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target/mips: Convert MSA LDI opcode to decodetree

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Convert the LDI opcode (Immediate Load) to decodetree. Since it
overlaps with the generic MSA handler, use a decodetree overlap
group.

Since the 'data format' field is a constant value, use
tcg_constant_i32() instead of a TCG temporary.

Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
Signed-off-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Message-Id: <20211028210843.2120802-9-f4bug@amsat.org>
This commit is contained in:
Philippe Mathieu-Daudé 2021-10-19 08:22:31 +02:00
parent d61566cf78
commit 75094c334e
2 changed files with 21 additions and 9 deletions
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8
target/mips/tcg/msa.decode
View File

@ -14,10 +14,12 @@
&r rs rt rd sa
&msa_bz df wt sa
&msa_ldi df wd sa
@lsa ...... rs:5 rt:5 rd:5 ... sa:2 ...... &r
@bz_v ...... ... .. wt:5 sa:16 &msa_bz df=3
@bz ...... ... df:2 wt:5 sa:16 &msa_bz
@ldi ...... ... df:2 sa:s10 wd:5 ...... &msa_ldi
LSA 000000 ..... ..... ..... 000 .. 000101 @lsa
DLSA 000000 ..... ..... ..... 000 .. 010101 @lsa
@ -27,4 +29,8 @@ BNZ_V 010001 01111 ..... ................ @bz_v
BZ 010001 110 .. ..... ................ @bz
BNZ 010001 111 .. ..... ................ @bz
MSA 011110 --------------------------
{
LDI 011110 110 .. .......... ..... 000111 @ldi
MSA 011110 --------------------------
}

22
target/mips/tcg/msa_translate.c
View File

@ -70,7 +70,6 @@ enum {
OPC_CLEI_S_df = (0x4 << 23) | OPC_MSA_I5_07,
OPC_MINI_U_df = (0x5 << 23) | OPC_MSA_I5_06,
OPC_CLEI_U_df = (0x5 << 23) | OPC_MSA_I5_07,
OPC_LDI_df = (0x6 << 23) | OPC_MSA_I5_07,
/* I8 instruction */
OPC_ANDI_B = (0x0 << 24) | OPC_MSA_I8_00,
@ -515,13 +514,6 @@ static void gen_msa_i5(DisasContext *ctx)
case OPC_CLEI_U_df:
gen_helper_msa_clei_u_df(cpu_env, tdf, twd, tws, timm);
break;
case OPC_LDI_df:
{
int32_t s10 = sextract32(ctx->opcode, 11, 10);
tcg_gen_movi_i32(timm, s10);
gen_helper_msa_ldi_df(cpu_env, tdf, twd, timm);
}
break;
default:
MIPS_INVAL("MSA instruction");
gen_reserved_instruction(ctx);
@ -534,6 +526,20 @@ static void gen_msa_i5(DisasContext *ctx)
tcg_temp_free_i32(timm);
}
static bool trans_LDI(DisasContext *ctx, arg_msa_ldi *a)
{
if (!check_msa_enabled(ctx)) {
return true;
}
gen_helper_msa_ldi_df(cpu_env,
tcg_constant_i32(a->df),
tcg_constant_i32(a->wd),
tcg_constant_i32(a->sa));
return true;
}
static void gen_msa_bit(DisasContext *ctx)
{
#define MASK_MSA_BIT(op) (MASK_MSA_MINOR(op) | (op & (0x7 << 23)))