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PicoBlaze 8-bit Embedded Microcontroller www.xilinx.com 19
UG129 (v1.1.2) June 24, 2008
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Chapter 3
PicoBlaze Instruction Set
Table 3-1 summarizes the entire PicoBlaze™ processor instruction set, which appears
alphabetically. Instructions are listed using the KCPSM3 syntax. If different, the pBlazIDE
syntax appears in parentheses. Each instruction includes an overview description, a
functional description, and how the ZERO and CARRY flags are affected. For more details
on each instruction, see Appendix C, “PicoBlaze Instruction Set and Event Reference.”
Table 3-1: PicoBlaze Instruction Set (alphabetical listing)
Instruction Description Function ZERO CARRY
ADD sX, kk Add register sX with literal kk sX Å sX + kk ? ?
ADD sX, sY Add register sX with register sY sX Å sX + sY ? ?
ADDCY sX, kk
(ADDC)
Add register sX with literal kk with
CARRY bit
sX Å sX + kk + CARRY ? ?
ADDCY sX, sY
(ADDC)
Add register sX with register sY with
CARRY bit
sX Å sX + sY + CARRY ? ?
AND sX, kk Bitwise AND register sX with literal kk sX Å sX AND kk ? 0
AND sX, sY Bitwise AND register sX with register sY sX Å sX AND sY ? 0
CALL aaa Unconditionally call subroutine at aaa TOS Å PC
PC Å aaa
--
CALL C, aaa If CARRY flag set, call subroutine at aaa If CARRY=1, {TOS Å PC,
PC Å aaa}
--
CALL NC, aaa If CARRY flag not set, call subroutine at
aaa
If CARRY=0, {TOS Å PC,
PC Å aaa}
--
CALL NZ, aaa If ZERO flag not set, call subroutine at aaa If ZERO=0, {TOS Å PC,
PC Å aaa}
--
CALL Z, aaa If ZERO flag set, call subroutine at aaa If ZERO=1, {TOS Å PC,
PC Å aaa}
--
COMPARE sX, kk
(COMP)
Compare register sX with literal kk. Set
CARRY and ZERO flags as appropriate.
Registers are unaffected.
If sX=kk, ZERO Å 1
If sX<kk, CARRY Å
1
??
COMPARE sX, sY
(COMP)
Compare register sX with register sY. Set
CARRY and ZERO flags as appropriate.
Registers are unaffected.
If sX=sY, ZERO Å 1
If sX<sY, CARRY Å 1
??
DISABLE INTERRUPT
(DINT)
Disable interrupt input INTERRUPT_ENABLE Å 0--