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[Qemu-devel] [PATCH v8 04/14] target-mips-ase-dsp: Add branch instructio
From: |
Jia Liu |
Subject: |
[Qemu-devel] [PATCH v8 04/14] target-mips-ase-dsp: Add branch instructions |
Date: |
Wed, 12 Sep 2012 10:01:45 +0800 |
Add MIPS ASE DSP Branch instructions.
Signed-off-by: Jia Liu <address@hidden>
---
target-mips/translate.c | 44 ++++++++++++++++++++++++++++++++++++++++----
1 file changed, 40 insertions(+), 4 deletions(-)
diff --git a/target-mips/translate.c b/target-mips/translate.c
index a983220..dcc0905 100644
--- a/target-mips/translate.c
+++ b/target-mips/translate.c
@@ -332,6 +332,14 @@ enum {
OPC_DSHD = (0x05 << 6) | OPC_DBSHFL,
};
+/* MIPS DSP REGIMM opcodes */
+enum {
+ OPC_BPOSGE32 = (0x1C << 16) | OPC_REGIMM,
+#if defined(TARGET_MIPS64)
+ OPC_BPOSGE64 = (0x1D << 16) | OPC_REGIMM,
+#endif
+};
+
/* Coprocessor 0 (rs field) */
#define MASK_CP0(op) MASK_OP_MAJOR(op) | (op & (0x1F << 21))
@@ -2833,6 +2841,16 @@ static void gen_compute_branch (DisasContext *ctx,
uint32_t opc,
}
btgt = ctx->pc + insn_bytes + offset;
break;
+ case OPC_BPOSGE32:
+#if defined(TARGET_MIPS64)
+ case OPC_BPOSGE64:
+ tcg_gen_andi_tl(t0, cpu_dspctrl, 0x7F);
+#else
+ tcg_gen_andi_tl(t0, cpu_dspctrl, 0x3F);
+#endif
+ bcond_compute = 1;
+ btgt = ctx->pc + insn_bytes + offset;
+ break;
case OPC_J:
case OPC_JAL:
case OPC_JALX:
@@ -3021,6 +3039,16 @@ static void gen_compute_branch (DisasContext *ctx,
uint32_t opc,
tcg_gen_setcondi_tl(TCG_COND_LT, bcond, t0, 0);
MIPS_DEBUG("bltzl %s, " TARGET_FMT_lx, regnames[rs], btgt);
goto likely;
+ case OPC_BPOSGE32:
+ tcg_gen_setcondi_tl(TCG_COND_GE, bcond, t0, 32);
+ MIPS_DEBUG("bposge32 %s, " TARGET_FMT_lx, t0, btgt);
+ goto not_likely;
+#if defined(TARGET_MIPS64)
+ case OPC_BPOSGE64:
+ tcg_gen_setcondi_tl(TCG_COND_GE, bcond, t0, 64);
+ MIPS_DEBUG("bposge64 %s, " TARGET_FMT_lx, t0, btgt);
+ goto not_likely;
+#endif
case OPC_BLTZALS:
case OPC_BLTZAL:
ctx->hflags |= (opc == OPC_BLTZALS
@@ -11276,10 +11304,6 @@ static void decode_micromips32_opc (CPUMIPSState *env,
DisasContext *ctx,
(ctx->opcode >> 18) & 0x7, imm << 1);
*is_branch = 1;
break;
- case BPOSGE64:
- case BPOSGE32:
- /* MIPS DSP: not implemented */
- /* Fall through */
default:
MIPS_INVAL("pool32i");
generate_exception(ctx, EXCP_RI);
@@ -11468,6 +11492,10 @@ static void decode_micromips32_opc (CPUMIPSState *env,
DisasContext *ctx,
do_st:
gen_st(ctx, mips32_op, rt, rs, imm);
break;
+ case BPOSGE64:
+ case BPOSGE32:
+ /* MIPS DSP: not implemented */
+ /* Fall through */
default:
generate_exception(ctx, EXCP_RI);
break;
@@ -12188,6 +12216,14 @@ static void decode_opc (CPUMIPSState *env,
DisasContext *ctx, int *is_branch)
check_insn(env, ctx, ISA_MIPS32R2);
/* Treat as NOP. */
break;
+ case OPC_BPOSGE32: /* MIPS DSP branch */
+#if defined(TARGET_MIPS64)
+ case OPC_BPOSGE64:
+#endif
+ check_dsp(ctx);
+ gen_compute_branch(ctx, op1, 4, -1, -2, (int32_t)imm << 2);
+ *is_branch = 1;
+ break;
default: /* Invalid */
MIPS_INVAL("regimm");
generate_exception(ctx, EXCP_RI);
--
1.7.9.5
- [Qemu-devel] [PATCH v8 00/14] QEMU MIPS ASE DSP sup port, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 01/14] target-mips-ase-dsp: Add internal functions, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 02/14] target-mips-ase-dsp: Add internal dsp resources access check, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 03/14] target-mips-ase-dsp: Use correct acc value to index cpu_HI/cpu_LO rather than using a fix number, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 04/14] target-mips-ase-dsp: Add branch instructions,
Jia Liu <=
- [Qemu-devel] [PATCH v8 05/14] target-mips-ase-dsp: Add load instructions, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 07/14] target-mips-ase-dsp: Add GPR-based shift instructions, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 08/14] target-mips-ase-dsp: Add multiply instructions, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 09/14] target-mips-ase-dsp: Add bit/manipulation instructions, Jia Liu, 2012/09/11
- [Qemu-devel] [PATCH v8 10/14] target-mips-ase-dsp: Add compare-pick instructions, Jia Liu, 2012/09/11