r300g: implement ARR opcode

Same as ARL, just has extra rounding.
Useful for st/nine.

Tested-by: Pavel Ondračka <[email protected]>
Reviewed-by: Marek Olšák <[email protected]>
Signed-off-by: David Heidelberg <[email protected]>
Reviewed-by: Alex Deucher <[email protected]>

3 files changed, 15 insertions, 3 deletions

diff --git a/src/gallium/drivers/r300/compiler/r3xx_vertprog.c b/src/gallium/drivers/r300/compiler/r3xx_vertprog.c
index fd4f6f4045e..2ff6db54637 100644
--- a/src/gallium/drivers/r300/compiler/r3xx_vertprog.c
+++ b/src/gallium/drivers/r300/compiler/r3xx_vertprog.c
@@ -405,6 +405,7 @@ static void translate_vertex_program(struct radeon_compiler *c, void *user)
 		switch (vpi->Opcode) {
 		case RC_OPCODE_ADD: ei_vector2(compiler->code, VE_ADD, vpi, inst); break;
 		case RC_OPCODE_ARL: ei_vector1(compiler->code, VE_FLT2FIX_DX, vpi, inst); break;
+		case RC_OPCODE_ARR: ei_vector1(compiler->code, VE_FLT2FIX_DX_RND, vpi, inst); break;
 		case RC_OPCODE_COS: ei_math1(compiler->code, ME_COS, vpi, inst); break;
 		case RC_OPCODE_DP4: ei_vector2(compiler->code, VE_DOT_PRODUCT, vpi, inst); break;
 		case RC_OPCODE_DST: ei_vector2(compiler->code, VE_DISTANCE_VECTOR, vpi, inst); break;
@@ -798,7 +799,7 @@ static void transform_negative_addressing(struct r300_vertex_program_compiler *c
 	struct rc_instruction *inst, *add;
 	unsigned const_swizzle;
 
-	/* Transform ARL */
+	/* Transform ARL/ARR */
 	add = rc_insert_new_instruction(&c->Base, arl->Prev);
 	add->U.I.Opcode = RC_OPCODE_ADD;
 	add->U.I.DstReg.File = RC_FILE_TEMPORARY;
@@ -833,7 +834,7 @@ static void rc_emulate_negative_addressing(struct radeon_compiler *compiler, voi
 	for (inst = c->Base.Program.Instructions.Next; inst != &c->Base.Program.Instructions; inst = inst->Next) {
 		const struct rc_opcode_info * opcode = rc_get_opcode_info(inst->U.I.Opcode);
 
-		if (inst->U.I.Opcode == RC_OPCODE_ARL) {
+		if (inst->U.I.Opcode == RC_OPCODE_ARL || inst->U.I.Opcode == RC_OPCODE_ARR) {
 			if (lastARL != NULL && min_offset < 0)
 				transform_negative_addressing(c, lastARL, inst, min_offset);
 
@@ -847,7 +848,7 @@ static void rc_emulate_negative_addressing(struct radeon_compiler *compiler, voi
 			    inst->U.I.SrcReg[i].Index < 0) {
 				/* ARL must precede any indirect addressing. */
 				if (lastARL == NULL) {
-					rc_error(&c->Base, "Vertex shader: Found relative addressing without ARL.");
+					rc_error(&c->Base, "Vertex shader: Found relative addressing without ARL/ARR.");
 					return;
 				}
 
diff --git a/src/gallium/drivers/r300/compiler/radeon_opcodes.c b/src/gallium/drivers/r300/compiler/radeon_opcodes.c
index 916baa23608..a251bbe45d0 100644
--- a/src/gallium/drivers/r300/compiler/radeon_opcodes.c
+++ b/src/gallium/drivers/r300/compiler/radeon_opcodes.c
@@ -60,6 +60,12 @@ struct rc_opcode_info rc_opcodes[MAX_RC_OPCODE] = {
 		.HasDstReg = 1
 	},
 	{
+		.Opcode = RC_OPCODE_ARR,
+		.Name = "ARR",
+		.NumSrcRegs = 1,
+		.HasDstReg = 1
+	},
+	{
 		.Opcode = RC_OPCODE_CEIL,
 		.Name = "CEIL",
 		.NumSrcRegs = 1,
@@ -546,6 +552,7 @@ void rc_compute_sources_for_writemask(
 	} else {
 		switch(opcode->Opcode) {
 		case RC_OPCODE_ARL:
+		case RC_OPCODE_ARR:
 			srcmasks[0] |= RC_MASK_X;
 			break;
 		case RC_OPCODE_DP2:
diff --git a/src/gallium/drivers/r300/compiler/radeon_opcodes.h b/src/gallium/drivers/r300/compiler/radeon_opcodes.h
index 0a70901a82f..1c425050727 100644
--- a/src/gallium/drivers/r300/compiler/radeon_opcodes.h
+++ b/src/gallium/drivers/r300/compiler/radeon_opcodes.h
@@ -47,6 +47,10 @@ typedef enum {
 	 * dst.x = floor(src.x), where dst must be an address register */
 	RC_OPCODE_ARL,
 
+	/** special instruction: load address register with round
+	 * dst.x = round(src.x), where dst must be an address register */
+	RC_OPCODE_ARR,
+
 	/** vec4 instruction: dst.c = ceil(src0.c) */
 	RC_OPCODE_CEIL,