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From: | Weiwei Li |
Subject: | Re: [PATCH qemu v4 12/14] target/riscv: rvv: Add tail agnostic for vector reduction instructions |
Date: | Fri, 25 Mar 2022 18:47:32 +0800 |
User-agent: | Mozilla/5.0 (X11; Linux x86_64; rv:78.0) Gecko/20100101 Thunderbird/78.14.0 |
+ uint32_t vta = vext_vta(desc); \ uint32_t i; \ TD s1 = *((TD *)vs1 + HD(0)); \ \ @@ -4562,6 +4565,9 @@ void HELPER(NAME)(void *vd, void *v0, void *vs1, \ } \ *((TD *)vd + HD(0)) = s1; \ env->vstart = 0; \ + /* set tail elements to 1s */ \ + vext_set_elems_1s_fns[ctzl(esz)](vd, vta, 1, esz, \ + vlenb); \ } /* vd[0] = sum(vs1[0], vs2[*]) */ @@ -4667,6 +4673,9 @@ void HELPER(vfwredsum_vs_h)(void *vd, void *v0, void *vs1, { uint32_t vm = vext_vm(desc); uint32_t vl = env->vl; + uint32_t esz = sizeof(uint32_t); + uint32_t vlenb = env_archcpu(env)->cfg.vlen >> 3;
vlenb also can get from maxsz field of desc, that is
Regards,
Weiwei Li
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