[edk2-devel] [PATCH V2 1/3] CryptoPkg: Add instrinsics to support building ECC on IA32 windows
yi1 li
yi1.li at intel.com
Wed Apr 13 07:02:00 UTC 2022
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3679
This dependency is needed to build openssl lib with ECC ciphers
under IA32 Windows and adds implementation for _allmul and _allshr
instrinsics.
It is taken from Project Mu:
microsoft/mu_basecore at b55b341
Cc: Jiewen Yao <jiewen.yao at intel.com>
Cc: Jian J Wang <jian.j.wang at intel.com>
Signed-off-by: yi1 li <yi1.li at intel.com>
---
.../Library/IntrinsicLib/Ia32/MathLlmul.asm | 98 +++++++++++++++++++
.../Library/IntrinsicLib/Ia32/MathLlshr.asm | 78 +++++++++++++++
.../Library/IntrinsicLib/IntrinsicLib.inf | 2 +
3 files changed, 178 insertions(+)
create mode 100644 CryptoPkg/Library/IntrinsicLib/Ia32/MathLlmul.asm
create mode 100644 CryptoPkg/Library/IntrinsicLib/Ia32/MathLlshr.asm
diff --git a/CryptoPkg/Library/IntrinsicLib/Ia32/MathLlmul.asm b/CryptoPkg/Library/IntrinsicLib/Ia32/MathLlmul.asm
new file mode 100644
index 000000000000..341ea8a7bc0d
--- /dev/null
+++ b/CryptoPkg/Library/IntrinsicLib/Ia32/MathLlmul.asm
@@ -0,0 +1,98 @@
+;***
+;llmul.asm - long multiply routine
+;
+; Copyright (c) Microsoft Corporation. All rights reserved.
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;Purpose:
+; Defines long multiply routine
+; Both signed and unsigned routines are the same, since multiply's
+; work out the same in 2's complement
+; creates the following routine:
+; __allmul
+;
+;Original Implemenation: MSVC 14.12.25827
+;
+;*******************************************************************************
+ .686
+ .model flat,C
+ .code
+
+
+;***
+;llmul - long multiply routine
+;
+;Purpose:
+; Does a long multiply (same for signed/unsigned)
+; Parameters are not changed.
+;
+;Entry:
+; Parameters are passed on the stack:
+; 1st pushed: multiplier (QWORD)
+; 2nd pushed: multiplicand (QWORD)
+;
+;Exit:
+; EDX:EAX - product of multiplier and multiplicand
+; NOTE: parameters are removed from the stack
+;
+;Uses:
+; ECX
+;
+;Exceptions:
+;
+;*******************************************************************************
+_allmul PROC NEAR
+
+A EQU [esp + 4] ; stack address of a
+B EQU [esp + 12] ; stack address of b
+
+HIGH_PART EQU [4] ;
+LOW_PART EQU [0]
+
+;
+; AHI, BHI : upper 32 bits of A and B
+; ALO, BLO : lower 32 bits of A and B
+;
+; ALO * BLO
+; ALO * BHI
+; + BLO * AHI
+; ---------------------
+;
+
+ mov eax,HIGH_PART(A)
+ mov ecx,HIGH_PART(B)
+ or ecx,eax ;test for both high dwords zero.
+ mov ecx,LOW_PART(B)
+ jnz short hard ;both are zero, just mult ALO and BLO
+
+ mov eax,LOW_PART(A)
+ mul ecx
+
+ ret 16 ; callee restores the stack
+
+hard:
+ push ebx
+
+; must redefine A and B since esp has been altered
+
+A2 EQU [esp + 8] ; stack address of a
+B2 EQU [esp + 16] ; stack address of b
+
+ mul ecx ;eax has AHI, ecx has BLO, so AHI * BLO
+ mov ebx,eax ;save result
+
+ mov eax,LOW_PART(A2)
+ mul dword ptr HIGH_PART(B2) ;ALO * BHI
+ add ebx,eax ;ebx = ((ALO * BHI) + (AHI * BLO))
+
+ mov eax,LOW_PART(A2);ecx = BLO
+ mul ecx ;so edx:eax = ALO*BLO
+ add edx,ebx ;now edx has all the LO*HI stuff
+
+ pop ebx
+
+ ret 16 ; callee restores the stack
+
+_allmul ENDP
+
+ end
diff --git a/CryptoPkg/Library/IntrinsicLib/Ia32/MathLlshr.asm b/CryptoPkg/Library/IntrinsicLib/Ia32/MathLlshr.asm
new file mode 100644
index 000000000000..ab8294580f16
--- /dev/null
+++ b/CryptoPkg/Library/IntrinsicLib/Ia32/MathLlshr.asm
@@ -0,0 +1,78 @@
+;***
+;llshr.asm - long shift right
+;
+; Copyright (c) Microsoft Corporation. All rights reserved.
+; SPDX-License-Identifier: BSD-2-Clause-Patent
+;
+;Purpose:
+; define signed long shift right routine
+; __allshr
+;
+;Original Implemenation: MSVC 14.12.25827
+;
+;*******************************************************************************
+ .686
+ .model flat,C
+ .code
+
+
+
+;***
+;llshr - long shift right
+;
+;Purpose:
+; Does a signed Long Shift Right
+; Shifts a long right any number of bits.
+;
+;Entry:
+; EDX:EAX - long value to be shifted
+; CL - number of bits to shift by
+;
+;Exit:
+; EDX:EAX - shifted value
+;
+;Uses:
+; CL is destroyed.
+;
+;Exceptions:
+;
+;*******************************************************************************
+_allshr PROC NEAR
+
+;
+; Handle shifts of 64 bits or more (if shifting 64 bits or more, the result
+; depends only on the high order bit of edx).
+;
+ cmp cl,64
+ jae short RETSIGN
+
+;
+; Handle shifts of between 0 and 31 bits
+;
+ cmp cl, 32
+ jae short MORE32
+ shrd eax,edx,cl
+ sar edx,cl
+ ret
+
+;
+; Handle shifts of between 32 and 63 bits
+;
+MORE32:
+ mov eax,edx
+ sar edx,31
+ and cl,31
+ sar eax,cl
+ ret
+
+;
+; Return double precision 0 or -1, depending on the sign of edx
+;
+RETSIGN:
+ sar edx,31
+ mov eax,edx
+ ret
+
+_allshr ENDP
+
+ end
diff --git a/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf b/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
index fcbb93316cf7..86e74b57b109 100644
--- a/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
+++ b/CryptoPkg/Library/IntrinsicLib/IntrinsicLib.inf
@@ -30,6 +30,8 @@
Ia32/MathLShiftS64.c | MSFT
Ia32/MathRShiftU64.c | MSFT
Ia32/MathFtol.c | MSFT
+ Ia32/MathLlmul.asm | MSFT
+ Ia32/MathLlshr.asm | MSFT
Ia32/MathLShiftS64.c | INTEL
Ia32/MathRShiftU64.c | INTEL
--
2.33.0.windows.2
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