nvfx: implement SSG in fp

diff --git a/src/gallium/drivers/nvfx/nvfx_fragprog.c b/src/gallium/drivers/nvfx/nvfx_fragprog.c
index 40cd410..ebd3eb8 100644 (file)
--- a/src/gallium/drivers/nvfx/nvfx_fragprog.c
+++ b/src/gallium/drivers/nvfx/nvfx_fragprog.c
@@ -457,7 +457,7 @@ nvfx_fragprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_fpc *fpc,
 {
        const struct nvfx_src none = nvfx_src(nvfx_reg(NVFXSR_NONE, 0));
        struct nvfx_insn insn;
-       struct nvfx_src src[3], tmp;
+       struct nvfx_src src[3], tmp, tmp2;
        struct nvfx_reg dst;
        int mask, sat, unit = 0;
        int ai = -1, ci = -1, ii = -1;
@@ -721,6 +721,13 @@ nvfx_fragprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_fpc *fpc,
        case TGSI_OPCODE_SNE:
                nvfx_fp_emit(fpc, arith(sat, SNE, dst, mask, src[0], src[1], none));
                break;
+       case TGSI_OPCODE_SSG:
+               tmp = nvfx_src(temp(fpc));
+               tmp2 = nvfx_src(temp(fpc));
+               nvfx_fp_emit(fpc, arith(0, SGT, tmp.reg, mask, src[0], nvfx_src(nvfx_reg(NVFXSR_CONST, 0)), none));
+               nvfx_fp_emit(fpc, arith(0, SLT, tmp.reg, mask, src[0], nvfx_src(nvfx_reg(NVFXSR_CONST, 0)), none));
+               nvfx_fp_emit(fpc, arith(sat, ADD, dst, mask, tmp, neg(tmp2), none));
+               break;
        case TGSI_OPCODE_STR:
                nvfx_fp_emit(fpc, arith(sat, STR, dst, mask, src[0], src[1], none));
                break;
@@ -896,6 +903,8 @@ nvfx_fragprog_prepare(struct nvfx_context* nvfx, struct nvfx_fpc *fpc)
        struct tgsi_parse_context p;
        int high_temp = -1, i;
        struct util_semantic_set set;
+       float const0v[4] = {0, 0, 0, 0};
+       struct nvfx_reg const0;
 
        fpc->fp->num_slots = util_semantic_set_from_program_file(&set, fpc->fp->pipe.tokens, TGSI_FILE_INPUT);
        if(fpc->fp->num_slots > 8)
@@ -905,6 +914,9 @@ nvfx_fragprog_prepare(struct nvfx_context* nvfx, struct nvfx_fpc *fpc)
 
        memset(fpc->fp->slot_to_fp_input, 0xff, sizeof(fpc->fp->slot_to_fp_input));
 
+       const0 = constant(fpc, -1, const0v);
+       assert(const0.index == 0);
+
        tgsi_parse_init(&p, fpc->fp->pipe.tokens);
        while (!tgsi_parse_end_of_tokens(&p)) {
                const union tgsi_full_token *tok = &p.FullToken;