Commit 0db67e1c authored by LIU Zhiwei's avatar LIU Zhiwei Committed by Alistair Francis
Browse files

target/riscv: vmfirst find-first-set mask bit 



Signed-off-by: default avatarLIU Zhiwei <zhiwei_liu@c-sky.com>
Reviewed-by: default avatarRichard Henderson <richard.henderson@linaro.org>
Message-Id: <20200701152549.1218-52-zhiwei_liu@c-sky.com>
Signed-off-by: default avatarAlistair Francis <alistair.francis@wdc.com>
parent 2e88f551

target/riscv/helper.h

+2 −0
Original line number Diff line number Diff line
@@ -1103,3 +1103,5 @@ DEF_HELPER_6(vmornot_mm, void, ptr, ptr, ptr, ptr, env, i32) 
DEF_HELPER_6(vmxnor_mm, void, ptr, ptr, ptr, ptr, env, i32)



DEF_HELPER_4(vmpopc_m, tl, ptr, ptr, env, i32)



DEF_HELPER_4(vmfirst_m, tl, ptr, ptr, env, i32)

target/riscv/insn32.decode

+1 −0
Original line number Diff line number Diff line
@@ -556,6 +556,7 @@ vmnor_mm 011110 - ..... ..... 010 ..... 1010111 @r 
vmornot_mm      011100 - ..... ..... 010 ..... 1010111 @r

vmxnor_mm       011111 - ..... ..... 010 ..... 1010111 @r

vmpopc_m        010100 . ..... ----- 010 ..... 1010111 @r2_vm

vmfirst_m       010101 . ..... ----- 010 ..... 1010111 @r2_vm



vsetvli         0 ........... ..... 111 ..... 1010111  @r2_zimm

vsetvl          1000000 ..... ..... 111 ..... 1010111  @r

target/riscv/insn_trans/trans_rvv.inc.c

+32 −0
Original line number Diff line number Diff line
@@ -2421,3 +2421,35 @@ static bool trans_vmpopc_m(DisasContext *s, arg_rmr *a) 
    }

    return false;

}



/* vmfirst find-first-set mask bit */

static bool trans_vmfirst_m(DisasContext *s, arg_rmr *a)

{

    if (vext_check_isa_ill(s)) {

        TCGv_ptr src2, mask;

        TCGv dst;

        TCGv_i32 desc;

        uint32_t data = 0;

        data = FIELD_DP32(data, VDATA, MLEN, s->mlen);

        data = FIELD_DP32(data, VDATA, VM, a->vm);

        data = FIELD_DP32(data, VDATA, LMUL, s->lmul);



        mask = tcg_temp_new_ptr();

        src2 = tcg_temp_new_ptr();

        dst = tcg_temp_new();

        desc = tcg_const_i32(simd_desc(0, s->vlen / 8, data));



        tcg_gen_addi_ptr(src2, cpu_env, vreg_ofs(s, a->rs2));

        tcg_gen_addi_ptr(mask, cpu_env, vreg_ofs(s, 0));



        gen_helper_vmfirst_m(dst, mask, src2, cpu_env, desc);

        gen_set_gpr(a->rd, dst);



        tcg_temp_free_ptr(mask);

        tcg_temp_free_ptr(src2);

        tcg_temp_free(dst);

        tcg_temp_free_i32(desc);

        return true;

    }

    return false;

}

target/riscv/vector_helper.c

+19 −0
Original line number Diff line number Diff line
@@ -4562,3 +4562,22 @@ target_ulong HELPER(vmpopc_m)(void *v0, void *vs2, CPURISCVState *env, 
    }

    return cnt;

}



/* vmfirst find-first-set mask bit*/

target_ulong HELPER(vmfirst_m)(void *v0, void *vs2, CPURISCVState *env,

                               uint32_t desc)

{

    uint32_t mlen = vext_mlen(desc);

    uint32_t vm = vext_vm(desc);

    uint32_t vl = env->vl;

    int i;



    for (i = 0; i < vl; i++) {

        if (vm || vext_elem_mask(v0, mlen, i)) {

            if (vext_elem_mask(vs2, mlen, i)) {

                return i;

            }

        }

    }

    return -1LL;

}