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https://sourceware.org/git/glibc.git
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x86-64: Small improvements to dl-trampoline.S
1. Remove sse2 instructions when using the avx512 or avx version.
2. Fixup some format nits in how the address offsets where aligned.
3. Use more space efficient instructions in the conditional AVX
restoral.
- vpcmpeqq -> vpcmpeqb
- cmp imm32, r; jz -> inc r; jz
4. Use `rep movsb` instead of `rep movsq`. The former is guranteed to
be fast with the ERMS flags, the latter is not. The latter also
wastes an instruction in size setup.
This commit is contained in:
Noah Goldstein
parent
21925f6473
commit
58bcf7b71a
@ -57,22 +57,26 @@
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#define VMOVA vmovdqa64
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#define VEC(i) zmm##i
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#define _dl_runtime_profile _dl_runtime_profile_avx512
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# define SECTION(p) p##.evex512
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#include "dl-trampoline.h"
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#undef _dl_runtime_profile
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#undef VEC
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#undef VMOVA
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#undef VEC_SIZE
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#undef SECTION
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#if MINIMUM_X86_ISA_LEVEL <= AVX_X86_ISA_LEVEL
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# define VEC_SIZE 32
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# define VMOVA vmovdqa
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# define VEC(i) ymm##i
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# define SECTION(p) p##.avx
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# define _dl_runtime_profile _dl_runtime_profile_avx
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# include "dl-trampoline.h"
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# undef _dl_runtime_profile
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# undef VEC
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# undef VMOVA
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# undef VEC_SIZE
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# undef SECTION
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#endif
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#if MINIMUM_X86_ISA_LEVEL < AVX_X86_ISA_LEVEL
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@ -16,7 +16,11 @@
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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.text
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#ifndef SECTION
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# define SECTION(p) p
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#endif
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.section SECTION(.text),"ax",@progbits
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#ifdef _dl_runtime_resolve
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# undef REGISTER_SAVE_AREA
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@ -219,19 +223,19 @@ _dl_runtime_profile:
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/* We always store the XMM registers even if AVX is available.
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This is to provide backward binary compatibility for existing
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audit modules. */
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movaps %xmm0, (LR_XMM_OFFSET)(%rsp)
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movaps %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
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movaps %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
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movaps %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
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movaps %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
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movaps %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
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movaps %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
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movaps %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
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VMOVA %xmm0, (LR_XMM_OFFSET + XMM_SIZE*0)(%rsp)
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VMOVA %xmm1, (LR_XMM_OFFSET + XMM_SIZE*1)(%rsp)
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VMOVA %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
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VMOVA %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
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VMOVA %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
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VMOVA %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
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VMOVA %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
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VMOVA %xmm7, (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp)
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# ifdef RESTORE_AVX
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/* This is to support AVX audit modules. */
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VMOVA %VEC(0), (LR_VECTOR_OFFSET)(%rsp)
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VMOVA %VEC(1), (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp)
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VMOVA %VEC(0), (LR_VECTOR_OFFSET + VECTOR_SIZE*0)(%rsp)
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VMOVA %VEC(1), (LR_VECTOR_OFFSET + VECTOR_SIZE*1)(%rsp)
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VMOVA %VEC(2), (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp)
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VMOVA %VEC(3), (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp)
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VMOVA %VEC(4), (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp)
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@ -241,8 +245,8 @@ _dl_runtime_profile:
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/* Save xmm0-xmm7 registers to detect if any of them are
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changed by audit module. */
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vmovdqa %xmm0, (LR_SIZE)(%rsp)
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vmovdqa %xmm1, (LR_SIZE + XMM_SIZE)(%rsp)
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vmovdqa %xmm0, (LR_SIZE + XMM_SIZE*0)(%rsp)
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vmovdqa %xmm1, (LR_SIZE + XMM_SIZE*1)(%rsp)
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vmovdqa %xmm2, (LR_SIZE + XMM_SIZE*2)(%rsp)
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vmovdqa %xmm3, (LR_SIZE + XMM_SIZE*3)(%rsp)
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vmovdqa %xmm4, (LR_SIZE + XMM_SIZE*4)(%rsp)
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@ -265,84 +269,84 @@ _dl_runtime_profile:
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movq LR_R8_OFFSET(%rsp), %r8
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movq LR_R9_OFFSET(%rsp), %r9
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movaps (LR_XMM_OFFSET)(%rsp), %xmm0
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movaps (LR_XMM_OFFSET + XMM_SIZE)(%rsp), %xmm1
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movaps (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm2
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movaps (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm3
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movaps (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm4
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movaps (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm5
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movaps (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6
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movaps (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*0)(%rsp), %xmm0
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*1)(%rsp), %xmm1
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp), %xmm2
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp), %xmm3
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp), %xmm4
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp), %xmm5
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp), %xmm6
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VMOVA (LR_XMM_OFFSET + XMM_SIZE*7)(%rsp), %xmm7
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# ifdef RESTORE_AVX
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/* Check if any xmm0-xmm7 registers are changed by audit
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module. */
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vpcmpeqq (LR_SIZE)(%rsp), %xmm0, %xmm8
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vpcmpeqb (LR_SIZE)(%rsp), %xmm0, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm0, (LR_VECTOR_OFFSET)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET)(%rsp), %VEC(0)
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vmovdqa %xmm0, (LR_XMM_OFFSET)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm1, (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE)(%rsp), %VEC(1)
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vmovdqa %xmm1, (LR_XMM_OFFSET + XMM_SIZE)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE*2)(%rsp), %xmm2, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE*2)(%rsp), %xmm2, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm2, (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*2)(%rsp), %VEC(2)
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vmovdqa %xmm2, (LR_XMM_OFFSET + XMM_SIZE*2)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE*3)(%rsp), %xmm3, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE*3)(%rsp), %xmm3, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm3, (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*3)(%rsp), %VEC(3)
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vmovdqa %xmm3, (LR_XMM_OFFSET + XMM_SIZE*3)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE*4)(%rsp), %xmm4, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE*4)(%rsp), %xmm4, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm4, (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*4)(%rsp), %VEC(4)
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vmovdqa %xmm4, (LR_XMM_OFFSET + XMM_SIZE*4)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE*5)(%rsp), %xmm5, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE*5)(%rsp), %xmm5, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm5, (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*5)(%rsp), %VEC(5)
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vmovdqa %xmm5, (LR_XMM_OFFSET + XMM_SIZE*5)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE*6)(%rsp), %xmm6, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE*6)(%rsp), %xmm6, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm6, (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp)
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jmp 1f
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2: VMOVA (LR_VECTOR_OFFSET + VECTOR_SIZE*6)(%rsp), %VEC(6)
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vmovdqa %xmm6, (LR_XMM_OFFSET + XMM_SIZE*6)(%rsp)
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1: vpcmpeqq (LR_SIZE + XMM_SIZE*7)(%rsp), %xmm7, %xmm8
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1: vpcmpeqb (LR_SIZE + XMM_SIZE*7)(%rsp), %xmm7, %xmm8
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vpmovmskb %xmm8, %esi
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cmpl $0xffff, %esi
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incw %si
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je 2f
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vmovdqa %xmm7, (LR_VECTOR_OFFSET + VECTOR_SIZE*7)(%rsp)
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jmp 1f
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@ -352,8 +356,8 @@ _dl_runtime_profile:
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1:
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# endif
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mov 16(%rbx), %R10_LP # Anything in framesize?
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test %R10_LP, %R10_LP
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mov 16(%rbx), %RCX_LP # Anything in framesize?
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test %RCX_LP, %RCX_LP
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jns 3f
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/* There's nothing in the frame size, so there
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@ -385,14 +389,11 @@ _dl_runtime_profile:
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returned from _dl_profile_fixup */
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lea LR_RSP_OFFSET(%rbx), %RSI_LP # stack
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add $8, %R10_LP
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and $-16, %R10_LP
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mov %R10_LP, %RCX_LP
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sub %R10_LP, %RSP_LP
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add $8, %RCX_LP
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and $-16, %RCX_LP
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sub %RCX_LP, %RSP_LP
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mov %RSP_LP, %RDI_LP
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shr $3, %RCX_LP
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rep
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movsq
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rep movsb
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movq 24(%rdi), %rcx # Get back register content.
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movq 32(%rdi), %rsi
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@ -428,8 +429,8 @@ _dl_runtime_profile:
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movq %rax, LRV_RAX_OFFSET(%rcx)
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movq %rdx, LRV_RDX_OFFSET(%rcx)
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movaps %xmm0, LRV_XMM0_OFFSET(%rcx)
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movaps %xmm1, LRV_XMM1_OFFSET(%rcx)
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VMOVA %xmm0, LRV_XMM0_OFFSET(%rcx)
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VMOVA %xmm1, LRV_XMM1_OFFSET(%rcx)
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# ifdef RESTORE_AVX
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/* This is to support AVX audit modules. */
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@ -438,8 +439,8 @@ _dl_runtime_profile:
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/* Save xmm0/xmm1 registers to detect if they are changed
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by audit module. */
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vmovdqa %xmm0, (LRV_SIZE)(%rcx)
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vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE)(%rcx)
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vmovdqa %xmm0, (LRV_SIZE + XMM_SIZE*0)(%rcx)
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vmovdqa %xmm1, (LRV_SIZE + XMM_SIZE*1)(%rcx)
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# endif
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fstpt LRV_ST0_OFFSET(%rcx)
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@ -454,20 +455,20 @@ _dl_runtime_profile:
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movq LRV_RAX_OFFSET(%rsp), %rax
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movq LRV_RDX_OFFSET(%rsp), %rdx
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movaps LRV_XMM0_OFFSET(%rsp), %xmm0
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movaps LRV_XMM1_OFFSET(%rsp), %xmm1
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VMOVA LRV_XMM0_OFFSET(%rsp), %xmm0
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VMOVA LRV_XMM1_OFFSET(%rsp), %xmm1
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# ifdef RESTORE_AVX
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/* Check if xmm0/xmm1 registers are changed by audit module. */
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vpcmpeqq (LRV_SIZE)(%rsp), %xmm0, %xmm2
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vpcmpeqb (LRV_SIZE)(%rsp), %xmm0, %xmm2
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vpmovmskb %xmm2, %esi
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cmpl $0xffff, %esi
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incw %si
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jne 1f
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VMOVA LRV_VECTOR0_OFFSET(%rsp), %VEC(0)
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1: vpcmpeqq (LRV_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm2
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1: vpcmpeqb (LRV_SIZE + XMM_SIZE)(%rsp), %xmm1, %xmm2
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vpmovmskb %xmm2, %esi
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cmpl $0xffff, %esi
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incw %si
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jne 1f
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VMOVA LRV_VECTOR1_OFFSET(%rsp), %VEC(1)
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