ac: add doubles support to isign

Fixes a number of int64 piglit tests, for example:

generated_tests/spec/arb_gpu_shader_int64/execution/built-in-functions/fs-sign-i64vec2.shader_test

Reviewed-by: Bas Nieuwenhuizen <bas@basnieuwenhuizen.nl>

diff --git a/src/amd/common/ac_nir_to_llvm.c b/src/amd/common/ac_nir_to_llvm.c
index 0a0b577..6467ed6 100644 (file)
--- a/src/amd/common/ac_nir_to_llvm.c
+++ b/src/amd/common/ac_nir_to_llvm.c
@@ -1362,14 +1362,25 @@ static LLVMValueRef emit_fsign(struct ac_llvm_context *ctx,
 }
 
 static LLVMValueRef emit_isign(struct ac_llvm_context *ctx,
-                              LLVMValueRef src0)
+                              LLVMValueRef src0, unsigned bitsize)
 {
-       LLVMValueRef cmp, val;
+       LLVMValueRef cmp, val, zero, one;
+       LLVMTypeRef type;
+
+       if (bitsize == 32) {
+               type = ctx->i32;
+               zero = ctx->i32_0;
+               one = ctx->i32_1;
+       } else {
+               type = ctx->i64;
+               zero = ctx->i64_0;
+               one = ctx->i64_1;
+       }
 
-       cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGT, src0, ctx->i32_0, "");
-       val = LLVMBuildSelect(ctx->builder, cmp, ctx->i32_1, src0, "");
-       cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGE, val, ctx->i32_0, "");
-       val = LLVMBuildSelect(ctx->builder, cmp, val, LLVMConstInt(ctx->i32, -1, true), "");
+       cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGT, src0, zero, "");
+       val = LLVMBuildSelect(ctx->builder, cmp, one, src0, "");
+       cmp = LLVMBuildICmp(ctx->builder, LLVMIntSGE, val, zero, "");
+       val = LLVMBuildSelect(ctx->builder, cmp, val, LLVMConstInt(type, -1, true), "");
        return val;
 }
 
@@ -1813,7 +1824,7 @@ static void visit_alu(struct ac_nir_context *ctx, const nir_alu_instr *instr)
                result = emit_minmax_int(&ctx->ac, LLVMIntULT, src[0], src[1]);
                break;
        case nir_op_isign:
-               result = emit_isign(&ctx->ac, src[0]);
+               result = emit_isign(&ctx->ac, src[0], instr->dest.dest.ssa.bit_size);
                break;
        case nir_op_fsign:
                src[0] = ac_to_float(&ctx->ac, src[0]);