diff options
| author | Dave Airlie <[email protected]> | 2015-07-16 04:38:41 +0100 |
|---|---|---|
| committer | Dave Airlie <[email protected]> | 2015-07-25 01:06:41 +0100 |
| commit | 730e8c4410d73bf9db2c1768af8cf6e98e24cc73 (patch) | |
| tree | 6d592f4783ecdc6addcf582f2b1ad2f3e8b25303 /src/gallium | |
| parent | b42444ffed87114e82522dd81d3e5540c21a128c (diff) | |
radeonsi: separate out load sample position
This is prep work for reusing this in the interpolation
code later.
Reviewed-by: Marek Olšák <[email protected]>
Signed-off-by: Dave Airlie <[email protected]>
Diffstat (limited to 'src/gallium')
| -rw-r--r-- | src/gallium/drivers/radeonsi/si_shader.c | 44 |
1 files changed, 26 insertions, 18 deletions
diff --git a/src/gallium/drivers/radeonsi/si_shader.c b/src/gallium/drivers/radeonsi/si_shader.c index cddd9a0e120..77ba9c9e0a1 100644 --- a/src/gallium/drivers/radeonsi/si_shader.c +++ b/src/gallium/drivers/radeonsi/si_shader.c @@ -1030,6 +1030,31 @@ static LLVMValueRef buffer_load_const(LLVMBuilderRef builder, LLVMValueRef resou LLVMReadNoneAttribute | LLVMNoUnwindAttribute); } +static LLVMValueRef load_sample_position(struct radeon_llvm_context *radeon_bld, LLVMValueRef sample_id) +{ + struct si_shader_context *si_shader_ctx = + si_shader_context(&radeon_bld->soa.bld_base); + struct lp_build_context *uint_bld = &radeon_bld->soa.bld_base.uint_bld; + struct gallivm_state *gallivm = &radeon_bld->gallivm; + LLVMBuilderRef builder = gallivm->builder; + LLVMValueRef desc = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, SI_PARAM_CONST); + LLVMValueRef buf_index = lp_build_const_int32(gallivm, SI_DRIVER_STATE_CONST_BUF); + LLVMValueRef resource = build_indexed_load_const(si_shader_ctx, desc, buf_index); + + /* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */ + LLVMValueRef offset0 = lp_build_mul_imm(uint_bld, sample_id, 8); + LLVMValueRef offset1 = LLVMBuildAdd(builder, offset0, lp_build_const_int32(gallivm, 4), ""); + + LLVMValueRef pos[4] = { + buffer_load_const(builder, resource, offset0, radeon_bld->soa.bld_base.base.elem_type), + buffer_load_const(builder, resource, offset1, radeon_bld->soa.bld_base.base.elem_type), + lp_build_const_float(gallivm, 0), + lp_build_const_float(gallivm, 0) + }; + + return lp_build_gather_values(gallivm, pos, 4); +} + static void declare_system_value( struct radeon_llvm_context * radeon_bld, unsigned index, @@ -1081,25 +1106,8 @@ static void declare_system_value( break; case TGSI_SEMANTIC_SAMPLEPOS: - { - LLVMBuilderRef builder = gallivm->builder; - LLVMValueRef desc = LLVMGetParam(si_shader_ctx->radeon_bld.main_fn, SI_PARAM_CONST); - LLVMValueRef buf_index = lp_build_const_int32(gallivm, SI_DRIVER_STATE_CONST_BUF); - LLVMValueRef resource = build_indexed_load_const(si_shader_ctx, desc, buf_index); - - /* offset = sample_id * 8 (8 = 2 floats containing samplepos.xy) */ - LLVMValueRef offset0 = lp_build_mul_imm(uint_bld, get_sample_id(radeon_bld), 8); - LLVMValueRef offset1 = LLVMBuildAdd(builder, offset0, lp_build_const_int32(gallivm, 4), ""); - - LLVMValueRef pos[4] = { - buffer_load_const(builder, resource, offset0, radeon_bld->soa.bld_base.base.elem_type), - buffer_load_const(builder, resource, offset1, radeon_bld->soa.bld_base.base.elem_type), - lp_build_const_float(gallivm, 0), - lp_build_const_float(gallivm, 0) - }; - value = lp_build_gather_values(gallivm, pos, 4); + value = load_sample_position(radeon_bld, get_sample_id(radeon_bld)); break; - } case TGSI_SEMANTIC_SAMPLEMASK: /* Smoothing isn't MSAA in GL, but it's MSAA in hardware. |