Remove 64-bit GaloisLFSR implementation from BiFModule

Drop the remaining 64-bit GaloisLFSR scalar and vector
implementations (long, long4) and declarations (long, long4,
long8) from the BiFModule headers and implementation.

Author: fda0

IGC/BiFModule/Headers/spirv.h

@@ -4169,7 +4169,6 @@ float16 __attribute__((overloadable)) __spirv_RoundFToTF32INTEL(float16 x);
 char __attribute__((overloadable))  __spirv_GaloisLFSRINTEL(char seed, char polynomial);
 short __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(short seed, short polynomial);
 int __attribute__((overloadable))   __spirv_GaloisLFSRINTEL(int seed, int polynomial);
-long __attribute__((overloadable))  __spirv_GaloisLFSRINTEL(long seed, long polynomial);
 // lfsr vec2
 char2 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(char2 seed, char polynomial);
 short2 __attribute__((overloadable))
@@ -4185,13 +4184,11 @@ char4 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(char4 seed, char pol
 short4 __attribute__((overloadable))
                                    __spirv_GaloisLFSRINTEL(short4 seed, short polynomial);
 int4 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(int4 seed, int polynomial);
-long4 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(long4 seed, long polynomial);
 // lfsr vec8
 char8 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(char8 seed, char polynomial);
 short8 __attribute__((overloadable))
                                    __spirv_GaloisLFSRINTEL(short8 seed, short polynomial);
 int8 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(int8 seed, int polynomial);
-long8 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(long8 seed, long polynomial);
 
 #if (__OPENCL_C_VERSION__ >= CL_VERSION_2_0)
 private

IGC/BiFModule/Implementation/conversions.cl

@@ -3542,12 +3542,6 @@ short __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(short seed, short po
 int __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(int seed, int polynomial) {
     return __builtin_IB_lfsr_b32(seed, polynomial);
 }
-long __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(long seed, long polynomial) {
-    // unsigned long is needed for *zero extended* shift right
-    ulong seed_r1 = as_ulong(seed) >> 1ul;
-    if (seed & 1) seed_r1 ^= as_ulong(polynomial);
-    return as_long(seed_r1);
-}
 // lfsr vec2
 char2 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(char2 seed, char polynomial) {
     char2 poly = {polynomial, polynomial};
@@ -3609,14 +3603,6 @@ int4 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(int4 seed, int polyno
     result.w = __builtin_IB_lfsr_b32(as_uint(seed.w), as_uint(polynomial));
     return as_int4(result);
 }
-long4 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(long4 seed, long polynomial) {
-    long4 result;
-    result.x = __spirv_GaloisLFSRINTEL(seed.x, polynomial);
-    result.y = __spirv_GaloisLFSRINTEL(seed.y, polynomial);
-    result.z = __spirv_GaloisLFSRINTEL(seed.z, polynomial);
-    result.w = __spirv_GaloisLFSRINTEL(seed.w, polynomial);
-    return result;
-}
 // lfsr vec8
 char8 __attribute__((overloadable)) __spirv_GaloisLFSRINTEL(char8 seed, char polynomial) {
     char4 poly = {polynomial, polynomial, polynomial, polynomial};