Jordi Vaquero has submitted this change. (
https://gem5-review.googlesource.com/c/public/gem5/+/28247 )
Change subject: arch-arm: Fix clasta/b and lasta/b simd&fp instructions
..
arch-arm: Fix clasta/b and lasta/b simd&fp instructions
The simd&fp version of this instructions required zeroing the result
vector except for the first element, that contains the result.
Change-Id: I231ad3c44d89f34acae26d299ab676e2ed09acdc
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/28247
Reviewed-by: Giacomo Travaglini
Maintainer: Giacomo Travaglini
Tested-by: kokoro
---
M src/arch/arm/isa/insts/sve.isa
1 file changed, 10 insertions(+), 1 deletion(-)
Approvals:
Giacomo Travaglini: Looks good to me, approved; Looks good to me, approved
kokoro: Regressions pass
diff --git a/src/arch/arm/isa/insts/sve.isa b/src/arch/arm/isa/insts/sve.isa
index 06ff728..aa4f194 100644
--- a/src/arch/arm/isa/insts/sve.isa
+++ b/src/arch/arm/isa/insts/sve.isa
@@ -2432,7 +2432,16 @@
elif destType == DstRegType.SimdFpScalar:
code += ''' else {
AA64FpDest_x[0] = AA64FpDestMerge_x[0];
-}'''
+}
+'''
+if destType == DstRegType.SimdFpScalar:
+# This section will extend zeros to the simdFP scalar
+# intructions for lasta/b and Clasta/b
+code += '''
+for (int i = 1; i < eCount; ++i) {
+AA64FpDest_x[i] = (Element)0x0;
+}
+'''
iop = InstObjParams(name, 'Sve' + Name, 'SveSelectOp',
{'code': code, 'op_class': opClass,
'isCond': 'true' if isCond else 'false',
--
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Gerrit-Project: public/gem5
Gerrit-Branch: develop
Gerrit-Change-Id: I231ad3c44d89f34acae26d299ab676e2ed09acdc
Gerrit-Change-Number: 28247
Gerrit-PatchSet: 2
Gerrit-Owner: Jordi Vaquero
Gerrit-Reviewer: Ciro Santilli
Gerrit-Reviewer: Giacomo Travaglini
Gerrit-Reviewer: Jordi Vaquero
Gerrit-Reviewer: kokoro
Gerrit-MessageType: merged
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