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Don't include unnecessary code when only 1 curve size is supported.

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This commit is contained in:
Ken MacKay
2015-10-12 21:29:57 -07:00
parent 4014bbd378
commit 096495aeb7
1 changed files with 24 additions and 6 deletions
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asm_arm.inc
+24 -6
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@@ -49,10 +49,12 @@ uECC_VLI_API uECC_word_t uECC_vli_add(uECC_word_t *result,
const uECC_word_t *left, const uECC_word_t *left,
const uECC_word_t *right, const uECC_word_t *right,
wordcount_t num_words) { wordcount_t num_words) {
#if (uECC_PLATFORM == uECC_arm_thumb) || (uECC_PLATFORM == uECC_arm_thumb2) #if (uECC_MAX_WORDS != uECC_MIN_WORDS)
#if (uECC_PLATFORM == uECC_arm_thumb) || (uECC_PLATFORM == uECC_arm_thumb2)
uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 2 + 1; uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 2 + 1;
#else /* ARM */ #else /* ARM */
uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 4; uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 4;
#endif
#endif #endif
uint32_t carry; uint32_t carry;
uint32_t left_word; uint32_t left_word;
@@ -61,15 +63,19 @@ uECC_VLI_API uECC_word_t uECC_vli_add(uECC_word_t *result,
__asm__ volatile ( __asm__ volatile (
".syntax unified \n\t" ".syntax unified \n\t"
"movs %[carry], #0 \n\t" "movs %[carry], #0 \n\t"
#if (uECC_MAX_WORDS != uECC_MIN_WORDS)
"mov %[left], pc \n\t" "mov %[left], pc \n\t"
"adds %[jump], %[left] \n\t" "adds %[jump], %[left] \n\t"
#endif
"ldmia %[lptr]!, {%[left]} \n\t" "ldmia %[lptr]!, {%[left]} \n\t"
"ldmia %[rptr]!, {%[right]} \n\t" "ldmia %[rptr]!, {%[right]} \n\t"
"adds %[left], %[right] \n\t" "adds %[left], %[right] \n\t"
"stmia %[dptr]!, {%[left]} \n\t" "stmia %[dptr]!, {%[left]} \n\t"
#if (uECC_MAX_WORDS != uECC_MIN_WORDS)
"bx %[jump] \n\t" "bx %[jump] \n\t"
#endif
"ldmia %[lptr]!, {%[left]} \n\t" "ldmia %[lptr]!, {%[left]} \n\t"
"ldmia %[rptr]!, {%[right]} \n\t" "ldmia %[rptr]!, {%[right]} \n\t"
@@ -112,7 +118,10 @@ uECC_VLI_API uECC_word_t uECC_vli_add(uECC_word_t *result,
"adcs %[carry], %[carry] \n\t" "adcs %[carry], %[carry] \n\t"
RESUME_SYNTAX RESUME_SYNTAX
: [dptr] REG_RW_LO (result), [lptr] REG_RW_LO (left), [rptr] REG_RW_LO (right), : [dptr] REG_RW_LO (result), [lptr] REG_RW_LO (left), [rptr] REG_RW_LO (right),
[jump] REG_RW_LO (jump), [carry] REG_WRITE_LO (carry), [left] REG_WRITE_LO (left_word), #if (uECC_MAX_WORDS != uECC_MIN_WORDS)
[jump] REG_RW_LO (jump),
#endif
[carry] REG_WRITE_LO (carry), [left] REG_WRITE_LO (left_word),
[right] REG_WRITE_LO (right_word) [right] REG_WRITE_LO (right_word)
: :
: "cc", "memory" : "cc", "memory"
@@ -125,10 +134,12 @@ uECC_VLI_API uECC_word_t uECC_vli_sub(uECC_word_t *result,
const uECC_word_t *left, const uECC_word_t *left,
const uECC_word_t *right, const uECC_word_t *right,
wordcount_t num_words) { wordcount_t num_words) {
#if (uECC_PLATFORM == uECC_arm_thumb) || (uECC_PLATFORM == uECC_arm_thumb2) #if (uECC_MAX_WORDS != uECC_MIN_WORDS)
#if (uECC_PLATFORM == uECC_arm_thumb) || (uECC_PLATFORM == uECC_arm_thumb2)
uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 2 + 1; uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 2 + 1;
#else /* ARM */ #else /* ARM */
uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 4; uint32_t jump = ((uECC_MAX_WORDS - num_words) * 4 + 5) * 4;
#endif
#endif #endif
uint32_t carry; uint32_t carry;
uint32_t left_word; uint32_t left_word;
@@ -137,15 +148,19 @@ uECC_VLI_API uECC_word_t uECC_vli_sub(uECC_word_t *result,
__asm__ volatile ( __asm__ volatile (
".syntax unified \n\t" ".syntax unified \n\t"
"movs %[carry], #0 \n\t" "movs %[carry], #0 \n\t"
#if (uECC_MAX_WORDS != uECC_MIN_WORDS)
"mov %[left], pc \n\t" "mov %[left], pc \n\t"
"adds %[jump], %[left] \n\t" "adds %[jump], %[left] \n\t"
#endif
"ldmia %[lptr]!, {%[left]} \n\t" "ldmia %[lptr]!, {%[left]} \n\t"
"ldmia %[rptr]!, {%[right]} \n\t" "ldmia %[rptr]!, {%[right]} \n\t"
"subs %[left], %[right] \n\t" "subs %[left], %[right] \n\t"
"stmia %[dptr]!, {%[left]} \n\t" "stmia %[dptr]!, {%[left]} \n\t"
#if (uECC_MAX_WORDS != uECC_MIN_WORDS)
"bx %[jump] \n\t" "bx %[jump] \n\t"
#endif
"ldmia %[lptr]!, {%[left]} \n\t" "ldmia %[lptr]!, {%[left]} \n\t"
"ldmia %[rptr]!, {%[right]} \n\t" "ldmia %[rptr]!, {%[right]} \n\t"
@@ -188,7 +203,10 @@ uECC_VLI_API uECC_word_t uECC_vli_sub(uECC_word_t *result,
"adcs %[carry], %[carry] \n\t" "adcs %[carry], %[carry] \n\t"
RESUME_SYNTAX RESUME_SYNTAX
: [dptr] REG_RW_LO (result), [lptr] REG_RW_LO (left), [rptr] REG_RW_LO (right), : [dptr] REG_RW_LO (result), [lptr] REG_RW_LO (left), [rptr] REG_RW_LO (right),
[jump] REG_RW_LO (jump), [carry] REG_WRITE_LO (carry), [left] REG_WRITE_LO (left_word), #if (uECC_MAX_WORDS != uECC_MIN_WORDS)
[jump] REG_RW_LO (jump),
#endif
[carry] REG_WRITE_LO (carry), [left] REG_WRITE_LO (left_word),
[right] REG_WRITE_LO (right_word) [right] REG_WRITE_LO (right_word)
: :
: "cc", "memory" : "cc", "memory"