target/mips: Add availability control for DSP R3 ASE

Add infrastructure for availability control for DSP R3 ASE MIPS
instructions. Only BPOSGE32C currently belongs to DSP R3 ASE, but
this is likely to be changed in near future.

Reviewed-by: Aleksandar Markovic <amarkovic@wavecomp.com>
Reviewed-by: Philippe Mathieu-Daudé <f4bug@amsat.org>
Signed-off-by: Stefan Markovic <smarkovic@wavecomp.com>
Signed-off-by: Aleksandar Markovic <amarkovic@wavecomp.com>
This commit is contained in:
Stefan Markovic 2018-10-03 14:25:32 +02:00 committed by Aleksandar Markovic
parent 6208f09441
commit 59e781fbf1
3 changed files with 22 additions and 5 deletions

View File

@ -307,8 +307,8 @@ static inline void compute_hflags(CPUMIPSState *env)
env->hflags &= ~(MIPS_HFLAG_COP1X | MIPS_HFLAG_64 | MIPS_HFLAG_CP0 |
MIPS_HFLAG_F64 | MIPS_HFLAG_FPU | MIPS_HFLAG_KSU |
MIPS_HFLAG_AWRAP | MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2 |
MIPS_HFLAG_SBRI | MIPS_HFLAG_MSA | MIPS_HFLAG_FRE |
MIPS_HFLAG_ELPA | MIPS_HFLAG_ERL);
MIPS_HFLAG_DSPR3 | MIPS_HFLAG_SBRI | MIPS_HFLAG_MSA |
MIPS_HFLAG_FRE | MIPS_HFLAG_ELPA | MIPS_HFLAG_ERL);
if (env->CP0_Status & (1 << CP0St_ERL)) {
env->hflags |= MIPS_HFLAG_ERL;
}
@ -355,7 +355,12 @@ static inline void compute_hflags(CPUMIPSState *env)
(env->CP0_Config5 & (1 << CP0C5_SBRI))) {
env->hflags |= MIPS_HFLAG_SBRI;
}
if (env->insn_flags & ASE_DSPR2) {
if (env->insn_flags & ASE_DSPR3) {
if (env->CP0_Status & (1 << CP0St_MX)) {
env->hflags |= MIPS_HFLAG_DSP | MIPS_HFLAG_DSPR2 |
MIPS_HFLAG_DSPR3;
}
} else if (env->insn_flags & ASE_DSPR2) {
/* Enables access MIPS DSP resources, now our cpu is DSP ASER2,
so enable to access DSPR2 resources. */
if (env->CP0_Status & (1 << CP0St_MX)) {

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@ -2407,6 +2407,17 @@ static inline void check_dspr2(DisasContext *ctx)
}
}
static inline void check_dspr3(DisasContext *ctx)
{
if (unlikely(!(ctx->hflags & MIPS_HFLAG_DSPR3))) {
if (ctx->insn_flags & ASE_DSP) {
generate_exception_end(ctx, EXCP_DSPDIS);
} else {
generate_exception_end(ctx, EXCP_RI);
}
}
}
/* This code generates a "reserved instruction" exception if the
CPU does not support the instruction set corresponding to flags. */
static inline void check_insn(DisasContext *ctx, uint64_t flags)
@ -20637,7 +20648,7 @@ static int decode_nanomips_32_48_opc(CPUMIPSState *env, DisasContext *ctx)
gen_compute_branch_cp1_nm(ctx, OPC_BC1NEZ, rt, s);
break;
case NM_BPOSGE32C:
check_dspr2(ctx);
check_dspr3(ctx);
{
int32_t imm = extract32(ctx->opcode, 1, 13) |
extract32(ctx->opcode, 0, 1) << 13;

View File

@ -485,7 +485,8 @@ const mips_def_t mips_defs[] =
.CP1_fcr31 = (1 << FCR31_ABS2008) | (1 << FCR31_NAN2008),
.SEGBITS = 32,
.PABITS = 32,
.insn_flags = CPU_NANOMIPS32 | ASE_DSP | ASE_DSPR2 | ASE_MT,
.insn_flags = CPU_NANOMIPS32 | ASE_DSP | ASE_DSPR2 | ASE_DSPR3 |
ASE_MT,
.mmu_type = MMU_TYPE_R4000,
},
#if defined(TARGET_MIPS64)