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sparc64: fix umul and smul insns 

- truncate and sign or zero extend operands before multiplication
- factor out common code to gen_op_multiply() with parameter to sign/zero extend
- call gen_op_multiply from gen_op_umul and gen_op_smul

Signed-off-by: Igor V. Kovalenko <igor.v.kovalenko@gmail.com>
Signed-off-by: Blue Swirl <blauwirbel@gmail.com>
This commit is contained in:
Igor V. Kovalenko 2010-06-02 00:12:58 +04:00 committed by Blue Swirl
parent 09487205bb
commit fb170183e7
1 changed files with 29 additions and 26 deletions
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55
target-sparc/translate.c
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@ -662,50 +662,53 @@ static inline void gen_op_mulscc(TCGv dst, TCGv src1, TCGv src2)
tcg_gen_mov_tl(dst, cpu_cc_dst);
}
static inline void gen_op_umul(TCGv dst, TCGv src1, TCGv src2)
static inline void gen_op_multiply(TCGv dst, TCGv src1, TCGv src2, int sign_ext)
{
TCGv_i32 r_src1, r_src2;
TCGv_i64 r_temp, r_temp2;
r_src1 = tcg_temp_new_i32();
r_src2 = tcg_temp_new_i32();
tcg_gen_trunc_tl_i32(r_src1, src1);
tcg_gen_trunc_tl_i32(r_src2, src2);
r_temp = tcg_temp_new_i64();
r_temp2 = tcg_temp_new_i64();
tcg_gen_extu_tl_i64(r_temp, src2);
tcg_gen_extu_tl_i64(r_temp2, src1);
if (sign_ext) {
tcg_gen_ext_i32_i64(r_temp, r_src2);
tcg_gen_ext_i32_i64(r_temp2, r_src1);
} else {
tcg_gen_extu_i32_i64(r_temp, r_src2);
tcg_gen_extu_i32_i64(r_temp2, r_src1);
}
tcg_gen_mul_i64(r_temp2, r_temp, r_temp2);
tcg_gen_shri_i64(r_temp, r_temp2, 32);
tcg_gen_trunc_i64_tl(cpu_tmp0, r_temp);
tcg_temp_free_i64(r_temp);
tcg_gen_andi_tl(cpu_y, cpu_tmp0, 0xffffffff);
#ifdef TARGET_SPARC64
tcg_gen_mov_i64(dst, r_temp2);
#else
tcg_gen_trunc_i64_tl(dst, r_temp2);
#endif
tcg_temp_free_i64(r_temp2);
tcg_temp_free_i32(r_src1);
tcg_temp_free_i32(r_src2);
}
static inline void gen_op_umul(TCGv dst, TCGv src1, TCGv src2)
{
/* zero-extend truncated operands before multiplication */
gen_op_multiply(dst, src1, src2, 0);
}
static inline void gen_op_smul(TCGv dst, TCGv src1, TCGv src2)
{
TCGv_i64 r_temp, r_temp2;
r_temp = tcg_temp_new_i64();
r_temp2 = tcg_temp_new_i64();
tcg_gen_ext_tl_i64(r_temp, src2);
tcg_gen_ext_tl_i64(r_temp2, src1);
tcg_gen_mul_i64(r_temp2, r_temp, r_temp2);
tcg_gen_shri_i64(r_temp, r_temp2, 32);
tcg_gen_trunc_i64_tl(cpu_tmp0, r_temp);
tcg_temp_free_i64(r_temp);
tcg_gen_andi_tl(cpu_y, cpu_tmp0, 0xffffffff);
#ifdef TARGET_SPARC64
tcg_gen_mov_i64(dst, r_temp2);
#else
tcg_gen_trunc_i64_tl(dst, r_temp2);
#endif
tcg_temp_free_i64(r_temp2);
/* sign-extend truncated operands before multiplication */
gen_op_multiply(dst, src1, src2, 1);
}
#ifdef TARGET_SPARC64