vmsbc.vv
No synopsis available.
This instruction is defined by:
-
V, version >= 0
This instruction is included in the following profiles:
-
RVA22S64 (Optional)
-
RVA22U64 (Optional)
Decode Variables
Bits<5> vs2 = $encoding[24:20];
Bits<5> vs1 = $encoding[19:15];
Bits<5> vd = $encoding[11:7];
Execution
-
IDL
-
Sail
{
let SEW = get_sew();
let LMUL_pow = get_lmul_pow();
let num_elem = get_num_elem(LMUL_pow, SEW);
if illegal_vd_unmasked() then { handle_illegal(); return RETIRE_FAIL };
let 'n = num_elem;
let 'm = SEW;
let vs1_val : vector('n, dec, bits('m)) = read_vreg(num_elem, SEW, LMUL_pow, vs1);
let vs2_val : vector('n, dec, bits('m)) = read_vreg(num_elem, SEW, LMUL_pow, vs2);
let vd_val : vector('n, dec, bool) = read_vmask(num_elem, 0b0, vd);
result : vector('n, dec, bool) = undefined;
mask : vector('n, dec, bool) = undefined;
(result, mask) = init_masked_result_carry(num_elem, SEW, LMUL_pow, vd_val);
foreach (i from 0 to (num_elem - 1)) {
if mask[i] then {
let res : bool = match funct6 {
VVMC_VMADC => unsigned(vs2_val[i]) + unsigned(vs1_val[i]) > 2 ^ SEW - 1,
VVMC_VMSBC => unsigned(vs2_val[i]) - unsigned(vs1_val[i]) < 0
};
result[i] = res
}
};
write_vmask(num_elem, vd, result);
vstart = zeros();
RETIRE_SUCCESS
}