diff --git a/libavcodec/x86/ac3dsp.asm b/libavcodec/x86/ac3dsp.asm
index 0c00759c41..9d66fda7bb 100644
--- a/libavcodec/x86/ac3dsp.asm
+++ b/libavcodec/x86/ac3dsp.asm
@@ -41,8 +41,8 @@ SECTION .text
 ; void ff_ac3_exponent_min(uint8_t *exp, int num_reuse_blocks, int nb_coefs)
 ;-----------------------------------------------------------------------------
 
-%macro AC3_EXPONENT_MIN 1
-cglobal ac3_exponent_min_%1, 3,4,2, exp, reuse_blks, expn, offset
+%macro AC3_EXPONENT_MIN 0
+cglobal ac3_exponent_min, 3, 4, 2, exp, reuse_blks, expn, offset
     shl  reuse_blksq, 8
     jz .end
     LOOP_ALIGN
@@ -65,16 +65,17 @@ cglobal ac3_exponent_min_%1, 3,4,2, exp, reuse_blks, expn, offset
 
 %define PMINUB PMINUB_MMX
 %define LOOP_ALIGN
-INIT_MMX
-AC3_EXPONENT_MIN mmx
+INIT_MMX mmx
+AC3_EXPONENT_MIN
 %if HAVE_MMXEXT
 %define PMINUB PMINUB_MMXEXT
 %define LOOP_ALIGN ALIGN 16
-AC3_EXPONENT_MIN mmxext
+INIT_MMX mmxext
+AC3_EXPONENT_MIN
 %endif
 %if HAVE_SSE2_EXTERNAL
-INIT_XMM
-AC3_EXPONENT_MIN sse2
+INIT_XMM sse2
+AC3_EXPONENT_MIN
 %endif
 %undef PMINUB
 %undef LOOP_ALIGN
@@ -168,8 +169,8 @@ AC3_MAX_MSB_ABS_INT16 or_abs
 ; macro used for ff_ac3_lshift_int16() and ff_ac3_rshift_int32()
 ;-----------------------------------------------------------------------------
 
-%macro AC3_SHIFT 4 ; l/r, 16/32, shift instruction, instruction set
-cglobal ac3_%1shift_int%2_%4, 3,3,5, src, len, shift
+%macro AC3_SHIFT 3 ; l/r, 16/32, shift instruction, instruction set
+cglobal ac3_%1shift_int%2, 3, 3, 5, src, len, shift
     movd      m0, shiftd
 .loop:
     mova      m1, [srcq         ]
@@ -195,19 +196,19 @@ cglobal ac3_%1shift_int%2_%4, 3,3,5, src, len, shift
 ; void ff_ac3_lshift_int16(int16_t *src, unsigned int len, unsigned int shift)
 ;-----------------------------------------------------------------------------
 
-INIT_MMX
-AC3_SHIFT l, 16, psllw, mmx
-INIT_XMM
-AC3_SHIFT l, 16, psllw, sse2
+INIT_MMX mmx
+AC3_SHIFT l, 16, psllw
+INIT_XMM sse2
+AC3_SHIFT l, 16, psllw
 
 ;-----------------------------------------------------------------------------
 ; void ff_ac3_rshift_int32(int32_t *src, unsigned int len, unsigned int shift)
 ;-----------------------------------------------------------------------------
 
-INIT_MMX
-AC3_SHIFT r, 32, psrad, mmx
-INIT_XMM
-AC3_SHIFT r, 32, psrad, sse2
+INIT_MMX mmx
+AC3_SHIFT r, 32, psrad
+INIT_XMM sse2
+AC3_SHIFT r, 32, psrad
 
 ;-----------------------------------------------------------------------------
 ; void ff_float_to_fixed24(int32_t *dst, const float *src, unsigned int len)
@@ -215,8 +216,8 @@ AC3_SHIFT r, 32, psrad, sse2
 
 ; The 3DNow! version is not bit-identical because pf2id uses truncation rather
 ; than round-to-nearest.
-INIT_MMX
-cglobal float_to_fixed24_3dnow, 3,3,0, dst, src, len
+INIT_MMX 3dnow
+cglobal float_to_fixed24, 3, 3, 0, dst, src, len
     movq   m0, [pf_1_24]
 .loop:
     movq   m1, [srcq   ]
@@ -242,8 +243,8 @@ cglobal float_to_fixed24_3dnow, 3,3,0, dst, src, len
     femms
     RET
 
-INIT_XMM
-cglobal float_to_fixed24_sse, 3,3,3, dst, src, len
+INIT_XMM sse
+cglobal float_to_fixed24, 3, 3, 3, dst, src, len
     movaps     m0, [pf_1_24]
 .loop:
     movaps     m1, [srcq   ]
@@ -267,8 +268,8 @@ cglobal float_to_fixed24_sse, 3,3,3, dst, src, len
     emms
     RET
 
-INIT_XMM
-cglobal float_to_fixed24_sse2, 3,3,9, dst, src, len
+INIT_XMM sse2
+cglobal float_to_fixed24, 3, 3, 9, dst, src, len
     movaps     m0, [pf_1_24]
 .loop:
     movaps     m1, [srcq    ]
@@ -332,8 +333,8 @@ cglobal float_to_fixed24_sse2, 3,3,9, dst, src, len
     paddd    %1, %2
 %endmacro
 
-INIT_XMM
-cglobal ac3_compute_mantissa_size_sse2, 1,2,4, mant_cnt, sum
+INIT_XMM sse2
+cglobal ac3_compute_mantissa_size, 1, 2, 4, mant_cnt, sum
     movdqa      m0, [mant_cntq      ]
     movdqa      m1, [mant_cntq+ 1*16]
     paddw       m0, [mant_cntq+ 2*16]
@@ -373,20 +374,20 @@ cglobal ac3_compute_mantissa_size_sse2, 1,2,4, mant_cnt, sum
 ; void ff_ac3_extract_exponents(uint8_t *exp, int32_t *coef, int nb_coefs)
 ;------------------------------------------------------------------------------
 
-%macro PABSD_MMX 2 ; src/dst, tmp
+%macro PABSD 1-2 ; src/dst, unused
+%if cpuflag(ssse3)
+    pabsd    %1, %1
+%else ; src/dst, tmp
     pxor     %2, %2
     pcmpgtd  %2, %1
     pxor     %1, %2
     psubd    %1, %2
-%endmacro
-
-%macro PABSD_SSSE3 1-2 ; src/dst, unused
-    pabsd    %1, %1
+%endif
 %endmacro
 
 %if HAVE_AMD3DNOW_EXTERNAL
-INIT_MMX
-cglobal ac3_extract_exponents_3dnow, 3,3,0, exp, coef, len
+INIT_MMX 3dnow
+cglobal ac3_extract_exponents, 3, 3, 0, exp, coef, len
     add      expq, lenq
     lea     coefq, [coefq+4*lenq]
     neg      lenq
@@ -395,8 +396,8 @@ cglobal ac3_extract_exponents_3dnow, 3,3,0, exp, coef, len
 .loop:
     movq       m0, [coefq+4*lenq  ]
     movq       m1, [coefq+4*lenq+8]
-    PABSD_MMX  m0, m2
-    PABSD_MMX  m1, m2
+    PABSD      m0, m2
+    PABSD      m1, m2
     pslld      m0, 1
     por        m0, m3
     pi2fd      m2, m0
@@ -420,8 +421,8 @@ cglobal ac3_extract_exponents_3dnow, 3,3,0, exp, coef, len
     REP_RET
 %endif
 
-%macro AC3_EXTRACT_EXPONENTS 1
-cglobal ac3_extract_exponents_%1, 3,3,4, exp, coef, len
+%macro AC3_EXTRACT_EXPONENTS 0
+cglobal ac3_extract_exponents, 3, 3, 4, exp, coef, len
     add     expq, lenq
     lea    coefq, [coefq+4*lenq]
     neg     lenq
@@ -453,11 +454,10 @@ cglobal ac3_extract_exponents_%1, 3,3,4, exp, coef, len
 %endmacro
 
 %if HAVE_SSE2_EXTERNAL
-INIT_XMM
-%define PABSD PABSD_MMX
-AC3_EXTRACT_EXPONENTS sse2
+INIT_XMM sse2
+AC3_EXTRACT_EXPONENTS
+%endif
 %if HAVE_SSSE3_EXTERNAL
-%define PABSD PABSD_SSSE3
-AC3_EXTRACT_EXPONENTS ssse3
-%endif
+INIT_XMM ssse3
+AC3_EXTRACT_EXPONENTS
 %endif