From 54f3a6fdf33bb974a1a4219d2afe31d326a4cf18 Mon Sep 17 00:00:00 2001
From: Alexander Horner <contact@alexhorner.cc>
Date: Fri, 16 Jun 2023 21:56:07 +0100
Subject: [PATCH] Revert instruction decompression for performance
---
minichlink/minichlink.c | 28 ++++++++++++----------------
1 file changed, 12 insertions(+), 16 deletions(-)
diff --git a/minichlink/minichlink.c b/minichlink/minichlink.c
index 36dbc9b..8c3e5ec 100644
--- a/minichlink/minichlink.c
+++ b/minichlink/minichlink.c
@@ -1307,30 +1307,26 @@ static int DefaultReadWord( void * dev, uint32_t address_to_read, uint32_t * dat
{
MCF.WriteReg32( dev, DMABSTRACTAUTO, 0 ); // Disable Autoexec.
- // lw x8,0(x11) // Pull the address from DATA1
- // lw x9,0(x8) // Read the data at that location.
- MCF.WriteReg32( dev, DMPROGBUF0, 0x0005a403 );
- MCF.WriteReg32( dev, DMPROGBUF1, 0x00042483 );
+ // c.lw x8,0(x11) // Pull the address from DATA1
+ // c.lw x9,0(x8) // Read the data at that location.
+ MCF.WriteReg32( dev, DMPROGBUF0, 0x40044180 );
if( autoincrement )
{
- // addi x8, x8, 4
- // sw x9, 0(x10) // Write back to DATA0
+ // c.addi x8, 4
+ // c.sw x9, 0(x10) // Write back to DATA0
- MCF.WriteReg32( dev, DMPROGBUF2, 0x00440413 );
- MCF.WriteReg32( dev, DMPROGBUF3, 0x00952023 );
+ MCF.WriteReg32( dev, DMPROGBUF1, 0xc1040411 );
}
else
{
- // nop // ADDI x0, x0, 0
- // sw x9, 0(x10) // Write back to DATA0
+ // c.nop
+ // c.sw x9, 0(x10) // Write back to DATA0
- MCF.WriteReg32( dev, DMPROGBUF2, 0x00000013 );
- MCF.WriteReg32( dev, DMPROGBUF3, 0x00952023 );
+ MCF.WriteReg32( dev, DMPROGBUF1, 0xc1040001 );
}
- // sw x8, 0(x11) // Write addy to DATA1
- // ebreak
- MCF.WriteReg32( dev, DMPROGBUF4, 0x0085a023 );
- MCF.WriteReg32( dev, DMPROGBUF5, 0x00100073 );
+ // c.sw x8, 0(x11) // Write addy to DATA1
+ // c.ebreak
+ MCF.WriteReg32( dev, DMPROGBUF2, 0x9002c180 );
if( iss->statetag != STTAG( "WRSQ" ) )
{
--
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