From: Rob Clark <robdclark@chromium.org>
Date: Sat, 13 Jun 2020 03:56:48 +0000 (-0700)
Subject: freedreno/ir3: decouple regset from gpu gen
X-Git-Url: https://git.libre-soc.org/?a=commitdiff_plain;h=38df3f899da226138e67baf18a5b183e0a65807e;p=mesa.git

freedreno/ir3: decouple regset from gpu gen

Allow different regset's to coexist, so we can make mergedregs vs split
reg file a variant property.

Signed-off-by: Rob Clark <robdclark@chromium.org>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/5458>
---

diff --git a/src/freedreno/ir3/ir3.h b/src/freedreno/ir3/ir3.h
index d3e4a988dd9..bdfce559aab 100644
--- a/src/freedreno/ir3/ir3.h
+++ b/src/freedreno/ir3/ir3.h
@@ -1317,7 +1317,7 @@ bool ir3_postsched(struct ir3 *ir);
 bool ir3_a6xx_fixup_atomic_dests(struct ir3 *ir, struct ir3_shader_variant *so);
 
 /* register assignment: */
-struct ir3_ra_reg_set * ir3_ra_alloc_reg_set(struct ir3_compiler *compiler);
+struct ir3_ra_reg_set * ir3_ra_alloc_reg_set(struct ir3_compiler *compiler, bool mergedregs);
 int ir3_ra(struct ir3_shader_variant *v, struct ir3_instruction **precolor, unsigned nprecolor);
 
 /* legalize: */
diff --git a/src/freedreno/ir3/ir3_compiler.c b/src/freedreno/ir3/ir3_compiler.c
index 76404fd7a52..7e74f9ba6da 100644
--- a/src/freedreno/ir3/ir3_compiler.c
+++ b/src/freedreno/ir3/ir3_compiler.c
@@ -60,9 +60,10 @@ struct ir3_compiler * ir3_compiler_create(struct fd_device *dev, uint32_t gpu_id
 
 	compiler->dev = dev;
 	compiler->gpu_id = gpu_id;
-	compiler->set = ir3_ra_alloc_reg_set(compiler);
+	compiler->set = ir3_ra_alloc_reg_set(compiler, false);
 
 	if (compiler->gpu_id >= 600) {
+		compiler->mergedregs_set = ir3_ra_alloc_reg_set(compiler, true);
 		compiler->samgq_workaround = true;
 	}
 
diff --git a/src/freedreno/ir3/ir3_compiler.h b/src/freedreno/ir3/ir3_compiler.h
index a5af717471e..b777edf6311 100644
--- a/src/freedreno/ir3/ir3_compiler.h
+++ b/src/freedreno/ir3/ir3_compiler.h
@@ -35,6 +35,7 @@ struct ir3_compiler {
 	struct fd_device *dev;
 	uint32_t gpu_id;
 	struct ir3_ra_reg_set *set;
+	struct ir3_ra_reg_set *mergedregs_set;
 	uint32_t shader_count;
 
 	/*
diff --git a/src/freedreno/ir3/ir3_ra.c b/src/freedreno/ir3/ir3_ra.c
index c9a1b679116..7812a5b7026 100644
--- a/src/freedreno/ir3/ir3_ra.c
+++ b/src/freedreno/ir3/ir3_ra.c
@@ -1488,7 +1488,8 @@ ir3_ra_pass(struct ir3_shader_variant *v, struct ir3_instruction **precolor,
 	struct ir3_ra_ctx ctx = {
 			.v = v,
 			.ir = v->ir,
-			.set = v->ir->compiler->set,
+			.set = (v->ir->compiler->gpu_id >= 600) ?
+				v->ir->compiler->mergedregs_set : v->ir->compiler->set,
 			.scalar_pass = scalar_pass,
 	};
 	int ret;
diff --git a/src/freedreno/ir3/ir3_ra_regset.c b/src/freedreno/ir3/ir3_ra_regset.c
index 48fd9f106e8..c9e6c8e21cb 100644
--- a/src/freedreno/ir3/ir3_ra_regset.c
+++ b/src/freedreno/ir3/ir3_ra_regset.c
@@ -105,7 +105,7 @@ setup_conflicts(struct ir3_ra_reg_set *set)
  * really just four scalar registers.  Don't let that confuse you.)
  */
 struct ir3_ra_reg_set *
-ir3_ra_alloc_reg_set(struct ir3_compiler *compiler)
+ir3_ra_alloc_reg_set(struct ir3_compiler *compiler, bool mergedregs)
 {
 	struct ir3_ra_reg_set *set = rzalloc(compiler, struct ir3_ra_reg_set);
 	unsigned ra_reg_count, reg, base;
@@ -195,7 +195,7 @@ ir3_ra_alloc_reg_set(struct ir3_compiler *compiler)
 	 * And finally setup conflicts.  Starting a6xx, half precision regs
 	 * conflict w/ full precision regs (when using MERGEDREGS):
 	 */
-	if (compiler->gpu_id >= 600) {
+	if (mergedregs) {
 		for (unsigned i = 0; i < CLASS_REGS(0) / 2; i++) {
 			unsigned freg  = set->gpr_to_ra_reg[0][i];
 			unsigned hreg0 = set->gpr_to_ra_reg[0 + HALF_OFFSET][(i * 2) + 0];