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wined3d: Use DP2A or X2D for dp2add if available.

This commit is contained in:
Stefan Dösinger 2009-05-28 17:27:54 +02:00 committed by Alexandre Julliard
parent e2be741bc0
commit da7176be2a
1 changed files with 40 additions and 8 deletions
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48
dlls/wined3d/arb_program_shader.c
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@ -1020,19 +1020,51 @@ static void pshader_hw_dp2add(const struct wined3d_shader_instruction *ins)
SHADER_BUFFER *buffer = ins->ctx->buffer;
char dst_name[50];
char src_name[3][50];
struct shader_arb_ctx_priv *ctx = ins->ctx->backend_data;
shader_arb_get_dst_param(ins, dst, dst_name);
shader_arb_get_src_param(ins, &ins->src[0], 0, src_name[0]);
shader_arb_get_src_param(ins, &ins->src[1], 1, src_name[1]);
shader_arb_get_src_param(ins, &ins->src[2], 2, src_name[2]);
/* Emulate a DP2 with a DP3 and 0.0. Don't use the dest as temp register, it could be src[1] or src[2]
* src_name[0] can be TA, but TA is a private temp for modifiers, so it is save to overwrite
*/
shader_addline(buffer, "MOV TA, %s;\n", src_name[0]);
shader_addline(buffer, "MOV TA.z, 0.0;\n");
shader_addline(buffer, "DP3 TA, TA, %s;\n", src_name[1]);
shader_addline(buffer, "ADD%s %s, TA, %s;\n", shader_arb_get_modifier(ins), dst_name, src_name[2]);
if(ctx->target_version >= NV3)
{
/* GL_NV_fragment_program2 has a 1:1 matching instruction */
shader_arb_get_src_param(ins, &ins->src[1], 1, src_name[1]);
shader_addline(buffer, "DP2A%s %s, %s, %s, %s;\n", shader_arb_get_modifier(ins),
dst_name, src_name[0], src_name[1], src_name[2]);
}
else if(ctx->target_version >= NV2)
{
/* dst.x = src2.?, src0.x, src1.x + src0.y * src1.y
* dst.y = src2.?, src0.x, src1.z + src0.y * src1.w
* dst.z = src2.?, src0.x, src1.x + src0.y * src1.y
* dst.z = src2.?, src0.x, src1.z + src0.y * src1.w
*
* Make sure that src1.zw = src1.xy, then we get a classic dp2add
*
* .xyxy and other swizzles that we could get with this are not valid in
* plain ARBfp, but luckily the NV extension grammar lifts this limitation.
*/
struct wined3d_shader_src_param tmp_param = ins->src[1];
DWORD swizzle = tmp_param.swizzle & 0xf; /* Selects .xy */
tmp_param.swizzle = swizzle | (swizzle << 4); /* Creates .xyxy */
shader_arb_get_src_param(ins, &tmp_param, 1, src_name[1]);
shader_addline(buffer, "X2D%s %s, %s, %s, %s;\n", shader_arb_get_modifier(ins),
dst_name, src_name[2], src_name[0], src_name[1]);
}
else
{
shader_arb_get_src_param(ins, &ins->src[1], 1, src_name[1]);
/* Emulate a DP2 with a DP3 and 0.0. Don't use the dest as temp register, it could be src[1] or src[2]
* src_name[0] can be TA, but TA is a private temp for modifiers, so it is save to overwrite
*/
shader_addline(buffer, "MOV TA, %s;\n", src_name[0]);
shader_addline(buffer, "MOV TA.z, 0.0;\n");
shader_addline(buffer, "DP3 TA, TA, %s;\n", src_name[1]);
shader_addline(buffer, "ADD%s %s, TA, %s;\n", shader_arb_get_modifier(ins), dst_name, src_name[2]);
}
}
/* Map the opcode 1-to-1 to the GL code */