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tgsi: Parse source register extended swizzle.

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This commit is contained in:
Michal Krol 2008-07-20 21:58:07 +02:00
parent 9d068d4b90
commit b3c8d0c348
1 changed files with 63 additions and 26 deletions
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89
src/gallium/auxiliary/tgsi/util/tgsi_text.c
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@ -496,6 +496,52 @@ parse_dst_operand(
return TRUE;
}
static boolean
parse_optional_swizzle(
struct translate_ctx *ctx,
uint swizzle[4],
boolean *parsed_swizzle,
boolean *parsed_extswizzle )
{
const char *cur = ctx->cur;
*parsed_swizzle = FALSE;
*parsed_extswizzle = FALSE;
eat_opt_white( &cur );
if (*cur == '.') {
uint i;
cur++;
eat_opt_white( &cur );
for (i = 0; i < 4; i++) {
if (toupper( *cur ) == 'X')
swizzle[i] = TGSI_SWIZZLE_X;
else if (toupper( *cur ) == 'Y')
swizzle[i] = TGSI_SWIZZLE_Y;
else if (toupper( *cur ) == 'Z')
swizzle[i] = TGSI_SWIZZLE_Z;
else if (toupper( *cur ) == 'W')
swizzle[i] = TGSI_SWIZZLE_W;
else {
if (*cur == '0')
swizzle[i] = TGSI_EXTSWIZZLE_ZERO;
else if (*cur == '1')
swizzle[i] = TGSI_EXTSWIZZLE_ONE;
else {
report_error( ctx, "Expected register swizzle component `x', `y', `z', `w', `0' or `1'" );
return FALSE;
}
*parsed_extswizzle = TRUE;
}
cur++;
}
*parsed_swizzle = TRUE;
ctx->cur = cur;
}
return TRUE;
}
static boolean
parse_src_operand(
struct translate_ctx *ctx,
@ -507,6 +553,9 @@ parse_src_operand(
int index;
uint ind_file;
int ind_index;
uint swizzle[4];
boolean parsed_swizzle;
boolean parsed_extswizzle;
if (*ctx->cur == '-') {
cur = ctx->cur;
@ -588,35 +637,23 @@ parse_src_operand(
src->SrcRegisterInd.Index = ind_index;
}
/* Parse optional swizzle
/* Parse optional swizzle.
*/
cur = ctx->cur;
eat_opt_white( &cur );
if (*cur == '.') {
uint i;
if (parse_optional_swizzle( ctx, swizzle, &parsed_swizzle, &parsed_extswizzle )) {
if (parsed_extswizzle) {
assert( parsed_swizzle );
cur++;
eat_opt_white( &cur );
for (i = 0; i < 4; i++) {
uint swizzle;
if (toupper( *cur ) == 'X')
swizzle = TGSI_SWIZZLE_X;
else if (toupper( *cur ) == 'Y')
swizzle = TGSI_SWIZZLE_Y;
else if (toupper( *cur ) == 'Z')
swizzle = TGSI_SWIZZLE_Z;
else if (toupper( *cur ) == 'W')
swizzle = TGSI_SWIZZLE_W;
else {
report_error( ctx, "Expected register swizzle component either `x', `y', `z' or `w'" );
return FALSE;
}
cur++;
tgsi_util_set_src_register_swizzle( &src->SrcRegister, swizzle, i );
src->SrcRegisterExtSwz.ExtSwizzleX = swizzle[0];
src->SrcRegisterExtSwz.ExtSwizzleY = swizzle[1];
src->SrcRegisterExtSwz.ExtSwizzleZ = swizzle[2];
src->SrcRegisterExtSwz.ExtSwizzleW = swizzle[3];
}
else if (parsed_swizzle) {
src->SrcRegister.SwizzleX = swizzle[0];
src->SrcRegister.SwizzleY = swizzle[1];
src->SrcRegister.SwizzleZ = swizzle[2];
src->SrcRegister.SwizzleW = swizzle[3];
}
ctx->cur = cur;
}
if (src->SrcRegisterExtMod.Complement) {