From: Gabe Black <gabeblack@google.com>
Date: Mon, 4 Nov 2019 23:05:18 +0000 (-0800)
Subject: arm: Set the number of FloatRegs to zero.
X-Git-Tag: v19.0.0.0~314
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=27c262735cb6d33b01e21e1f3ba73a32965024b9;p=gem5.git

arm: Set the number of FloatRegs to zero.

ARM no longer uses the floating point register file and uses the
vector registers instead. This avoids checkpointing a bunch of unused
registers, making it hard to tell where floating point instructions
are keeping their values, etc.

Change-Id: I23145ba750f1dd9ff5b815395e073c410120840d
Reviewed-on: https://gem5-review.googlesource.com/c/public/gem5/+/22524
Reviewed-by: Giacomo Travaglini <giacomo.travaglini@arm.com>
Maintainer: Giacomo Travaglini <giacomo.travaglini@arm.com>
Tested-by: kokoro <noreply+kokoro@google.com>
---

diff --git a/src/arch/arm/registers.hh b/src/arch/arm/registers.hh
index 75945ad81..a97a4ce25 100644
--- a/src/arch/arm/registers.hh
+++ b/src/arch/arm/registers.hh
@@ -83,14 +83,13 @@ const int NumIntArchRegs = NUM_ARCH_INTREGS;
 // The number of single precision floating point registers
 const int NumFloatV7ArchRegs  = 64;
 const int NumFloatV8ArchRegs  = 128;
-const int NumFloatSpecialRegs = 32;
 const int NumVecV7ArchRegs  = 64;
 const int NumVecV8ArchRegs  = 32;
 const int NumVecSpecialRegs = 8;
 
 const int NumVecIntrlvRegs = 4;
 const int NumIntRegs = NUM_INTREGS;
-const int NumFloatRegs = NumFloatV8ArchRegs + NumFloatSpecialRegs;
+const int NumFloatRegs = 0; // Float values are stored in the VecRegs
 const int NumVecRegs = NumVecV8ArchRegs + NumVecSpecialRegs + NumVecIntrlvRegs;
 const int VECREG_UREG0 = 32;
 const int NumVecPredRegs = 18;  // P0-P15, FFR, UREG0