On 7/26/23 02:21, Kito Cheng via Gcc-patches wrote:
My understanding is the semantic is slightly different, brev8 is only
the bit reverse within each byte, but bitreverse means did bit reverse
for the whole content of the mode, e.g. riscv_brev8_si will bit
reserved within 32 bit.
Using RV32 a
My understanding is the semantic is slightly different, brev8 is only
the bit reverse within each byte, but bitreverse means did bit reverse
for the whole content of the mode, e.g. riscv_brev8_si will bit
reserved within 32 bit.
Using RV32 as example:
UNSPEC_BREV8:
rd[0...7] = rs[7...0]
rd[8...15
This small patch replaces unspec opcode with bitreverse in
riscv_brev8_ insn.
gcc/ChangeLog:
* config/riscv/crypto.md (UNSPEC_BREV8): Remov.
(riscv_brev8_): Use bitreverse opcode.
--
With the best regards
Jivan Hakobyan
diff --git a/gcc/config/riscv/crypto.md b/gcc/config/riscv/
