diff options
Diffstat (limited to 'src/gallium/drivers')
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_arit.c | 25 | ||||
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_bld_arit.h | 20 |
2 files changed, 45 insertions, 0 deletions
diff --git a/src/gallium/drivers/llvmpipe/lp_bld_arit.c b/src/gallium/drivers/llvmpipe/lp_bld_arit.c index eb9e579bdda..a1d8a89774d 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_arit.c +++ b/src/gallium/drivers/llvmpipe/lp_bld_arit.c @@ -502,6 +502,31 @@ lp_build_div(struct lp_build_context *bld, } +LLVMValueRef +lp_build_lerp(struct lp_build_context *bld, + LLVMValueRef x, + LLVMValueRef v0, + LLVMValueRef v1) +{ + return lp_build_add(bld, v0, lp_build_mul(bld, x, lp_build_sub(bld, v1, v0))); +} + + +LLVMValueRef +lp_build_lerp_2d(struct lp_build_context *bld, + LLVMValueRef x, + LLVMValueRef y, + LLVMValueRef v00, + LLVMValueRef v01, + LLVMValueRef v10, + LLVMValueRef v11) +{ + LLVMValueRef v0 = lp_build_lerp(bld, x, v00, v01); + LLVMValueRef v1 = lp_build_lerp(bld, x, v10, v11); + return lp_build_lerp(bld, y, v0, v1); +} + + /** * Generate min(a, b) * Do checks for special cases. diff --git a/src/gallium/drivers/llvmpipe/lp_bld_arit.h b/src/gallium/drivers/llvmpipe/lp_bld_arit.h index 0732b9fa753..383c3c3313b 100644 --- a/src/gallium/drivers/llvmpipe/lp_bld_arit.h +++ b/src/gallium/drivers/llvmpipe/lp_bld_arit.h @@ -72,6 +72,26 @@ lp_build_div(struct lp_build_context *bld, LLVMValueRef b); LLVMValueRef +lp_build_lerp(struct lp_build_context *bld, + LLVMValueRef x, + LLVMValueRef v0, + LLVMValueRef v1); + +/** + * Bilinear interpolation. + * + * Values indices are in v_{yx}. + */ +LLVMValueRef +lp_build_lerp_2d(struct lp_build_context *bld, + LLVMValueRef x, + LLVMValueRef y, + LLVMValueRef v00, + LLVMValueRef v01, + LLVMValueRef v10, + LLVMValueRef v11); + +LLVMValueRef lp_build_min(struct lp_build_context *bld, LLVMValueRef a, LLVMValueRef b); |