Mesa (master): r600g: take into account force_add_cf in pops

[Alex Deucher]

Module: Mesa
Branch: master
Commit: 2bde0cc95d8db10b6d2c6689ca39c196a81248b0
URL:    http://cgit.freedesktop.org/mesa/mesa/commit/?id=2bde0cc95d8db10b6d2c6689ca39c196a81248b0

Author: Vadim Girlin <vadimgirlin at gmail.com>
Date:   Wed Aug  3 15:35:02 2011 +0400

r600g: take into account force_add_cf in pops

When we have two ENDIFs in a row, we shouldn't modify the pop_count
for the same alu clause twice.

Fixes https://bugs.freedesktop.org/show_bug.cgi?id=38163

Note: this is a candidate for the 7.11 branch.

Signed-off-by: Alex Deucher <alexander.deucher at amd.com>

---

 src/gallium/drivers/r600/r600_shader.c |   39 +++++++++++++++++++------------
 1 files changed, 24 insertions(+), 15 deletions(-)

diff --git a/src/gallium/drivers/r600/r600_shader.c b/src/gallium/drivers/r600/r600_shader.c
index fc56656..c55cdd7 100644
--- a/src/gallium/drivers/r600/r600_shader.c
+++ b/src/gallium/drivers/r600/r600_shader.c
@@ -2932,25 +2932,34 @@ static int emit_logic_pred(struct r600_shader_ctx *ctx, int opcode)
 
 static int pops(struct r600_shader_ctx *ctx, int pops)
 {
-	int alu_pop = 3;
-	if (ctx->bc->cf_last) {
-		if (ctx->bc->cf_last->inst == CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU) << 3)
-			alu_pop = 0;
-		else if (ctx->bc->cf_last->inst == CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER) << 3)
-			alu_pop = 1;
-	}
-	alu_pop += pops;
-	if (alu_pop == 1) {
-		ctx->bc->cf_last->inst = CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER) << 3;
-		ctx->bc->force_add_cf = 1;
-	} else if (alu_pop == 2) {
-		ctx->bc->cf_last->inst = CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER) << 3;
-		ctx->bc->force_add_cf = 1;
-	} else {
+	unsigned force_pop = ctx->bc->force_add_cf;
+
+	if (!force_pop) {
+		int alu_pop = 3;
+		if (ctx->bc->cf_last) {
+			if (ctx->bc->cf_last->inst == CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU) << 3)
+				alu_pop = 0;
+			else if (ctx->bc->cf_last->inst == CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER) << 3)
+				alu_pop = 1;
+		}
+		alu_pop += pops;
+		if (alu_pop == 1) {
+			ctx->bc->cf_last->inst = CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP_AFTER) << 3;
+			ctx->bc->force_add_cf = 1;
+		} else if (alu_pop == 2) {
+			ctx->bc->cf_last->inst = CTX_INST(V_SQ_CF_ALU_WORD1_SQ_CF_INST_ALU_POP2_AFTER) << 3;
+			ctx->bc->force_add_cf = 1;
+		} else {
+			force_pop = 1;
+		}
+	}
+
+	if (force_pop) {
 		r600_bc_add_cfinst(ctx->bc, CTX_INST(V_SQ_CF_WORD1_SQ_CF_INST_POP));
 		ctx->bc->cf_last->pop_count = pops;
 		ctx->bc->cf_last->cf_addr = ctx->bc->cf_last->id + 2;
 	}
+
 	return 0;
 }