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SP Thumb2/ARM32: P-384 sub not needed for small builds

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Don't have an implementation of sp_384_sub when building for small code
size.
This commit is contained in:
Sean Parkinson
2025-11-24 10:45:36 +10:00
parent 59f4fa5686
commit 46c704f51f
2 changed files with 4 additions and 111 deletions
Download Patch File Download Diff File Expand all files Collapse all files
wolfcrypt/src/sp_arm32.c
+2 -53
View File
@@ -92181,58 +92181,7 @@ WC_OMIT_FRAME_POINTER static void sp_384_mont_tpl_12(sp_digit* r,
);
}
#ifdef WOLFSSL_SP_SMALL
/* Sub b from a into r. (r = a - b)
*
* r A single precision integer.
* a A single precision integer.
* b A single precision integer.
*/
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
WC_OMIT_FRAME_POINTER static sp_digit sp_384_sub_12(sp_digit* r_p,
const sp_digit* a_p, const sp_digit* b_p)
#else
WC_OMIT_FRAME_POINTER static sp_digit sp_384_sub_12(sp_digit* r,
const sp_digit* a, const sp_digit* b)
#endif /* WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
register sp_digit* r asm ("r0") = (sp_digit*)r_p;
register const sp_digit* a asm ("r1") = (const sp_digit*)a_p;
register const sp_digit* b asm ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
__asm__ __volatile__ (
"mov r12, #0\n\t"
"add lr, %[a], #48\n\t"
"\n"
"L_sp_384_sub_12_word_%=: \n\t"
"rsbs r12, r12, #0\n\t"
"ldm %[a]!, {r3, r4, r5, r6}\n\t"
"ldm %[b]!, {r7, r8, r9, r10}\n\t"
"sbcs r3, r3, r7\n\t"
"sbcs r4, r4, r8\n\t"
"sbcs r5, r5, r9\n\t"
"sbcs r6, r6, r10\n\t"
"stm %[r]!, {r3, r4, r5, r6}\n\t"
"sbc r12, r3, r3\n\t"
"cmp %[a], lr\n\t"
"bne L_sp_384_sub_12_word_%=\n\t"
"mov %[r], r12\n\t"
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
: [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
:
#else
:
: [r] "r" (r), [a] "r" (a), [b] "r" (b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
: "memory", "cc", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
"r12", "lr"
);
return (word32)(size_t)r;
}
#else
#ifndef WOLFSSL_SP_SMALL
/* Sub b from a into r. (r = a - b)
*
* r A single precision integer.
@@ -92288,7 +92237,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_384_sub_12(sp_digit* r,
return (word32)(size_t)r;
}
#endif /* WOLFSSL_SP_SMALL */
#endif /* !WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Conditionally add a and b using the mask m.
* m is -1 to add and 0 when not.
wolfcrypt/src/sp_cortexm.c
+2 -58
View File
@@ -45506,63 +45506,7 @@ WC_OMIT_FRAME_POINTER SP_NOINLINE static void sp_384_mont_tpl_12(sp_digit* r,
);
}
#ifdef WOLFSSL_SP_SMALL
/* Sub b from a into r. (r = a - b)
*
* r A single precision integer.
* a A single precision integer.
* b A single precision integer.
*/
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
WC_OMIT_FRAME_POINTER static sp_digit sp_384_sub_12(sp_digit* r_p,
const sp_digit* a_p, const sp_digit* b_p)
#else
WC_OMIT_FRAME_POINTER static sp_digit sp_384_sub_12(sp_digit* r,
const sp_digit* a, const sp_digit* b)
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
{
#ifndef WOLFSSL_NO_VAR_ASSIGN_REG
register sp_digit* r __asm__ ("r0") = (sp_digit*)r_p;
register const sp_digit* a __asm__ ("r1") = (const sp_digit*)a_p;
register const sp_digit* b __asm__ ("r2") = (const sp_digit*)b_p;
#endif /* !WOLFSSL_NO_VAR_ASSIGN_REG */
__asm__ __volatile__ (
"MOV r11, #0x0\n\t"
"ADD r12, %[a], #0x30\n\t"
"\n"
#if defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
"L_sp_384_sub_12_word:\n\t"
#else
"L_sp_384_sub_12_word_%=:\n\t"
#endif
"RSBS r11, r11, #0x0\n\t"
"LDM %[a]!, {r3, r4, r5, r6}\n\t"
"LDM %[b]!, {r7, r8, r9, r10}\n\t"
"SBCS r3, r3, r7\n\t"
"SBCS r4, r4, r8\n\t"
"SBCS r5, r5, r9\n\t"
"SBCS r6, r6, r10\n\t"
"STM %[r]!, {r3, r4, r5, r6}\n\t"
"SBC r11, r3, r3\n\t"
"CMP %[a], r12\n\t"
#if defined(__GNUC__)
"BNE L_sp_384_sub_12_word_%=\n\t"
#elif defined(__IAR_SYSTEMS_ICC__) && (__VER__ < 9000000)
"BNE.N L_sp_384_sub_12_word\n\t"
#else
"BNE.N L_sp_384_sub_12_word_%=\n\t"
#endif
"MOV %[r], r11\n\t"
: [r] "+r" (r), [a] "+r" (a), [b] "+r" (b)
:
: "memory", "cc", "r3", "r4", "r5", "r6", "r7", "r8", "r9", "r10",
"r11", "r12"
);
return (word32)(size_t)r;
}
#else
#ifndef WOLFSSL_SP_SMALL
/* Sub b from a into r. (r = a - b)
*
* r A single precision integer.
@@ -45613,7 +45557,7 @@ WC_OMIT_FRAME_POINTER static sp_digit sp_384_sub_12(sp_digit* r,
return (word32)(size_t)r;
}
#endif /* WOLFSSL_SP_SMALL */
#endif /* !WOLFSSL_SP_SMALL */
#ifdef WOLFSSL_SP_SMALL
/* Conditionally add a and b using the mask m.
* m is -1 to add and 0 when not.