From: Jiufu Guo <guojiufu@linux.ibm.com>
To: gcc-patches@gcc.gnu.org
Cc: segher@kernel.crashing.org, dje.gcc@gmail.com, linkw@gcc.gnu.org,
bergner@linux.ibm.com, guojiufu@linux.ibm.com
Subject: [PATCH] rs6000: mark tieable between INT and FLOAT
Date: Mon, 28 Aug 2023 11:07:15 +0800 [thread overview]
Message-ID: <20230828030715.2310469-1-guojiufu@linux.ibm.com> (raw)
Hi,
For PowerPC, some INT mode and FLOAT modes can be marked as tieable,
for example: DI<->DF.
One note SFmode is special, it would only tieable with itself.
I updated previous patch more reasonable:
https://gcc.gnu.org/pipermail/gcc-patches/2023-January/609504.html
Bootstrap and regtest pass on ppc64{,le}.
Is this ok for trunk?
BR,
Jeff (Jiufu)
gcc/ChangeLog:
* config/rs6000/rs6000.cc (rs6000_modes_tieable_p): Mark more tieable
modes.
gcc/testsuite/ChangeLog:
* g++.target/powerpc/pr102024.C: Updated.
---
gcc/config/rs6000/rs6000.cc | 9 +++++++++
gcc/testsuite/g++.target/powerpc/pr102024.C | 3 ++-
2 files changed, 11 insertions(+), 1 deletion(-)
diff --git a/gcc/config/rs6000/rs6000.cc b/gcc/config/rs6000/rs6000.cc
index 6ac3adcec6b..3cb0186089e 100644
--- a/gcc/config/rs6000/rs6000.cc
+++ b/gcc/config/rs6000/rs6000.cc
@@ -1968,6 +1968,15 @@ rs6000_modes_tieable_p (machine_mode mode1, machine_mode mode2)
if (ALTIVEC_OR_VSX_VECTOR_MODE (mode2))
return false;
+ /* SFmode format (IEEE DP) in register would not as required,
+ So SFmode is restrict here. */
+ if (GET_MODE_CLASS (mode1) == MODE_FLOAT
+ && GET_MODE_CLASS (mode2) == MODE_INT)
+ return GET_MODE_SIZE (mode1) == UNITS_PER_FP_WORD;
+ if (GET_MODE_CLASS (mode1) == MODE_INT
+ && GET_MODE_CLASS (mode2) == MODE_FLOAT)
+ return GET_MODE_SIZE (mode2) == UNITS_PER_FP_WORD;
+
if (SCALAR_FLOAT_MODE_P (mode1))
return SCALAR_FLOAT_MODE_P (mode2);
if (SCALAR_FLOAT_MODE_P (mode2))
diff --git a/gcc/testsuite/g++.target/powerpc/pr102024.C b/gcc/testsuite/g++.target/powerpc/pr102024.C
index 769585052b5..27d2dc5e80b 100644
--- a/gcc/testsuite/g++.target/powerpc/pr102024.C
+++ b/gcc/testsuite/g++.target/powerpc/pr102024.C
@@ -5,7 +5,8 @@
// Test that a zero-width bit field in an otherwise homogeneous aggregate
// generates a psabi warning and passes arguments in GPRs.
-// { dg-final { scan-assembler-times {\mstd\M} 4 } }
+// { dg-final { scan-assembler-times {\mmtvsrd\M} 4 { target has_arch_pwr8 } } }
+// { dg-final { scan-assembler-times {\mstd\M} 4 { target { ! has_arch_pwr8 } } } }
struct a_thing
{
--
2.17.1
next reply other threads:[~2023-08-28 3:07 UTC|newest]
Thread overview: 5+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-08-28 3:07 Jiufu Guo [this message]
2023-09-18 3:48 ` Ping " Jiufu Guo
-- strict thread matches above, loose matches on Subject: below --
2023-01-06 12:25 Jiufu Guo
2023-02-21 1:32 ` Jiufu Guo
2023-04-26 2:54 ` Jiufu Guo
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