derek.holloway
7502bf64a4
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33 lines
1.3 KiB
ArmAsm
33 lines
1.3 KiB
ArmAsm
## A snippet from https://github.com/riscv/riscv-v-spec.
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# RUN: llvm-mc -triple=riscv64 -filetype=obj --mattr=+v < %s \
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# RUN: | llvm-objdump -d --mattr=+v - \
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# RUN: | FileCheck %s --check-prefix=CHECK-INST
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loop:
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vsetvli a3, a0, e16,m4,ta,ma # vtype = 16-bit integer vectors
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# CHECK-INST: 0ca576d7 vsetvli a3, a0, e16, m4, ta, ma
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vle16.v v4, (a1) # Get 16b vector
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# CHECK-INST: 0205d207 vle16.v v4, (a1)
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slli t1, a3, 1 # Multiply length by two bytes/element
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# CHECK-INST: 00169313 slli t1, a3, 0x1
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add a1, a1, t1 # Bump pointer
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# CHECK-INST: 006585b3 add a1, a1, t1
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vwmul.vx v8, v4, x10 # 32b in <v8--v15>
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# CHECK-INST: ee456457 vwmul.vx v8, v4, a0
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vsetvli x0, a0, e32,m8,ta,ma # Operate on 32b values
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# CHECK-INST: 0d357057 vsetvli zero, a0, e32, m8, ta, ma
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vsrl.vi v8, v8, 3
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# CHECK-INST: a281b457 vsrl.vi v8, v8, 0x3
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vse32.v v8, (a2) # Store vector of 32b
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# CHECK-INST: 02066427 vse32.v v8, (a2)
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slli t1, a3, 2 # Multiply length by four bytes/element
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# CHECK-INST: 00269313 slli t1, a3, 0x2
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add a2, a2, t1 # Bump pointer
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# CHECK-INST: 00660633 add a2, a2, t1
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sub a0, a0, a3 # Decrement count
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# CHECK-INST: 40d50533 sub a0, a0, a3
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bnez a0, loop # Any more?
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# CHECK-INST: fc051ae3 bnez a0, 0x0
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