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-rw-r--r--src/gallium/drivers/svga/svga_tgsi_insn.c17
1 files changed, 15 insertions, 2 deletions
diff --git a/src/gallium/drivers/svga/svga_tgsi_insn.c b/src/gallium/drivers/svga/svga_tgsi_insn.c
index 5f262b3ead..97d9104642 100644
--- a/src/gallium/drivers/svga/svga_tgsi_insn.c
+++ b/src/gallium/drivers/svga/svga_tgsi_insn.c
@@ -746,7 +746,7 @@ static boolean emit_fake_arl(struct svga_shader_emitter *emit,
static boolean emit_if(struct svga_shader_emitter *emit,
const struct tgsi_full_instruction *insn)
{
- const struct src_register src = translate_src_register(
+ struct src_register src0 = translate_src_register(
emit, &insn->Src[0] );
struct src_register zero = get_zero_immediate( emit );
SVGA3dShaderInstToken if_token = inst_token( SVGA3DOP_IFC );
@@ -754,10 +754,23 @@ static boolean emit_if(struct svga_shader_emitter *emit,
if_token.control = SVGA3DOPCOMPC_NE;
zero = scalar(zero, TGSI_SWIZZLE_X);
+ if (SVGA3dShaderGetRegType(src0.base.value) == SVGA3DREG_CONST) {
+ /*
+ * Max different constant registers readable per IFC instruction is 1.
+ */
+
+ SVGA3dShaderDestToken tmp = get_temp( emit );
+
+ if (!submit_op1(emit, inst_token( SVGA3DOP_MOV ), tmp, src0))
+ return FALSE;
+
+ src0 = scalar(src( tmp ), TGSI_SWIZZLE_X);
+ }
+
emit->dynamic_branching_level++;
return (emit_instruction( emit, if_token ) &&
- emit_src( emit, src ) &&
+ emit_src( emit, src0 ) &&
emit_src( emit, zero ) );
}