From: Dave Airlie <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
---
src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c | 28 +++--------------------
1 file changed, 3 insertions(+), 25 deletions(-)
diff --git a/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c
b/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c
index 085fd5b..879deb1 100644
--- a/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c
+++ b/src/gallium/drivers/radeonsi/si_shader_tgsi_alu.c
@@ -586,32 +586,10 @@ static void emit_imsb(const struct lp_build_tgsi_action
*action,
struct lp_build_tgsi_context *bld_base,
struct lp_build_emit_data *emit_data)
{
- struct gallivm_state *gallivm = bld_base->base.gallivm;
- LLVMBuilderRef builder = gallivm->builder;
- LLVMValueRef arg = emit_data->args[0];
-
- LLVMValueRef msb =
- lp_build_intrinsic(builder, "llvm.AMDGPU.flbit.i32",
- emit_data->dst_type, &arg, 1,
- LP_FUNC_ATTR_READNONE);
-
- /* The HW returns the last bit index from MSB, but TGSI wants
- * the index from LSB. Invert it by doing "31 - msb". */
- msb = LLVMBuildSub(builder, lp_build_const_int32(gallivm, 31),
- msb, "");
-
- /* If arg == 0 || arg == -1 (0xffffffff), return -1. */
- LLVMValueRef all_ones = lp_build_const_int32(gallivm, -1);
-
- LLVMValueRef cond =
- LLVMBuildOr(builder,
- LLVMBuildICmp(builder, LLVMIntEQ, arg,
- bld_base->uint_bld.zero, ""),
- LLVMBuildICmp(builder, LLVMIntEQ, arg,
- all_ones, ""), "");
-
+ struct si_shader_context *ctx = si_shader_context(bld_base);
emit_data->output[emit_data->chan] =
- LLVMBuildSelect(builder, cond, all_ones, msb, "");
+ ac_emit_imsb(&ctx->ac, emit_data->args[0],
+ emit_data->dst_type);
}
static void emit_iabs(const struct lp_build_tgsi_action *action,
--
2.7.4
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