added simple half math ops

Change-Id: I10b1d1023a9e5f2ba63f28c4a2bbe60ee49a8aee

src/hip_ir.ll

@@ -34,9 +34,24 @@ define linkonce_odr spir_func i32 @__rocm_hadd(i32 %in1, i32 %in2) {
   ret i32 %val
 }
 
-define linkonce_odr spir_func half @__hip_hadd_clang40_gfx803(half %a, half %b) {
+define linkonce_odr spir_func half @__hip_hadd_gfx803(half %a, half %b) #1 {
   %val = tail call half asm "v_add_f16 $0, $1, $2","=v,v,v"(half %a, half %b)
   ret half %val
 }
 
+define linkonce_odr spir_func half @__hip_hfma_gfx803(half %a, half %b, half %c) #1 {
+  %val = tail call half asm "v_fma_f16 $0, $1, $2, $3","=v,v,v,v"(half %a, half %b, half %c)
+  ret half %val
+}
+
+define linkonce_odr spir_func half @__hip_hmul_gfx803(half %a, half %b) #1 {
+  %val = tail call half asm "v_mul_f16 $0, $1, $2","=v,v,v"(half %a, half %b)
+  ret half %val
+}
+
+define linkonce_odr spir_func half @__hip_hsub_gfx803(half %a, half %b) #1 {
+  %val = tail call half asm "v_sub_f16 $0, $1, $2","=v,v,v"(half %a, half %b)
+  ret half %val
+}
+
 attributes #1 = { alwaysinline nounwind }