable label
//R1
0x03 //R1
0x03 //constant
//R1
//declaration of variable label
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R2 \| R3
R2 \| 0x1234
value1=0x03
R2 \| value1
R2 \|label
= R2 << R3
= R2 << 0x03
value1=0x03
= R2 << value1
= R2 << label
= R2 >> R3
= R2 >> 0x03
value1=0x03
= R2 >> value1
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Release v4.4