diff options
| author | Brian Paul <[email protected]> | 2010-03-04 10:50:26 -0700 |
|---|---|---|
| committer | Brian Paul <[email protected]> | 2010-03-04 10:53:27 -0700 |
| commit | 516bad2272aa9bb3c85516e0023ddd2ed236dcef (patch) | |
| tree | 74ec872cad6dfe5fe976d5bbb0941dff90a42355 | |
| parent | 6464d81e779e8c05ef96c9e5dab4422ff1f25464 (diff) | |
gallivm: added lp_build_fract()
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_arit.c | 13 | ||||
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_arit.h | 4 |
2 files changed, 17 insertions, 0 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.c b/src/gallium/auxiliary/gallivm/lp_bld_arit.c index 42ae9f6a22c..32f9e5201c5 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_arit.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.c @@ -900,6 +900,19 @@ lp_build_ceil(struct lp_build_context *bld, /** + * Return fractional part of 'a' computed as a - floor(f) + * Typically used in texture coord arithmetic. + */ +LLVMValueRef +lp_build_fract(struct lp_build_context *bld, + LLVMValueRef a) +{ + assert(bld->type.floating); + return lp_build_sub(bld, a, lp_build_floor(bld, a)); +} + + +/** * Convert to integer, through whichever rounding method that's fastest, * typically truncating toward zero. */ diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.h b/src/gallium/auxiliary/gallivm/lp_bld_arit.h index 866349d8cba..55385e3a66a 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_arit.h +++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.h @@ -149,6 +149,10 @@ lp_build_trunc(struct lp_build_context *bld, LLVMValueRef a); LLVMValueRef +lp_build_fract(struct lp_build_context *bld, + LLVMValueRef a); + +LLVMValueRef lp_build_ifloor(struct lp_build_context *bld, LLVMValueRef a); LLVMValueRef |