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target-tricore: Add instructions of BRR opcode format 

Add instructions of BRR opcode format.
Add MASK_OP_BRR_DISP15_SEXT.

Signed-off-by: Bastian Koppelmann <kbastian@mail.uni-paderborn.de>
Reviewed-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Bastian Koppelmann 2014-10-23 12:18:02 +01:00
parent 83c1bb1868
commit a68e0d547f
2 changed files with 89 additions and 2 deletions
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90
target-tricore/translate.c
View File

@ -567,7 +567,7 @@ static void gen_loop(DisasContext *ctx, int r1, int32_t offset)
static void gen_compute_branch(DisasContext *ctx, uint32_t opc, int r1,
int r2 , int32_t constant , int32_t offset)
{
TCGv temp;
TCGv temp, temp2;
int n;
switch (opc) {
@ -721,6 +721,79 @@ static void gen_compute_branch(DisasContext *ctx, uint32_t opc, int r1,
}
tcg_temp_free(temp);
break;
/* BRR Format */
case OPCM_32_BRR_EQ_NEQ:
if (MASK_OP_BRR_OP2(ctx->opcode) == OPC2_32_BRR_JEQ) {
gen_branch_cond(ctx, TCG_COND_EQ, cpu_gpr_d[r1], cpu_gpr_d[r2],
offset);
} else {
gen_branch_cond(ctx, TCG_COND_NE, cpu_gpr_d[r1], cpu_gpr_d[r2],
offset);
}
break;
case OPCM_32_BRR_ADDR_EQ_NEQ:
if (MASK_OP_BRR_OP2(ctx->opcode) == OPC2_32_BRR_JEQ_A) {
gen_branch_cond(ctx, TCG_COND_EQ, cpu_gpr_a[r1], cpu_gpr_a[r2],
offset);
} else {
gen_branch_cond(ctx, TCG_COND_NE, cpu_gpr_a[r1], cpu_gpr_a[r2],
offset);
}
break;
case OPCM_32_BRR_GE:
if (MASK_OP_BRR_OP2(ctx->opcode) == OPC2_32_BRR_JGE) {
gen_branch_cond(ctx, TCG_COND_GE, cpu_gpr_d[r1], cpu_gpr_d[r2],
offset);
} else {
gen_branch_cond(ctx, TCG_COND_GEU, cpu_gpr_d[r1], cpu_gpr_d[r2],
offset);
}
break;
case OPCM_32_BRR_JLT:
if (MASK_OP_BRR_OP2(ctx->opcode) == OPC2_32_BRR_JLT) {
gen_branch_cond(ctx, TCG_COND_LT, cpu_gpr_d[r1], cpu_gpr_d[r2],
offset);
} else {
gen_branch_cond(ctx, TCG_COND_LTU, cpu_gpr_d[r1], cpu_gpr_d[r2],
offset);
}
break;
case OPCM_32_BRR_LOOP:
if (MASK_OP_BRR_OP2(ctx->opcode) == OPC2_32_BRR_LOOP) {
gen_loop(ctx, r1, offset * 2);
} else {
/* OPC2_32_BRR_LOOPU */
gen_goto_tb(ctx, 0, ctx->pc + offset * 2);
}
break;
case OPCM_32_BRR_JNE:
temp = tcg_temp_new();
temp2 = tcg_temp_new();
if (MASK_OP_BRC_OP2(ctx->opcode) == OPC2_32_BRR_JNED) {
tcg_gen_mov_tl(temp, cpu_gpr_d[r1]);
/* also save r2, in case of r1 == r2, so r2 is not decremented */
tcg_gen_mov_tl(temp2, cpu_gpr_d[r2]);
/* subi is unconditional */
tcg_gen_subi_tl(cpu_gpr_d[r1], cpu_gpr_d[r1], 1);
gen_branch_cond(ctx, TCG_COND_NE, temp, temp2, offset);
} else {
tcg_gen_mov_tl(temp, cpu_gpr_d[r1]);
/* also save r2, in case of r1 == r2, so r2 is not decremented */
tcg_gen_mov_tl(temp2, cpu_gpr_d[r2]);
/* addi is unconditional */
tcg_gen_addi_tl(cpu_gpr_d[r1], cpu_gpr_d[r1], 1);
gen_branch_cond(ctx, TCG_COND_NE, temp, temp2, offset);
}
tcg_temp_free(temp);
tcg_temp_free(temp2);
break;
case OPCM_32_BRR_JNZ:
if (MASK_OP_BRR_OP2(ctx->opcode) == OPC2_32_BRR_JNZ_A) {
gen_branch_condi(ctx, TCG_COND_NE, cpu_gpr_a[r1], 0, offset);
} else {
gen_branch_condi(ctx, TCG_COND_EQ, cpu_gpr_a[r1], 0, offset);
}
break;
default:
printf("Branch Error at %x\n", ctx->pc);
}
@ -2378,7 +2451,7 @@ static void decode_bol_opc(CPUTriCoreState *env, DisasContext *ctx, int32_t op1)
static void decode_32Bit_opc(CPUTriCoreState *env, DisasContext *ctx)
{
int op1;
int32_t r1;
int32_t r1, r2;
int32_t address;
int8_t b, const4;
int32_t bpos;
@ -2530,6 +2603,19 @@ static void decode_32Bit_opc(CPUTriCoreState *env, DisasContext *ctx)
r1 = MASK_OP_BRN_S1(ctx->opcode);
gen_compute_branch(ctx, op1, r1, 0, 0, address);
break;
/* BRR Format */
case OPCM_32_BRR_EQ_NEQ:
case OPCM_32_BRR_ADDR_EQ_NEQ:
case OPCM_32_BRR_GE:
case OPCM_32_BRR_JLT:
case OPCM_32_BRR_JNE:
case OPCM_32_BRR_JNZ:
case OPCM_32_BRR_LOOP:
address = MASK_OP_BRR_DISP15_SEXT(ctx->opcode);
r2 = MASK_OP_BRR_S2(ctx->opcode);
r1 = MASK_OP_BRR_S1(ctx->opcode);
gen_compute_branch(ctx, op1, r1, r2, 0, address);
break;
}
}

1
target-tricore/tricore-opcodes.h
View File

@ -139,6 +139,7 @@
/* BRR Format */
#define MASK_OP_BRR_OP2(op) MASK_BITS_SHIFT(op, 31, 31)
#define MASK_OP_BRR_DISP15(op) MASK_BITS_SHIFT(op, 16, 30)
#define MASK_OP_BRR_DISP15_SEXT(op) MASK_BITS_SHIFT_SEXT(op, 16, 30)
#define MASK_OP_BRR_S2(op) MASK_BITS_SHIFT(op, 12, 15)
#define MASK_OP_BRR_S1(op) MASK_BITS_SHIFT(op, 8, 11)