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target-ppc: Use clz and ctz opcodes 

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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4
target/ppc/helper.h
View File

@ -38,16 +38,12 @@ DEF_HELPER_4(divde, i64, env, i64, i64, i32)
DEF_HELPER_4(divweu, tl, env, tl, tl, i32)
DEF_HELPER_4(divwe, tl, env, tl, tl, i32)
DEF_HELPER_FLAGS_1(cntlzw, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(cnttzw, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(popcntb, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(popcntw, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_2(cmpb, TCG_CALL_NO_RWG_SE, tl, tl, tl)
DEF_HELPER_3(sraw, tl, env, tl, tl)
#if defined(TARGET_PPC64)
DEF_HELPER_FLAGS_2(cmpeqb, TCG_CALL_NO_RWG_SE, i32, tl, tl)
DEF_HELPER_FLAGS_1(cntlzd, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(cnttzd, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_1(popcntd, TCG_CALL_NO_RWG_SE, tl, tl)
DEF_HELPER_FLAGS_2(bpermd, TCG_CALL_NO_RWG_SE, i64, i64, i64)
DEF_HELPER_3(srad, tl, env, tl, tl)

20
target/ppc/int_helper.c
View File

@ -141,16 +141,6 @@ uint64_t helper_divde(CPUPPCState *env, uint64_t rau, uint64_t rbu, uint32_t oe)
#endif
target_ulong helper_cntlzw(target_ulong t)
{
return clz32(t);
}
target_ulong helper_cnttzw(target_ulong t)
{
return ctz32(t);
}
#if defined(TARGET_PPC64)
/* if x = 0xab, returns 0xababababababababa */
#define pattern(x) (((x) & 0xff) * (~(target_ulong)0 / 0xff))
@ -174,16 +164,6 @@ uint32_t helper_cmpeqb(target_ulong ra, target_ulong rb)
#undef haszero
#undef hasvalue
target_ulong helper_cntlzd(target_ulong t)
{
return clz64(t);
}
target_ulong helper_cnttzd(target_ulong t)
{
return ctz64(t);
}
/* Return invalid random number.
*
* FIXME: Add rng backend or other mechanism to get cryptographically suitable

20
target/ppc/translate.c
View File

@ -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)]);
}