diff options
| author | Michal Krol <[email protected]> | 2010-08-27 13:24:47 +0200 |
|---|---|---|
| committer | José Fonseca <[email protected]> | 2010-08-30 13:01:58 +0100 |
| commit | 1bb97610e969918015f46efe6fe32c6c71a8293a (patch) | |
| tree | f2805ddf7934b30179acb95eb04f664c096e5cb3 /src/gallium/drivers/svga | |
| parent | 5a70db643295e99ca3f821a34abe474d56a6c872 (diff) | |
svga: Fix CMP translation for vertex shader targets.
SVGA3DOP_CMP is not supported for vertex shaders;
use SLT + LRP instead.
Diffstat (limited to 'src/gallium/drivers/svga')
| -rw-r--r-- | src/gallium/drivers/svga/svga_tgsi_insn.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/src/gallium/drivers/svga/svga_tgsi_insn.c b/src/gallium/drivers/svga/svga_tgsi_insn.c index 67e1f22a701..72dccdf1502 100644 --- a/src/gallium/drivers/svga/svga_tgsi_insn.c +++ b/src/gallium/drivers/svga/svga_tgsi_insn.c @@ -806,6 +806,20 @@ static boolean emit_cmp(struct svga_shader_emitter *emit, const struct src_register src2 = translate_src_register( emit, &insn->Src[2] ); + if (emit->unit == PIPE_SHADER_VERTEX) { + SVGA3dShaderDestToken temp = get_temp(emit); + struct src_register zero = scalar(get_zero_immediate(emit), TGSI_SWIZZLE_X); + + /* Since vertex shaders don't support the CMP instruction, + * simulate it with SLT and LRP instructions. + * SLT TMP, SRC0, 0.0 + * LRP DST, TMP, SRC1, SRC2 + */ + if (!submit_op2(emit, inst_token(SVGA3DOP_SLT), temp, src0, zero)) + return FALSE; + return submit_op3(emit, inst_token(SVGA3DOP_LRP), dst, src(temp), src1, src2); + } + /* CMP DST, SRC0, SRC2, SRC1 */ return submit_op3( emit, inst_token( SVGA3DOP_CMP ), dst, src0, src2, src1); } @@ -2682,6 +2696,11 @@ needs_to_create_zero( struct svga_shader_emitter *emit ) return TRUE; } + if (emit->unit == PIPE_SHADER_VERTEX) { + if (emit->info.opcode_count[TGSI_OPCODE_CMP] >= 1) + return TRUE; + } + if (emit->info.opcode_count[TGSI_OPCODE_IF] >= 1 || emit->info.opcode_count[TGSI_OPCODE_BGNLOOP] >= 1 || emit->info.opcode_count[TGSI_OPCODE_DDX] >= 1 || |