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target/riscv: Add orc.b instruction for Zbb, removing gorc/gorci

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The 1.0.0 version of Zbb does not contain gorc/gorci.  Instead, a
orc.b instruction (equivalent to the orc.b pseudo-instruction built on
gorci from pre-0.93 draft-B) is available, mainly targeting
string-processing workloads.

This commit adds the new orc.b instruction and removed gorc/gorci.

Signed-off-by: Philipp Tomsich <philipp.tomsich@vrull.eu>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Reviewed-by: Alistair Francis <alistair.francis@wdc.com>
Message-id: 20210911140016.834071-12-philipp.tomsich@vrull.eu
Signed-off-by: Alistair Francis <alistair.francis@wdc.com>
This commit is contained in:
Philipp Tomsich 2021-09-11 16:00:11 +02:00 • committed by Alistair Francis
parent 16c38f36f5
commit d7a4fcb034
4 changed files with 18 additions and 55 deletions
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26
target/riscv/bitmanip_helper.c
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@ -64,32 +64,6 @@ target_ulong HELPER(grevw)(target_ulong rs1, target_ulong rs2)
return do_grev(rs1, rs2, 32);
}
static target_ulong do_gorc(target_ulong rs1,
target_ulong rs2,
int bits)
{
target_ulong x = rs1;
int i, shift;
for (i = 0, shift = 1; shift < bits; i++, shift <<= 1) {
if (rs2 & shift) {
x |= do_swap(x, adjacent_masks[i], shift);
}
}
return x;
}
target_ulong HELPER(gorc)(target_ulong rs1, target_ulong rs2)
{
return do_gorc(rs1, rs2, TARGET_LONG_BITS);
}
target_ulong HELPER(gorcw)(target_ulong rs1, target_ulong rs2)
{
return do_gorc(rs1, rs2, 32);
}
target_ulong HELPER(clmul)(target_ulong rs1, target_ulong rs2)
{
target_ulong result = 0;