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target/mips: Add emulation of MMI instruction PCPYLD 

Add emulation of MMI instruction PCPYLD. The emulation is implemented
using TCG front end operations directly to achieve better performance.

Signed-off-by: Mateja Marjanovic <mateja.marjanovic@rt-rk.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Aleksandar Rikalo <arikalo@wavecomp.com>
Message-Id: <1551712405-2530-3-git-send-email-mateja.marjanovic@rt-rk.com>
This commit is contained in:
Mateja Marjanovic 2019-03-04 16:13:14 +01:00 committed by Aleksandar Markovic
parent d3434d9f78
commit b87eef31f2
1 changed files with 42 additions and 1 deletions
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43
target/mips/translate.c
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@ -24419,6 +24419,45 @@ static void gen_mmi_pcpyh(DisasContext *ctx)
}
}
/*
* PCPYLD rd, rs, rt
*
* Parallel Copy Lower Doubleword
*
* 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0 9 8 7 6 5 4 3 2 1 0
* +-----------+---------+---------+---------+---------+-----------+
* | MMI | rs | rt | rd | PCPYLD | MMI2 |
* +-----------+---------+---------+---------+---------+-----------+
*/
static void gen_mmi_pcpyld(DisasContext *ctx)
{
uint32_t rs, rt, rd;
uint32_t opcode;
opcode = ctx->opcode;
rs = extract32(opcode, 21, 5);
rt = extract32(opcode, 16, 5);
rd = extract32(opcode, 11, 5);
if (rd == 0) {
/* nop */
} else {
if (rs == 0) {
tcg_gen_movi_i64(cpu_mmr[rd], 0);
} else {
tcg_gen_mov_i64(cpu_mmr[rd], cpu_gpr[rs]);
}
if (rt == 0) {
tcg_gen_movi_i64(cpu_gpr[rd], 0);
} else {
if (rd != rt) {
tcg_gen_mov_i64(cpu_gpr[rd], cpu_gpr[rt]);
}
}
}
}
#endif
@ -27433,7 +27472,6 @@ static void decode_mmi2(CPUMIPSState *env, DisasContext *ctx)
case MMI_OPC_2_PINTH: /* TODO: MMI_OPC_2_PINTH */
case MMI_OPC_2_PMULTW: /* TODO: MMI_OPC_2_PMULTW */
case MMI_OPC_2_PDIVW: /* TODO: MMI_OPC_2_PDIVW */
case MMI_OPC_2_PCPYLD: /* TODO: MMI_OPC_2_PCPYLD */
case MMI_OPC_2_PMADDH: /* TODO: MMI_OPC_2_PMADDH */
case MMI_OPC_2_PHMADH: /* TODO: MMI_OPC_2_PHMADH */
case MMI_OPC_2_PAND: /* TODO: MMI_OPC_2_PAND */
@ -27448,6 +27486,9 @@ static void decode_mmi2(CPUMIPSState *env, DisasContext *ctx)
case MMI_OPC_2_PROT3W: /* TODO: MMI_OPC_2_PROT3W */
generate_exception_end(ctx, EXCP_RI); /* TODO: MMI_OPC_CLASS_MMI2 */
break;
case MMI_OPC_2_PCPYLD:
gen_mmi_pcpyld(ctx);
break;
default:
MIPS_INVAL("TX79 MMI class MMI2");
generate_exception_end(ctx, EXCP_RI);