nv50: add support for DDX and DDY opcodes

diff --git a/src/gallium/drivers/nv50/nv50_program.c b/src/gallium/drivers/nv50/nv50_program.c
index 576d075318f9b187bc8ba7a3cb5ebaafa7dcddf9..89e0ac8db9fedfa1e651d9ca54ae22c15373b436 100644 (file)
--- a/src/gallium/drivers/nv50/nv50_program.c
+++ b/src/gallium/drivers/nv50/nv50_program.c
@@ -837,7 +837,7 @@ emit_precossin(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
 #define CVTOP_SAT      0x08
 #define CVTOP_ABS      0x10
 
-/* 0x04 == 32 bit */
+/* 0x04 == 32 bit dst */
 /* 0x40 == dst is float */
 /* 0x80 == src is float */
 #define CVT_F32_F32 0xc4
@@ -858,7 +858,7 @@ emit_cvt(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src,
        set_long(pc, e);
 
        e->inst[0] |= 0xa0000000;
-       e->inst[1] |= 0x00004000;
+       e->inst[1] |= 0x00004000; /* 32 bit src */
        e->inst[1] |= (cvn << 16);
        e->inst[1] |= (fmt << 24);
        set_src_0(pc, src, e);
@@ -1037,20 +1037,10 @@ emit_lit(struct nv50_pc *pc, struct nv50_reg **dst, unsigned mask,
        FREE(one);
 }
 
-static void
+static INLINE void
 emit_neg(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
 {
-       struct nv50_program_exec *e = exec(pc);
-
-       set_long(pc, e);
-       e->inst[0] |= 0xa0000000; /* delta */
-       e->inst[1] |= (7 << 29); /* delta */
-       e->inst[1] |= 0x04000000; /* negate arg0? probably not */
-       e->inst[1] |= (1 << 14); /* src .f32 */
-       set_dst(pc, dst, e);
-       set_src_0(pc, src, e);
-
-       emit(pc, e);
+       emit_cvt(pc, dst, src, -1, CVTOP_RN, CVT_F32_F32 | CVT_NEG);
 }
 
 static void
@@ -1218,6 +1208,43 @@ emit_nop(struct nv50_pc *pc)
        emit(pc, e);
 }
 
+static void
+emit_ddx(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
+{
+       struct nv50_program_exec *e = exec(pc);
+
+       assert(src->type == P_TEMP);
+
+       e->inst[0] = 0xc0140000;
+       e->inst[1] = 0x89800000;
+       set_long(pc, e);
+       set_dst(pc, dst, e);
+       set_src_0(pc, src, e);
+       set_src_2(pc, src, e);
+
+       emit(pc, e);
+}
+
+static void
+emit_ddy(struct nv50_pc *pc, struct nv50_reg *dst, struct nv50_reg *src)
+{
+       struct nv50_program_exec *e = exec(pc);
+
+       assert(src->type == P_TEMP);
+
+       if (!src->neg) /* ! double negation */
+               emit_neg(pc, src, src);
+
+       e->inst[0] = 0xc0150000;
+       e->inst[1] = 0x8a400000;
+       set_long(pc, e);
+       set_dst(pc, dst, e);
+       set_src_0(pc, src, e);
+       set_src_2(pc, src, e);
+
+       emit(pc, e);
+}
+
 static void
 convert_to_long(struct nv50_pc *pc, struct nv50_program_exec *e)
 {
@@ -1270,6 +1297,7 @@ static boolean
 negate_supported(const struct tgsi_full_instruction *insn, int i)
 {
        switch (insn->Instruction.Opcode) {
+       case TGSI_OPCODE_DDY:
        case TGSI_OPCODE_DP3:
        case TGSI_OPCODE_DP4:
        case TGSI_OPCODE_MUL:
@@ -1660,6 +1688,20 @@ nv50_program_tx_insn(struct nv50_pc *pc,
                emit_precossin(pc, temp, src[0][0]);
                emit_flop(pc, 5, brdc, temp);
                break;
+       case TGSI_OPCODE_DDX:
+               for (c = 0; c < 4; c++) {
+                       if (!(mask & (1 << c)))
+                               continue;
+                       emit_ddx(pc, dst[c], src[0][c]);
+               }
+               break;
+       case TGSI_OPCODE_DDY:
+               for (c = 0; c < 4; c++) {
+                       if (!(mask & (1 << c)))
+                               continue;
+                       emit_ddy(pc, dst[c], src[0][c]);
+               }
+               break;
        case TGSI_OPCODE_DP3:
                emit_mul(pc, temp, src[0][0], src[1][0]);
                emit_mad(pc, temp, src[0][1], src[1][1], temp);