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gallivm: added aligned pointer get/set

This commit is contained in:
James Benton 2012-04-19 13:13:17 +01:00 committed by José Fonseca
parent 630fa26886
commit 85d09d1c61
4 changed files with 81 additions and 0 deletions
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7
src/gallium/auxiliary/gallivm/lp_bld_init.h
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@ -81,5 +81,12 @@ extern LLVMValueRef
lp_build_load_volatile(LLVMBuilderRef B, LLVMValueRef PointerVal,
const char *Name);
void
lp_set_load_alignment(LLVMValueRef Inst,
unsigned Align);
void
lp_set_store_alignment(LLVMValueRef Inst,
unsigned Align);
#endif /* !LP_BLD_INIT_H */

15
src/gallium/auxiliary/gallivm/lp_bld_misc.cpp
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@ -165,3 +165,18 @@ lp_build_load_volatile(LLVMBuilderRef B, LLVMValueRef PointerVal,
return llvm::wrap(llvm::unwrap(B)->CreateLoad(llvm::unwrap(PointerVal), true, Name));
}
extern "C"
void
lp_set_load_alignment(LLVMValueRef Inst,
unsigned Align)
{
llvm::unwrap<llvm::LoadInst>(Inst)->setAlignment(Align);
}
extern "C"
void
lp_set_store_alignment(LLVMValueRef Inst,
unsigned Align)
{
llvm::unwrap<llvm::StoreInst>(Inst)->setAlignment(Align);
}

34
src/gallium/auxiliary/gallivm/lp_bld_struct.c
View File

@ -146,6 +146,25 @@ lp_build_pointer_get(LLVMBuilderRef builder,
}
LLVMValueRef
lp_build_pointer_get_unaligned(LLVMBuilderRef builder,
LLVMValueRef ptr,
LLVMValueRef index,
unsigned alignment)
{
LLVMValueRef element_ptr;
LLVMValueRef res;
assert(LLVMGetTypeKind(LLVMTypeOf(ptr)) == LLVMPointerTypeKind);
element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
res = LLVMBuildLoad(builder, element_ptr, "");
lp_set_load_alignment(res, alignment);
#ifdef DEBUG
lp_build_name(res, "%s[%s]", LLVMGetValueName(ptr), LLVMGetValueName(index));
#endif
return res;
}
void
lp_build_pointer_set(LLVMBuilderRef builder,
LLVMValueRef ptr,
@ -156,3 +175,18 @@ lp_build_pointer_set(LLVMBuilderRef builder,
element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
LLVMBuildStore(builder, value, element_ptr);
}
void
lp_build_pointer_set_unaligned(LLVMBuilderRef builder,
LLVMValueRef ptr,
LLVMValueRef index,
LLVMValueRef value,
unsigned alignment)
{
LLVMValueRef element_ptr;
LLVMValueRef instr;
element_ptr = LLVMBuildGEP(builder, ptr, &index, 1, "");
instr = LLVMBuildStore(builder, value, element_ptr);
lp_set_store_alignment(instr, alignment);
}

25
src/gallium/auxiliary/gallivm/lp_bld_struct.h
View File

@ -104,6 +104,18 @@ lp_build_pointer_get(LLVMBuilderRef builder,
LLVMValueRef ptr,
LLVMValueRef index);
/**
* Get the value of an array element, with explicit alignment.
*
* If the element size is different from the alignment this will
* cause llvm to emit an unaligned load
*/
LLVMValueRef
lp_build_pointer_get_unaligned(LLVMBuilderRef builder,
LLVMValueRef ptr,
LLVMValueRef index,
unsigned alignment);
/**
* Set the value of an array element.
*/
@ -113,4 +125,17 @@ lp_build_pointer_set(LLVMBuilderRef builder,
LLVMValueRef index,
LLVMValueRef value);
/**
* Set the value of an array element, with explicit alignment.
*
* If the element size is different from the alignment this will
* cause llvm to emit an unaligned store
*/
void
lp_build_pointer_set_unaligned(LLVMBuilderRef builder,
LLVMValueRef ptr,
LLVMValueRef index,
LLVMValueRef value,
unsigned alignment);
#endif /* !LP_BLD_STRUCT_H */