diff options
Diffstat (limited to 'src/gallium/auxiliary/gallivm')
| -rw-r--r-- | src/gallium/auxiliary/gallivm/lp_bld_logic.c | 32 |
1 files changed, 26 insertions, 6 deletions
diff --git a/src/gallium/auxiliary/gallivm/lp_bld_logic.c b/src/gallium/auxiliary/gallivm/lp_bld_logic.c index 7c585fda78..fa65895367 100644 --- a/src/gallium/auxiliary/gallivm/lp_bld_logic.c +++ b/src/gallium/auxiliary/gallivm/lp_bld_logic.c @@ -42,6 +42,26 @@ #include "lp_bld_logic.h" +/* + * XXX + * + * Selection with vector conditional like + * + * select <4 x i1> %C, %A, %B + * + * is valid IR (e.g. llvm/test/Assembler/vector-select.ll), but it is not + * supported on any backend. + * + * Expanding the boolean vector to full SIMD register width, as in + * + * sext <4 x i1> %C to <4 x i32> + * + * is valid and supported (e.g., llvm/test/CodeGen/X86/vec_compare.ll), but + * it causes assertion failures in LLVM 2.6. It appears to work correctly on + * LLVM 2.7. + */ + + /** * Build code to compare two values 'a' and 'b' of 'type' using the given func. * \param func one of PIPE_FUNC_x @@ -74,6 +94,7 @@ lp_build_compare(LLVMBuilderRef builder, /* XXX: It is not clear if we should use the ordered or unordered operators */ +#if !defined(HAVE_LLVM) || HAVE_LLVM < 0x0207 #if defined(PIPE_ARCH_X86) || defined(PIPE_ARCH_X86_64) if(type.width * type.length == 128) { if(type.floating && util_cpu_caps.has_sse) { @@ -200,6 +221,7 @@ lp_build_compare(LLVMBuilderRef builder, } } /* if (type.width * type.length == 128) */ #endif +#endif /* HAVE_LLVM < 0x0207 */ if(type.floating) { LLVMRealPredicate op; @@ -233,10 +255,9 @@ lp_build_compare(LLVMBuilderRef builder, return lp_build_undef(type); } -#if 0 - /* XXX: Although valid IR, no LLVM target currently support this */ +#if HAVE_LLVM >= 0x0207 cond = LLVMBuildFCmp(builder, op, a, b, ""); - res = LLVMBuildSelect(builder, cond, ones, zeros, ""); + res = LLVMBuildSExt(builder, cond, int_vec_type, ""); #else res = LLVMGetUndef(int_vec_type); if (type.length == 1) { @@ -286,10 +307,9 @@ lp_build_compare(LLVMBuilderRef builder, return lp_build_undef(type); } -#if 0 - /* XXX: Although valid IR, no LLVM target currently support this */ +#if HAVE_LLVM >= 0x0207 cond = LLVMBuildICmp(builder, op, a, b, ""); - res = LLVMBuildSelect(builder, cond, ones, zeros, ""); + res = LLVMBuildSExt(builder, cond, int_vec_type, ""); #else res = LLVMGetUndef(int_vec_type); if (type.length == 1) { |