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[Qemu-devel] [PATCH 33/65] target-s390x: Use clz opcode
From: |
Richard Henderson |
Subject: |
[Qemu-devel] [PATCH 33/65] target-s390x: Use clz opcode |
Date: |
Fri, 23 Dec 2016 20:00:10 -0800 |
Signed-off-by: Richard Henderson <address@hidden>
---
target/s390x/helper.h | 1 -
target/s390x/int_helper.c | 6 ------
target/s390x/translate.c | 2 +-
3 files changed, 1 insertion(+), 8 deletions(-)
diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index 207a6e7..9102071 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -70,7 +70,6 @@ DEF_HELPER_FLAGS_4(msdb, TCG_CALL_NO_WG, i64, env, i64, i64,
i64)
DEF_HELPER_FLAGS_3(tceb, TCG_CALL_NO_RWG_SE, i32, env, i64, i64)
DEF_HELPER_FLAGS_3(tcdb, TCG_CALL_NO_RWG_SE, i32, env, i64, i64)
DEF_HELPER_FLAGS_4(tcxb, TCG_CALL_NO_RWG_SE, i32, env, i64, i64, i64)
-DEF_HELPER_FLAGS_1(clz, TCG_CALL_NO_RWG_SE, i64, i64)
DEF_HELPER_FLAGS_2(sqeb, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_2(sqdb, TCG_CALL_NO_WG, i64, env, i64)
DEF_HELPER_FLAGS_3(sqxb, TCG_CALL_NO_WG, i64, env, i64, i64)
diff --git a/target/s390x/int_helper.c b/target/s390x/int_helper.c
index 370c94d..5bc470b 100644
--- a/target/s390x/int_helper.c
+++ b/target/s390x/int_helper.c
@@ -117,12 +117,6 @@ uint64_t HELPER(divu64)(CPUS390XState *env, uint64_t ah,
uint64_t al,
return ret;
}
-/* count leading zeros, for find leftmost one */
-uint64_t HELPER(clz)(uint64_t v)
-{
- return clz64(v);
-}
-
uint64_t HELPER(cvd)(int32_t reg)
{
/* positive 0 */
diff --git a/target/s390x/translate.c b/target/s390x/translate.c
index 6cebb7e..01c6217 100644
--- a/target/s390x/translate.c
+++ b/target/s390x/translate.c
@@ -2249,7 +2249,7 @@ static ExitStatus op_flogr(DisasContext *s, DisasOps *o)
gen_op_update1_cc_i64(s, CC_OP_FLOGR, o->in2);
/* R1 = IN ? CLZ(IN) : 64. */
- gen_helper_clz(o->out, o->in2);
+ tcg_gen_clzi_i64(o->out, o->in2, 64);
/* R1+1 = IN & ~(found bit). Note that we may attempt to shift this
value by 64, which is undefined. But since the shift is 64 iff the
--
2.9.3
- [Qemu-devel] [PATCH 22/65] tcg: Pass the opcode width to target_parse_constraint, (continued)
- [Qemu-devel] [PATCH 22/65] tcg: Pass the opcode width to target_parse_constraint, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 27/65] target-alpha: Use the ctz and clz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 29/65] target-microblaze: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 30/65] target-mips: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 24/65] tcg: Add clz and ctz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 28/65] target-cris: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 36/65] target-unicore32: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 32/65] target-ppc: Use clz and ctz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 31/65] target-openrisc: Use clz and ctz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 34/65] target-tilegx: Use clz and ctz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 33/65] target-s390x: Use clz opcode,
Richard Henderson <=
- [Qemu-devel] [PATCH 35/65] target-tricore: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 38/65] target-arm: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 39/65] target-i386: Use clz and ctz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 41/65] tcg/aarch64: Handle ctz and clz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 43/65] tcg/mips: Handle clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 37/65] target-xtensa: Use clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 44/65] tcg/s390: Handle clz opcode, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 40/65] tcg/ppc: Handle ctz and clz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 42/65] tcg/arm: Handle ctz and clz opcodes, Richard Henderson, 2016/12/23
- [Qemu-devel] [PATCH 52/65] target-tricore: Use clrsb helper, Richard Henderson, 2016/12/23