tcg/riscv64: Implement revbit8
Reviewed-by: Alistair Francis <alistair.francis@wdc.com> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
Richard Henderson committed
Aug 10, 2026 at 11:55 UTC
9d2e171fd606dc7c7b93bd8648a40e3cf745b22a
1 file changed
+16
-1
tcg/riscv64/tcg-target.c.inc
+16
-1
@@ -246,6 +246,9 @@ typedef enum {
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OPC_XNOR = 0x40004033,
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OPC_ZEXT_H = 0x0800403b,
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+ /* Zbkb: Bit Manipulation for Cryptography */
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+ OPC_BREV8 = 0x68705013,
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+
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/* Zicond: integer conditional operations */
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OPC_CZERO_EQZ = 0x0e005033,
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OPC_CZERO_NEZ = 0x0e007033,
@@ -2469,8 +2472,20 @@ static const TCGOutOpUnary outop_bswap64 = {
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.out_rr = tgen_bswap64,
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};
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+static TCGConstraintSetIndex cset_revbit8(TCGType type, unsigned flags)
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+{
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+ return cpuinfo & CPUINFO_ZBKB ? C_O1_I1(r, r) : C_NotImplemented;
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+}
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+
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+static void tgen_revbit8(TCGContext *s, TCGType type, TCGReg a0, TCGReg a1)
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+{
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+ tcg_out_opc_imm(s, OPC_BREV8, a0, a1, 0);
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+}
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+
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static const TCGOutOpUnary outop_revbit8 = {
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- .base.static_constraint = C_NotImplemented,
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+ .base.static_constraint = C_Dynamic,
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+ .base.dynamic_constraint = cset_revbit8,
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+ .out_rr = tgen_revbit8,
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};
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static const TCGOutOpBswap outop_revbit32 = {