diff options
Diffstat (limited to 'target-cris/translate.c')
-rw-r--r-- | target-cris/translate.c | 70 |
1 files changed, 1 insertions, 69 deletions
diff --git a/target-cris/translate.c b/target-cris/translate.c index b9aae8662f..735e4442a4 100644 --- a/target-cris/translate.c +++ b/target-cris/translate.c @@ -320,74 +320,6 @@ static void t_gen_mulu(TCGv d, TCGv d2, TCGv a, TCGv b) tcg_temp_free_i64(t1); } -/* 32bit branch-free binary search for counting leading zeros. */ -static void t_gen_lz_i32(TCGv d, TCGv x) -{ - TCGv_i32 y, m, n; - - y = tcg_temp_new_i32(); - m = tcg_temp_new_i32(); - n = tcg_temp_new_i32(); - - /* y = -(x >> 16) */ - tcg_gen_shri_i32(y, x, 16); - tcg_gen_neg_i32(y, y); - - /* m = (y >> 16) & 16 */ - tcg_gen_sari_i32(m, y, 16); - tcg_gen_andi_i32(m, m, 16); - - /* n = 16 - m */ - tcg_gen_sub_i32(n, tcg_const_i32(16), m); - /* x = x >> m */ - tcg_gen_shr_i32(x, x, m); - - /* y = x - 0x100 */ - tcg_gen_subi_i32(y, x, 0x100); - /* m = (y >> 16) & 8 */ - tcg_gen_sari_i32(m, y, 16); - tcg_gen_andi_i32(m, m, 8); - /* n = n + m */ - tcg_gen_add_i32(n, n, m); - /* x = x << m */ - tcg_gen_shl_i32(x, x, m); - - /* y = x - 0x1000 */ - tcg_gen_subi_i32(y, x, 0x1000); - /* m = (y >> 16) & 4 */ - tcg_gen_sari_i32(m, y, 16); - tcg_gen_andi_i32(m, m, 4); - /* n = n + m */ - tcg_gen_add_i32(n, n, m); - /* x = x << m */ - tcg_gen_shl_i32(x, x, m); - - /* y = x - 0x4000 */ - tcg_gen_subi_i32(y, x, 0x4000); - /* m = (y >> 16) & 2 */ - tcg_gen_sari_i32(m, y, 16); - tcg_gen_andi_i32(m, m, 2); - /* n = n + m */ - tcg_gen_add_i32(n, n, m); - /* x = x << m */ - tcg_gen_shl_i32(x, x, m); - - /* y = x >> 14 */ - tcg_gen_shri_i32(y, x, 14); - /* m = y & ~(y >> 1) */ - tcg_gen_sari_i32(m, y, 1); - tcg_gen_not_i32(m, m); - tcg_gen_and_i32(m, m, y); - - /* d = n + 2 - m */ - tcg_gen_addi_i32(d, n, 2); - tcg_gen_sub_i32(d, d, m); - - tcg_temp_free(y); - tcg_temp_free(m); - tcg_temp_free(n); -} - static void t_gen_cris_dstep(TCGv d, TCGv a, TCGv b) { int l1; @@ -825,7 +757,7 @@ static void cris_alu_op_exec(DisasContext *dc, int op, t_gen_subx_carry(dc, dst); break; case CC_OP_LZ: - t_gen_lz_i32(dst, b); + gen_helper_lz(dst, b); break; case CC_OP_MULS: t_gen_muls(dst, cpu_PR[PR_MOF], a, b); |