diff options
| author | José Fonseca <[email protected]> | 2011-10-16 01:42:57 +0100 |
|---|---|---|
| committer | José Fonseca <[email protected]> | 2011-10-16 14:18:41 +0100 |
| commit | e9c1d87ce73eb3da829d5124cc5f4716d79e8973 (patch) | |
| tree | 966eafd2779237cc281d23d3bd8307838fb0770d | |
| parent | 1350882e4950bc957e60e68a685b8fea08693e13 (diff) | |
llvmpipe: Use lp_build_ifloor_fract for exp2 calculation.
Instead of separate ifloor / fract calls.
No change for SSE4.1 code, but less FP<->SI conversions on non SSE4.1
systems.
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_arit.c | 6 | ||||
| -rw-r--r-- | src/gallium/drivers/llvmpipe/lp_test_arit.c | 10 |
2 files changed, 11 insertions, 5 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_arit.c b/src/gallium/auxiliary/gallivm/lp_bld_arit.c index 2be8598704e..a15dcb085f5 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_arit.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_arit.c @@ -2255,7 +2255,6 @@ lp_build_exp2_approx(struct lp_build_context *bld, LLVMBuilderRef builder = bld->gallivm->builder; const struct lp_type type = bld->type; LLVMTypeRef vec_type = lp_build_vec_type(bld->gallivm, type); - LLVMTypeRef int_vec_type = lp_build_int_vec_type(bld->gallivm, type); LLVMValueRef ipart = NULL; LLVMValueRef fpart = NULL; LLVMValueRef expipart = NULL; @@ -2278,15 +2277,12 @@ lp_build_exp2_approx(struct lp_build_context *bld, x = lp_build_max(bld, x, lp_build_const_vec(bld->gallivm, type, -126.99999)); /* ipart = floor(x) */ - ipart = lp_build_floor(bld, x); - /* fpart = x - ipart */ - fpart = LLVMBuildFSub(builder, x, ipart, ""); + lp_build_ifloor_fract(bld, x, &ipart, &fpart); } if(p_exp2_int_part || p_exp2) { /* expipart = (float) (1 << ipart) */ - ipart = LLVMBuildFPToSI(builder, ipart, int_vec_type, ""); expipart = LLVMBuildAdd(builder, ipart, lp_build_const_int_vec(bld->gallivm, type, 127), ""); expipart = LLVMBuildShl(builder, expipart, diff --git a/src/gallium/drivers/llvmpipe/lp_test_arit.c b/src/gallium/drivers/llvmpipe/lp_test_arit.c index ea2a659142f..0b74dee176f 100644 --- a/src/gallium/drivers/llvmpipe/lp_test_arit.c +++ b/src/gallium/drivers/llvmpipe/lp_test_arit.c @@ -91,6 +91,10 @@ const float exp2_values[] = { -1e-007, 0, 1e-007, + 0.01, + 0.1, + 0.9, + 0.99, 1, 2, 4, @@ -107,8 +111,14 @@ const float log2_values[] = { 1.4012984643248171e-45, #endif 1e-007, + 0.1, 0.5, + 0.99, 1, + 1.01, + 1.1, + 1.9, + 1.99, 2, 4, 100000, |