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target/ppc: implement addg6s 

Implements the following Power ISA v2.06 instruction:
addg6s: Add and Generate Sixes

Signed-off-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Signed-off-by: Víctor Colombo <victor.colombo@eldorado.org.br>
Reviewed-by: Víctor Colombo <victor.colombo@eldorado.org.br>
Message-Id: <20220629162904.105060-10-victor.colombo@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Matheus Ferst 2022-06-29 13:29:02 -03:00 committed by Daniel Henrique Barboza
parent 4dc5f8abdc
commit 6addef4d27
2 changed files with 41 additions and 0 deletions
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4
target/ppc/insn32.decode
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@ -311,6 +311,10 @@ CNTTZDM 011111 ..... ..... ..... 1000111011 - @X
PDEPD 011111 ..... ..... ..... 0010011100 - @X
PEXTD 011111 ..... ..... ..... 0010111100 - @X
## BCD Assist
ADDG6S 011111 ..... ..... ..... - 001001010 - @X
### Float-Point Load Instructions
LFS 110000 ..... ..... ................ @D

37
target/ppc/translate/fixedpoint-impl.c.inc
View File

@ -492,3 +492,40 @@ static bool trans_PEXTD(DisasContext *ctx, arg_X *a)
#endif
return true;
}
static bool trans_ADDG6S(DisasContext *ctx, arg_X *a)
{
const uint64_t carry_bits = 0x1111111111111111ULL;
TCGv t0, t1, carry, zero = tcg_constant_tl(0);
REQUIRE_INSNS_FLAGS2(ctx, BCDA_ISA206);
t0 = tcg_temp_new();
t1 = tcg_const_tl(0);
carry = tcg_const_tl(0);
for (int i = 0; i < 16; i++) {
tcg_gen_shri_tl(t0, cpu_gpr[a->ra], i * 4);
tcg_gen_andi_tl(t0, t0, 0xf);
tcg_gen_add_tl(t1, t1, t0);
tcg_gen_shri_tl(t0, cpu_gpr[a->rb], i * 4);
tcg_gen_andi_tl(t0, t0, 0xf);
tcg_gen_add_tl(t1, t1, t0);
tcg_gen_andi_tl(t1, t1, 0x10);
tcg_gen_setcond_tl(TCG_COND_NE, t1, t1, zero);
tcg_gen_shli_tl(t0, t1, i * 4);
tcg_gen_or_tl(carry, carry, t0);
}
tcg_gen_xori_tl(carry, carry, (target_long)carry_bits);
tcg_gen_muli_tl(cpu_gpr[a->rt], carry, 6);
tcg_temp_free(t0);
tcg_temp_free(t1);
tcg_temp_free(carry);
return true;
}