SUBPS — Subtract Packed Single Precision Floating-Point Values

Opcode/Instruction	Op/E n	64/32 bit Mode Support	CPUID Feature Flag	Description
NP 0F 5C /r SUBPS xmm1, xmm2/m128	A	V/V	SSE	Subtract packed single precision floating-point values in xmm2/mem from xmm1 and store result in xmm1.
VEX.128.0F.WIG 5C /r VSUBPS xmm1,xmm2, xmm3/m128	B	V/V	AVX	Subtract packed single precision floating-point values in xmm3/mem from xmm2 and stores result in xmm1.
VEX.256.0F.WIG 5C /r VSUBPS ymm1, ymm2, ymm3/m256	B	V/V	AVX	Subtract packed single precision floating-point values in ymm3/mem from ymm2 and stores result in ymm1.
EVEX.128.0F.W0 5C /r VSUBPS xmm1 {k1}{z}, xmm2, xmm3/m128/m32bcst	C	V/V	AVX512VL AVX512F	Subtract packed single precision floating-point values from xmm3/m128/m32bcst to xmm2 and stores result in xmm1 with writemask k1.
EVEX.256.0F.W0 5C /r VSUBPS ymm1 {k1}{z}, ymm2, ymm3/m256/m32bcst	C	V/V	AVX512VL AVX512F	Subtract packed single precision floating-point values from ymm3/m256/m32bcst to ymm2 and stores result in ymm1 with writemask k1.
EVEX.512.0F.W0 5C /r VSUBPS zmm1 {k1}{z}, zmm2, zmm3/m512/m32bcst{er}	C	V/V	AVX512F	Subtract packed single precision floating-point values in zmm3/m512/m32bcst from zmm2 and stores result in zmm1 with writemask k1.

Instruction Operand Encoding ¶

Op/En	Tuple Type	Operand 1	Operand 2	Operand 3	Operand 4
A	N/A	ModRM:reg (r, w)	ModRM:r/m (r)	N/A	N/A
B	N/A	ModRM:reg (w)	VEX.vvvv (r)	ModRM:r/m (r)	N/A
C	Full	ModRM:reg (w)	EVEX.vvvv (r)	ModRM:r/m (r)	N/A

Description ¶

Performs a SIMD subtract of the packed single precision floating-point values in the second Source operand from the First Source operand, and stores the packed single precision floating-point results in the destination operand.

VEX.128 and EVEX.128 encoded versions: The second source operand is an XMM register or an 128-bit memory location. The first source operand and destination operands are XMM registers. Bits (MAXVL-1:128) of the corresponding destination register are zeroed.

VEX.256 and EVEX.256 encoded versions: The second source operand is an YMM register or an 256-bit memory location. The first source operand and destination operands are YMM registers. Bits (MAXVL-1:256) of the corresponding destination register are zeroed.

EVEX.512 encoded version: The second source operand is a ZMM register, a 512-bit memory location or a 512-bit vector broadcasted from a 32-bit memory location. The first source operand and destination operands are ZMM registers. The destination operand is conditionally updated according to the writemask.

128-bit Legacy SSE version: The second source can be an XMM register or an 128-bit memory location. The destination is not distinct from the first source XMM register and the upper Bits (MAXVL-1:128) of the corresponding register destination are unmodified.

Operation ¶

VSUBPS (EVEX Encoded Versions When SRC2 Operand is a Vector Register) ¶

(KL, VL) = (4, 128), (8, 256), (16, 512)
IF (VL = 512) AND (EVEX.b = 1)
    THEN
        SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(EVEX.RC);
    ELSE
        SET_ROUNDING_MODE_FOR_THIS_INSTRUCTION(MXCSR.RC);
FI;
FOR j := 0 TO KL-1
    i := j * 32
    IF k1[j] OR *no writemask*
        THEN DEST[i+31:i] := SRC1[i+31:i] - SRC2[i+31:i]
    ELSE
        IF *merging-masking* ; merging-masking
            THEN *DEST[31:0] remains unchanged*
            ELSE ; zeroing-masking
                DEST[31:0] := 0
        FI;
    FI;
ENDFOR;
DEST[MAXVL-1:VL] := 0

VSUBPS (EVEX Encoded Versions When SRC2 Operand is a Memory Source) ¶

(KL, VL) = (4, 128), (8, 256),(16, 512)
FOR j := 0 TO KL-1
    i := j * 32
    IF k1[j] OR *no writemask* THEN
            IF (EVEX.b = 1)
                THEN DEST[i+31:i] := SRC1[i+31:i] - SRC2[31:0];
                ELSE DEST[i+31:i] := SRC1[i+31:i] - SRC2[i+31:i];
            FI;
    ELSE
        IF *merging-masking* ; merging-masking
            THEN *DEST[31:0] remains unchanged*
            ELSE ; zeroing-masking
                DEST[31:0] := 0
        FI;
    FI;
ENDFOR;
DEST[MAXVL-1:VL] := 0

VSUBPS (VEX.256 Encoded Version) ¶

DEST[31:0] := SRC1[31:0] - SRC2[31:0]
DEST[63:32] := SRC1[63:32] - SRC2[63:32]
DEST[95:64] := SRC1[95:64] - SRC2[95:64]
DEST[127:96] := SRC1[127:96] - SRC2[127:96]
DEST[159:128] := SRC1[159:128] - SRC2[159:128]
DEST[191:160] := SRC1[191:160] - SRC2[191:160]
DEST[223:192] := SRC1[223:192] - SRC2[223:192]
DEST[255:224] := SRC1[255:224] - SRC2[255:224].
DEST[MAXVL-1:256] := 0

VSUBPS (VEX.128 Encoded Version) ¶

DEST[31:0] := SRC1[31:0] - SRC2[31:0]
DEST[63:32] := SRC1[63:32] - SRC2[63:32]
DEST[95:64] := SRC1[95:64] - SRC2[95:64]
DEST[127:96] := SRC1[127:96] - SRC2[127:96]
DEST[MAXVL-1:128] := 0

SUBPS (128-bit Legacy SSE Version) ¶

DEST[31:0] := SRC1[31:0] - SRC2[31:0]
DEST[63:32] := SRC1[63:32] - SRC2[63:32]
DEST[95:64] := SRC1[95:64] - SRC2[95:64]
DEST[127:96] := SRC1[127:96] - SRC2[127:96]
DEST[MAXVL-1:128] (Unmodified)

Intel C/C++ Compiler Intrinsic Equivalent ¶

VSUBPS __m512 _mm512_sub_ps (__m512 a, __m512 b);

VSUBPS __m512 _mm512_mask_sub_ps (__m512 s, __mmask16 k, __m512 a, __m512 b);

VSUBPS __m512 _mm512_maskz_sub_ps (__mmask16 k, __m512 a, __m512 b);

VSUBPS __m512 _mm512_sub_round_ps (__m512 a, __m512 b, int);

VSUBPS __m512 _mm512_mask_sub_round_ps (__m512 s, __mmask16 k, __m512 a, __m512 b, int);

VSUBPS __m512 _mm512_maskz_sub_round_ps (__mmask16 k, __m512 a, __m512 b, int);

VSUBPS __m256 _mm256_sub_ps (__m256 a, __m256 b);

VSUBPS __m256 _mm256_mask_sub_ps (__m256 s, __mmask8 k, __m256 a, __m256 b);

VSUBPS __m256 _mm256_maskz_sub_ps (__mmask16 k, __m256 a, __m256 b);

SUBPS __m128 _mm_sub_ps (__m128 a, __m128 b);

VSUBPS __m128 _mm_mask_sub_ps (__m128 s, __mmask8 k, __m128 a, __m128 b);

VSUBPS __m128 _mm_maskz_sub_ps (__mmask16 k, __m128 a, __m128 b);

SIMD Floating-Point Exceptions ¶

Overflow, Underflow, Invalid, Precision, Denormal.

Other Exceptions ¶

VEX-encoded instructions, see Table 2-19, “Type 2 Class Exception Conditions.”

EVEX-encoded instructions, see Table 2-46, “Type E2 Class Exception Conditions.”