Espressif ESP32-S2 Programming Manual page 1493

Chapter 4. API Guides
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MOVE
MOVE
STL
3:
MOVE
STL
STH –Store data to the high 16 bits of 32-bits memory
Syntax STH Rsrc, Rdst, offset, Label
Operands
• Rsrc –Register R[0..3], holds the 16-bit value to store
• Rdst –Register R[0..3], address of the destination, in 32-bit words
• Offset –11-bit signed value, offset in bytes
• Label –2-bit user defined unsigned value
Cycles 4 cycles to execute, 4 cycles to fetch next instruction
Description The instruction stores the 16-bit value of Rsrc to the high half-word of memory with address
Rdst+offset:
Mem[Rdst + offset
Mem[Rdst + offset
Examples:
1: STH R1, R2,
2: .data
Addr1: .word
.set
.text
MOVE
MOVE
STH
3:
MOVE
STH
STO –Set offset value for auto increment operation
Syntax STO offset
Operands
• Offset –11-bit signed value, offset in bytes
Cycles 4 cycles to execute, 4 cycles to fetch next instruction
Description The instruction set 16-bit value to the offset register:
offset = value/
Examples:
1: STO 0x12
2: .data
Addr1: .word
.set
Espressif Systems
//Text section definition
R1, 1 // R1
R2, Addr1 // R2
R1, R2, offs // MEM[R2
// MEM[Addr1
R1, 1 //
R1, R2, 0x12,1 //
/ 4]{31:16} = {Rsrc[15:0]}
/ 4]{31:16} = {Label[1:0],Rsrc[13:0]}
0x12 //MEM[R2+0x12][31:16]
//Data section definition
123 // Define label Addr1
offs, 0x00 // Define constant offs
//Text section definition
R1, 1 // R1
R2, Addr1 // R2
R1, R2, offs // MEM[R2
// MEM[Addr1
R1, 1 //
R1, R2, 0x12, 1 //MEM[R2+0x12] 0x4001xxxx
4
// Offset
//Data section definition
123 // Define label Addr1
offs, 0x00 // Define constant offs
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= 1
= Addr1
+ 0] = R1
+ 0] will be
R1 = 1
MEM[R2+0x12] 0xxxxx4001
= R1
16 bit
= 1
= Addr1
+ 0] = R1
+ 0] will be
R1 = 1
= 0x12/4
16 bit
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32'hxxxx0001
32'h0001xxxx
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Release v4.4