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Don't use r7 in generic codepath

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Signed-off-by: Dave Rodgman <dave.rodgman@arm.com>
This commit is contained in:
Dave Rodgman 2023-05-25 11:00:05 +01:00
parent 1ae50aebb9
commit cee166e3f5
1 changed files with 5 additions and 12 deletions
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15
library/bn_mul.h
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@ -679,15 +679,8 @@
#elif defined(__thumb2__) // Thumb 2 ISA
#if defined(__GNUC__) && !defined(__OPTIMIZE__)
// gcc -O0: only V6+DSP codepath builds
#if (__ARM_ARCH >= 6) && defined (__ARM_FEATURE_DSP) && (__ARM_FEATURE_DSP == 1)
#define ARM_V6_DSP
#endif
#else
// gcc with optimisation, or armclang: any codepath builds
// Any codepath builds.
#define ARM_V6_DSP_OR_THUMB_2
#endif
#elif defined(__arm__) // Arm ISA
@ -841,9 +834,9 @@
"mov r5, #0 \n\t" \
"ldr r6, [r1] \n\t" \
"umlal r2, r5, r3, r4 \n\t" \
"adds r7, r6, r2 \n\t" \
"adds r4, r6, r2 \n\t" \
"adc r2, r5, #0 \n\t" \
"str r7, [r1], #4 \n\t"
"str r4, [r1], #4 \n\t"
#define MULADDC_X1_STOP \
"str r2, %0 \n\t" \
@ -852,7 +845,7 @@
: "=m" (c), "=m" (d), "=m" (s) \
: "m" (s), "m" (d), "m" (c), "m" (b) \
: "r0", "r1", "r2", "r3", "r4", "r5", \
"r6", "r7", "cc" \
"r6", "cc" \
);
#endif /* Arm */