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target/mips: Support R5900 MFLO1, MTLO1, MFHI1 and MTHI1 instructions

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Backports commit 8d927f7cb4b3ec06d6a7cf71221fd6a48e9a8fb5 from qemu
This commit is contained in:
Fredrik Noring 2018-11-10 12:06:17 -05:00 committed by Lioncash
parent 3914d65fb9
commit b42c8e80b8
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GPG key ID: 4E3C3CC1031BA9C7
1 changed files with 17 additions and 6 deletions
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23
qemu/target/mips/translate.c
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@ -4281,17 +4281,21 @@ static void gen_HILO(DisasContext *ctx, uint32_t opc, int acc, int reg)
TCGv *cpu_HI = tcg_ctx->cpu_HI;
TCGv *cpu_LO = tcg_ctx->cpu_LO;
if (reg == 0 && (opc == OPC_MFHI || opc == OPC_MFLO)) {
if (reg == 0 && (opc == OPC_MFHI || opc == TX79_MMI_MFHI1 ||
opc == OPC_MFLO || opc == TX79_MMI_MFLO1)) {
/* Treat as NOP. */
return;
}
if (acc != 0) {
check_dsp(ctx);
if (!(ctx->insn_flags & INSN_R5900)) {
check_dsp(ctx);
}
}
switch (opc) {
case OPC_MFHI:
case TX79_MMI_MFHI1:
#if defined(TARGET_MIPS64)
if (acc != 0) {
tcg_gen_ext32s_tl(tcg_ctx, cpu_gpr[reg], cpu_HI[acc]);
@ -4302,6 +4306,7 @@ static void gen_HILO(DisasContext *ctx, uint32_t opc, int acc, int reg)
}
break;
case OPC_MFLO:
case TX79_MMI_MFLO1:
#if defined(TARGET_MIPS64)
if (acc != 0) {
tcg_gen_ext32s_tl(tcg_ctx, cpu_gpr[reg], cpu_LO[acc]);
@ -4312,6 +4317,7 @@ static void gen_HILO(DisasContext *ctx, uint32_t opc, int acc, int reg)
}
break;
case OPC_MTHI:
case TX79_MMI_MTHI1:
if (reg != 0) {
#if defined(TARGET_MIPS64)
if (acc != 0) {
@ -4326,6 +4332,7 @@ static void gen_HILO(DisasContext *ctx, uint32_t opc, int acc, int reg)
}
break;
case OPC_MTLO:
case TX79_MMI_MTLO1:
if (reg != 0) {
#if defined(TARGET_MIPS64)
if (acc != 0) {
@ -24809,13 +24816,17 @@ static void decode_tx79_mmi(CPUMIPSState *env, DisasContext *ctx)
case TX79_MMI_MULTU1:
gen_mul_txx9(ctx, opc, rd, rs, rt);
break;
case TX79_MMI_MTLO1:
case TX79_MMI_MTHI1:
gen_HILO(ctx, opc, 1, rs);
break;
case TX79_MMI_MFLO1:
case TX79_MMI_MFHI1:
gen_HILO(ctx, opc, 1, rd);
break;
case TX79_MMI_MADD: /* TODO: TX79_MMI_MADD */
case TX79_MMI_MADDU: /* TODO: TX79_MMI_MADDU */
case TX79_MMI_PLZCW: /* TODO: TX79_MMI_PLZCW */
case TX79_MMI_MFHI1: /* TODO: TX79_MMI_MFHI1 */
case TX79_MMI_MTHI1: /* TODO: TX79_MMI_MTHI1 */
case TX79_MMI_MFLO1: /* TODO: TX79_MMI_MFLO1 */
case TX79_MMI_MTLO1: /* TODO: TX79_MMI_MTLO1 */
case TX79_MMI_DIV1: /* TODO: TX79_MMI_DIV1 */
case TX79_MMI_DIVU1: /* TODO: TX79_MMI_DIVU1 */
case TX79_MMI_MADD1: /* TODO: TX79_MMI_MADD1 */