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target/mips: Add availability control for DSP R3 ASE

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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
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11
target/mips/internal.h
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)) {

13
target/mips/translate.c
View File

@ -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;

3
target/mips/translate_init.inc.c
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)