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target-ppc: Use clz and ctz opcodes

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Signed-off-by: Richard Henderson <rth@twiddle.net>
This commit is contained in:
Richard Henderson 2016-11-16 11:27:03 +01:00
parent 555baef8d0
commit 9b8514e56e
3 changed files with 16 additions and 28 deletions
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20
target/ppc/translate.c
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@ -1641,7 +1641,13 @@ static void gen_andis_(DisasContext *ctx)
/* cntlzw */
static void gen_cntlzw(DisasContext *ctx)
{
gen_helper_cntlzw(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
TCGv_i32 t = tcg_temp_new_i32();
tcg_gen_trunc_tl_i32(t, cpu_gpr[rS(ctx->opcode)]);
tcg_gen_clzi_i32(t, t, 32);
tcg_gen_extu_i32_tl(cpu_gpr[rA(ctx->opcode)], t);
tcg_temp_free_i32(t);
if (unlikely(Rc(ctx->opcode) != 0))
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
}
@ -1649,7 +1655,13 @@ static void gen_cntlzw(DisasContext *ctx)
/* cnttzw */
static void gen_cnttzw(DisasContext *ctx)
{
gen_helper_cnttzw(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
TCGv_i32 t = tcg_temp_new_i32();
tcg_gen_trunc_tl_i32(t, cpu_gpr[rS(ctx->opcode)]);
tcg_gen_ctzi_i32(t, t, 32);
tcg_gen_extu_i32_tl(cpu_gpr[rA(ctx->opcode)], t);
tcg_temp_free_i32(t);
if (unlikely(Rc(ctx->opcode) != 0)) {
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
}
@ -1891,7 +1903,7 @@ GEN_LOGICAL1(extsw, tcg_gen_ext32s_tl, 0x1E, PPC_64B);
/* cntlzd */
static void gen_cntlzd(DisasContext *ctx)
{
gen_helper_cntlzd(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
tcg_gen_clzi_i64(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)], 64);
if (unlikely(Rc(ctx->opcode) != 0))
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
}
@ -1899,7 +1911,7 @@ static void gen_cntlzd(DisasContext *ctx)
/* cnttzd */
static void gen_cnttzd(DisasContext *ctx)
{
gen_helper_cnttzd(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)]);
tcg_gen_ctzi_i64(cpu_gpr[rA(ctx->opcode)], cpu_gpr[rS(ctx->opcode)], 64);
if (unlikely(Rc(ctx->opcode) != 0)) {
gen_set_Rc0(ctx, cpu_gpr[rA(ctx->opcode)]);
}