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problem on instruction "addi"
by Unknown on Jan 2, 2004 |
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Hi all,
I have problem on using the instrucion of addi. For the instruction set, the immediate value is just 16 bit only. If some one want to add an immediate value that occupys more that 16 bit width? How they can do that? Is it the only way? They just put the immediate value into a general purpose register first, then it adds the values in two 32 bit general register? Thank you very much. Stephen |
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problem on instruction "addi"
by Unknown on Jan 2, 2004 |
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* whli_interqos@yahoo.com.hk (whli_interqos@yahoo.com.hk) wrote:
Hi all,
I have problem on using the instrucion of addi. For the instruction set, the immediate value is just 16 bit only. If some one want to add an immediate value that occupys more that 16 bit width? How they can do you've just answerd your question i think. you can't do that in orbis32 instruction set, but you can:
that? Is it the only way? They just put the immediate value into a
general purpose register first, then it adds the values in two 32 bit general register? regards, p. |
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problem on instruction "addi"
by Unknown on Jan 5, 2004 |
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Hey !
on most 32-bit RISC architectures today you can only add 16-bit immediate.
To add 32-bit number you have to use a register.
regards,
Damjan
----- Original Message -----
From: whli_interqos@yahoo.com.hk>
To: openrisc@opencores.org>
Sent: Friday, January 02, 2004 7:23 AM
Subject: [openrisc] problem on instruction "addi"
Hi all,
I have problem on using the instrucion of addi. For the instruction
set, the immediate value is just 16 bit only. If some one want to add an
immediate value that occupys more that 16 bit width? How they can do
that? Is it the only way? They just put the immediate value into a
general purpose register first, then it adds the values in two 32 bit
general register? Thank you very much.
Stephen
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