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x86: Fix constraints for decode_significance*_x86

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Originally, prior to 8742a4ff8, the caller code was compiled
within this condition:

ARCH_X86 && HAVE_7REGS && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)

Since HAVE_7REGS is defined as
(ARCH_X86_64 || (HAVE_EBX_AVAILABLE && HAVE_EBP_AVAILABLE))
the subcondition HAVE_7REGS && HAVE_EBX_AVAILABLE is equal
to HAVE_7REGS (for 32 bit at least). The correct simplification
of the original condition thus is HAVE_7REGS, not
HAVE_EBX_AVAILABLE.

This fixes compilation in some cases where HAVE_EBP_AVAILABLE = 0
and HAVE_EBX_AVAILABLE = 1.

Signed-off-by: Martin Storsjö <martin@martin.st>
This commit is contained in:
Martin Storsjö 2011-12-26 21:47:20 +02:00
parent 723c35feb0
commit 676a9ee1d2
2 changed files with 3 additions and 3 deletions
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2
libavcodec/h264_cabac.c
View File

@ -1656,7 +1656,7 @@ decode_cabac_residual_internal(H264Context *h, DCTELEM *block,
index[coeff_count++] = last;\
}
const uint8_t *sig_off = significant_coeff_flag_offset_8x8[MB_FIELD];
#if ARCH_X86 && HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
#if ARCH_X86 && HAVE_7REGS && !defined(BROKEN_RELOCATIONS)
coeff_count= decode_significance_8x8_x86(CC, significant_coeff_ctx_base, index,
last_coeff_ctx_base, sig_off);
} else {

4
libavcodec/x86/h264_i386.h
View File

@ -36,7 +36,7 @@
//FIXME use some macros to avoid duplicating get_cabac (cannot be done yet
//as that would make optimization work hard)
#if HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS)
#if HAVE_7REGS && !defined(BROKEN_RELOCATIONS)
static int decode_significance_x86(CABACContext *c, int max_coeff,
uint8_t *significant_coeff_ctx_base,
int *index, x86_reg last_off){
@ -144,6 +144,6 @@ static int decode_significance_8x8_x86(CABACContext *c,
);
return coeff_count;
}
#endif /* HAVE_EBX_AVAILABLE && !defined(BROKEN_RELOCATIONS) */
#endif /* HAVE_7REGS && !defined(BROKEN_RELOCATIONS) */
#endif /* AVCODEC_X86_H264_I386_H */