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target/ppc: Implement mffscdrn[i] instructions 

Signed-off-by: Víctor Colombo <victor.colombo@eldorado.org.br>
Reviewed-by: Matheus Ferst <matheus.ferst@eldorado.org.br>
Message-Id: <20220629162904.105060-7-victor.colombo@eldorado.org.br>
Signed-off-by: Daniel Henrique Barboza <danielhb413@gmail.com>
This commit is contained in:
Víctor Colombo 2022-06-29 13:28:59 -03:00 committed by Daniel Henrique Barboza
parent f80d04d548
commit 6cef305fe7
2 changed files with 46 additions and 0 deletions
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5
target/ppc/insn32.decode
View File

@ -133,6 +133,9 @@
&X_imm2 rt imm
@X_imm2 ...... rt:5 ..... ... imm:2 .......... . &X_imm2
&X_imm3 rt imm
@X_imm3 ...... rt:5 ..... .. imm:3 .......... . &X_imm3
%x_xt 0:1 21:5
&X_imm5 xt imm:uint8_t vrb
@X_imm5 ...... ..... imm:5 vrb:5 .......... . &X_imm5 xt=%x_xt
@ -348,7 +351,9 @@ SETNBCR 011111 ..... ..... ----- 0111100000 - @X_bi
MFFS 111111 ..... 00000 ----- 1001000111 . @X_t_rc
MFFSCE 111111 ..... 00001 ----- 1001000111 - @X_t
MFFSCRN 111111 ..... 10110 ..... 1001000111 - @X_tb
MFFSCDRN 111111 ..... 10100 ..... 1001000111 - @X_tb
MFFSCRNI 111111 ..... 10111 ---.. 1001000111 - @X_imm2
MFFSCDRNI 111111 ..... 10101 --... 1001000111 - @X_imm3
MFFSL 111111 ..... 11000 ----- 1001000111 - @X_t
### Decimal Floating-Point Arithmetic Instructions

41
target/ppc/translate/fp-impl.c.inc
View File

@ -696,6 +696,27 @@ static bool trans_MFFSCRN(DisasContext *ctx, arg_X_tb *a)
return true;
}
static bool trans_MFFSCDRN(DisasContext *ctx, arg_X_tb *a)
{
TCGv_i64 t1, fpscr;
REQUIRE_INSNS_FLAGS2(ctx, ISA300);
REQUIRE_FPU(ctx);
t1 = tcg_temp_new_i64();
get_fpr(t1, a->rb);
tcg_gen_andi_i64(t1, t1, FP_DRN);
gen_reset_fpstatus();
fpscr = place_from_fpscr(a->rt, FP_DRN | FP_ENABLES | FP_NI | FP_RN);
store_fpscr_masked(fpscr, FP_DRN, t1, 0x0100);
tcg_temp_free_i64(t1);
tcg_temp_free_i64(fpscr);
return true;
}
static bool trans_MFFSCRNI(DisasContext *ctx, arg_X_imm2 *a)
{
TCGv_i64 t1, fpscr;
@ -716,6 +737,26 @@ static bool trans_MFFSCRNI(DisasContext *ctx, arg_X_imm2 *a)
return true;
}
static bool trans_MFFSCDRNI(DisasContext *ctx, arg_X_imm3 *a)
{
TCGv_i64 t1, fpscr;
REQUIRE_INSNS_FLAGS2(ctx, ISA300);
REQUIRE_FPU(ctx);
t1 = tcg_temp_new_i64();
tcg_gen_movi_i64(t1, (uint64_t)a->imm << FPSCR_DRN0);
gen_reset_fpstatus();
fpscr = place_from_fpscr(a->rt, FP_DRN | FP_ENABLES | FP_NI | FP_RN);
store_fpscr_masked(fpscr, FP_DRN, t1, 0x0100);
tcg_temp_free_i64(t1);
tcg_temp_free_i64(fpscr);
return true;
}
static bool trans_MFFSL(DisasContext *ctx, arg_X_t *a)
{
TCGv_i64 fpscr;