https://gcc.gnu.org/bugzilla/show_bug.cgi?id=117604
Bug ID: 117604
Summary: RISCV Generalized Reverse (grev, grevi, rev) are not
supported in gcc-14.1.0
Product: gcc
Version: 14.1.0
Status: UNCONFIRMED
Severity: normal
Priority: P3
Component: target
Assignee: unassigned at gcc dot gnu.org
Reporter: akhilesh.k at samsung dot com
Target Milestone: ---
During bit manipulation verification I observed grevw, greviw instructions are
not unimplemented.
https://raw.githubusercontent.com/riscv/riscv-bitmanip/master/bitmanip-draft.pdf
Seems Generalized Reverse (grev, grevi, rev) are not supported in gcc-14.1.0
in bit manipulation manual riscv-bitmanip-1.0.0.pdf Generalized Reverse is not
described but in previous versions like 0.92 described in details
Is Generalized Reverse feature under development or dropped ?
I am using gcc-14.1 release and used https://github.com/riscv/riscv-crypto
performance tool for bit manipulation.
/home/akhilesh.k/Toolchains/vd/gcc-14//bin/riscv64-none-linux-gnu-gcc -Wall
-I/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/include
-I/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/include/riscvcrypto/share
-O3 -march=rv64gcvzba_zbb_zbc_zbs_zknd_zkne_zksed_zknh_zbkb -mabi=lp64d
-D__ZSCRYPTO=1 -c -o
/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/obj/sm3/reference/sm3.o
sm3/reference/sm3.c
/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/include/riscvcrypto/share/rvintrin.h:
Assembler messages:
/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/include/riscvcrypto/share/rvintrin.h:151:
Error: unrecognized opcode `greviw t3,t3,24'
/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/include/riscvcrypto/share/rvintrin.h:151:
Error: unrecognized opcode `greviw t4,t4,24'
/home/akhilesh.k/git/riscv-crypto/build/benchmarks/rv64-zscrypto/include/riscvcrypto/share/rvintrin.h:151:
Error: unrecognized opcode `greviw t3,t3,24'
