From: James Jones <atari@theinnocuous.com>
Date: Mon, 13 Jun 2022 03:54:39 +0000 (-0700)
Subject: Fix pack/unpack instructions
X-Git-Tag: v2.2.4~2
X-Git-Url: http://shamusworld.gotdns.org/cgi-bin/gitweb.cgi?p=rmac;a=commitdiff_plain;h=e4747b998a04025ea409316ff23cf3b464fd99e8

Fix pack/unpack instructions

The GPU-specific PACK and UNPACK instructions
share opcode 63. PACK is chosen by encoding '0'
in the source operand, and UNPACK is chosen by
encoding '1' in the source operand. RMAC had the
magic source operand values reversed.
---

diff --git a/riscasm.c b/riscasm.c
index e31c104..c3bd88f 100644
--- a/riscasm.c
+++ b/riscasm.c
@@ -128,8 +128,8 @@ static const struct opcoderecord roptbl[] = {
 	{ MR_NORMI,   RI_TWO,    56 },
 	{ MR_NOP,     RI_NONE,   57 },
 	{ MR_SAT24,   RI_ONE,    62 },
-	{ MR_UNPACK,  RI_ONE,    63 + GPUONLY | (0 << 6) },
-	{ MR_PACK,    RI_ONE,    63 + GPUONLY | (1 << 6) },
+	{ MR_UNPACK,  RI_ONE,    63 + GPUONLY | (1 << 6) },
+	{ MR_PACK,    RI_ONE,    63 + GPUONLY | (0 << 6) },
 	{ MR_ADDQMOD, RI_NUM_32, 63 + DSPONLY },
 	{ MR_MOVE,    RI_MOVE,   0 },
 	{ MR_LOAD,    RI_LOAD,   0 },