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Fixed assembly code for ARM (Thumb and regular) for some compilers

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This commit is contained in:
Paul Bakker 2013-03-06 18:14:52 +01:00
parent e81beda60f
commit fb1cbd3cea
2 changed files with 80 additions and 57 deletions
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1
ChangeLog
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@ -7,6 +7,7 @@ Bugfix
128-bits (found by Yawning Angel)
* Fixes for 64-bit compilation with MS Visual Studio
* Fixed net_bind() for specified IP addresses on little endian systems
* Fixed assembly code for ARM (Thumb and regular) for some compilers
Changes
* Internally split up rsa_pkcs1_encrypt(), rsa_pkcs1_decrypt(),

136
include/polarssl/bn_mul.h
View file

@ -551,75 +551,97 @@
#if defined(__thumb__)
#define MULADDC_INIT \
asm( "ldr r0, %0 " :: "m" (s)); \
asm( "ldr r1, %0 " :: "m" (d)); \
asm( "ldr r2, %0 " :: "m" (c)); \
asm( "ldr r3, %0 " :: "m" (b)); \
asm( "lsr r7, r3, #16 " ); \
asm( "mov r9, r7 " ); \
asm( "lsl r7, r3, #16 " ); \
asm( "lsr r7, r7, #16 " ); \
asm( "mov r8, r7 " );
asm( \
" \
ldr r0, %3; \
ldr r1, %4; \
ldr r2, %5; \
ldr r3, %6; \
lsr r7, r3, #16; \
mov r9, r7; \
lsl r7, r3, #16; \
lsr r7, r7, #16; \
mov r8, r7; \
"
#define MULADDC_CORE \
asm( "ldmia r0!, {r6} " ); \
asm( "lsr r7, r6, #16 " ); \
asm( "lsl r6, r6, #16 " ); \
asm( "lsr r6, r6, #16 " ); \
asm( "mov r4, r8 " ); \
asm( "mul r4, r6 " ); \
asm( "mov r3, r9 " ); \
asm( "mul r6, r3 " ); \
asm( "mov r5, r9 " ); \
asm( "mul r5, r7 " ); \
asm( "mov r3, r8 " ); \
asm( "mul r7, r3 " ); \
asm( "lsr r3, r6, #16 " ); \
asm( "add r5, r5, r3 " ); \
asm( "lsr r3, r7, #16 " ); \
asm( "add r5, r5, r3 " ); \
asm( "add r4, r4, r2 " ); \
asm( "mov r2, #0 " ); \
asm( "adc r5, r2 " ); \
asm( "lsl r3, r6, #16 " ); \
asm( "add r4, r4, r3 " ); \
asm( "adc r5, r2 " ); \
asm( "lsl r3, r7, #16 " ); \
asm( "add r4, r4, r3 " ); \
asm( "adc r5, r2 " ); \
asm( "ldr r3, [r1] " ); \
asm( "add r4, r4, r3 " ); \
asm( "adc r2, r5 " ); \
asm( "stmia r1!, {r4} " );
" \
ldmia r0!, {r6}; \
lsr r7, r6, #16; \
lsl r6, r6, #16; \
lsr r6, r6, #16; \
mov r4, r8; \
mul r4, r6; \
mov r3, r9; \
mul r6, r3; \
mov r5, r9; \
mul r5, r7; \
mov r3, r8; \
mul r7, r3; \
lsr r3, r6, #16; \
add r5, r5, r3; \
lsr r3, r7, #16; \
add r5, r5, r3; \
add r4, r4, r2; \
mov r2, #0; \
adc r5, r2; \
lsl r3, r6, #16; \
add r4, r4, r3; \
adc r5, r2; \
lsl r3, r7, #16; \
add r4, r4, r3; \
adc r5, r2; \
ldr r3, [r1]; \
add r4, r4, r3; \
adc r2, r5; \
stmia r1!, {r4}; \
"
#define MULADDC_STOP \
asm( "str r2, %0 " : "=m" (c)); \
asm( "str r1, %0 " : "=m" (d)); \
asm( "str r0, %0 " : "=m" (s) :: \
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7", "r8", "r9" );
" \
str r2, %0; \
str r1, %1; \
str r0, %2; \
" \
: "=m" (c), "=m" (d), "=m" (s) \
: "m" (s), "m" (d), "m" (c), "m" (b) \
: "r0", "r1", "r2", "r3", "r4", "r5", \
"r6", "r7", "r8", "r9" \
);
#else
#define MULADDC_INIT \
asm( "ldr r0, %0 " :: "m" (s)); \
asm( "ldr r1, %0 " :: "m" (d)); \
asm( "ldr r2, %0 " :: "m" (c)); \
asm( "ldr r3, %0 " :: "m" (b));
asm( \
" \
ldr r0, %3; \
ldr r1, %4; \
ldr r2, %5; \
ldr r3, %6; \
"
#define MULADDC_CORE \
asm( "ldr r4, [r0], #4 " ); \
asm( "mov r5, #0 " ); \
asm( "ldr r6, [r1] " ); \
asm( "umlal r2, r5, r3, r4 " ); \
asm( "adds r7, r6, r2 " ); \
asm( "adc r2, r5, #0 " ); \
asm( "str r7, [r1], #4 " );
" \
ldr r4, [r0], #4; \
mov r5, #0; \
ldr r6, [r1]; \
umlal r2, r5, r3, r4; \
adds r7, r6, r2; \
adc r2, r5, #0; \
str r7, [r1], #4; \
"
#define MULADDC_STOP \
asm( "str r2, %0 " : "=m" (c)); \
asm( "str r1, %0 " : "=m" (d)); \
asm( "str r0, %0 " : "=m" (s) :: \
"r0", "r1", "r2", "r3", "r4", "r5", "r6", "r7" );
" \
str r2, %0; \
str r1, %1; \
str r0, %2; \
" \
: "=m" (c), "=m" (d), "=m" (s) \
: "m" (s), "m" (d), "m" (c), "m" (b) \
: "r0", "r1", "r2", "r3", "r4", "r5", \
"r6", "r7" \
);
#endif /* Thumb */