Optimize mulldo by using the muls2_i64 operation rather than a helper. Eliminate
the obsolete helper code.
Signed-off-by: Tom Musta <tommusta@gmail.com>
Suggested-by: Richard Henderson <rth@twiddle.net>
Reviewed-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Alexander Graf <agraf@suse.de>
DEF_HELPER_5(lscbx, tl, env, tl, i32, i32, i32)
#if defined(TARGET_PPC64)
-DEF_HELPER_3(mulldo, i64, env, i64, i64)
DEF_HELPER_4(divdeu, i64, env, i64, i64, i32)
DEF_HELPER_4(divde, i64, env, i64, i64, i32)
#endif
#include "helper_regs.h"
/*****************************************************************************/
/* Fixed point operations helpers */
-#if defined(TARGET_PPC64)
-
-uint64_t helper_mulldo(CPUPPCState *env, uint64_t arg1, uint64_t arg2)
-{
- int64_t th;
- uint64_t tl;
-
- muls64(&tl, (uint64_t *)&th, arg1, arg2);
-
- /* th should either contain all 1 bits or all 0 bits and should
- * match the sign bit of tl; otherwise we have overflowed. */
-
- if ((int64_t)tl < 0) {
- if (likely(th == -1LL)) {
- env->ov = 0;
- } else {
- env->so = env->ov = 1;
- }
- } else if (likely(th == 0LL)) {
- env->ov = 0;
- } else {
- env->so = env->ov = 1;
- }
-
- return (int64_t)tl;
-}
-#endif
target_ulong helper_divweu(CPUPPCState *env, target_ulong ra, target_ulong rb,
uint32_t oe)
/* mulldo mulldo. */
static void gen_mulldo(DisasContext *ctx)
{
- gen_helper_mulldo(cpu_gpr[rD(ctx->opcode)], cpu_env,
- cpu_gpr[rA(ctx->opcode)], cpu_gpr[rB(ctx->opcode)]);
+ TCGv_i64 t0 = tcg_temp_new_i64();
+ TCGv_i64 t1 = tcg_temp_new_i64();
+
+ tcg_gen_muls2_i64(t0, t1, cpu_gpr[rA(ctx->opcode)],
+ cpu_gpr[rB(ctx->opcode)]);
+ tcg_gen_mov_i64(cpu_gpr[rD(ctx->opcode)], t0);
+
+ tcg_gen_sari_i64(t0, t0, 63);
+ tcg_gen_setcond_i64(TCG_COND_NE, cpu_ov, t0, t1);
+ tcg_gen_or_tl(cpu_so, cpu_so, cpu_ov);
+
+ tcg_temp_free_i64(t0);
+ tcg_temp_free_i64(t1);
+
if (unlikely(Rc(ctx->opcode) != 0)) {
gen_set_Rc0(ctx, cpu_gpr[rD(ctx->opcode)]);
}