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authorRoland Scheidegger <sroland@tungstengraphics.com>2008-04-12 02:40:27 +0200
committerRoland Scheidegger <sroland@tungstengraphics.com>2008-04-12 02:40:27 +0200
commit32134b5508495fbb1d9fc2f844e22fbb082dcda6 (patch)
tree02518cc8118be17a009c25facc6b3ace4eacaf91 /src/mesa/drivers
parent51ad219d6fbcdaa50e2f1b5854dfbbc4b8cab8fc (diff)
r200: fix XPD vertex program instruction when using temps as inputs
due to the two read ports limit into temp memory may need the MAD_2 instruction for the second instruction of the decomposed XPD. While here, also try to avoid MAD_2 for MAD if all 3 inputs are temps but the temps aren't actually distinct.
Diffstat (limited to 'src/mesa/drivers')
-rw-r--r--src/mesa/drivers/dri/r200/r200_vertprog.c16
1 files changed, 13 insertions, 3 deletions
diff --git a/src/mesa/drivers/dri/r200/r200_vertprog.c b/src/mesa/drivers/dri/r200/r200_vertprog.c
index 7fba6c750d..b1e027dc1c 100644
--- a/src/mesa/drivers/dri/r200/r200_vertprog.c
+++ b/src/mesa/drivers/dri/r200/r200_vertprog.c
@@ -745,9 +745,16 @@ static GLboolean r200_translate_vertex_program(GLcontext *ctx, struct r200_verte
goto next;
case OPCODE_MAD:
+ /* only 2 read ports into temp memory thus may need the macro op MAD_2
+ instead (requiring 2 clocks) if all inputs are in temp memory
+ (and, only if they actually reference 3 distinct temps) */
hw_op=(src[0].File == PROGRAM_TEMPORARY &&
src[1].File == PROGRAM_TEMPORARY &&
- src[2].File == PROGRAM_TEMPORARY) ? R200_VPI_OUT_OP_MAD_2 : R200_VPI_OUT_OP_MAD;
+ src[2].File == PROGRAM_TEMPORARY &&
+ (((src[0].RelAddr << 8) | src[0].Index) != ((src[1].RelAddr << 8) | src[1].Index)) &&
+ (((src[0].RelAddr << 8) | src[0].Index) != ((src[2].RelAddr << 8) | src[2].Index)) &&
+ (((src[1].RelAddr << 8) | src[1].Index) != ((src[2].RelAddr << 8) | src[2].Index))) ?
+ R200_VPI_OUT_OP_MAD_2 : R200_VPI_OUT_OP_MAD;
o_inst->op = MAKE_VSF_OP(hw_op, t_dst(&dst),
t_dst_mask(dst.WriteMask));
@@ -875,8 +882,11 @@ else {
case OPCODE_XPD:
/* mul r0, r1.yzxw, r2.zxyw
mad r0, -r2.yzxw, r1.zxyw, r0
- NOTE: might need MAD_2
*/
+ hw_op=(src[0].File == PROGRAM_TEMPORARY &&
+ src[1].File == PROGRAM_TEMPORARY &&
+ (((src[0].RelAddr << 8) | src[0].Index) != ((src[1].RelAddr << 8) | src[1].Index))) ?
+ R200_VPI_OUT_OP_MAD_2 : R200_VPI_OUT_OP_MAD;
o_inst->op = MAKE_VSF_OP(R200_VPI_OUT_OP_MUL,
(u_temp_i << R200_VPI_OUT_REG_INDEX_SHIFT) | R200_VSF_OUT_CLASS_TMP,
@@ -902,7 +912,7 @@ else {
o_inst++;
u_temp_i--;
- o_inst->op = MAKE_VSF_OP(R200_VPI_OUT_OP_MAD, t_dst(&dst),
+ o_inst->op = MAKE_VSF_OP(hw_op, t_dst(&dst),
t_dst_mask(dst.WriteMask));
o_inst->src0 = MAKE_VSF_SOURCE(t_src_index(vp, &src[1]),