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author | Brian Paul <brianp@vmware.com> | 2010-06-10 22:48:16 -0600 |
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committer | Brian Paul <brianp@vmware.com> | 2010-06-10 22:48:16 -0600 |
commit | f1c5043f94261fecd8a6e54fe37d786554affcdd (patch) | |
tree | 681dcd7ddafb3535629df2b3ccdaf693d1cfd5df /src/mesa/slang/slang_label.c | |
parent | 7936e06657bc43de80ae4f56ee9db956e193d880 (diff) | |
download | external_mesa3d-f1c5043f94261fecd8a6e54fe37d786554affcdd.zip external_mesa3d-f1c5043f94261fecd8a6e54fe37d786554affcdd.tar.gz external_mesa3d-f1c5043f94261fecd8a6e54fe37d786554affcdd.tar.bz2 |
mesa: move shader/slang/* sources to main/slang/*
Reduce the source tree depth a bit.
Diffstat (limited to 'src/mesa/slang/slang_label.c')
-rw-r--r-- | src/mesa/slang/slang_label.c | 104 |
1 files changed, 104 insertions, 0 deletions
diff --git a/src/mesa/slang/slang_label.c b/src/mesa/slang/slang_label.c new file mode 100644 index 0000000..8e3a8eb --- /dev/null +++ b/src/mesa/slang/slang_label.c @@ -0,0 +1,104 @@ + + +/** + * Functions for managing instruction labels. + * Basically, this is used to manage the problem of forward branches where + * we have a branch instruciton but don't know the target address yet. + */ + + +#include "slang_label.h" +#include "slang_mem.h" + + + +slang_label * +_slang_label_new(const char *name) +{ + slang_label *l = (slang_label *) _slang_alloc(sizeof(slang_label)); + if (l) { + l->Name = _slang_strdup(name); + l->Location = -1; + } + return l; +} + +/** + * As above, but suffix the name with a unique number. + */ +slang_label * +_slang_label_new_unique(const char *name) +{ + static int id = 1; + slang_label *l = (slang_label *) _slang_alloc(sizeof(slang_label)); + if (l) { + l->Name = (char *) _slang_alloc(strlen(name) + 10); + if (!l->Name) { + free(l); + return NULL; + } + _mesa_snprintf(l->Name, strlen(name) + 10, "%s_%d", name, id); + id++; + l->Location = -1; + } + return l; +} + +void +_slang_label_delete(slang_label *l) +{ + if (l->Name) { + _slang_free(l->Name); + l->Name = NULL; + } + if (l->References) { + _slang_free(l->References); + l->References = NULL; + } + _slang_free(l); +} + + +void +_slang_label_add_reference(slang_label *l, GLuint inst) +{ + const GLuint oldSize = l->NumReferences * sizeof(GLuint); + assert(l->Location < 0); + l->References = _slang_realloc(l->References, + oldSize, oldSize + sizeof(GLuint)); + if (l->References) { + l->References[l->NumReferences] = inst; + l->NumReferences++; + } +} + + +GLint +_slang_label_get_location(const slang_label *l) +{ + return l->Location; +} + + +void +_slang_label_set_location(slang_label *l, GLint location, + struct gl_program *prog) +{ + GLuint i; + + assert(l->Location < 0); + assert(location >= 0); + + l->Location = location; + + /* for the instructions that were waiting to learn the label's location: */ + for (i = 0; i < l->NumReferences; i++) { + const GLuint j = l->References[i]; + prog->Instructions[j].BranchTarget = location; + } + + if (l->References) { + _slang_free(l->References); + l->References = NULL; + } +} |