diff mbox series

[for-8.0,v2,04/13] target/s390x: Use a single return for helper_divs32/u32

Message ID 20221111080820.2132412-5-richard.henderson@linaro.org
State Superseded
Headers show
Series target/s390x: Use TCGv_i128 | expand

Commit Message

Richard Henderson Nov. 11, 2022, 8:08 a.m. UTC 
Pack the quotient and remainder into a single uint64_t.

Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
v2: Fix operand ordering; use tcg_extr32_i64.
---
 target/s390x/helper.h         |  2 +-
 target/s390x/tcg/int_helper.c | 26 +++++++++++++-------------
 target/s390x/tcg/translate.c  |  8 ++++----
 3 files changed, 18 insertions(+), 18 deletions(-)

Comments

Ilya Leoshkevich Nov. 28, 2022, 9:42 p.m. UTC | #1 
On Fri, Nov 11, 2022 at 06:08:11PM +1000, Richard Henderson wrote:
> Pack the quotient and remainder into a single uint64_t.
> 
> Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
> ---
> v2: Fix operand ordering; use tcg_extr32_i64.
> ---
>  target/s390x/helper.h         |  2 +-
>  target/s390x/tcg/int_helper.c | 26 +++++++++++++-------------
>  target/s390x/tcg/translate.c  |  8 ++++----
>  3 files changed, 18 insertions(+), 18 deletions(-)

Acked-by: Ilya Leoshkevich <iii@linux.ibm.com>
diff mbox series

Patch

diff --git a/target/s390x/helper.h b/target/s390x/helper.h
index bf33d86f74..97a9668eef 100644
--- a/target/s390x/helper.h
+++ b/target/s390x/helper.h
@@ -10,7 +10,7 @@  DEF_HELPER_FLAGS_4(clc, TCG_CALL_NO_WG, i32, env, i32, i64, i64)
 DEF_HELPER_3(mvcl, i32, env, i32, i32)
 DEF_HELPER_3(clcl, i32, env, i32, i32)
 DEF_HELPER_FLAGS_4(clm, TCG_CALL_NO_WG, i32, env, i32, i32, i64)
-DEF_HELPER_FLAGS_3(divs32, TCG_CALL_NO_WG, s64, env, s64, s64)
+DEF_HELPER_FLAGS_3(divs32, TCG_CALL_NO_WG, i64, env, s64, s64)
 DEF_HELPER_FLAGS_3(divu32, TCG_CALL_NO_WG, i64, env, i64, i64)
 DEF_HELPER_FLAGS_3(divs64, TCG_CALL_NO_WG, s64, env, s64, s64)
 DEF_HELPER_FLAGS_4(divu64, TCG_CALL_NO_WG, i64, env, i64, i64, i64)
diff --git a/target/s390x/tcg/int_helper.c b/target/s390x/tcg/int_helper.c
index 954542388a..7260583cf2 100644
--- a/target/s390x/tcg/int_helper.c
+++ b/target/s390x/tcg/int_helper.c
@@ -34,45 +34,45 @@ 
 #endif
 
 /* 64/32 -> 32 signed division */
-int64_t HELPER(divs32)(CPUS390XState *env, int64_t a, int64_t b64)
+uint64_t HELPER(divs32)(CPUS390XState *env, int64_t a, int64_t b64)
 {
-    int32_t ret, b = b64;
-    int64_t q;
+    int32_t b = b64;
+    int64_t q, r;
 
     if (b == 0) {
         tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC());
     }
 
-    ret = q = a / b;
-    env->retxl = a % b;
+    q = a / b;
+    r = a % b;
 
     /* Catch non-representable quotient.  */
-    if (ret != q) {
+    if (q != (int32_t)q) {
         tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC());
     }
 
-    return ret;
+    return deposit64(q, 32, 32, r);
 }
 
 /* 64/32 -> 32 unsigned division */
 uint64_t HELPER(divu32)(CPUS390XState *env, uint64_t a, uint64_t b64)
 {
-    uint32_t ret, b = b64;
-    uint64_t q;
+    uint32_t b = b64;
+    uint64_t q, r;
 
     if (b == 0) {
         tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC());
     }
 
-    ret = q = a / b;
-    env->retxl = a % b;
+    q = a / b;
+    r = a % b;
 
     /* Catch non-representable quotient.  */
-    if (ret != q) {
+    if (q != (uint32_t)q) {
         tcg_s390_program_interrupt(env, PGM_FIXPT_DIVIDE, GETPC());
     }
 
-    return ret;
+    return deposit64(q, 32, 32, r);
 }
 
 /* 64/64 -> 64 signed division */
diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 2fbdab7252..9c2ea15c8d 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -2395,15 +2395,15 @@  static DisasJumpType op_diag(DisasContext *s, DisasOps *o)
 
 static DisasJumpType op_divs32(DisasContext *s, DisasOps *o)
 {
-    gen_helper_divs32(o->out2, cpu_env, o->in1, o->in2);
-    return_low128(o->out);
+    gen_helper_divs32(o->out, cpu_env, o->in1, o->in2);
+    tcg_gen_extr32_i64(o->out2, o->out, o->out);
     return DISAS_NEXT;
 }
 
 static DisasJumpType op_divu32(DisasContext *s, DisasOps *o)
 {
-    gen_helper_divu32(o->out2, cpu_env, o->in1, o->in2);
-    return_low128(o->out);
+    gen_helper_divu32(o->out, cpu_env, o->in1, o->in2);
+    tcg_gen_extr32_i64(o->out2, o->out, o->out);
     return DISAS_NEXT;
 }