Andrew Carlotti <andrew.carlo...@arm.com> writes: > Updated patch to fix the fp16 intrinsic pragmas, and pushed to master. > OK to backport to GCC 13?
OK, thanks. Richard > Many intrinsics currently depend on both an architecture version and a > feature, despite the corresponding instructions being available within > GCC at lower architecture versions. > > LLVM has already removed these explicit architecture version > dependences; this patch does the same for GCC. Note that +fp16 does not > imply +simd, so we need to add an explicit +simd for the Neon fp16 > intrinsics. > > Binutils did not previously support all of these architecture+feature > combinations, but this problem is already reachable from GCC. For > example, compiling the test gcc.target/aarch64/usadv16qi-dotprod.c > with -O3 -march=armv8-a+dotprod has resulted in an assembler error since > GCC 10. This is fixed in Binutils 2.41. > > This patch retains explicit architecture version dependencies for > features that do not currently have a separate feature flag. > > gcc/ChangeLog: > > * config/aarch64/aarch64.h (TARGET_MEMTAG): Remove armv8.5 > dependency. > * config/aarch64/arm_acle.h: Remove unnecessary armv8.x > dependencies from target pragmas. > * config/aarch64/arm_fp16.h (target): Likewise. > * config/aarch64/arm_neon.h (target): Likewise. > > gcc/testsuite/ChangeLog: > > * gcc.target/aarch64/feature-bf16-backport.c: New test. > * gcc.target/aarch64/feature-dotprod-backport.c: New test. > * gcc.target/aarch64/feature-fp16-backport.c: New test. > * gcc.target/aarch64/feature-fp16-scalar-backport.c: New test. > * gcc.target/aarch64/feature-fp16fml-backport.c: New test. > * gcc.target/aarch64/feature-i8mm-backport.c: New test. > * gcc.target/aarch64/feature-memtag-backport.c: New test. > * gcc.target/aarch64/feature-sha3-backport.c: New test. > * gcc.target/aarch64/feature-sm4-backport.c: New test. > > --- > > diff --git a/gcc/config/aarch64/aarch64.h b/gcc/config/aarch64/aarch64.h > index > a01f1ee99d85917941ffba55bc3b4dcac87b41f6..2b0fc97bb71e9d560ae26035c7d7142682e46c38 > 100644 > --- a/gcc/config/aarch64/aarch64.h > +++ b/gcc/config/aarch64/aarch64.h > @@ -292,7 +292,7 @@ enum class aarch64_feature : unsigned char { > #define TARGET_RNG (AARCH64_ISA_RNG) > > /* Memory Tagging instructions optional to Armv8.5 enabled through +memtag. > */ > -#define TARGET_MEMTAG (AARCH64_ISA_V8_5A && AARCH64_ISA_MEMTAG) > +#define TARGET_MEMTAG (AARCH64_ISA_MEMTAG) > > /* I8MM instructions are enabled through +i8mm. */ > #define TARGET_I8MM (AARCH64_ISA_I8MM) > diff --git a/gcc/config/aarch64/arm_acle.h b/gcc/config/aarch64/arm_acle.h > index > 3b6b63e6805432b5f1686745f987c52d2967c7c1..7599a32301dadf80760d3cb40a8685d2e6a476fb > 100644 > --- a/gcc/config/aarch64/arm_acle.h > +++ b/gcc/config/aarch64/arm_acle.h > @@ -292,7 +292,7 @@ __rndrrs (uint64_t *__res) > #pragma GCC pop_options > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.5-a+memtag") > +#pragma GCC target ("+nothing+memtag") > > #define __arm_mte_create_random_tag(__ptr, __u64_mask) \ > __builtin_aarch64_memtag_irg(__ptr, __u64_mask) > diff --git a/gcc/config/aarch64/arm_fp16.h b/gcc/config/aarch64/arm_fp16.h > index > 350f8cc33d99e16137e9d70fa7958b10924dc67f..c10f9dcf7e097ded1740955addcd73348649dc56 > 100644 > --- a/gcc/config/aarch64/arm_fp16.h > +++ b/gcc/config/aarch64/arm_fp16.h > @@ -30,7 +30,7 @@ > #include <stdint.h> > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+fp16") > +#pragma GCC target ("+nothing+fp16") > > typedef __fp16 float16_t; > > diff --git a/gcc/config/aarch64/arm_neon.h b/gcc/config/aarch64/arm_neon.h > index > 0ace1eeddb97443433c091d2363403fcf2907654..349f3167699447eb397af482eaeadf8a07617025 > 100644 > --- a/gcc/config/aarch64/arm_neon.h > +++ b/gcc/config/aarch64/arm_neon.h > @@ -25590,7 +25590,7 @@ __INTERLEAVE_LIST (zip) > #include "arm_fp16.h" > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+fp16") > +#pragma GCC target ("+nothing+simd+fp16") > > /* ARMv8.2-A FP16 one operand vector intrinsics. */ > > @@ -26753,7 +26753,7 @@ vminnmvq_f16 (float16x8_t __a) > /* AdvSIMD Dot Product intrinsics. */ > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+dotprod") > +#pragma GCC target ("+nothing+dotprod") > > __extension__ extern __inline uint32x2_t > __attribute__ ((__always_inline__, __gnu_inline__, __artificial__)) > @@ -26844,7 +26844,7 @@ vdotq_laneq_s32 (int32x4_t __r, int8x16_t __a, > int8x16_t __b, const int __index) > #pragma GCC pop_options > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+sm4") > +#pragma GCC target ("+nothing+sm4") > > __extension__ extern __inline uint32x4_t > __attribute__ ((__always_inline__, __gnu_inline__, __artificial__)) > @@ -26911,7 +26911,7 @@ vsm4ekeyq_u32 (uint32x4_t __a, uint32x4_t __b) > #pragma GCC pop_options > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+sha3") > +#pragma GCC target ("+nothing+sha3") > > __extension__ extern __inline uint64x2_t > __attribute__ ((__always_inline__, __gnu_inline__, __artificial__)) > @@ -27547,7 +27547,7 @@ vcmlaq_rot270_laneq_f32 (float32x4_t __r, float32x4_t > __a, float32x4_t __b, > #pragma GCC pop_options > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+fp16fml") > +#pragma GCC target ("+nothing+fp16fml") > > __extension__ extern __inline float32x2_t > __attribute__ ((__always_inline__, __gnu_inline__, __artificial__)) > @@ -27856,7 +27856,7 @@ vrnd64xq_f64 (float64x2_t __a) > #include "arm_bf16.h" > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+bf16") > +#pragma GCC target ("+nothing+bf16") > > __extension__ extern __inline bfloat16x4_t > __attribute__ ((__always_inline__, __gnu_inline__, __artificial__)) > @@ -28535,7 +28535,7 @@ vst4q_lane_bf16 (bfloat16_t *__ptr, bfloat16x8x4_t > __val, const int __lane) > /* AdvSIMD 8-bit Integer Matrix Multiply (I8MM) intrinsics. */ > > #pragma GCC push_options > -#pragma GCC target ("arch=armv8.2-a+i8mm") > +#pragma GCC target ("+nothing+i8mm") > > __extension__ extern __inline int32x2_t > __attribute__ ((__always_inline__, __gnu_inline__, __artificial__)) > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-bf16-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-bf16-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..3a03255bbb9a3e3da45c9f2ecafaf12685278057 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-bf16-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+bf16" } */ > + > +#include <arm_neon.h> > + > +float32x4_t bar (float32x4_t r, bfloat16x8_t a, bfloat16x8_t b) { > + return vbfmlalbq_f32 (r, a, b); > +} > + > +/* { dg-final { scan-assembler {\tbfmlalb\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-dotprod-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-dotprod-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..5f66fffa5f5b09a9c04da7b861055e3aa89bccec > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-dotprod-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+dotprod" } */ > + > +#include <arm_neon.h> > + > +uint32x4_t bar (uint32x4_t r, uint8x16_t a, uint8x16_t b) { > + return vdotq_u32(r, a, b); > +} > + > +/* { dg-final { scan-assembler {\tudot\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-fp16-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-fp16-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..eb94ae060664eef4275023440c0a18b52ae27b42 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-fp16-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+fp16" } */ > + > +#include <arm_neon.h> > + > +float16x8_t bar (float16x8_t a, float16x8_t b) { > + return vaddq_f16(a, b); > +} > + > +/* { dg-final { scan-assembler {\tfadd\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-fp16-scalar-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-fp16-scalar-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..9cde6b5558c2e3699620d0d35ebc3e679fdfe5eb > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-fp16-scalar-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+fp16+nosimd" } */ > + > +#include <arm_fp16.h> > + > +float16_t bar (float16_t a, float16_t b) { > + return vaddh_f16(a, b); > +} > + > +/* { dg-final { scan-assembler {\tfadd\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-fp16fml-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-fp16fml-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..86c4748b86d9730d433cc206700d7789d996bb6d > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-fp16fml-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+fp16fml" } */ > + > +#include <arm_neon.h> > + > +float32x4_t bar (float32x4_t r, float16x8_t a, float16x8_t b) { > + return vfmlalq_high_f16 (r, a, b); > +} > + > +/* { dg-final { scan-assembler {\tfmlal2\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-i8mm-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-i8mm-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..6dd0214faab9d470a4f363252d48ac0de92bfe7b > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-i8mm-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+i8mm" } */ > + > +#include <arm_neon.h> > + > +int32x4_t bar (int32x4_t r, int8x16_t a, int8x16_t b) { > + return vmmlaq_s32 (r, a, b); > +} > + > +/* { dg-final { scan-assembler {\tsmmla\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-memtag-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-memtag-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..5cb071b77ccbd11039d4b8ee9e2cd78a708f2fad > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-memtag-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+memtag" } */ > + > +#include <arm_acle.h> > + > +int *bar (int *src) { > + return __arm_mte_create_random_tag(src, 2<<16-1); > +} > + > +/* { dg-final { scan-assembler {\tirg\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-sha3-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-sha3-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..e194f1a10ea12439195c8cf1aae08dae26607c14 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-sha3-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+sha3" } */ > + > +#include <arm_neon.h> > + > +uint64x2_t bar (uint64x2_t a, uint64x2_t b, uint64x2_t c) { > + return vsha512hq_u64(a, b, c); > +} > + > +/* { dg-final { scan-assembler {\tsha512h\t} } } */ > diff --git a/gcc/testsuite/gcc.target/aarch64/feature-sm4-backport.c > b/gcc/testsuite/gcc.target/aarch64/feature-sm4-backport.c > new file mode 100644 > index > 0000000000000000000000000000000000000000..604a58bcb68e5753d2eec661a374b4983ad29088 > --- /dev/null > +++ b/gcc/testsuite/gcc.target/aarch64/feature-sm4-backport.c > @@ -0,0 +1,10 @@ > +/* { dg-do compile } */ > +/* { dg-additional-options "-march=armv8-a+sm4" } */ > + > +#include <arm_neon.h> > + > +uint32x4_t bar (uint32x4_t a, uint32x4_t b, uint32x4_t c) { > + return vsm3tt1aq_u32(a, b, c, 2); > +} > + > +/* { dg-final { scan-assembler {\tsm3tt1a\t} } } */