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target-microblaze: dec_barrel: Add BSEFI

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Add support for BSEFI.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@xilinx.com>
This commit is contained in:
Edgar E. Iglesias 2016-08-10 11:57:59 +02:00
parent 5c8f44b7db
commit faa48d742c
1 changed files with 32 additions and 14 deletions
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46
target/microblaze/translate.c
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@ -660,7 +660,8 @@ static void dec_div(DisasContext *dc)
static void dec_barrel(DisasContext *dc)
{
TCGv t0;
bool s, t;
unsigned int imm_w, imm_s;
bool s, t, e = false;
if ((dc->tb_flags & MSR_EE_FLAG)
&& (dc->cpu->env.pvr.regs[2] & PVR2_ILL_OPCODE_EXC_MASK)
@ -670,27 +671,44 @@ static void dec_barrel(DisasContext *dc)
return;
}
if (dc->type_b) {
/* Insert and extract are only available in immediate mode. */
e = extract32(dc->imm, 14, 1);
}
s = extract32(dc->imm, 10, 1);
t = extract32(dc->imm, 9, 1);
imm_w = extract32(dc->imm, 6, 5);
imm_s = extract32(dc->imm, 0, 5);
LOG_DIS("bs%s%s r%d r%d r%d\n",
LOG_DIS("bs%s%s%s r%d r%d r%d\n",
e ? "e" : "",
s ? "l" : "r", t ? "a" : "l", dc->rd, dc->ra, dc->rb);
t0 = tcg_temp_new();
tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
tcg_gen_andi_tl(t0, t0, 31);
if (s) {
tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
} else {
if (t) {
tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
if (e) {
if (imm_w + imm_s > 32 || imm_w == 0) {
/* These inputs have an undefined behavior. */
qemu_log_mask(LOG_GUEST_ERROR, "bsefi: Bad input w=%d s=%d\n",
imm_w, imm_s);
} else {
tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
tcg_gen_extract_i32(cpu_R[dc->rd], cpu_R[dc->ra], imm_s, imm_w);
}
} else {
t0 = tcg_temp_new();
tcg_gen_mov_tl(t0, *(dec_alu_op_b(dc)));
tcg_gen_andi_tl(t0, t0, 31);
if (s) {
tcg_gen_shl_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
} else {
if (t) {
tcg_gen_sar_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
} else {
tcg_gen_shr_tl(cpu_R[dc->rd], cpu_R[dc->ra], t0);
}
}
tcg_temp_free(t0);
}
tcg_temp_free(t0);
}
static void dec_bit(DisasContext *dc)