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target/arm: Hoist address increment for vector memory ops

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This can reduce the number of opcodes required for certain
complex forms of load-multiple (e.g. ld4.16b).

Backports commit a7d8143aed2268f147cc1abfebc848ed6282a313 from qemu
This commit is contained in:
Richard Henderson 2018-11-10 09:39:10 -05:00 committed by Lioncash
parent d60fe610bb
commit 9bbc412c66
No known key found for this signature in database
GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 8 additions and 4 deletions
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12
qemu/target/arm/translate-a64.c
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@ -3087,7 +3087,7 @@ static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn)
bool is_store = !extract32(insn, 22, 1);
bool is_postidx = extract32(insn, 23, 1);
bool is_q = extract32(insn, 30, 1);
TCGv_i64 tcg_addr, tcg_rn;
TCGv_i64 tcg_addr, tcg_rn, tcg_ebytes;
int ebytes = 1 << size;
int elements = (is_q ? 128 : 64) / (8 << size);
@ -3152,6 +3152,7 @@ static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn)
tcg_rn = cpu_reg_sp(s, rn);
tcg_addr = tcg_temp_new_i64(tcg_ctx);
tcg_gen_mov_i64(tcg_ctx, tcg_addr, tcg_rn);
tcg_ebytes = tcg_const_i64(tcg_ctx, ebytes);
for (r = 0; r < rpt; r++) {
int e;
@ -3176,7 +3177,7 @@ static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn)
clear_vec_high(s, is_q, tt);
}
}
tcg_gen_addi_i64(tcg_ctx, tcg_addr, tcg_addr, ebytes);
tcg_gen_add_i64(tcg_ctx, tcg_addr, tcg_addr, tcg_ebytes);
tt = (tt + 1) % 32;
}
}
@ -3190,6 +3191,7 @@ static void disas_ldst_multiple_struct(DisasContext *s, uint32_t insn)
tcg_gen_add_i64(tcg_ctx, tcg_rn, tcg_rn, cpu_reg(s, rm));
}
}
tcg_temp_free_i64(tcg_ctx, tcg_ebytes);
tcg_temp_free_i64(tcg_ctx, tcg_addr);
}
@ -3233,7 +3235,7 @@ static void disas_ldst_single_struct(DisasContext *s, uint32_t insn)
bool replicate = false;
int index = is_q << 3 | S << 2 | size;
int ebytes, xs;
TCGv_i64 tcg_addr, tcg_rn;
TCGv_i64 tcg_addr, tcg_rn, tcg_ebytes;
switch (scale) {
case 3:
@ -3286,6 +3288,7 @@ static void disas_ldst_single_struct(DisasContext *s, uint32_t insn)
tcg_rn = cpu_reg_sp(s, rn);
tcg_addr = tcg_temp_new_i64(tcg_ctx);
tcg_gen_mov_i64(tcg_ctx, tcg_addr, tcg_rn);
tcg_ebytes = tcg_const_i64(tcg_ctx, ebytes);
for (xs = 0; xs < selem; xs++) {
if (replicate) {
@ -3328,7 +3331,7 @@ static void disas_ldst_single_struct(DisasContext *s, uint32_t insn)
do_vec_st(s, rt, index, tcg_addr, scale);
}
}
tcg_gen_addi_i64(tcg_ctx, tcg_addr, tcg_addr, ebytes);
tcg_gen_add_i64(tcg_ctx, tcg_addr, tcg_addr, tcg_ebytes);
rt = (rt + 1) % 32;
}
@ -3340,6 +3343,7 @@ static void disas_ldst_single_struct(DisasContext *s, uint32_t insn)
tcg_gen_add_i64(tcg_ctx, tcg_rn, tcg_rn, cpu_reg(s, rm));
}
}
tcg_temp_free_i64(tcg_ctx, tcg_ebytes);
tcg_temp_free_i64(tcg_ctx, tcg_addr);
}