CRIS: Use a helper for lz.

Signed-off-by: Edgar E. Iglesias <edgar.iglesias@gmail.com>


git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@6205 c046a42c-6fe2-441c-8c8c-71466251a162

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);