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[PATCH 1/9] target/s390x: Use a single return for helper_divs32/u32
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From: |
Richard Henderson |
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Subject: |
[PATCH 1/9] target/s390x: Use a single return for helper_divs32/u32 |
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Date: |
Fri, 21 Oct 2022 17:29:58 +1000 |
Pack the quotient and remainder into a single uint64_t.
Signed-off-by: Richard Henderson <richard.henderson@linaro.org>
---
target/s390x/helper.h | 2 +-
target/s390x/tcg/int_helper.c | 26 +++++++++++++-------------
target/s390x/tcg/translate.c | 10 ++++++----
3 files changed, 20 insertions(+), 18 deletions(-)
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..130b8bd4d2 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(r, 32, 32, q);
}
/* 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(r, 32, 32, q);
}
/* 64/64 -> 64 signed division */
diff --git a/target/s390x/tcg/translate.c b/target/s390x/tcg/translate.c
index 1d2dddab1c..525317c9df 100644
--- a/target/s390x/tcg/translate.c
+++ b/target/s390x/tcg/translate.c
@@ -2395,15 +2395,17 @@ 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_ext32u_i64(o->out2, o->out);
+ tcg_gen_shri_i64(o->out, o->out, 32);
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_ext32u_i64(o->out2, o->out);
+ tcg_gen_shri_i64(o->out, o->out, 32);
return DISAS_NEXT;
}
--
2.34.1