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target/arm: Update PFIRST, PNEXT for pred_desc

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These two were odd, in that do_pfirst_pnext passed the
count of 64-bit words rather than bytes. Change to pass
the standard pred_full_reg_size to avoid confusion.

Backports 86300b5d044064046395ae8ed605cc19e63f2a7c
This commit is contained in:
Richard Henderson 2021-03-04 15:09:45 -05:00 committed by Lioncash
parent 4ef4735cd3
commit fac4e416c9
2 changed files with 7 additions and 6 deletions
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7
qemu/target/arm/sve_helper.c
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@ -888,8 +888,9 @@ static intptr_t last_active_element(uint64_t *g, intptr_t words, intptr_t esz)
return (intptr_t)-1 << esz;
}
uint32_t HELPER(sve_pfirst)(void *vd, void *vg, uint32_t words)
uint32_t HELPER(sve_pfirst)(void *vd, void *vg, uint32_t pred_desc)
{
intptr_t words = DIV_ROUND_UP(FIELD_EX32(pred_desc, PREDDESC, OPRSZ), 8);
uint32_t flags = PREDTEST_INIT;
uint64_t *d = vd, *g = vg;
intptr_t i = 0;
@ -913,8 +914,8 @@ uint32_t HELPER(sve_pfirst)(void *vd, void *vg, uint32_t words)
uint32_t HELPER(sve_pnext)(void *vd, void *vg, uint32_t pred_desc)
{
intptr_t words = extract32(pred_desc, 0, SIMD_OPRSZ_BITS);
intptr_t esz = extract32(pred_desc, SIMD_DATA_SHIFT, 2);
intptr_t words = DIV_ROUND_UP(FIELD_EX32(pred_desc, PREDDESC, OPRSZ), 8);
intptr_t esz = FIELD_EX32(pred_desc, PREDDESC, ESZ);
uint32_t flags = PREDTEST_INIT;
uint64_t *d = vd, *g = vg, esz_mask;
intptr_t i, next;

6
qemu/target/arm/translate-sve.c
View file

@ -1545,10 +1545,10 @@ static bool do_pfirst_pnext(DisasContext *s, arg_rr_esz *a,
TCGv_ptr t_pd = tcg_temp_new_ptr(tcg_ctx);
TCGv_ptr t_pg = tcg_temp_new_ptr(tcg_ctx);
TCGv_i32 t;
unsigned desc;
unsigned desc = 0;
desc = DIV_ROUND_UP(pred_full_reg_size(s), 8);
desc = deposit32(desc, SIMD_DATA_SHIFT, 2, a->esz);
desc = FIELD_DP32(desc, PREDDESC, OPRSZ, pred_full_reg_size(s));
desc = FIELD_DP32(desc, PREDDESC, ESZ, a->esz);
tcg_gen_addi_ptr(tcg_ctx, t_pd, tcg_ctx->cpu_env, pred_full_reg_offset(s, a->rd));
tcg_gen_addi_ptr(tcg_ctx, t_pg, tcg_ctx->cpu_env, pred_full_reg_offset(s, a->rn));