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path: root/src/gallium/drivers/nvfx/nvfx_vertprog.c
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Diffstat (limited to 'src/gallium/drivers/nvfx/nvfx_vertprog.c')
-rw-r--r--src/gallium/drivers/nvfx/nvfx_vertprog.c13
1 files changed, 13 insertions, 0 deletions
diff --git a/src/gallium/drivers/nvfx/nvfx_vertprog.c b/src/gallium/drivers/nvfx/nvfx_vertprog.c
index 2894532bd19..d68224ce7a2 100644
--- a/src/gallium/drivers/nvfx/nvfx_vertprog.c
+++ b/src/gallium/drivers/nvfx/nvfx_vertprog.c
@@ -614,6 +614,19 @@ nvfx_vertprog_parse_instruction(struct nvfx_context* nvfx, struct nvfx_vpc *vpc,
case TGSI_OPCODE_SUB:
nvfx_vp_emit(vpc, arith(VEC, ADD, dst, mask, src[0], none, neg(src[1])));
break;
+ case TGSI_OPCODE_TRUNC:
+ tmp = nvfx_src(temp(vpc));
+ insn = arith(VEC, MOV, none.reg, mask, src[0], none, none);
+ insn.cc_update = 1;
+ nvfx_vp_emit(vpc, insn);
+
+ nvfx_vp_emit(vpc, arith(VEC, FLR, tmp.reg, mask, abs(src[0]), none, none));
+ nvfx_vp_emit(vpc, arith(VEC, MOV, dst, mask, tmp, none, none));
+
+ insn = arith(VEC, MOV, dst, mask, neg(tmp), none, none);
+ insn.cc_test = NVFX_COND_LT;
+ nvfx_vp_emit(vpc, insn);
+ break;
case TGSI_OPCODE_XPD:
tmp = nvfx_src(temp(vpc));
nvfx_vp_emit(vpc, arith(VEC, MUL, tmp.reg, mask, swz(src[0], Z, X, Y, Y), swz(src[1], Y, Z, X, X), none));