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How do I write rotation Operation for the Risc-V(Assembly Language) Do we have any command for it like we have have in 8086?
Assembly RISCV rotation instructionHow does the stack work in assembly language?What does multicore assembly language look like?Simple question on 8086 assembly languageHow do I achieve the theoretical maximum of 4 FLOPs per cycle?Replacing a 32-bit loop counter with 64-bit introduces crazy performance deviationsChange Directory DOS 8086 Assembly LanguageRotate only 4 bits in a byte in Assembly 8086Writing in assembly language, how does compatibility work?MASM (8086) assembly language line continuationAssembly language for the 8086 microprocessor
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I have worked with assembly language of 8086 previously, rotation operation in 8086 was just a command. But I can't find a specific keyword for rotation operation in Risc-V assembly language.
assembly riscv
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
add a comment |
I have worked with assembly language of 8086 previously, rotation operation in 8086 was just a command. But I can't find a specific keyword for rotation operation in Risc-V assembly language.
assembly riscv
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
3
The RISC-V Bitmanip Extension has rotates
– harold
Mar 28 at 11:17
add a comment |
I have worked with assembly language of 8086 previously, rotation operation in 8086 was just a command. But I can't find a specific keyword for rotation operation in Risc-V assembly language.
assembly riscv
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
I have worked with assembly language of 8086 previously, rotation operation in 8086 was just a command. But I can't find a specific keyword for rotation operation in Risc-V assembly language.
assembly riscv
assembly riscv
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
asked Mar 28 at 9:28
haseeb syedhaseeb syed
11 bronze badge
11 bronze badge
3
The RISC-V Bitmanip Extension has rotates
– harold
Mar 28 at 11:17
add a comment |
3
The RISC-V Bitmanip Extension has rotates
– harold
Mar 28 at 11:17
3
3
The RISC-V Bitmanip Extension has rotates
– harold
Mar 28 at 11:17
The RISC-V Bitmanip Extension has rotates
– harold
Mar 28 at 11:17
add a comment |
1 Answer
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It looks like extension "B" should define such an instruction eventually.
Until then you have to compose it using left and right shifts.
Here's an equivalent of the MIPS32R2 rotrv instruction (rotate right by variable count):
rotrv:
subu neg_count, zero, count
srlv tmp1, src, count
sllv tmp2, src, neg_count
or dst, tmp1, tmp2
You can do the same on riscv.
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
add a comment |
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It looks like extension "B" should define such an instruction eventually.
Until then you have to compose it using left and right shifts.
Here's an equivalent of the MIPS32R2 rotrv instruction (rotate right by variable count):
rotrv:
subu neg_count, zero, count
srlv tmp1, src, count
sllv tmp2, src, neg_count
or dst, tmp1, tmp2
You can do the same on riscv.
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
add a comment |
It looks like extension "B" should define such an instruction eventually.
Until then you have to compose it using left and right shifts.
Here's an equivalent of the MIPS32R2 rotrv instruction (rotate right by variable count):
rotrv:
subu neg_count, zero, count
srlv tmp1, src, count
sllv tmp2, src, neg_count
or dst, tmp1, tmp2
You can do the same on riscv.
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
add a comment |
It looks like extension "B" should define such an instruction eventually.
Until then you have to compose it using left and right shifts.
Here's an equivalent of the MIPS32R2 rotrv instruction (rotate right by variable count):
rotrv:
subu neg_count, zero, count
srlv tmp1, src, count
sllv tmp2, src, neg_count
or dst, tmp1, tmp2
You can do the same on riscv.
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
It looks like extension "B" should define such an instruction eventually.
Until then you have to compose it using left and right shifts.
Here's an equivalent of the MIPS32R2 rotrv instruction (rotate right by variable count):
rotrv:
subu neg_count, zero, count
srlv tmp1, src, count
sllv tmp2, src, neg_count
or dst, tmp1, tmp2
You can do the same on riscv.
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
answered Mar 28 at 11:12
Alexey FrunzeAlexey Frunze
54k9 gold badges58 silver badges134 bronze badges
54k9 gold badges58 silver badges134 bronze badges
add a comment |
add a comment |
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3
The RISC-V Bitmanip Extension has rotates
– harold
Mar 28 at 11:17