Epson CMOS 32-Bit Single Chip Microcomputer S1C33L03 Manual de usuario Pagina 76

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7 DETAILS OF INSTRUCTIONS
68
EPSON
S1C33 FAMILY C33 PE CORE MANUAL
bnot [%rb], imm3
Function
Bit negation
Standard) B[
rb](imm3) !B[rb](imm3)
Extension 1) B[
rb + imm13](imm3) !B[rb + imm13](imm3)
Extension 2) B[
rb + imm26](imm3) !B[rb + imm26](imm3)
Code
15 12 11 8 7 4 3 2 0
1 0 1 1 0 1 0 0
r b 0 imm3
0xB4__
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Flag
IE C V Z N
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Mode
Src: Immediate data (unsigned)
Dst: Register indirect
%rb = %r0 to %r15
CLK
Three cycles (four cycles when ext is used)
Description
(1) Standard
bnot [
%rb],imm3 ; B[rb](imm3) !B[rb](imm3)
Reverses a data bit of the byte data in the address specified with the rb register. The 3-bit
immediate imm3 specifies the bit number to be reversed (70).
(2) Extension 1
ext
imm13
bnot [
%rb],imm3 ; B[rb + imm13](imm3) !B[rb + imm13](imm3)
The ext instruction changes the addressing mode to register indirect addressing with
displacement. The extended instruction reverses the data bit specified with the imm3 in the
address specified by adding the 13-bit immediate
imm13 to the contents of the rb register. It
does not change the contents of the rb register.
(3) Extension 2
ext
imm13 ; = imm26(25:13)
ext
imm13 ; = imm26(12:0)
bnot [
%rb],imm3 ; B[rb + imm26](imm3) !B[rb + imm26](imm3)
The ext instructions change the addressing mode to register indirect addressing with
displacement. The extended instruction reverses the data bit specified with the imm3 in the
address specified by adding the 26-bit immediate
imm26 to the contents of the rb register. It
does not change the contents of the rb register.
Example
(1) ld.w %r0,[%sp+0x10] ; Sets the memory address to be accessed
; to the R0 register.
bnot [%r0],0x0 ; Reverses Bit 0 of data in the specified
; address.
(2)
ext 0x1
bnot [%r0],0x7 ; Reverses Bit 7 of data in the following
; address.
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