ac: add ac_build_frexp_mant() helper and 16-bit/32-bit support

Signed-off-by: Samuel Pitoiset <samuel.pitoiset@gmail.com>
Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/common/ac_llvm_build.c b/src/amd/common/ac_llvm_build.c
index 04d4b37..4fd1d14 100644 (file)
--- a/src/amd/common/ac_llvm_build.c
+++ b/src/amd/common/ac_llvm_build.c
@@ -3926,3 +3926,28 @@ ac_build_shuffle(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef ind
                  AC_FUNC_ATTR_READNONE |
                  AC_FUNC_ATTR_CONVERGENT);
 }
+
+LLVMValueRef
+ac_build_frexp_mant(struct ac_llvm_context *ctx, LLVMValueRef src0,
+                   unsigned bitsize)
+{
+       LLVMTypeRef type;
+       char *intr;
+
+       if (bitsize == 16) {
+               intr = "llvm.amdgcn.frexp.mant.f16";
+               type = ctx->f16;
+       } else if (bitsize == 32) {
+               intr = "llvm.amdgcn.frexp.mant.f32";
+               type = ctx->f32;
+       } else {
+               intr = "llvm.amdgcn.frexp.mant.f64";
+               type = ctx->f64;
+       }
+
+       LLVMValueRef params[] = {
+               src0,
+       };
+       return ac_build_intrinsic(ctx, intr, type, params, 1,
+                                 AC_FUNC_ATTR_READNONE);
+}

diff --git a/src/amd/common/ac_llvm_build.h b/src/amd/common/ac_llvm_build.h
index 14c1c56..db20b39 100644 (file)
--- a/src/amd/common/ac_llvm_build.h
+++ b/src/amd/common/ac_llvm_build.h
@@ -677,6 +677,10 @@ ac_build_quad_swizzle(struct ac_llvm_context *ctx, LLVMValueRef src,
 LLVMValueRef
 ac_build_shuffle(struct ac_llvm_context *ctx, LLVMValueRef src, LLVMValueRef index);
 
+LLVMValueRef
+ac_build_frexp_mant(struct ac_llvm_context *ctx, LLVMValueRef src0,
+                   unsigned bitsize);
+
 #ifdef __cplusplus
 }
 #endif

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index f16be5c..936d1ee 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -809,8 +809,8 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
                break;
        case nir_op_frexp_sig:
                src[0] = ac_to_float(&ctx->ac, src[0]);
-               result = ac_build_intrinsic(&ctx->ac, "llvm.amdgcn.frexp.mant.f64",
-                                           ctx->ac.f64, src, 1, AC_FUNC_ATTR_READNONE);
+               result = ac_build_frexp_mant(&ctx->ac, src[0],
+                                            instr->dest.dest.ssa.bit_size);
                break;
        case nir_op_fpow:
                result = emit_intrin_2f_param(&ctx->ac, "llvm.pow",