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authorRichard Henderson <rth@twiddle.net>2016-11-16 14:59:40 +0100
committerRichard Henderson <rth@twiddle.net>2017-01-10 08:06:11 -0800
commitcc0fec8a4d2a8546fe236a09bfd80150af9cbe6b (patch)
tree11323a82745c6c85bb6b02a25635abb5854f69e9 /tcg
parent53c76c19904983d2c81e4f5e77027c241918a479 (diff)
tcg/arm: Handle ctz and clz opcodes
Reviewed-by: Alex Bennée <alex.bennee@linaro.org> Signed-off-by: Richard Henderson <rth@twiddle.net>
Diffstat (limited to 'tcg')
-rw-r--r--tcg/arm/tcg-target.h4
-rw-r--r--tcg/arm/tcg-target.inc.c27
2 files changed, 29 insertions, 2 deletions
diff --git a/tcg/arm/tcg-target.h b/tcg/arm/tcg-target.h
index 02cc242c37..4cb94dc103 100644
--- a/tcg/arm/tcg-target.h
+++ b/tcg/arm/tcg-target.h
@@ -110,8 +110,8 @@ extern bool use_idiv_instructions;
#define TCG_TARGET_HAS_eqv_i32 0
#define TCG_TARGET_HAS_nand_i32 0
#define TCG_TARGET_HAS_nor_i32 0
-#define TCG_TARGET_HAS_clz_i32 0
-#define TCG_TARGET_HAS_ctz_i32 0
+#define TCG_TARGET_HAS_clz_i32 use_armv5t_instructions
+#define TCG_TARGET_HAS_ctz_i32 use_armv7_instructions
#define TCG_TARGET_HAS_deposit_i32 use_armv7_instructions
#define TCG_TARGET_HAS_extract_i32 use_armv7_instructions
#define TCG_TARGET_HAS_sextract_i32 use_armv7_instructions
diff --git a/tcg/arm/tcg-target.inc.c b/tcg/arm/tcg-target.inc.c
index ec0b861297..e75a6d4943 100644
--- a/tcg/arm/tcg-target.inc.c
+++ b/tcg/arm/tcg-target.inc.c
@@ -256,6 +256,9 @@ typedef enum {
ARITH_BIC = 0xe << 21,
ARITH_MVN = 0xf << 21,
+ INSN_CLZ = 0x016f0f10,
+ INSN_RBIT = 0x06ff0f30,
+
INSN_LDR_IMM = 0x04100000,
INSN_LDR_REG = 0x06100000,
INSN_STR_IMM = 0x04000000,
@@ -1829,6 +1832,28 @@ static inline void tcg_out_op(TCGContext *s, TCGOpcode opc,
}
break;
+ case INDEX_op_ctz_i32:
+ tcg_out_dat_reg(s, COND_AL, INSN_RBIT, TCG_REG_TMP, 0, args[1], 0);
+ a1 = TCG_REG_TMP;
+ goto do_clz;
+
+ case INDEX_op_clz_i32:
+ a1 = args[1];
+ do_clz:
+ a0 = args[0];
+ a2 = args[2];
+ c = const_args[2];
+ if (c && a2 == 32) {
+ tcg_out_dat_reg(s, COND_AL, INSN_CLZ, a0, 0, a1, 0);
+ break;
+ }
+ tcg_out_dat_imm(s, COND_AL, ARITH_CMP, 0, a1, 0);
+ tcg_out_dat_reg(s, COND_NE, INSN_CLZ, a0, 0, a1, 0);
+ if (c || a0 != a2) {
+ tcg_out_dat_rIK(s, COND_EQ, ARITH_MOV, ARITH_MVN, a0, 0, a2, c);
+ }
+ break;
+
case INDEX_op_brcond_i32:
tcg_out_dat_rIN(s, COND_AL, ARITH_CMP, ARITH_CMN, 0,
args[0], args[1], const_args[1]);
@@ -1963,6 +1988,8 @@ static const TCGTargetOpDef arm_op_defs[] = {
{ INDEX_op_sar_i32, { "r", "r", "ri" } },
{ INDEX_op_rotl_i32, { "r", "r", "ri" } },
{ INDEX_op_rotr_i32, { "r", "r", "ri" } },
+ { INDEX_op_clz_i32, { "r", "r", "rIK" } },
+ { INDEX_op_ctz_i32, { "r", "r", "rIK" } },
{ INDEX_op_brcond_i32, { "r", "rIN" } },
{ INDEX_op_setcond_i32, { "r", "r", "rIN" } },