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path: root/src/gallium/auxiliary/draw/draw_aapoint.c
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Diffstat (limited to 'src/gallium/auxiliary/draw/draw_aapoint.c')
-rw-r--r--src/gallium/auxiliary/draw/draw_aapoint.c202
1 files changed, 99 insertions, 103 deletions
diff --git a/src/gallium/auxiliary/draw/draw_aapoint.c b/src/gallium/auxiliary/draw/draw_aapoint.c
index 43119cc70b4..cae6fcd4d2b 100644
--- a/src/gallium/auxiliary/draw/draw_aapoint.c
+++ b/src/gallium/auxiliary/draw/draw_aapoint.c
@@ -222,7 +222,7 @@ aa_transform_inst(struct tgsi_transform_context *ctx,
*
* Temp reg0 usage:
* t0.x = distance of fragment from center point
- * t0.y = boolean, is t0.x > 1 ?
+ * t0.y = boolean, is t0.x > 1.0, also misc temp usage
* t0.z = temporary for computing 1/(1-k) value
* t0.w = final coverage value
*/
@@ -313,9 +313,73 @@ aa_transform_inst(struct tgsi_transform_context *ctx,
newInst.FullSrcRegisters[0].SrcRegister.Negate = 1;
ctx->emit_instruction(ctx, &newInst);
- /* SGT t0.y, t0.x, tex.z; # bool b = distance > k */
+
+ /* compute coverage factor = (1-d)/(1-k) */
+
+ /* SUB t0.z, tex.w, tex.z; # m = 1 - k */
newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_SGT;
+ newInst.Instruction.Opcode = TGSI_OPCODE_SUB;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
+ newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_Z;
+ newInst.Instruction.NumSrcRegs = 2;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = texInput;
+ newInst.FullSrcRegisters[0].SrcRegister.SwizzleZ = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_INPUT;
+ newInst.FullSrcRegisters[1].SrcRegister.Index = texInput;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleZ = TGSI_SWIZZLE_Z;
+ ctx->emit_instruction(ctx, &newInst);
+
+ /* RCP t0.z, t0.z; # t0.z = 1 / m */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_RCP;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
+ newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_Z;
+ newInst.Instruction.NumSrcRegs = 1;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = tmp0;
+ newInst.FullSrcRegisters[0].SrcRegister.SwizzleX = TGSI_SWIZZLE_Z;
+ ctx->emit_instruction(ctx, &newInst);
+
+ /* SUB t0.y, 1, t0.x; # d = 1 - d */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_SUB;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
+ newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_Y;
+ newInst.Instruction.NumSrcRegs = 2;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = texInput;
+ newInst.FullSrcRegisters[0].SrcRegister.SwizzleY = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[1].SrcRegister.Index = tmp0;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleY = TGSI_SWIZZLE_X;
+ ctx->emit_instruction(ctx, &newInst);
+
+ /* MUL t0.w, t0.y, t0.z; # coverage = d * m */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_MUL;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
+ newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_W;
+ newInst.Instruction.NumSrcRegs = 2;
+ newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[0].SrcRegister.Index = tmp0;
+ newInst.FullSrcRegisters[0].SrcRegister.SwizzleW = TGSI_SWIZZLE_Y;
+ newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[1].SrcRegister.Index = tmp0;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleW = TGSI_SWIZZLE_Z;
+ ctx->emit_instruction(ctx, &newInst);
+
+ /* SLE t0.y, t0.x, tex.z; # bool b = distance <= k */
+ newInst = tgsi_default_full_instruction();
+ newInst.Instruction.Opcode = TGSI_OPCODE_SLE;
newInst.Instruction.NumDstRegs = 1;
newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
@@ -329,111 +393,40 @@ aa_transform_inst(struct tgsi_transform_context *ctx,
newInst.FullSrcRegisters[1].SrcRegister.SwizzleY = TGSI_SWIZZLE_Z;
ctx->emit_instruction(ctx, &newInst);
- /* IF t0.y # if b then */
+ /* CMP t0.w, -t0.y, tex.w, t0.w;
+ * # if -t0.y < 0 then
+ * t0.w = 1
+ * else
+ * t0.w = t0.w
+ */
newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_IF;
- newInst.Instruction.NumDstRegs = 0;
- newInst.Instruction.NumSrcRegs = 1;
+ newInst.Instruction.Opcode = TGSI_OPCODE_CMP;
+ newInst.Instruction.NumDstRegs = 1;
+ newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
+ newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_W;
+ newInst.Instruction.NumSrcRegs = 3;
newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
newInst.FullSrcRegisters[0].SrcRegister.Index = tmp0;
newInst.FullSrcRegisters[0].SrcRegister.SwizzleX = TGSI_SWIZZLE_Y;
newInst.FullSrcRegisters[0].SrcRegister.SwizzleY = TGSI_SWIZZLE_Y;
newInst.FullSrcRegisters[0].SrcRegister.SwizzleZ = TGSI_SWIZZLE_Y;
newInst.FullSrcRegisters[0].SrcRegister.SwizzleW = TGSI_SWIZZLE_Y;
+ newInst.FullSrcRegisters[0].SrcRegister.Negate = 1;
+ newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_INPUT;
+ newInst.FullSrcRegisters[1].SrcRegister.Index = texInput;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleX = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleY = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleZ = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[1].SrcRegister.SwizzleW = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[2].SrcRegister.File = TGSI_FILE_TEMPORARY;
+ newInst.FullSrcRegisters[2].SrcRegister.Index = tmp0;
+ newInst.FullSrcRegisters[2].SrcRegister.SwizzleX = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[2].SrcRegister.SwizzleY = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[2].SrcRegister.SwizzleZ = TGSI_SWIZZLE_W;
+ newInst.FullSrcRegisters[2].SrcRegister.SwizzleW = TGSI_SWIZZLE_W;
ctx->emit_instruction(ctx, &newInst);
- {
- /* compute coverage factor = (1-d)/(1-k) */
-
- /* SUB t0.z, tex.w, tex.z; # m = 1 - k */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_SUB;
- newInst.Instruction.NumDstRegs = 1;
- newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
- newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_Z;
- newInst.Instruction.NumSrcRegs = 2;
- newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
- newInst.FullSrcRegisters[0].SrcRegister.Index = texInput;
- newInst.FullSrcRegisters[0].SrcRegister.SwizzleZ = TGSI_SWIZZLE_W;
- newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_INPUT;
- newInst.FullSrcRegisters[1].SrcRegister.Index = texInput;
- newInst.FullSrcRegisters[1].SrcRegister.SwizzleZ = TGSI_SWIZZLE_Z;
- ctx->emit_instruction(ctx, &newInst);
-
- /* RCP t0.z, t0.z; # t0.z = 1 / m */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_RCP;
- newInst.Instruction.NumDstRegs = 1;
- newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
- newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_Z;
- newInst.Instruction.NumSrcRegs = 1;
- newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullSrcRegisters[0].SrcRegister.Index = tmp0;
- newInst.FullSrcRegisters[0].SrcRegister.SwizzleX = TGSI_SWIZZLE_Z;
- ctx->emit_instruction(ctx, &newInst);
-
- /* SUB t0.x, 1, t0.x; # d = 1 - d */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_SUB;
- newInst.Instruction.NumDstRegs = 1;
- newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
- newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_X;
- newInst.Instruction.NumSrcRegs = 2;
- newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
- newInst.FullSrcRegisters[0].SrcRegister.Index = texInput;
- newInst.FullSrcRegisters[0].SrcRegister.SwizzleX = TGSI_SWIZZLE_W;
- newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullSrcRegisters[1].SrcRegister.Index = tmp0;
- newInst.FullSrcRegisters[1].SrcRegister.SwizzleX = TGSI_SWIZZLE_X;
- ctx->emit_instruction(ctx, &newInst);
-
- /* MUL t0.w, t0.x, t0.z; # coverage = d * m */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_MUL;
- newInst.Instruction.NumDstRegs = 1;
- newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
- newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_W;
- newInst.Instruction.NumSrcRegs = 2;
- newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullSrcRegisters[0].SrcRegister.Index = tmp0;
- newInst.FullSrcRegisters[0].SrcRegister.SwizzleW = TGSI_SWIZZLE_X;
- newInst.FullSrcRegisters[1].SrcRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullSrcRegisters[1].SrcRegister.Index = tmp0;
- newInst.FullSrcRegisters[1].SrcRegister.SwizzleW = TGSI_SWIZZLE_Z;
- ctx->emit_instruction(ctx, &newInst);
- }
-
- /* ELSE */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_ELSE;
- newInst.Instruction.NumDstRegs = 0;
- newInst.Instruction.NumSrcRegs = 0;
- ctx->emit_instruction(ctx, &newInst);
-
- {
- /* MOV t0.w, tex.w; # coverage = 1.0 */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_MOV;
- newInst.Instruction.NumDstRegs = 1;
- newInst.FullDstRegisters[0].DstRegister.File = TGSI_FILE_TEMPORARY;
- newInst.FullDstRegisters[0].DstRegister.Index = tmp0;
- newInst.FullDstRegisters[0].DstRegister.WriteMask = TGSI_WRITEMASK_W;
- newInst.Instruction.NumSrcRegs = 1;
- newInst.FullSrcRegisters[0].SrcRegister.File = TGSI_FILE_INPUT;
- newInst.FullSrcRegisters[0].SrcRegister.Index = texInput;
- ctx->emit_instruction(ctx, &newInst);
- }
-
- /* ENDIF */
- newInst = tgsi_default_full_instruction();
- newInst.Instruction.Opcode = TGSI_OPCODE_ENDIF;
- newInst.Instruction.NumDstRegs = 0;
- newInst.Instruction.NumSrcRegs = 0;
- ctx->emit_instruction(ctx, &newInst);
}
if (inst->Instruction.Opcode == TGSI_OPCODE_END) {
@@ -516,7 +509,7 @@ generate_aapoint_fs(struct aapoint_stage *aapoint)
(struct tgsi_token *) aapoint_fs.tokens,
MAX, &transform.base);
-#if 0 /* DEBUG */
+#if 1 /* DEBUG */
tgsi_dump(orig_fs->tokens, 0);
tgsi_dump(aapoint_fs.tokens, 0);
#endif
@@ -613,13 +606,16 @@ aapoint_point(struct draw_stage *stage, struct prim_header *header)
* ELSE
* coverage = 1.0; // full coverage
* ENDIF
+ *
+ * Note: the ELSEIF and ELSE clauses are actually implemented with CMP to
+ * avoid using IF/ELSE/ENDIF TGSI opcodes.
*/
#if !NORMALIZE
- k = 1.0 / radius;
- k = 1.0 - 2.0 * k + k * k;
+ k = 1.0f / radius;
+ k = 1.0f - 2.0f * k + k * k;
#else
- k = 1.0 - 1.0 / radius;
+ k = 1.0f - 1.0f / radius;
#endif
/* allocate/dup new verts */
generated by cgit v1.2.3 (git 2.39.1) at 2024-12-22 07:02:30 +0000