From ca02833f22b08ceeeff501107371aa6667426115 Mon Sep 17 00:00:00 2001
From: Alejandro Soto <alejandro@34project.org>
Date: Sun, 5 May 2024 17:38:55 -0600
Subject: rtl/gfx: rename platform/wavelet3d -> rtl/gfx

---
 rtl/gfx/gfx_isa.sv | 84 ++++++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 84 insertions(+)
 create mode 100644 rtl/gfx/gfx_isa.sv

(limited to 'rtl/gfx/gfx_isa.sv')

diff --git a/rtl/gfx/gfx_isa.sv b/rtl/gfx/gfx_isa.sv
new file mode 100644
index 0000000..7239478
--- /dev/null
+++ b/rtl/gfx/gfx_isa.sv
@@ -0,0 +1,84 @@
+package gfx_isa;
+
+	typedef logic[3:0] sgpr_num;
+	typedef logic[2:0] vgpr_num;
+
+	typedef logic signed[7:0] pc_offset;
+
+	typedef union packed
+	{
+		sgpr_num sgpr;
+
+		struct packed
+		{
+			logic[$bits(sgpr_num) - $bits(vgpr_num) - 1:0] reserved;
+			vgpr_num                                       num;
+		} vgpr;
+	} xgpr_num;
+
+	typedef struct packed
+	{
+		enum logic[1:0]
+		{
+			REGS_SVS = 2'b00,
+			REGS_SSS = 2'b01,
+			REGS_VVS = 2'b10,
+			REGS_VVV = 2'b11
+		} reg_mode;
+
+		union packed
+		{
+			struct packed
+			{
+				logic b_is_imm;
+
+				union packed
+				{
+					logic[12:0] imm;
+
+					struct packed
+					{
+						logic      from_consts;
+						logic[7:0] reserved;
+						xgpr_num   r;
+					} read;
+				} b;
+
+				xgpr_num ra,
+				         rd;
+			} rr;
+		} dst_src;
+
+		logic reg_rev;
+
+		union packed
+		{
+			struct packed
+			{
+				enum logic[4:0]
+				{
+					INSN_FPINT_MOV  = 0,
+					INSN_FPINT_FMUL = 1,
+					INSN_FPINT_IMUL = 2,
+					INSN_FPINT_FADD = 3,
+					INSN_FPINT_RES4 = 4,
+					INSN_FPINT_FMAX = 5,
+					INSN_FPINT_RES6 = 6,
+					INSN_FPINT_FMIN = 7,
+					INSN_FPINT_RES8 = 8,
+					INSN_FPINT_FCVT = 9,
+					INSN_FPINT_RES[10:31]
+				} op;
+			} fpint;
+		} by_class;
+
+		enum logic[1:0]
+		{
+			INSN_FPINT = 0,
+			INSN_MEM   = 1,
+			INSN_SFU   = 2,
+			INSN_GROUP = 3
+		} insn_class;
+	} insn_word;
+
+endpackage
-- 
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