ReceiveTempSMS
/
Sweden-Number
1
0
Fork 0
Code Issues Pull Requests Releases Wiki Activity

wined3d: Take care against overwriting a source register in cmp.

This commit is contained in:
Stefan Dösinger 2007-09-09 16:54:51 +02:00 committed by Alexandre Julliard
parent 9c6cdda147
commit 6dc11616d5
1 changed files with 37 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

41
dlls/wined3d/glsl_shader.c
View File

@ -1513,6 +1513,17 @@ void shader_glsl_cmp(SHADER_OPCODE_ARG* arg) {
glsl_src_param_t src2_param;
DWORD write_mask, cmp_channel = 0;
unsigned int i, j;
char mask_char[6];
BOOL temp_destination = FALSE;
DWORD src0reg = arg->src[0] & WINED3DSP_REGNUM_MASK;
DWORD src1reg = arg->src[1] & WINED3DSP_REGNUM_MASK;
DWORD src2reg = arg->src[2] & WINED3DSP_REGNUM_MASK;
DWORD src0regtype = shader_get_regtype(arg->src[0]);
DWORD src1regtype = shader_get_regtype(arg->src[1]);
DWORD src2regtype = shader_get_regtype(arg->src[2]);
DWORD dstreg = arg->dst & WINED3DSP_REGNUM_MASK;
DWORD dstregtype = shader_get_regtype(arg->dst);
/* Cycle through all source0 channels */
for (i=0; i<4; i++) {
@ -1524,16 +1535,38 @@ void shader_glsl_cmp(SHADER_OPCODE_ARG* arg) {
cmp_channel = WINED3DSP_WRITEMASK_0 << j;
}
}
write_mask = shader_glsl_append_dst_ext(arg->buffer, arg, arg->dst & (~WINED3DSP_SWIZZLE_MASK | write_mask));
if (!write_mask) continue;
/* Splitting the cmp instruction up in multiple lines imposes a problem:
* The first lines may overwrite source parameters of the following lines.
* Deal with that by using a temporary destination register if needed
*/
if((src0reg == dstreg && src0regtype == dstregtype) ||
(src1reg == dstreg && src1regtype == dstregtype) ||
(src2reg == dstreg && src2regtype == dstregtype)) {
write_mask = shader_glsl_get_write_mask(arg->dst & (~WINED3DSP_SWIZZLE_MASK | write_mask), mask_char);
if (!write_mask) continue;
shader_addline(arg->buffer, "tmp0%s = (", mask_char);
temp_destination = TRUE;
} else {
write_mask = shader_glsl_append_dst_ext(arg->buffer, arg, arg->dst & (~WINED3DSP_SWIZZLE_MASK | write_mask));
if (!write_mask) continue;
}
shader_glsl_add_src_param(arg, arg->src[0], arg->src_addr[0], cmp_channel, &src0_param);
shader_glsl_add_src_param(arg, arg->src[1], arg->src_addr[1], write_mask, &src1_param);
shader_glsl_add_src_param(arg, arg->src[2], arg->src_addr[2], write_mask, &src2_param);
shader_addline(arg->buffer, "%s >= 0.0 ? %s : %s);\n",
src0_param.param_str, src1_param.param_str, src2_param.param_str);
shader_addline(arg->buffer, "%s >= 0.0 ? %s : %s);\n",
src0_param.param_str, src1_param.param_str, src2_param.param_str);
}
if(temp_destination) {
shader_glsl_get_write_mask(arg->dst, mask_char);
shader_glsl_append_dst_ext(arg->buffer, arg, arg->dst);
shader_addline(arg->buffer, "tmp0%s);\n", mask_char);
}
}
/** Process the CND opcode in GLSL (dst = (src0 > 0.5) ? src1 : src2) */