freedreno/a3xx/compiler: implement SUB

Signed-off-by: Rob Clark <robclark@freedesktop.org>

diff --git a/src/gallium/drivers/freedreno/a3xx/fd3_compiler.c b/src/gallium/drivers/freedreno/a3xx/fd3_compiler.c
index be6ecdc..b05b272 100644 (file)
--- a/src/gallium/drivers/freedreno/a3xx/fd3_compiler.c
+++ b/src/gallium/drivers/freedreno/a3xx/fd3_compiler.c
@@ -556,7 +556,10 @@ vectorize(struct fd3_compile_context *ctx, struct ir3_instruction *instr,
                struct tgsi_src_register *src =
                                va_arg(ap, struct tgsi_src_register *);
                unsigned flags = va_arg(ap, unsigned);
-               add_src_reg(ctx, instr, src, 0)->flags |= flags;
+               struct ir3_register *reg = add_src_reg(ctx, instr, src, 0);
+               reg->flags |= flags & ~IR3_REG_NEGATE;
+               if (flags & IR3_REG_NEGATE)
+                       reg->flags ^= IR3_REG_NEGATE;
        }
        va_end(ap);
 
@@ -1288,12 +1291,15 @@ instr_cat2(const struct instr_translater *t,
        struct tgsi_src_register *src0 = &inst->Src[0].Register;
        struct tgsi_src_register *src1 = &inst->Src[1].Register;
        struct ir3_instruction *instr;
-       unsigned src0_flags = 0;
+       unsigned src0_flags = 0, src1_flags = 0;
 
        switch (t->tgsi_opc) {
        case TGSI_OPCODE_ABS:
                src0_flags = IR3_REG_ABS;
                break;
+       case TGSI_OPCODE_SUB:
+               src1_flags = IR3_REG_NEGATE;
+               break;
        }
 
        switch (t->opc) {
@@ -1320,7 +1326,8 @@ instr_cat2(const struct instr_translater *t,
                        src0 = get_unconst(ctx, src0);
 
                instr = ir3_instr_create(ctx->ir, 2, t->opc);
-               vectorize(ctx, instr, dst, 2, src0, src0_flags, src1, 0);
+               vectorize(ctx, instr, dst, 2, src0, src0_flags,
+                               src1, src1_flags);
                break;
        }
 
@@ -1410,6 +1417,7 @@ static const struct instr_translater translaters[TGSI_OPCODE_LAST] = {
        INSTR(SQRT,         instr_cat4, .opc = OPC_SQRT),
        INSTR(MUL,          instr_cat2, .opc = OPC_MUL_F),
        INSTR(ADD,          instr_cat2, .opc = OPC_ADD_F),
+       INSTR(SUB,          instr_cat2, .opc = OPC_ADD_F),
        INSTR(DP2,          trans_dotp, .arg = 2),
        INSTR(DP3,          trans_dotp, .arg = 3),
        INSTR(DP4,          trans_dotp, .arg = 4),